backend developer

CodeNinja

<div>About CodeNinja
CodeNinja is a next-generation technology consulting firm specialising in AI-powered transformation, enterprise software delivery, and Quality Engineering. Headquartered in the Gulf region and operating across the MENA, South Asia, and global markets, CodeNinja partners with Tier-1 banks, government entities, and large enterprises to design, build, and run mission-critical technology programs.
With deep expertise in QA transformation, test automation, DevOps modernisation, and AI/ML engineering, CodeNinja's teams combine global delivery standards with in-market contextual knowledge &mdash; ensuring outcomes that are compliant, scalable, and commercially aligned with client objectives.
For the Client's Test Management Enablement &amp; Automation engagement, CodeNinja brings a dedicated 12-person specialist team spanning Test Management, Automation Engineering, AI/ML, and Performance Testing &mdash; all governed under a structured 20-week program delivery framework.
About the Role
We are looking for a highly skilled Senior Java Backend Developer with strong expertise in building scalable microservices and APIs. The ideal candidate will have hands-on experience with Spring Boot or Quarkus and API management using IBM API Connect (APIC). Experience in the Open Banking domain will be considered a strong advantage.
Key Responsibilities<ul><li>
Design, develop, and maintain scalable microservices using Spring Boot and/ Quarkus</li><li>
Build, publish, and manage APIs using IBM API Connect (APIC)</li><li>
Ensure high performance, security, and scalability of backend systems and APIs</li><li>
Collaborate with cross-functional teams including product, QA, and DevOps</li><li>
Troubleshoot, debug, and resolve production issues efficiently</li><li>
Follow best practices for clean code, testing, and system design</li><li>
Containerize applications using Docker and deploy on Kubernetes/OpenShift</li><li>
Implement authentication/authorization using OAuth2/JWT standards</li><li>
Write unit, integration, and contract tests</li><li>
Collaborate with DevOps on CI/CD pipelines</li><li>
Participate in code reviews, design discussions, Agile ceremonies</li><li>
Monitor, troubleshoot, and optimize microservices performance in production</li></ul> 

Requirements 
<ul><li>
5+ years of experience in Java backend development</li><li>
Strong hands-on experience with Spring Boot and Quarkus</li><li>
Solid understanding of microservices architecture</li><li>
Familiarity with API security and performance optimization</li><li>
Java 11+ specifically (not just &quot;Java backend development&quot;)</li><li>
OpenShift alongside Kubernetes (currently only Docker/K8s is nice-to-have &mdash; should move to required)</li><li>
Proficiency with Git and CI/CD tools (Jenkins, GitLab CI)</li><li>
Working knowledge of SQL/NoSQL databases</li></ul>
Nice to Have<ul><li>
Experience in Open Banking or financial services domain</li><li>
Knowledge of OAuth2, JWT authentication</li><li>
Hands-on experience with Docker, Kubernetes, and cloud platforms (AWS, Azure, or GCP)</li><li>
Apache Kafka or other messaging/event-streaming platforms</li><li>
Observability tools &mdash; Prometheus, Grafana, ELK</li></ul>
Why Join Us<ul><li>
Opportunity to work on scalable, enterprise-level systems</li><li>
Collaborative and growth-focused environment</li><li>
Exposure to modern technologies and architecture</li></ul>
Disclaimer
This job description outlines the primary responsibilities and qualifications for the role at the time of posting. It is not exhaustive and may evolve in line with business needs and project requirements. CodeNinja reserves the right to modify role scope as the engagement progresses.
All candidates will be subject to standard background verification. Onsite positions require compliance with the client's site access, security, and NDA policies. CodeNinja is an equal opportunity employer and welcomes applications from all qualified individuals regardless of background.</div>

Senior Java Backend Developer (Spring Boot / Quarkus / API)

YO IT Consulting

<div>
 
 Job Description
 
 
 
 
 Job Title:
 
 Java Developer
 
 
 
 Job Type:
 
 Contract
 
 
 
 Location:
 
 Remote
 
 
 
 Job Summary:
 
 As a Java Developer, you'll apply your expertise to help train next-generation AI systems. Your work will shape how models learn, reason, and perform through high-quality, real-world input. No prior experience in AI is required &mdash; your domain knowledge is what matters.
 
