backend developer

Waracle

<div>Waracle are looking for a Principal Developer to join our world-class digital technology consultancy and home to a diverse, smart, curious, and ambitious community of specialists in technology-driven transformation. We work with ambitious clients to help them solve their biggest business and customer challenges. We help our clients to innovate and create intelligent digital products and services. We thrive on complex challenges and deliver business-critical IT transformation projects, moving seamlessly from strategy, design, and delivery to operations.
This is a Hybrid role working from our London office 2 days a week.<h3 class="jobSectionHeader">
Shape the Future of Digital Innovation</h3>
As a Principal Developer, you will act as a strategic technical leader, guiding and shaping robust architectures, data strategies, and cloud-native environments across multiple squads and collaborative programmes. In this role, you will champion technical excellence, making thoughtful choices that balance cost, security, performance, and user experience to help Waracle scale and deliver high-performance, world-class products. If you are a collaborative leader who thrives on mentoring talent, fostering inclusive engineering communities, and navigating complex technical landscapes with empathy and pragmatism, we would love to welcome you to our team.<h3 class="jobSectionHeader">
Duties of This Role</h3>
Reporting to the Head of Engineering, your role will cover:<ul><li>
Solving Complex Technical Challenges: Partner closely with client technical and business stakeholders at all levels, gaining a deep understanding of their technology estates to advise on impactful, world-class digital solutions.</li><li>
Technical Excellence &amp; Delivery: Shape architectures across multiple squads; select tools and frameworks to scale across clients while optimising for cost, security, performance, and scalability.</li><li>
Collaboration &amp; Stakeholder Management: Act as a trusted advisor to clients on technical strategy and roadmaps, translating complex technical concepts into clear, accessible communication for senior stakeholders.</li><li>
Leadership &amp; Community Cultivation: Mentor Lead and Senior Engineers, foster and grow our engineering community of practice, and ensure cross-team alignment on technical standards.</li><li>
Culture &amp; Knowledge Sharing: Define and evolve Waracle&rsquo;s technical standards while contributing to our shared body of knowledge through lessons learned, thought leadership, and good practices.</li></ul> 
What You'll Bring 
Research shows that women and underrepresented groups often apply to jobs only if they meet 100% of the qualifications. At Waracle, we hire for potential, passion, and a collaborative mindset just as much as current experience. If you share our values and believe you can excel in this role, we strongly encourage you to apply&mdash;even if you don't tick every single box<ul><li>
Architectural Leadership: Proven experience designing, documenting, and scaling complex back-end architectures, distributed systems, microservices, and database designs (SQL and other technologies) within cloud-native environments&mdash;particularly Azure (with a focus on API management, maintenance, and scaling).</li><li>
Technical Direction &amp; Delivery Ownership: Strong leadership capability to set clear technical direction, maintain a dedicated ownership mindset, and foster high-standard outcomes across complex enterprise projects.</li><li>
Consultative Communication: Excellent communication and influencing skills, with a demonstrated ability to navigate complex client organisations, support diverse stakeholders, and pragmatically balance commercial constraints with high technical standards.</li><li>
Team Mentorship &amp; Growth: A proven track record of mentoring, developing, and aligning senior engineers and technical leaders to foster a collaborative culture of continuous learning and psychological safety.</li><li>
Modern SDLC Innovation: A pragmatic, forward-thinking understanding of leveraging and applying AI acceleration tools within the Software Development Life Cycle to optimise engineering practices.</li></ul><h3 class="jobSectionHeader">
The Recruitment Process</h3>
You can expect an initial call with your dedicated Talent Acquisition Partner, who will chat with you about Waracle, what you are looking for in a new position, the salary for the role, notice period, and benefits. After that, you'll be invited to a two-stage interview process where you will have an opportunity to find out more about the role and showcase your skills and experience. Your Talent Acquisition Partner will guide and support you through the whole process right up to your first day with us</div>

