17 of 17 Contract API Development Jobs in the UK excluding London

as a specialist consultant, working on a wide array of complex projects across multiple industries. The Role: We are looking for a Software Engineer with a strong foundation in API development and C# to join our data engineering team in a highly regulated industry. In this role, youll be instrumental in designing and building scalable, secure software systems … with strict regulatory standards. Were seeking candidates with over 5 years of relevant experience, a solid understanding of software system design, and a strong command of C# and modern API development patterns. A background in working with data systems, cloud integrations, and secure, large-scale applications will be highly advantageous. Responsibilities: Design, develop, and maintain scalable APIs and … decisions, and system documentation. Stay current with best practices and emerging technologies in software engineering and data systems. Skills & Experience: You will have the following skills or proven experience: API Development: Proven experience designing and building RESTful APIs and services at scale. Experience with authentication, authorization, and secure API communication (OAuth2, JWT, etc.). Familiarity with API More ❯

Contract Developer - Node.js development, REST API design, and SIP-based communications Duration: 3 months (Outside IR35) Location: Bracknell/Hybrid Contract Developer with deep expertise in Node.js development, REST API design, and SIP-based communications. This role is crucial for supporting the migration of legacy device management, call control, and configuration workflows to a secure, scalable … Cloud Migration & Refactoring: Analyse existing applications to identify dependencies on on-prem infrastructure and design cloud-native solutions. Refactor services to enhance scalability and reliability in the cloud. Service & API Development: Develop and maintain secure REST APIs for functionalities such as SIP authentication, call control, and real-time data interactions. Real-Time Communication Integration: Implement and maintain robust … Compliance: Oversee the migration of sensitive data to secure cloud storage solutions, ensuring compliance with GDPR and other regulatory standards. Required Skills & Qualifications: Experience: Minimum 3 years of backend development experience using Node.js/Express. Proven track record in building and deploying REST APIs. Experience with SIP/TLS integration and managing real-time communications. Familiarity with cloud services More ❯

Contract Developer - Node.js development, REST API design, and SIP-based communications Duration: 3 months (Outside IR35) Location: Bracknell/Hybrid Contract Developer with deep expertise in Node.js development, REST API design, and SIP-based communications. This role is crucial for supporting the migration of legacy device management, call control, and configuration workflows to a secure, scalable … Cloud Migration & Refactoring: Analyse existing applications to identify dependencies on on-prem infrastructure and design cloud-native solutions. Refactor services to enhance scalability and reliability in the cloud. Service & API Development: Develop and maintain secure REST APIs for functionalities such as SIP authentication, call control, and real-time data interactions. Real-Time Communication Integration: Implement and maintain robust … Compliance: Oversee the migration of sensitive data to secure cloud storage solutions, ensuring compliance with GDPR and other regulatory standards. Required Skills & Qualifications: Experience: Minimum 3 years of backend development experience using Node.js/Express. Proven track record in building and deploying REST APIs. Experience with SIP/TLS integration and managing real-time communications. Familiarity with cloud services More ❯

goals. ? Ensure product & service quality following internal and external standards. ?? Improve software processes & tooling for efficiency. ?? Ensure technical standards, documentation & processes are consistently applied. ?? Assist in refining requirements into development backlogs and demo working software in iteration reviews. ?? Support and sustain CI/CD pipelines using tools like Bitbucket, Jenkins, and Artifactory. ?? Write and lead software designs , presenting clear … solutions and guiding developers. ?? Review code & resolve issues across the project lifecycle. ?? Support technical sales & effort estimation for new initiatives. ? Essential Experience ?? 5+ years C#/.NET development (including Android). ?? 5+ years REST/RESTful API development . ?? Strong OOP, UML, Design Patterns, SOLID principles. ?? 5+ years in Agile (Scrum, Kanban, agile mindset) . ?? Hands-on … experience with SonarQube & addressing security vulnerabilities. ?? CI & automated testing (TDD/BDD). ?? Unit testing & coverage tools (e.g., NUnit, SonarQube, AltCover). ? Desired Experience ?? Embedded software development knowledge. ?? Android development (Xamarin is a plus). ??? Windows CE/Embedded & .NET Compact Framework. ?? C/C++ on Linux (embedded). ?? JavaScript technologies. ??? Database technologies. ?? JIRA for workflow management. ??? Source More ❯

