node.js developer

Opus Recruitment Solutions

<div>
 
 Node.js Developer (Full Stack)
 
 
 Location: London
 
 
 Security Clearance:
 
 Must hold active DV Clearance
 
 
 
 Employment Type: Contract (flexible)
 
 
 Duration: 6 Months
 
 
 
 
 
 
 Overview
 
 
 
 We are seeking an experienced DV Cleared Node.js Developer to join a high-performing engineering team working on secure, mission-critical systems. This is a fantastic opportunity to contribute to complex projects within a highly secure environment, using modern technologies across both backend and frontend development.
 
 
 You will play a key role in designing, developing, and maintaining scalable applications, working closely with cross-functional teams in an Agile environment.
 
 
 
 
 
 
 Key Responsibilities
 
 
 
 Design, develop, and maintain robust backend services using Node.js
 
 
 Build secure, scalable APIs and microservices architectures
 
 
 Develop responsive and user-friendly frontend components using modern frameworks
 
 
 Collaborate with UX/UI designers to deliver high-quality user experiences
 
 
 Work within Agile / Scrum teams, contributing to sprint planning and delivery
 
 
 Ensure code quality through testing, code reviews, and best practices
 
 
 Maintain and improve system performance, security, and reliability
 
 
 Integrate with third-party systems and internal services
 
 
 Work in highly secure environments adhering to strict compliance requirements
 
 
 
 
 
 
 
 
 
 Required Skills &amp; Experience
 
 
 
 
 Backend
 
 
 
 
 
 
 Strong commercial experience with Node.js (Express.js / NestJS preferred)
 
 
 Experience building RESTful APIs and microservices
 
 
 Good understanding of asynchronous programming and event-driven architecture
 
 
 Familiarity with databases such as MongoDB, PostgreSQL, or similar
 
 
 Knowledge of authentication and security best practices (OAuth, JWT, etc.)
 
 
 
 
 
 
 Frontend
 
 
 
 
 
 
 Solid experience with modern frontend frameworks such as:
 
 
 
 
 
 React, Angular, or Vue.js
 
 
 
 
 
 
 
 
 Strong proficiency in JavaScript / TypeScript
 
 
 Experience with HTML5, CSS3, and responsive design
 
 
 Understanding of UI/UX principles
 
 
 
 
 
 
 General
 
 
 
 
 
 
 Experience with Git and version control workflows
 
 
 Familiarity with CI/CD pipelines and DevOps practices
 
 
 Experience working in Agile environments
 
 
 Strong problem-solving and communication skills
 
 
 
 
 
 Desirable Skills
 
 
 
 
 
 Experience with cloud platforms (AWS, Azure, or GCP)
 
 
 Knowledge of containerisation technologies (Docker, Kubernetes)
 
 
 Familiarity with infrastructure as code (Terraform, CloudFormation)
 
 
 Experience in secure or government environments
 
 
 Understanding of testing frameworks (Jest, Mocha, Cypress)
 
 
 
 
 
 Security Requirements
 
 
 
 
 
 Active DV Clearance is essential
 
 
 (Candidates must currently hold valid clearance to be considered)
 