 
 
 Key Responsibilities
 
 
 
 <ul>
 <li>
 Design, develop, and maintain scalable backend systems using Java and Spring Boot.
 </li>
 <li>
 Architect robust microservices solutions to support complex application requirements.
 </li>
 <li>
 Collaborate with the customer's team to review technical specifications and deliver high-quality code.
 </li>
 <li>
 Contribute expert insights to improve application performance, reliability, and security.
 </li>
 <li>
 Participate in code reviews and provide constructive feedback to peers.
 </li>
 <li>
 Document technical processes and solutions with clear, concise written communication.
 </li>
 <li>
 Troubleshoot, debug, and optimize backend systems as needed.
 
 
 </li>
 </ul>
 
 Required Skills And Qualifications
 
 
 
 <ul>
 <li>
 Expert proficiency in Java programming language.
 </li>
 <li>
 Hands-on experience with Spring Boot framework for backend development.
 </li>
 <li>
 Strong knowledge of microservices architecture and design principles.
 </li>
 <li>
 Demonstrated ability to write clean, maintainable, and efficient code.
 </li>
 <li>
 Exceptional written and verbal communication skills, with a keen attention to detail.
 </li>
 <li>
 Experience collaborating with remote teams in a fast-paced environment.
 </li>
 <li>
 Solid understanding of REST APIs, data structures, and backend best practices.
 
 
 </li>
 </ul>
 
 Preferred Qualifications
 
 
 
 <ul>
 <li>
 Exposure to cloud platforms such as AWS, Azure, or Google Cloud.
 </li>
 <li>
 Prior experience working on AI-driven or data-intensive projects.
 </li>
 <li>
 Background in high-availability or distributed systems.
 </li>
 </ul>
</div>

Java Developer - Remote

NSG Geospatial Services

<div>
 
 
 Key Responsibilities
 
 
 <ul>
 <li>
 Design, develop, and maintain scalable backend microservices using
 
 Python
 
 and
 
 Node.js
 
 .
 </li>
 <li>
 Design, develop, and maintain modern frontend applications using
 
 React
 
 and
 
 Vue.js
 
 .
 </li>
 <li>
 Own software features throughout the entire development lifecycle, from technical design to production support.
 </li>
 <li>
 Lead technical design discussions and contribute to overall system architecture and engineering best practices.
 </li>
 <li>
 Build reusable, maintainable, and well-structured frontend components following modern development standards.
 </li>
 <li>
 Design and implement secure, scalable, and maintainable
 
 REST APIs
 
 for frontend and third-party integrations.
 </li>
 <li>
 Collaborate closely with Frontend, Backend, QA, UX/UI, and Product teams to define technical solutions and ensure seamless integration.
 </li>
 <li>
 Develop and maintain real-time features and asynchronous communication where required.
 </li>
 <li>
 Implement secure authentication, authorization, and application security best practices.
 </li>
 <li>
 Optimize backend and frontend performance, ensuring scalability, responsiveness, and reliability.
 </li>
 <li>
 Design efficient data access patterns, caching strategies, and application state management.
 </li>
 <li>
 Write clean, maintainable, well-tested, and well-documented code.
 </li>
 <li>
 Review code, enforce engineering standards, and mentor other developers through technical guidance and constructive feedback.
 </li>
 <li>
 Troubleshoot production issues, identify root causes, and implement reliable long-term solutions.
 </li>
 <li>
 Participate in technical planning, estimation, architecture reviews, and technology selection.
 </li>
 <li>
 Contribute to technical documentation, coding standards, and continuous improvement of engineering processes.
 </li>
 </ul>
 
 
 
 
 
 Preferred Experience
 
 
 <ul>
 <li>
 Experience designing and developing distributed systems based on
 
 Microservices Architecture
 
 .
 </li>
 <li>
 Experience with asynchronous messaging and event-driven architectures.
 </li>
 <li>
 Experience working with
 
 SQL
 
 and
 
 NoSQL
 
 databases.
 </li>
 <li>
 Familiarity with API documentation standards such as
 
 OpenAPI (Swagger)
 
 .
 </li>
 <li>
 Experience developing enterprise-scale web applications with a strong focus on performance, scalability, and maintainability
 </li>
 </ul>
</div>