Principal Backend Developer

<div>Waracle are looking for a Lead Developer to join our world-class digital technology consultancy and home to a diverse, smart, curious, and ambitious community of specialists in technology-driven transformation. We work with ambitious clients to help them solve their biggest business and customer challenges. We help our clients to innovate and create intelligent digital products and services. We thrive on complex challenges and deliver business-critical IT transformation projects, moving seamlessly from strategy, design, and delivery to operations.
This is a Hybrid role working from our London office 2 days a week.<h3 class="jobSectionHeader">
Shape the Future of Digital Innovation</h3>
As a Lead Developer, you will provide technical leadership across squads, defining architecture, guiding engineering best practices, and ensuring high-quality delivery aligned with client and business goals. You will translate business priorities into technical roadmaps, manage delivery expectations around scope, budget, and timelines, and create a psychologically safe, high-performing environment where teams can thrive.
If you are a collaborative leader who thrives on solving complex technical challenges, enjoys mentoring and empowering teams, and is passionate about delivering high-quality solutions that create real business value, we would love to welcome you to our team.<h3 class="jobSectionHeader">
Duties of This Role</h3>
Reporting to the Head of Engineering, your role will cover:<ul><li>
Strategic Planning &amp; Roadmaps: Translate business objectives into effective technical strategies, ensuring engineering roadmaps align with long-term client goals and deliver sustainable value.</li><li>
Stakeholder Management &amp; Collaboration: Facilitate workshops to understand requirements, align technical solutions with business needs, and manage expectations around scope, budget, priorities, and delivery outcomes.</li><li>
Team Leadership &amp; Empowerment: Lead squads and projects with accountability for successful delivery, fostering a collaborative, inclusive, and psychologically safe environment where teams can thrive.</li><li>
Operational Excellence &amp; Delivery Focus: Own technical delivery outcomes by making informed decisions and pragmatic trade-offs across scope, quality, and timelines to maintain delivery momentum.</li><li>
Culture &amp; Knowledge Sharing: Define and evolve Waracle&rsquo;s technical standards while contributing to our shared body of knowledge through lessons learned, thought leadership, and good practices.</li></ul> 
What You'll Bring 
Research shows that women and underrepresented groups often apply to jobs only if they meet 100% of the qualifications. At Waracle, we hire for potential, passion, and a collaborative mindset just as much as current experience. If you share our values and believe you can excel in this role, we strongly encourage you to apply&mdash;even if you don't tick every single box<ul><li>
Technical Architecture &amp; Scalability: Proven experience designing, documenting, and scaling complex back-end architectures, distributed systems, microservices, and database designs (SQL and other technologies) within cloud-native environments&mdash;particularly Azure (with a focus on API management, maintenance, and scaling).</li><li>
Cloud &amp; Engineering Excellence: Strong expertise in cloud-native technologies, building fault-tolerant systems, and implementing effective monitoring, observability, and alerting strategies to ensure operational reliability.</li><li>
Commercial &amp; Delivery Awareness: Demonstrable understanding of balancing technical decisions with business priorities, managing scope, budgets, delivery expectations, and evolving client needs.</li><li>
Technical Leadership &amp; Mentorship: Proven ability to lead engineering squads, influence technical direction, mentor senior engineers, and promote a culture of collaboration, learning, and engineering excellence.</li></ul><h3 class="jobSectionHeader">
The Recruitment Process</h3>
You can expect an initial call with your dedicated Talent Acquisition Partner, who will chat with you about Waracle, what you are looking for in a new position, the salary for the role, notice period, and benefits. After that, you'll be invited to a two-stage interview process where you will have an opportunity to find out more about the role and showcase your skills and experience. Your Talent Acquisition Partner will guide and support you through the whole process right up to your first day with us</div>