Axway API Developer + 6 month initial contract + Full remote + 650 to 690 per day + SC Cleared role Key Skills: + Axway API Development/Administration + SC Clearance Responsibilities Designing, developing and deploying of Axway policies and containers using Axway Policy Studio v7.7 Working with DevOps toolset for develop and maintain Automated Testing … and Code Deployment Provide Assistance to Axway support team to resolve technical issues Administrating the Axway Environment, using Axway Policy Studio, Axway API Manager, Cassandra and API Gateway for Deployment of Axway Patches, monitor capacity, providing service improvements Liaise with customers to define project requirements, document and design solutions Knowledge of: SFTP HTTPS SSL/TLS oAuth JSON More ❯

Axway API Developer + 6 month initial contract + Full remote + £650 to £690 per day + SC Cleared role Key Skills: + Axway API Development/Administration + SC Clearance Responsibilities Designing, developing and deploying of Axway policies and containers using Axway Policy Studio v7.7 Working with DevOps toolset for develop and maintain Automated Testing … and Code Deployment Provide Assistance to Axway support team to resolve technical issues Administrating the Axway Environment, using Axway Policy Studio, Axway API Manager, Cassandra and API Gateway for Deployment of Axway Patches, monitor capacity, providing service improvements Liaise with customers to define project requirements, document and design solutions Knowledge of: SFTP HTTPS SSL/TLS oAuth JSON More ❯

technical ownership are valued. The role will involve building, optimising, and scaling backend systems, APIs, and services, while contributing to an agile delivery team. Key Skills Required: Strong Python development experience FastAPI MySQL Azure REST API development Microservices Agile methodologies TDD (Test-Driven Development) Desirable Skills: Ansible Docker Kubernetes Database experience across SQL, MongoDB, and Redis More ❯

and a proven track record, who ideally has some knowledge and experience of the commodity or financial trading sectors. Key Responsibilities: Full stack developer with around 8-10 years development experience, working in a agile development team to deliver robust enterprise-wide solutions utilising industry standard practices Design, develop, enhance and maintain applications using agreed coding standards and … quality targets. Ensure quality via code reviews and thorough unit testing. Liaise with immediate scrum team, other scrum/project teams, line manager and development lead to ensure accurate and complete delivery. Contribute to the development and implementation of software development best practices within the organisation. Writing clean and efficient code using relevant programming languages to implement … the designed features and functionality. Key Competencies & Skills: Knowledge of oil, wet bulk or energy trading and risk management business Software Development Methodologies: Understanding of Agile development practices and project management tools Communication Skills: Effective communication to collaborate with stakeholders, gather requirements, and explain technical concepts Problem-solving Skills: Ability to troubleshoot technical issues and identify creative solutions More ❯

. This is an exciting opportunity to build impactful systems in a regulated environment while working on cutting-edge technologies. Key Responsibilities Design, develop, and maintain highly available REST API services and Front End clients using Python, Golang, Docker, and Cloud-Native services . Implement and manage database schema changes using Liquibase , ensuring compliance with audit and security standards. … Required Qualifications & Experience Bachelor's/Master's degree in Computer Science or equivalent industry experience. Strong software engineering background with exposure to infrastructure. 5+ years of hands-on development experience with large-scale, distributed systems . Proficiency in Python, Golang, PostgreSQL . Experience with Liquibase or similar database change/versioning tools. Hands-on expertise with AWS/… Proven ability to deliver complex projects in regulated environments. Essential Skills Demonstrable expertise in: Public Cloud (AWS/GCP) Linux systems Relational & NoSQL databases Integration services (messaging, streaming) RESTful API development Containerization (Docker, Kubernetes, serverless functions) Microservices, distributed tracing Enterprise logging, monitoring & alerting frameworks (ELK, Splunk, Prometheus, Grafana) Programming expertise in Python & Golang . Good understanding of cryptography More ❯