Full Stack Developer

IntelliSense.io

<div><h1 class="jobSectionHeader">Join IntelliSense.io and help build the future of Scientific Intelligence</h1>
Are you passionate about building scalable data systems and solving complex technical challenges? We're looking for a Backend Engineer to join our dynamic, global team.
At IntelliSense.io, we're pioneering Objective AI (ODAI), combining fundamental physics with AI to understand and characterise the physical world. Our platform delivers high-value decision recommendations, acting as role-specific co-pilots that augment human intelligence or enable autonomous systems. In short, we're building the brains behind smarter, more efficient operations.<h2 class="jobSectionHeader">
What you'll be working on</h2>
As a Backend Engineer, you'll design and implement robust data solutions that meet both internal and client needs. You'll also play a key role in shaping how we build software, setting standards, and helping teams deliver high-quality work.
Key responsibilities include:<ul><li>
Extracting requirements, designing, developing, and testing software applications</li><li>
Liaising with different teams, including QA team and data scientists to ensure the best processes are used to create the best outcome of a product</li><li>
Troubleshooting and resolving issues related to applications and services</li><li>
Identifying bugs in the microservices and proposing solutions to fix them</li><li>
Collaborating with the data science team to integrate equipment/process models into software components and services</li><li>
Applying principles, best practices, and techniques of engineering, mathematics, and computer science to software development</li><li>
Defining and implementing Unit Test codes, and providing test coverage for the developed software components or services</li><li>
Writing and maintaining documentation for all services and their dependencies</li></ul><h4 class="jobSectionHeader">
What we're looking for</h4><ul><li>
Experience in software engineering, with a strong focus on data systems</li><li>
Proficiency in Java and Node.js</li><li>
SQL skills and experience with both relational and NoSQL databases</li><li>
Hands-on experience with message queues (e.g. NATS, Pub/Sub)</li><li>
Experience building web services using REST and SOAP</li><li>
Working knowledge of Kubernetes and Docker</li><li>
Excellent communication skills and confidence working in distributed teams</li><li>
A degree in Computer Science (or a related field), or equivalent practical experience</li><li>
Fluency in English and Arabic languages</li></ul><h4 class="jobSectionHeader">
Bonus points for</h4><ul><li>
Familiarity with Python</li></ul><h2 class="jobSectionHeader">
Why join us?</h2><ul><li>
Opportunity to work on cutting-edge technology and meaningful data challenges</li><li>
A collaborative, global team of talented engineers and domain experts</li><li>
A continuous learning environment with real opportunities to grow and lead</li></ul><h2 class="jobSectionHeader">
Location</h2>
This role is remote but must be based in Saudi Arabia.<h2 class="jobSectionHeader">
Apply today</h2>
We actively encourage applications from people of all backgrounds. If this role excites you, even if you don't meet every requirement, we'd love to hear from you. 
You belong here. Let's build something extraordinary together.</div>