Lead Backend Developer

YOTI

<div>Who we are
Born in 2014, Yoti is a digital identity and biometric technology company that makes it safer for people to prove who they are. The Yoti app was designed with privacy at its core, giving people a secure way to prove their identity and share third-party credentials with organisations and other people.
Today, we have over twenty million app downloads around the world. We&rsquo;ve expanded our offering to a suite of business solutions that span identity verification, age verification and estimation, e-signing, AI anti-spoofing technologies and we continue to think of innovative new offerings.
From day one, we&rsquo;ve been working to fix an outdated identity system. This is not a journey we make on our own but with policy advisors, think tanks, researchers, academics, humanitarian bodies, our users and everyday people. We are committed to solving identity problems through grassroots research and social purpose initiatives.
Our dedication to our mission and our team is why Yoti was proudly named one of the Sunday Times Best Places to Work 2026.
Purpose of the Role: Working on our Core platform as one of the developers to design, build and maintain the server software that powers Yoti.
Role Dimensions: Reporting to Core Team Lead
Principal Responsibilities:<ul><li>
Developing the server software required to support business needs, from design through to implementation and integration testing.</li><li>
Ensuring that the local development environment, the CI/CD system and all other relevant tools are in the best conditions to support development and the release process.</li><li>
Participate in the architecture definition in collaboration with Team Leads and VP of Engineering.</li><li>
Work closely with the team members and the team leads to ensure that tech development and delivery is implemented to specification and with good quality.</li><li>
Work with and support other teams within Yoti as they interact with our platform.</li></ul> 
What we hope to see from you:<ul><li>
Experience writing secure and reliable software. While we use Go, you do not have to have used it before, only an interest to learn.</li><li>
Linux knowledge.</li><li>
Knowledge of modern version control tools (git), and how to use them effectively (informative commit messages, code review).</li><li>
Experience working with microservices and related technologies such as gRPC, Kubernetes and Docker is an advantage.</li><li>
Experience in security and cryptography is a definite plus.</li><li>
Able to communicate ideas clearly and collaborate across teams.</li><li>
You are able to work with all parts of the business and to work directly with other teams, addressing any challenges and supporting business goals.</li><li>
Able to pick up and work on new requirements.</li><li>
Comfortable owning projects from start to finish, while working collaboratively with the wider team</li><li>
Interest in learning more about technology, keeping up to date with new developments and best practices.</li></ul> 
Interview Process
Stage 1 - Call with a talent acquisition team member (30 minutes)
Stage 2 - Call with team member(s) (45 minutes)
Stage 3 - Technical assessment
Stage 4 - In person interview (120 minutes) 
What&rsquo;s in it for you?
Flexibility &amp; Balance<ul><li>
Hybrid Working: Enjoy the best of both worlds with a blend of home working and time spent in our central London, dog-friendly office.</li><li>
Core Working Hours: We focus on outputs, not clock-watching. Our core hours support the flexibility you need for a genuine work-life balance.</li><li>
Work from Anywhere: Want a change of scenery? Take advantage of our policy to work remotely from abroad for short periods.</li></ul> 
Health &amp; Financial Peace of Mind<ul><li>
Comprehensive Health Cover: Private medical insurance that includes full dental and optical care via Aviva.</li><li>
Enhanced Pension: After three years of service, we offer to enhance your employer pension contributions to help you secure your future.</li><li>