</div>

Javascript 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

<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

NewDay

<div>As a Platform Engineer at NewDay , you'll create the tooling, automation, and cloud platforms that make software delivery seamless across Azure and AWS. Rather than building customer-facing applications, you'll be building the developer experience creating scalable platforms, simplifying deployments, and enabling hundreds of engineers to deliver software faster, safer, and more efficiently. If you're a software engineer who enjoys solving engineering challenges through automation, cloud technologies, and modern platform engineering, we'd love to hear from you.
How you'll contribute
<ul><li>Build and evolve the internal developer platform, creating tools and services that enable engineering teams to develop, test, deploy, and operate applications with ease.
</li><li>Develop deployment tooling and automation using modern software engineering practices, helping simplify and accelerate software delivery across Azure and AWS.
</li><li>Identify opportunities to remove friction, improve self-service capabilities, and enable developers to move faster.
</li><li>Design and implement cloud-native solutions using containers, Infrastructure as Code, and CI/CD pipelines to improve platform scalability, resilience, and security.
</li><li>Collaborate closely with Platform Engineering, SRE, and development teams to introduce new technologies, establish engineering standards, and continuously improve our platform capabilities.
</li></ul>We're looking for these essential skills
<ul><li>Hands-on experience with Microsoft Azure and/or AWS, including core cloud services such as compute, storage, networking, databases, identity, and PaaS offerings (e.g. Azure App Services, Azure Functions, AWS Lambda, and equivalents).
</li><li>software engineering background with TypeScript/Node.js (or .NET/C#), with experience building internal platforms, deployment tooling, and automation that improves the developer experience.
</li><li>Proven experience implementing Infrastructure as Code and automated CI/CD pipelines using tools such as Terraform or ARM templates, GitHub Actions, TeamCity, Octopus Deploy, or equivalent technologies.
</li><li>Experience with containerisation and cloud-native technologies, including Docker and Kubernetes, with an understanding of scalable, resilient, and highly available platform architectures across Azure and/or AWS.
</li><li>Strong knowledge of DevOps and platform engineering practices, including Agile delivery, GitHub and Jira, networking, authentication and authorisation, digital certificates, cloud security, and supporting engineering teams through effective platform tooling.
</li></ul>It's a plus if you also have these skills
<ul><li>Experience building and operating Kubernetes platforms in production environments.
</li><li>Knowledge of Infrastructure as Code using Terraform, ARM, or Bicep to provision and manage cloud infrastructure.
</li><li>Experience creating and maintaining CI/CD pipelines using tools such as GitHub Actions, Octopus Deploy, or similar technologies.
</li><li>Familiarity with monitoring and observability tools such as Azure Application Insights, Log Analytics, or Grafana.
</li><li>Experience promoting DevOps best practices, contributing to open-source tooling, or helping engineering teams adopt modern platform engineering approaches.
</li></ul>At NewDay, we value all types of diversity. We&rsquo;re an equal opportunity employer and believe that our differences create a vibrant, authentic working culture. We want all our colleagues to feel able to bring their whole selves to work. We don&rsquo;t discriminate on the basis of protected characteristics or identities. We make sure that every job is crafted to be inclusive and that people with disabilities or caring responsibilities can take part in the application and interview process.
Tell us if you need accommodations: We&rsquo;ll put reasonable adjustments in place to support you.
We work with Textio to make our job design and hiring inclusive.
Permanent</div>