Communicate AI capabilities and set realistic expectations. Essential Skills & Experience Strong expertise in GenAI, NLP, and ML. Hands-on experience with LLMs/SLMs, Python, Java, SQL/NoSQL. API development, web scraping, data integration. On-prem AI model deployment, open-source frameworks (e.g. Hugging Face, LangChain). Strong consulting and communication skills. Preferred Knowledge of data structures More ❯

Skills: 5 + years commercial experience in GenAI, NLP, and Machine Learning. Proven experience in creating, training, and fine-tuning LLMs/SLMs. 5+ years hands-on skills Python development skills. Integrating with SQL/NoSQL databases. Experience with API development, web scraping/crawling, and data integration. Practical exposure to on premise AI model deployment and More ❯

in GenAI, NLP, and Machine Learning · Have 3 years + experience in AI positions · Hold previous hands-on experience with Python, Java, SQL/NoSQL databases · Have experience with API development, web scraping/crawling, and data integration · Practical exposure to on premise AI model deployment and open-source AI frameworks · Be consultative · Ability to assess AI tools More ❯

within AI roles Have experience in Machine Learning, NLP, and GenAI Be proficient in Python and data libraries Maintain previous experience with SQL/NoSQL databases Have experience in API development/integrationAbility to analyze model performance In return our client offers outstanding benefits and a great working environment. Please apply for more opportunity on this AI Engineering More ❯

with cross functional teams to design and implement leading edge 3D graphics solutions for gamers and customers, and play a pivotal role in the innovation of GPU drivers and API development, and have technical ownership on key sections of projects. Your Role As a Senior Graphics Engineer, you will enjoy developing and optimising real time rendering pipelines to … standard features and extensions for Open GL ES and Vulkan. Your role as Senior Graphics Engineer will also see you being heavily involved in performance optimization and analysis, middleware development, and hardware integration. This will involve enhancing GPU drivers, analysing, graphic workloads, creating graphic based middleware libraries, as well as defining and integrating GPU requirements into the operating system. … innovative and collaborative environment. Working Pattern: Hybrid Determination: Inside IR35 About You Expert-level of proficiency in C and C++ programming languages Proven expertise in real-time embedded software development for mobile devices. Excellent knowledge of computer graphics, including OpenGL, OpenGL ES, Vulkan, or DirectX APIs. Deep understanding of graphics pipelines and modern mobile GPU architectures. Excellent system-level More ❯

and expanding the current automation service, which leverages OCR, Object Detection and LLM AI in order to automate some internal applications. You will bring a strong blend of Python development expertise, coupled with commercial exposure to modern AI technology and practices. Specifically, you will have a strong technical foundation across a blend of Large Language Models (LLMs), machine learning … fine tuning Machine Learning & AI Libraries including: Transformers/Hugging Face Python expertise with an understanding of object-oriented programming Pandas, PyTorch, Numpy SQLAlchemy, Boto3 AWS - Lambda, S3, CDK API Development Design and implementation of AI/ML solutions Excellent communicator Strong stakeholder management Keen collaborator The above is not exhaustive. For further information on this opportunity please More ❯

Axway API Developer (SC Cleared) 6 months contract Inside IR35 £500 to £650 a day Remote Working (UK based) A top-tier defense organization is looking for an experienced Axway API Developer/Administrator to join their team on a 6-month contract. You will contribute to a large government gateway project, and active SC clearance is required. … liaising with stakeholders to define requirements and design comprehensive solutions. To be successful in this role, you should have a solid foundation in: Axway's core products: Policy Studio, API Gateway, and API Manager. Key communication protocols: SFTP, HTTPS, SSL/TLS, and oAuth. Data and messaging formats: JSON, XML, SOAP, and REST. Linux scripting and environments. Using … DevOps toolsets to automate testing and deployments. 6 months contract Inside IR35 - Remote Working - £500 to £650 a day If you are an experienced professional with a background in API, MFT, or secure file transfers, this could be the perfect opportunity for you. If the above sounds of interest to you then please apply directly to the AD or More ❯

requirements and iterate quickly on solutions. Implement testing frameworks, version control, and data validation processes. Integrate with market data, storage systems, and reporting platforms. Required Skills 5+ years' Python development experience, ideally within trading, risk, or financial services. Strong background with Pandas, NumPy, and data science libraries . Hands-on experience with Flask or FastAPI for API development. More ❯