Enhanced Sick Pay: You&rsquo;ll have eight days of Sick Pay each calendar year, for both mental and physical health issues.</li><li>
Life Assurance: Peace of mind for you and your loved ones with our company-funded life assurance policy.</li><li>
Electric Vehicle Salary Sacrifice Scheme: Drive a brand-new electric vehicle and save up on lease costs by paying directly from your gross, pre-tax salary.</li><li>
Cycle to Work Scheme: Save money on a brand-new bike, e-bike, or safety equipment through tax-free salary deductions.</li></ul> 
Leave and Wellbeing<ul><li>
Generous Annual Leave: 25 days holiday as standard, plus your Birthday Off to celebrate properly.</li><li>
&quot;Yotiversary&quot; Days: Loyalty rewarded - earn up to three additional paid days off based on your length of service.</li><li>
Enhanced Parental Leave: We support growing families with up to six months&rsquo; fully paid maternity leave, 2 weeks of paid paternity leave plus a further four weeks of enhanced flexibility and time off, and enhanced parental provisions. Feel free to ask for more details!</li><li>
Wellbeing Support: Access to trained, in-house Mental Health First Aiders whenever you need a confidential chat, plus a fully comprehensive Employee Assistant Program.</li></ul> 
Growth and Giving Back<ul><li>
Personal Development Budget: A dedicated, individual training budget to spend on your professional growth, plus quarterly YOTI Afternoons dedicated entirely to your professional development.</li><li>
&ldquo;Selfie Time&quot;: Paid time off every year to focus on volunteering, charity work, or personal passion projects.</li><li>
Matched Fundraising: Double your impact - we match charitable fundraising contributions made by our team.</li><li>
Unpaid Sabbatical: Career breaks available for long-term travel or personal resets after continuous service.</li></ul> 
This is a great opportunity to join a company that is leading the way for innovative and responsible identity verification. We&rsquo;re looking for people who can adapt to a fast-paced environment, as well as champion our brand and what we stand for. We value a positive attitude and people who have a collaborative, creative and transparent approach to solving problems.
AI Usage during the recruitment process
Please read our AI Usage in Recruitment policy to know more about how Yoti uses AI in the recruitment process and our stance on how candidates can use AI during the interview process.
We believe in equal opportunities
It takes a diverse community of passionate, talented and committed people to build a simpler, more secure way of proving identity. We&rsquo;re an equal opportunity employer, so we welcome applications from people of all backgrounds, with different outlooks and experiences.
We are proud to be a Disability Confident employer and we&rsquo;re committed to making our recruitment process as inclusive and accessible as possible.
If you have a disability or long-term condition and need any adjustments or support during the application or interview process, please let us know &mdash; we&rsquo;ll do everything we can to support you and to enable you to bring your best self to our hiring process.
Pre-employment checks
If your application is successful please be aware that as part of our pre-employment checks: We will check your details against fraud prevention databases. We will check identity; address match; PEPs and sanctions; bank validation, verification, fraud checks, negative data (CCJ, bankruptcy). If our investigations identify fraud or other criminal offences both when applying for a job and during your employment, we will record the details on the relevant fraud prevention databases. This information may be accessed from the UK and other countries and used by law enforcement agencies and other organisations to prevent fraud. Please contact peopleteam@Yoti.com to get information on which fraud prevention databases we use.
For more information about how we manage your data please read our Applicant Privacy Notice.</div>