Platform Engineer

Applied Computing

<div>Applied Computing was founded in 2024 to build Orbital, a physics-informed foundation model for energy operations. We&rsquo;re live across oil and gas, refineries, and petrochemicals, working towards our mission: sustainable abundance for a growing planet. 
The hydrocarbon industry keeps the world running. But its complexity has left operators tied to legacy systems, making critical decisions on less than 10% of available data. We built Orbital to change that. It&rsquo;s a foundation model built specifically for energy that lets companies use AI at scale, harnessing all of their operational 
data and optimising in real time for any metric. Decisions get faster, operations get safer, and carbon intensity falls. 
We&rsquo;ve raised over $32 million, including one of the largest seed rounds for an 
AI company in the UK. We&rsquo;re just getting started
As a Senior Full Stack Engineer on the Core AI team, you will build the platform that makes Orbital a scalable product. You will own the internal application layers, developer facing APIs, shared UI components, and integration frameworks that power every Orbital deployment.
This is a product engineering role focused on building reusable systems. You will collaborate with AI research, Infra, and software teams to translate complex industrial workflows into reliable system components and intuitive user interfaces.
Your work will define how users interact with Orbital across control rooms, engineering teams, and cloud-based environments.
What Success Looks Like<ul><li>Orbital ships with high-quality dashboards and interfaces that users rely on daily</li><li>Core APIs and services provide stable, well-documented contracts for AI, data, and automation features</li><li>Frontend and backend codebases are modular, well-structured, and easy to extend</li><li>Releases are frequent, reliable, and backed by strong CI/CD pipelines</li><li>Features scale from one deployment to many without site-specific rework or bespoke</li></ul>
engineering<div>
Requirements 
<ul><li>Strong software engineering fundamentals (data structures, algorithms, complexity)</li><li>Solid understanding of system design patterns and architectural trade-offs</li><li>Strong proficiency in JavaScript / TypeScript</li><li>Experience building complex applications in React or Svelte</li><li>Ability to design reusable UI components and frontend architecture</li><li>Python for APIs, orchestration, and data integration</li><li>Backend experience with Node.js, FastAPI, Express, or similar frameworks</li><li>Experience designing and maintaining API-driven systems</li><li>Experience building containerised microservices using Docker and Kubernetes</li><li>Familiarity with distributed systems and event-driven architectures</li><li>Experience with message brokers such as Kafka or RabbitMQ</li><li>Comfortable working in Linux environments for debugging and performance tuning</li><li>Hands-on experience with AWS (EKS, S3, IAM, CloudWatch, networking fundamentals)</li></ul></div><div> 
Product &amp; Engineering Mindset 
<ul><li>Comfortable operating in a fast-moving product environment with evolving</li></ul>
requirements 
<ul><li>Strong collaboration skills across AI, infra, and product teams</li><li>Bias toward reliability, resilience, and long-term maintainability</li><li>Ability to design systems that scale across customers, sites, and industrial verticals</li><li>Comfortable shipping on a bi-weekly release cadence</li></ul></div><div> 
What This Role Is Not 
<ul><li>Not a pure frontend or UI-only role</li><li>Not infrastructure-only or DevOps-focused</li><li>Not a research or modelling role</li><li>Not a one-off project engineer; this role builds core platform primitives</li></ul></div><div>
1. Full Stack Product Development 
<ul><li>Build features across the product stack: data access, backend services, APIs, and UI</li></ul>
layers 
<ul><li>Develop backend logic that exposes:</li></ul>
o Time-series forecasts 
o Physics-based model outputs 
o LLM and agent outputs 
As stable product features</div><ul><li>
Create internal tools and workflows that support multiple engineering and operational use cases without custom deployments</li><li>
Ensure all application layers meet strict standards for:</li></ul>
o Reliability 
o Security 
o Observability 
o Performance 
Across cloud and on-prem environments<div> 
2. Platform &amp; Microservices Architecture 
<ul><li>Design and implement containerised microservices running in Kubernetes clusters</li><li>Create shared services and libraries that enable reuse across Orbital verticals</li><li>Define API boundaries and service contracts that allow AI and infra layers to evolve</li></ul>
independently</div><div>
3. Core Platform Engineering 
<ul><li>Collaborate with Product, AI Research, ML Engineering, and Infra teams on:</li></ul>
o Product requirements 
o Long-term platform architecture 
<ul><li>Build interface layers that expose inference, physics-based reasoning, and optimisation</li></ul>
as first-class platform capabilities 
<ul><li>Implement abstractions for:</li></ul>
o Data ingestion 
o Inference orchestration 
o Scheduling 
o Monitoring and health checks 
<ul><li>Establish design patterns and engineering standards that unify the Orbital ecosystem</li></ul></div><div> 
4. Software Engineering Excellence 
<ul><li>Write clean, modular, maintainable code across frontend and backend systems</li><li>Set up and improve CI/CD pipelines for:</li></ul>
o Automated testing 
o QA 
o Rapid, safe releases 
<ul><li>Participate in code reviews and architectural discussions</li><li>Leverage modern agentic coding tools to increase velocity while maintaining</li></ul>
correctness and readability</div>
Benefits
Competitive salary and benefits 
Ability to work from the office or remote 
Employment contract in UK or India, EOR or contractor options available in other jurisdictions 
Exciting high traction AI product</div>

