22 of 22 Contract API Development Jobs

explore the next generation of intelligent applications. What you’ll be doing Build and deploy custom GenAI applications using modern cloud tech (AWS, Python, CI/CD). Own API development, database design, and infrastructure deployment via Terraform or CloudFormation. Collaborate with data science teams to integrate AI models and APIs (AWS Bedrock, LangGraph, Azure GPT, etc.). … . Work in agile sprints, joining daily stand-ups and planning sessions. What we’re looking for Git AWS services (including Terraform/Cloud Formation) CI/CD pipelines API development in Python SQL and NoSQL databases Docker containers Some familiarity (e.g. awareness and has used them before) with Generative AI tools e.g. AWS Bedrock, Strands, LangGraph, Azure More ❯

Work With: Our client is a leading global technology and engineering solutions company, delivering next-generation digital transformation initiatives. You will work as part of a high-performing Agile development team focused on building a credit decisioning engine powered by scalable microservices and cloud-native solutions. About the Role: As a Java Fullstack Engineer , you will play a pivotal … and frontend features focused on performance and reliability. Work closely with architects and product owners to define and implement technical solutions aligned with business goals. Required Skills & Experience: Backend Development: 8–15 years of experience with Java, Spring Boot , and microservices architecture . Java 17: Hands-on experience is mandatory . DevOps & Cloud: Proven experience with GCP , AWS , or … Azure , and familiarity with CI/CD pipelines . API Development: Expertise in RESTful API design and development. Frontend: Working knowledge of ReactJS or Angular . Testing: Strong background in automated testing , including JUnit . Mindset: Excellent communication skills and a commitment to continuous learning in a collaborative Agile environment. Good to Have: Experience with GCP Data More ❯

desirable Your main responsibility will be to deliver clean, maintainable, and well-tested code that adheres to SOLID principles. You will work collaboratively across Quality Assurance, DevOps, and other development teams, sharing knowledge, supporting onboarding, and contributing to code reviews. Key Responsibilities Deliver high-quality, maintainable code and development outcomes. Manage data exchange between backend services, front-end … clear code comments. Ensure compliance with quality standards, including automated testing and code reviews. Address non-functional requirements such as performance, monitoring, and operational support. Support releases through all development environments, maintaining quality and reliability. Contribute to skill development and technology adoption within the team. Present technical concepts in demos and participate in user feedback sessions. Provide accurate … RAML, REST APIs, flow control, and error handling. Hands-on experience with the Anypoint Platform (CloudHub, VPC, VPN, DLB, firewalls, and cloud technologies). Securing and managing APIs using API Manager. Developing frameworks for error handling and logging. Managing the API development lifecycle from design to governance and management. Working with batch message processing, Salesforce, file, and More ❯

reused. You'll be part of a small, agile, multi-disciplinary team working on open data platforms and services that make a real difference. This is a hands-on development role with strategic influence, where you'll help shape architecture, engineering practices, and delivery standards across a growing programme team of 60+ people. Key Responsibilities Design, build, and maintain … Ensure code quality, documentation, and maintainability Align delivery with recognised standards including the Technology Code of Practice and Service Standard Essential Skills & Experience 4+ years of experience in software development Strong proficiency in Ruby (Python is a bonus) Experience with microservices or service-oriented architecture Skilled in writing clean, well-documented code and taking ownership of the development process Comfortable working in agile , cross-functional teams Familiarity with: Docker & Kubernetes Git & version control API development (REST, GraphQL) Cloud deployment Open data platforms or search technologies Desirable Experience working with or within government or public sector teams Background in open data , civic tech, or mission-driven organisations Working Arrangements Base location: London or Manchester (2 days More ❯

Manchester (3 days per week in office, Tuesday–Thursday), the successful candidate will be responsible for designing, developing, and maintaining modern cloud-based systems. You will work across backend development, DevOps, and infrastructure as code, collaborating closely with global teams in Australia, the U.S., and locally in Manchester. Key Responsibilities: Backend Development (50%) Design, develop, and enhance backend … requirements into technical solutions in collaboration with Product Owners. DevOps/Cloud Operations (40%) Work with AWS to manage, optimise, and secure cloud infrastructure. Deploy and maintain services across development, testing, and production environments. Detect and prevent security threats, including account takeover attempts. Drive continuous improvement in technical standards, tools, and processes. Infrastructure as Code (10%) Deploy and manage … architects and global teams to implement reusable and maintainable infrastructure components. Required Qualifications: Strong expertise in cloud computing and services (AWS experience preferred). Proficiency in TypeScript and REST API development ; experience with NestJS preferred. Deep understanding of cloud security principles , including IAM, networking, and encryption. Experience with web services and microservices-based architectures . Excellent communication skills More ❯