Mid Backend Developer

Mustard Systems Ltd.

<div>
 At Mustard Systems, we leverage statistical modeling to dive into sports events and help us make informed predictions about future outcomes. By utilising our unique datasets, advanced statistical models, and custom-built software, we strive to accurately forecast sports results.
 
 
 We value quick delivery and real-world impact over perfect code. If you're an engineer who thrives on solving problems quickly and enjoys a flexible, outcome-focused culture, you'll fit right in.
 
 
 
 What You'll Work On:
 
 
 
 <ul>
 <li>
 Expand our access to new liquidity providers, through advanced web scraping and reverse engineering techniques
 </li>
 <li>
 Develop and maintain low-latency real-time data feeds, based on the data extracted, to support trading strategies
 </li>
 <li>
 Enhance system visibility for our teams to provide insight into integration issues and improvements
 
 
 </li>
 </ul>
 We work with an agile approach, following a flexible plan that adapts to new information and opportunities as they arise. Developers are a core part of this process, taking full ownership of their software throughout its lifecycle&mdash;from design and development to testing, review, and production support.
 
 
 
 Key Responsibilities
 
 
 
 <ul>
 <li>
 Design and Build Impactful Features: Develop new features that align with and drive our business goals, delivering high-quality code that brings measurable value
 </li>
 <li>
 Collaborate on Code Quality: Review and test code from teammates to ensure functionality, maintainability, performance, and quality standards
 </li>
 <li>
 Support in Production: Take ownership of your team's software in production, ensuring stability and quickly addressing any issues that arise
 </li>
 <li>
 Cross-Team Collaboration: Work closely with other development teams on cross-functional projects, and partner with traders and quants to design and implement the best solutions to real business problems
 </li>
 <li>
 Participate in Out of Hours Support for our Software Systems
 
 
 
 </li>
 </ul>
 
 Core Tech Stack:
 
 
 
 <ul>
 <li>
 Languages: Python (Python 3.10+), JavaScript/TypeScript for frontend work, and Go for select infrastructure
 </li>
 <li>
 Tools: RabbitMQ and Kafka for messaging, PostgreSQL and Redis for data storage
 </li>
 <li>
 Environment: Linux servers
 </li>
 <li>
 Observability: OpenTelemetry, Prometheus, Grafana and Zabbix
 
 
 
 </li>
 </ul>
 
 Requirements
 
 
 
 
 
 Must-Haves:
 
 
 
 <ul>
 <li>
 Strong background in software development, with strong experience with Python
 </li>
 <li>
 A degree in Computer Science or a numerical subject from a top university
 </li>
 <li>
 Exceptional communication skills, enabling you to convey complex technical ideas clearly to both technical and non-technical audiences
 </li>
 <li>
 Strong decision-making abilities, with a knack for making thoughtful trade-offs in both implementation and architectural choices, balancing innovation and practicality
 </li>
 <li>
 Experience with web scraping and reverse engineering techniques, including working against bot protection tooling
 </li>
 <li>
 At least 3 years experience in software development
 
 
 
 </li>
 </ul>
 
 Nice-to-Haves:
 
 
 
 <ul>
 <li>
 Familiarity with building event-driven systems
 </li>
 <li>
 Comfort with Linux/Unix environments
 </li>
 <li>
 Track record of driving successful cloud migrations, ideally to AWS, including setting up secure, scalable account and access structures
 
 
 
 </li>
 </ul>
 
 Benefits
 
 
 
 
 
 Why join Mustard Systems?
 
 
 
 <ul>
 <li>
 Hybrid working environment. We're in the office every Monday, Tuesday and Thursday, and work from home every Wednesday and Friday
 </li>
 <li>
 Work on cutting-edge systems in a competitive and innovative field
 </li>
 <li>
 Collaborate with a smart, driven team, where your contributions directly impact business performance
 </li>
 <li>
 Opportunity to drive the company's technical direction and double its revenue in the next three years
 
 
 
 </li>
 </ul>
 
 Comprehensive benefits, including:
 
 
 
 <ul>
 <li>
 Competitive salary and significant bonus potential
 </li>
 <li>
 Enhanced pension match with salary sacrifice option
 </li>
 <li>
 Health insurance and life assurance
 </li>
 <li>
 Sabbatical leave after five years
 </li>
 <li>
 33 days of annual leave (including bank holidays)
 </li>
 </ul>
</div>

Python Backend Developer

Navan

<div>We are looking for a Senior Backend Platform Developer to build modern services for Navan's contact center systems. This is a software engineering role first: where you will design APIs, serverless services, data flows, observability tooling, and AI-enabled workflows that support our customer and agent experience.

The contact center is the domain, but the core need is strong development capability. The right person is comfortable building production systems, integrating complex platforms, and using AI-assisted engineering tools to move quickly without sacrificing quality.