Staff Software Engineer

Pixel Systems

<div>
 We are adding a Web Developer Intern to our team to help us build out the internal infrastructure for an established London client. The work involves taking manual processes that currently live in cumbersome spreadsheets and turning them into stable, web-based tools. You will be working closely with our senior developers to build dashboards and data entry systems that help this client manage their daily operations more effectively. This is a full-time, fully remote position where you will get to see how professional software is built from the ground up.
 
 
 
 About Pixel Systems
 
 
 Pixel Systems is a small software agency that functions entirely remote. We skip the flashy consumer apps and social media clones to focus on the software that actually keeps businesses running. Our specialty is the practical stuff: admin panels, CRM integrations, and complex database migrations. Our clients come to us when their current systems are breaking or when they need to replace a sprawling mess of spreadsheets with a real database.
 
 Our approach is simple and honest. We provide fixed quotes before we start any project, we show our progress through weekly demos, and we hand over everything once we are done: the code, the documentation, and walkthrough videos. We use reliable technologies like Node, React, and Postgres because we want the software we build to be stable and easy to maintain. We are a team that values working code over perfect plans, and we prefer solving real operational headaches over chasing the latest industry trends.
 
 
 
 The Role
 
 
 In this role, you will help us build the tools that real people use to do their jobs. A large part of your work will involve moving data between different systems and ensuring that information is displayed clearly on internal dashboards. You will be helping us write code to clean up legacy data, building out new frontend components for user interfaces, and ensuring that our applications are responsive and functional. This is not about making things look pretty for a marketing campaign; it is about making sure a warehouse manager or an operations lead can find the information they need without a struggle.
 
 Since we are a remote team, you will spend a lot of time communicating in writing. You will be expected to update your progress frequently and ask questions when you hit a wall. You will see the entire lifecycle of a project, from the initial data mapping to the final delivery to our client in London. This internship is a paid position, and we offer a rate that is competitive for the role and the current market.
 
 
 
 What we look for
 
 
 We are looking for someone who is organized and has a basic grasp of how the web works. You do not need to be an expert, but you should be comfortable with HTML, CSS, and the basics of JavaScript. Most importantly, you should be someone who enjoys logical puzzles and is okay with work that is useful rather than flashy. We value clarity in code and in communication.
 <ul>
 <li>
 A basic understanding of web development and how browsers render pages.
 </li>
 <li>
 The ability to write clear, readable code that follows a logical structure.
 </li>
 <li>
 Familiarity with the command line and basic file management.
 </li>
 <li>
 Good written communication skills for remote coordination.
 </li>
 <li>
 A willingness to learn how to handle data and move it between different systems.
 </li>
 <li>
 An interest in building practical tools for business operations.
 </li>
 <li>
 A reliable internet connection and the ability to manage your own schedule in a remote setting.
 </li>
 
 
 </ul>
 
 Helpful background
 
 
 While we do not expect you to have professional experience yet, it is helpful if you have worked on some personal projects or university assignments using specific tools. Any experience with the following will help you get up to speed faster:
 <ul>
 <li>
 Basic familiarity with React or another modern JavaScript framework.
 </li>
 <li>
 Knowledge of Node.js and how to run simple scripts.
 </li>
 <li>
 Experience using Git and GitHub to manage your code versions.
 </li>
 <li>
 A basic understanding of how databases like Postgres work.
 </li>
 <li>
 Curiosity about how APIs connect different software tools together.
 </li>
 <li>
 Experience following a technical tutorial to build a functional web application.
 </li>
 
 
 </ul>
 
 Working at Pixel Systems
 
 
 Working here is different from working at a large corporation. We do not have layers of middle management or complex internal politics. You will work directly with senior developers who have been building software for a long time. Because we are remote, we focus on results rather than hours spent at a desk. We ship work that solves real problems for our clients, like the established London business we are currently supporting.
 