Backend Engineer

MASTER-WORKS

<div>Our subsidiary (First Tech) is seeking a highly experienced GIS Full Stack. Net, Developer with proven experience in delivering enterprise-grade web applications, geospatial intelligence platforms, and workflow automation solutions, preferably for government organizations.
Key Responsibilities<ul><li>
Design, develop, and maintain secure, scalable enterprise web applications using .NET technologies.</li><li>
Translate business requirements into technical solutions and participate in the full software development lifecycle (SDLC).</li><li>
Develop and integrate RESTful APIs, backend services, and responsive Single Page Applications (SPAs).</li><li>
Build and maintain GIS applications and spatial data solutions using Esri technologies.</li><li>
Design, optimize, and support SQL Server databases and integrate with Oracle and MySQL where required.</li><li>
Implement secure authentication and authorization using modern security frameworks and protocols.</li><li>
Develop reports and workflow automation solutions to support business processes.</li><li>
Collaborate with cross-functional teams in an Agile environment and participate in code reviews, testing, deployment, and production support.</li><li>
Ensure software quality, performance, security, and compliance with development best practices.</li></ul> 
Requirements 
Core Experience<ul><li>Proven experience in designing, developing, and supporting mission-critical enterprise web applications.</li><li>Strong ability to translate complex business requirements into scalable and maintainable software solutions.</li><li>Experience leading development activities throughout the full software development lifecycle, including architecture, implementation, API integration, testing, deployment, and production support.</li><li>Experience collaborating effectively with cross-functional teams using Agile methodologies.</li></ul>
Backend Development<ul><li>Strong hands-on experience with:</li><li>.NET Core</li><li>ASP.NET Core</li><li>ASP.NET MVC Core</li><li>ASP.NET MVC 5</li><li>C#</li><li>RESTful Web APIs</li><li>WCF (SOAP) Services</li><li>Entity Framework</li><li>LINQ</li><li>Experience designing and implementing clean, scalable application architectures.</li><li>Experience documenting APIs using Swagger.</li></ul>
Frontend Development<ul><li>Strong experience with:</li><li>Angular</li><li>React</li><li>TypeScript</li><li>JavaScript (ES6+)</li><li>HTML5</li><li>CSS3</li><li>Bootstrap 5</li><li>jQuery</li><li>Vanilla JavaScript</li><li>Experience developing responsive web applications and Single Page Applications (SPA).</li></ul>
GIS &amp; Esri Technologies<ul><li>Proven experience building GIS applications using Esri APIs and SDKs.</li><li>Experience with:</li><li>ArcGIS Web AppBuilder</li><li>ArcGIS Experience Builder</li><li>ArcGIS Dashboards</li><li>ArcGIS Portal</li><li>ArcGIS Desktop (ArcMap &amp; ArcGIS Pro)</li><li>Survey123</li><li>Experience creating and managing:</li><li>Web Maps</li><li>Geodatabases</li><li>GIS Dashboards</li><li>Spatial data editing, visualization, and management.</li></ul>
Database<ul><li>Strong experience with Microsoft SQL Server.</li><li>Experience working with Oracle and MySQL databases.</li></ul>
Security<ul><li>Experience implementing application security using:</li><li>IdentityServer for ASP.NET Core</li><li>OpenID Connect</li><li>OAuth 2.0</li><li>JSON Web Tokens (JWT)</li></ul>
Reporting<ul><li>Experience using Telerik Report Designer.</li></ul>
Workflow Automation<ul><li>Experience with HighGear workflow engine for rule-based process automation and system integration.</li></ul>
Development Tools &amp; Practices<ul><li>Hands-on experience using:</li><li>Git</li><li>GitHub</li><li>Postman</li></ul>
Strong understanding of:<ul><li>Object-Oriented Programming (OOP)</li><li>Clean Architecture</li><li>Agile development methodology</li></ul> 
Job Location: Client Site.</div>

GIS Full Stack. Net, Developer

MOZN

<div>
 
 
 About Mozn
 
 
 
 
 
 MOZN is a leading Enterprise AI company enabling organizations to make informed decisions in two critical domains: Financial Crime Prevention and Enterprise Knowledge Intelligence.
 
 
 We're a diverse, collaborative team of innovators united by a shared purpose: to build AI that delivers tangible business value, builds trust, and empowers people and organizations with augmented intelligence. Our culture is built on the relentless pursuit of excellence and meaningful impact.
 
 
 If you're passionate about working alongside exceptional talent on world-class AI, and you want the autonomy and runway to do the best work of your career, join us in shaping the future of intelligent enterprises.
 
 
 
 About the role
 
 
 
 
 
 We are looking for a AI Engineer to lead the design, deployment, and optimization of machine learning and generative AI solutions. The role focuses on applying advanced ML techniques to solve real-world challenges across government and enterprise clients in Saudi Arabia.
 
 
 What you'll do
 
 
 
 
 <ul>
 <li>
 Designing, building, and scaling machine learning models and infrastructure
 </li>
 <li>
 Deploying deep learning and generative models into production for public and private sector projects
 </li>
 <li>
 Optimizing ML training and inference for performance, latency, and scalability
 </li>
 <li>
 Monitoring, retraining, and improving deployed ML models
 </li>
 <li>
 Driving consultation efforts, providing expert guidance to client stakeholders
 </li>
 <li>
 Own the end-to-end delivery of AI solutions, including data pipelines, model development, backend services, APIs, integrations, user interfaces, deployment, and operations
 </li>
 <li>
 Design and build data ingestion, transformation, and processing pipelines for structured and unstructured data
 </li>
 <li>
 Develop backend services and APIs to expose AI capabilities securely and reliably
 </li>
 <li>
 Build or contribute to frontend applications, dashboards, and interfaces for AI-powered solutions
 </li>
 <li>
 Integrate AI solutions with enterprise systems, databases, authentication services, and third-party platforms
 