What You'll Do:
<ul>
<li>Production-grade Node.js services on AWS Lambda, API Gateway, and event-driven serverless patterns.</li>
<li>Secure APIs and integrations across internal systems, customer data, and third-party platforms.</li>
<li>Technical patterns, implementation standards, and reusable services for the broader contact center systems roadmap.</li>
<li>Observability pipelines using OpenSearch, CloudWatch, Kibana, Snowflake, and structured logging.</li>
<li>Automation and AI-enabled workflows that improve routing, agent support, troubleshooting, and operational visibility.</li>
<li>Migration tooling and services that help move legacy telephony and contact center workflows onto modern platforms, with enough design discipline to support future scale.</li>
</ul>
What We're Looking For
<ul>
<li>5+ years of backend software engineering experience, ideally with Node.js or TypeScript.</li>
<li>Strong API design, system architecture, integration, debugging, and asynchronous systems experience.</li>
<li>Hands-on experience with AWS Lambda or similar cloud/serverless architecture.</li>
<li>Experience with logging, monitoring, search, data pipelines, or production observability.</li>
<li>Practical use of AI coding assistants for development, testing, refactoring, and troubleshooting.</li>
<li>Fluency with GitHub workflows, including pull requests, code review, branching, and CI/CD collaboration.</li>
<li>Senior-level judgment to turn ambiguous operational problems into clean, maintainable technical solutions.</li>
</ul>
Helpful Domain Experience
<ul>
<li>Experience in contact center, telephony, customer support, or workflow automation environments.</li>
<li>Exposure to platforms such as Genesys Cloud, Twilio, Five9, NICE, Zoom Contact Center, or Avaya.</li>
<li>Familiarity with routing, queues, IVR, SIP, phone number management, call metadata, or agent-assist workflows.</li>
<li>Experience with Snowflake SQL, Terraform, CloudFormation, AWS SAM, or related infrastructure tooling.</li>
</ul>
This senior role will help Navan modernize the technical foundation behind our contact center environment. The work includes legacy platform migration, improved reliability and observability, AI-enabled automation, and new services that make our customer and agent experiences faster, smarter, and easier to operate.</div>