 You will learn the practical side of software development: how to write code that is easy for others to read, how to document your work so a client can use it, and how to fix things when they break. We are a quiet, productive team that values honesty and straightforwardness. If you want to learn how to build software that business owners actually rely on, you will find plenty of opportunities here.
 
 At Pixel Systems, we take pride in being the team that handles the difficult, unglamorous work that makes a business successful. We do not believe in drama or overcomplicating our processes. We just want to build things that work. This internship is a chance to see how a small, senior team operates and to gain experience that is applicable to the real world of software development.
 
 ,workplace_type:
</div>

Web Developer Intern

Pure Human Resources

<div>Senior Full Stack Developer<div>
England (Remote)
 
Full time, permanent
 
Salary: &pound;55,000 &ndash; &pound;70,000 (DOE)
 
Competitive benefits package</div><div>
Building technology that makes a real difference in healthcare</div><div>
Our client, Holmusk, is a global health technology company transforming behavioural health and chronic disease care through data, digital innovation and evidence-driven medicine.</div><div>
Following continued growth, they are seeking an experienced Senior Full Stack Developer to join their UK team and play a key role in the development of healthcare applications used within Mental Health Trusts across the UK.</div><div>
This is an opportunity to combine technical excellence with meaningful impact, helping to build secure, scalable and compliant software that supports frontline healthcare professionals.</div><div>
Senior Full Stack Developer, the role:</div><div><ul><li>Design, develop and maintain scalable full stack applications using C#/.NET and React
</li><li>Build responsive, high-performance user interfaces using modern JavaScript, HTML and CSS
</li><li>Contribute to architecture decisions, ensuring scalability, maintainability and security
</li><li>Develop and maintain automated testing frameworks across unit, integration and end-to-end testing
</li><li>Drive engineering best practice through code reviews and quality standards
</li><li>Work within a regulated software environment with a strong focus on quality and compliance
</li><li>Collaborate closely with a small, highly skilled development team
</li><li>Support CI/CD pipelines and cloud-based deployment processes
</li><li>Troubleshoot, optimise and improve performance across applications and services
</li><li>Contribute to documentation, traceability and technical governance requirements
</li><li>Support future growth of the engineering team through mentoring and knowledge sharing</li></ul></div><div>
Senior Full Stack Developer, the person:</div><div><ul><li>Strong commercial experience with C# /.NET Core /.NET 6+
</li><li>Strong React.js and modern JavaScript development experience
</li><li>Solid understanding of REST APIs, microservices and distributed systems
</li><li>Experience with design patterns and frameworks such as Entity Framework, MVC, MVVM or CQRS
</li><li>Proven experience implementing automated testing and quality assurance practices
</li><li>Experience with Azure cloud environments
</li><li>Strong knowledge of Git, CI/CD pipelines and DevOps principles
</li><li>Experience working with MS SQL and relational databases
</li><li>Understanding of secure coding principles and data protection requirements
</li><li>Experience using AI tools to improve development efficiency</li></ul></div><div>
Senior Full Stack Developer, the benefits:</div><div><ul><li>Opportunity to shape the development of a software solution that directly supports mental health service delivery
</li><li>Fully remote working
</li><li>Collaborative, flexible and supportive working culture
</li><li>Exposure to innovative healthcare technology at scale
</li><li>Opportunity to work with modern cloud, AI and digital health solutions
</li><li>Generous holiday allowance plus additional company days for national holidays
</li><li>Annual performance-based company bonus
</li><li>Ongoing professional development and career growth opportunities</li></ul></div><div>
Pure Human Resources Limited works in partnership with Holmusk in providing Recruitment support. No applications from agencies please.</div></div>

Senior Full Stack Developer

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