 
 
 </li>
 </ul>
 
 Requirements
 
 
 
 
 <ul>
 <li>
 Bachelor's or master's degree in computer science or related field
 </li>
 <li>
 3-5 years of experience across software engineering, ML engineering, data science, data engineering and generative AI
 </li>
 <li>
 Strong track record of projects across public and private sectors
 </li>
 <li>
 Expertise in Python, TensorFlow, PyTorch, ONNX, and ML deployment frameworks
 </li>
 <li>
 Expertise in containerization and orchestration technologies (Docker, Kubernetes), with hands-on experience in ML lifecycle management (MLflow) and local LLM deployment frameworks (Ollama)
 </li>
 <li>
 Skilled in on-premise infrastructure design and enterprise architecture frameworks, with strong adherence to security and compliance best practices
 </li>
 <li>
 Deep understanding of hardware provisioning for local LLM deployments (GPU, RAM, and storage optimization) and secure network configurations for internal AI services
 </li>
 <li>
 Experience with cloud ML environments (SageMaker, Vertex AI, OCI Data Science)
 </li>
 <li>
 Familiarity with MLOps practices and automation pipelines
 </li>
 <li>
 Strong end-to-end engineering capabilities across AI, data engineering, backend development, APIs, integrations, and application deployment
 </li>
 <li>
 Experience building data ingestion, transformation, and processing pipelines
 </li>
 <li>
 Familiarity with backend frameworks such as FastAPI, Flask, Django, Node.js, or equivalent technologies
 </li>
 <li>
 Experience designing and consuming REST APIs, webhooks, and enterprise integration interfaces
 </li>
 <li>
 Working knowledge of frontend technologies such as React, Next.js, JavaScript, TypeScript, HTML, and CSS
 </li>
 <li>
 Experience integrating AI solutions with databases, enterprise applications, identity and access management systems, and third-party services
 </li>
 <li>
 Ability to independently build functional AI applications from prototype through production
 </li>
 <li>
 Experience effectively using AI-assisted software development tools to accelerate prototyping and delivery
 
 
 
 </li>
 </ul>
 
 Benefits
 
 
 
 
 <ul>
 <li>
 You will be at the forefront of an exciting time for the Middle East, joining a high-growth rocket-ship in an exciting space
 </li>
 </ul>
 <ul>
 <li>
 You will be given a lot of responsibility and trust. We believe that the best results come when the people responsible for a function are given the freedom to do what they think is best
 </li>
 </ul>
 <ul>
 <li>
 The fundamentals will be taken care of: competitive compensation, top-tier health insurance, and an enabling culture so that you can focus on what you do best
 </li>
 </ul>
 <ul>
 <li>
 You will enjoy a fun and dynamic workplace working alongside some of the greatest minds in AI
 </li>
 </ul>
 <ul>
 <li>
 We believe strength lies in difference, embracing all for who they are and empowered to be the best version of themselves
 </li>
 </ul>
</div>

AI Engineer

Unique Closets

Job SummaryWe are looking for a skilled Software Developer to join our team. The ideal candidate will be responsible for developing, testing, and maintaining software applications while collaborating with internal teams to deliver efficient and reliable solutions.Key Responsibilities<ul><li>Develop and maintain web or software applications.</li><li>Write clean, efficient, and scalable code.</li><li>Troubleshoot, debug, and improve existing systems.</li><li>Collaborate with cross-functional teams on project requirements.</li><li>Participate in testing and deployment activities.</li></ul>Qualifications<ul><li>Bachelor&rsquo;s degree or Diploma in Computer Science, Software Engineering, or a related field.</li><li>Experience in software development is preferred.</li><li>Knowledge of programming languages such as Java, C#, Python, JavaScript, or PHP.</li><li>Strong problem-solving and analytical skills.</li><li>Good communication skills and ability to work in a team.</li><li>Any nationality may apply. Candidates currently residing in Saudi Arabia are preferred.</li></ul>How to ApplyInterested candidates are requested to send their updated CV directly via WhatsApp to:+966 55 926 5760Please mention &ldquo;Software Developer&rdquo; in your message.Work Location: In person

Software Developer

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