Senior Backend Platform Developer, Contact Center Systems

Trainline

<div>About us
We are champions of rail, inspired to build a greener, more sustainable future of travel. Trainline enables millions of travellers to find and book the best value tickets across carriers, fares, and journey options through our highly rated mobile app, website, and B2B partner channels.
Great journeys start with Trainline
Now Europe&rsquo;s number 1 downloaded rail app, with over 135 million monthly visits and &pound;6.3 billion in annual ticket sales, we collaborate with 270+ rail and coach companies in over 40 countries. We want to create a world where travel is as simple, seamless, eco-friendly and affordable as it should be.
Today, we're a FTSE 250 company driven by our incredible team of over 1,000 Trainliners from 50+ nationalities, based across London, Paris, Barcelona, Milan, Edinburgh and Madrid. With our focus on growth in the UK and Europe, now is the perfect time to join us on this high-speed journey.<h1 class="jobSectionHeader">
Introducing the Trainline Cloud Native Developer Experience Team
</h1>At Trainline, we're evolving the platform that powers millions of journeys across Europe. As part of our Cloud Native Acceleration Programme, we're modernising our backend services to create a more scalable, resilient and efficient engineering platform. This programme is about more than migrating workloads. It's an opportunity to redefine how .NET services are built, deployed and operated, helping teams deliver faster while improving reliability and reducing operational complexity.
As a Senior C# Engineer, you'll play a key role in shaping our cloud-native engineering standards. Working closely with Platform Engineering, Infrastructure, Security and product development teams, you'll modernise existing services, build reusable patterns and develop automation that accelerates engineering across the organisation. Your work will have a lasting impact on both the developer experience and the resilience of our platform.
Success in this role is measured not only by modernising services, but by raising engineering capability across Trainline through reusable tooling, technical leadership, collaboration and the adoption of cloud-native engineering practices and by the ability to collaborate across the organisation.<h2 class="jobSectionHeader">
In this role as the Senior C# Engineer, you will...
</h2><ul><li>Modernise existing .NET services by containerising applications for Amazon ECS, removing legacy infrastructure dependencies and optimising services for cloud-native operation.</li><li>
Design and build resilient distributed systems by improving health checks, fault tolerance, observability and runtime behaviour to enhance service reliability and reduce operational incidents.</li><li>
Define and evolve the .NET migrations by creating reusable service templates, engineering standards and best practices covering dependency injection, configuration, logging, monitoring and deployment.</li><li>
Develop automation and AI-assisted tooling that accelerates cloud migration by analysing existing services, identifying modernisation opportunities and generating infrastructure and deployment scaffolding.</li><li>
Optimise containerised workloads to improve performance, resource utilisation and scalability, helping teams deliver efficient, cost-effective services at scale.</li><li>
Partner with engineering teams across Trainline to drive adoption of cloud-native engineering practices, influence technical direction and build consensus around modernisation approaches that enable successful service migrations.</li><li>
Contribute to the continuous improvement of CI/CD pipelines and deployment processes, enabling faster, safer and more consistent software delivery.</li><li>
Champion cloud-native engineering through technical leadership, documentation, design reviews, demos, mentoring and engineering community engagement, helping teams adopt consistent engineering practices with confidence.</li></ul><h2 class="jobSectionHeader">
We'd love to hear from you if you have...
</h2><h3 class="jobSectionHeader">Core skills</h3><ul><li>
Strong professional experience developing applications with C# and .NET, alongside a solid understanding of software engineering principles and modern backend architecture.</li><li>
A good understanding of distributed systems, including resilience patterns, observability, scalability and performance optimisation.</li><li>
Experience designing reusable engineering patterns, frameworks or shared libraries that improve consistency and developer experience across multiple teams.</li><li>
Strong collaboration and communication skills, with the ability to work effectively across engineering teams and influence technical decisions through partnership and expertise.</li><li>
A continuous learning mindset and a passion for improving engineering practices, modernising legacy systems and delivering measurable business impact.</li></ul><h3 class="jobSectionHeader">
Infra and Cloud Native experience</h3><ul><li>
Experience developing and maintaining Infrastructure as Code using Terraform (or equivalent), alongside a strong understanding of CI/CD pipelines and modern software delivery practices.</li><li>
Experience building and operating cloud-native applications using containers and orchestration technologies within AWS and Amazon ECS.</li></ul><h3 class="jobSectionHeader">
AI experience</h3><ul><li>
Experience using AI-assisted engineering tools to improve productivity, quality and software delivery, while applying sound judgement to validate outputs.
</li><li>You're curious about the rapidly evolving AI landscape and can identify practical opportunities to apply AI to engineering workflows, automation and developer experience - ideally through first hand experience.</li></ul><h3 class="jobSectionHeader">
Communicating and Influence</h3><ul><li>
A track record of influencing technical decisions across engineering teams through collaboration, clear communication and technical credibility.</li><li>
Strong communication and collaboration skills, with the ability to explain technical concepts to diverse audiences, build trusted relationships and help drive organisational adoption of engineering standards and best practices.</li></ul>
More information:
Enjoy fantastic perks like private healthcare &amp; dental insurance, a generous work from abroad policy, 2-for-1 share purchase plans, an EV Scheme to further reduce carbon emissions, extra festive time off, and excellent family-friendly benefits.
We prioritise career growth with clear career paths, transparent pay bands, personal learning budgets, and regular learning days. Jump on board and supercharge your career from day one!
We're operating a hybrid model and ask that Trainliners work from the office a minimum of 60% of their time over a 12-week period. We also have a 28-day Work from Abroad policy.
Our values represent the things that matter most to us and what we live and breathe everyday, in everything we do:<ul><li>
Think Big - We're building the future of rail</li><li>
Own It - We focus on every customer, partner and journey</li><li>
 Travel Together - We're one team</li><li>
Do Good - We make a positive impact</li></ul>
We know that having a diverse team makes us better and helps us succeed. And we mean all forms of diversity - gender, ethnicity, sexuality, disability, nationality and diversity of thought. That's why we're committed to creating inclusive places to work, where everyone belongs and differences are valued and celebrated.
Interested in finding out more about what it's like to work at Trainline? Why not check us out on LinkedIn, Instagram and Glassdoor!
Compensation Range: &pound;85K - &pound;95K</div>

Senior Backend Engineer - Developer Experience

Opus Recruitment Solutions

<div>
 
 Freelance: Full‑Stack Developer (Insurance Experience Required)
 
 
 Start Date: 20/07/26
 
 
 Duration: 6 Months (extension highly likely)
 
 
 Location: London (Fully Remote)
 
 
 Capacity: 40 hours per week
 
 
 
 
 
 
 About the Role
 
 
 
 We&rsquo;re looking for an experienced Full‑Stack Developer with Insurance domain expertise to support the development and scaling of a high‑growth digital platform within the insurance sector.
 
 
 You will work across both frontend and backend layers, collaborating closely with product, design, and engineering teams to deliver robust, scalable, and high‑performance solutions.
 
 
 A key focus of the role will be building modern user interfaces (Vue.js) while contributing to backend services, APIs, and architecture that support complex insurance workflows and data models.
 
 
 
 
 
 
 Key Responsibilities
 
 
 
 
 
 
 Design, develop, and maintain full‑stack applications across frontend and backend layers.
 
 
 Build modern, responsive frontend applications using Vue.js.
 
 
 Develop and maintain backend services and APIs to support business logic and integrations.
 
 
 Work with insurance-related systems, data structures, and workflows (e.g. policies, claims, underwriting).
 
 
 Collaborate with product managers, designers, and other developers to deliver high‑quality features.
 
 
 Integrate frontend components with backend services and third‑party APIs.
 
 
 Contribute to architectural decisions across the full technology stack.
 
 
 Identify and resolve performance, scalability, and UI/UX issues.
 
 
 Ensure code quality through best practices, testing, and code reviews.
 
 
 Support the continuous improvement of development processes and system reliability.
 
 
 
 
 
 
 Required Skills
 
 
 
 
 
 
 Strong commercial experience as a Full‑Stack Developer.
 
 
 Proven experience working within the insurance domain (mandatory).
 
 
 Strong frontend expertise with Vue.js (Vue 2 and/or Vue 3). (other frontend technologies feel free to apply)
 
 
 Proficiency in JavaScript and TypeScript.
 
 
 Backend development experience (e.g. Node.js, Java, or similar).
 
 
 Experience designing and consuming RESTful and/or GraphQL APIs.
 
 
 Knowledge of state management (Vuex, Pinia, etc.).
 
 
 Solid understanding of HTML5, CSS3, and responsive design principles.
 
 
 Familiarity with databases (SQL and/or NoSQL).
 
 
 Experience with modern development tools, version control (Git), and CI/CD pipelines.
 
 
 Strong problem-solving skills and ability to work in a distributed team.
 
 
 
 
 
 
 Nice to Have (Not Required)
 
 
 
 
 
 
 Experience with Nuxt.js.
 
 
 Experience with cloud platforms (AWS, GCP, or Azure).
 
 
 Familiarity with insurance platforms or standards (e.g. Guidewire, INSIS, or similar).
 
 
 Exposure to automated testing frameworks (Jest, Cypress, Playwright).
 
 
 Experience working in a fast-paced or scaling environment.
 
 
 Knowledge of microservices architecture or event-driven systems.
 
</div>

Full Stack Engineer

Explore 160+ Backend developer in London this July. Find roles across top companies and apply now to boost your career.