BPSS to start; active SC required due to timescale of the project Team: 10 direct reports, part of a 60+ programme Experience: 4+ years Essential Skills Technical: Strong Ruby development (primary focus), Python experience desirable Experience across multiple services, particularly data services Docker, Kubernetes, Git/version control API development and integration Agile working practices and adherence … to technical standards Approach: Pride in producing high-quality, well-documented code Ownership of the full development process Collaborative working with user-centered design (UCD) teams Thrives in small, agile, multi-disciplinary teams Key Responsibilities: Develop Ruby-based applications and data services Build and maintain APIs and open data platforms Ensure code is high-quality and well-documented Work … For: Senior Ruby developer with strong focus on code quality Experience working with data services Comfortable working in small, agile teams and collaborating with UCD teams Desirable Skills: Python development Experience in public sector or government projects Knowledge of search technologies and open data platforms Active SC clearance More ❯

operations. You will be instrumental in driving revenue growth, optimizing risk management, enhancing customer experiences, and ensuring regulatory compliance on a global scale. Key Responsibilities End-to-End Model Development: Lead the entire ML lifecyclefrom problem framing, data exploration, and feature engineering to model training, validation, deployment, and monitoring in production environments. Advanced Algorithm Design: Develop and implement sophisticated … Regulatory Compliance & Governance: Ensure all models are developed in line with internal Model Risk Management policies and external regulatory requirements (e.g., SR 11-7, GDPR, PSD2). Document model development processes thoroughly for internal and external audits. Innovation: Stay abreast of the latest academic and industry advancements in AI/ML and proactively identify opportunities to apply them within … or conferences. Experience with cloud platforms (AWS SageMaker, Google Vertex AI, Azure ML). Knowledge of graph databases and network analysis techniques. Experience with real-time model inference and API development (e.g., FastAPI, Flask). Personal Attributes Strategic Thinker: Ability to see the "big picture" and align data science projects with business objectives. Exceptional Communicator: Can articulate complex More ❯

BPSS to start; active SC required due to timsecale of the project Team: 10 direct reports, part of a 60+ programme Experience: 4+ years Essential Skills Technical: Strong Python development (primary focus), Ruby experience desirable Experience across multiple services, particularly data services Docker, Kubernetes, Git/version control API development and integration Agile working practices and adherence … to technical standards Approach: Pride in writing high-quality, well-documented code Ownership of the full development process Collaborative working with user-centered design (UCD) teams Thrives in small, agile, multi-disciplinary teams Key Responsibilities: Develop Python-based applications and data services Build and maintain APIs and open data platforms Ensure code is of high quality and well-documented More ❯

infrastructure tasks. The role consists of: Paid onboarding: Initial hours to familiarise yourself with our technology stack, documentation, codebase, and processes Ad-hoc hourly work: Support, bug fixing, feature development, triaging, and emergency assistance as needed The successful candidate will be especially useful to the editorial team in advising on XML-related issues and tasks. Who This Role Suits … stress environment People interested in digital humanities/academic technology Developers who enjoy working across varied technical areas Those comfortable with both maintaining legacy systems and contributing to new development Freelancers who can respond to requests within a reasonable timeframe Responsibilities Assist with maintenance of our current Web UI (Ember-based) and contribute to the new NextJS React frontend … as directed Support the editorial team with content management and XML triage tasks Help with basic backend API tasks under supervision Provide assistance with infrastructure and DevOps tasks as needed Technical Requirements Required: Basic understanding of XML processing and structure Proficiency in HTML5/CSS3 and JavaScript Ability to read and debug code Comfortable working with version control (Git More ❯

experienced Technical Lead (Java) to join a large-scale central government programme , supporting the delivery of high-quality, secure, and scalable digital services. You'll lead technical direction across development teams, ensuring best practice in software engineering, architecture, and delivery. This role requires hands-on Java expertise alongside the ability to mentor engineers and influence technical decisions across multiple … workstreams. Key Responsibilities Provide technical leadership and guidance to software engineering teams Define and implement best practices in software design, coding, testing, and deployment Lead the development of secure and scalable Java-based applications Collaborate closely with Product Managers, Architects, and Delivery Leads to ensure technical alignment Contribute to continuous improvement and innovation within a complex, multi-team environment … with experience designing and building enterprise-scale applications Proven experience as a Tech Lead or Senior Engineer in central government or large public sector programmes Solid understanding of microservices , API development , and integration patterns Experience with cloud environments (AWS, Azure, or similar) Knowledge of CI/CD pipelines , containerisation , and infrastructure as code principles Strong communication and stakeholder More ❯

Cloud Security Engineer (AWS) - Node.js/NestJS and REST API - Authentication (Auth0, Ping Identity) Contract - 12 months, upto £650/day inside IR35 ***Hybrid - 3 days office Leading financial services client is seeking a Senior Cloud Security Engineer and help shape their cybersecurity in a fast-paced, global environment. Key Responsibilities: Design and maintain RESTful APIs and microservices using … Embed DevSecOps best practices across IAM, networking and compliance. Collaborate with Agile teams to deliver high-quality, secure software at scale. Key Skills: Strong Node.js/NestJS and REST API development experience. Skilled in AWS Proficient with IaC, CI/CD (CloudFormation, Terraform) Cloud security principles, including IAM, networking, and encryption If this is of interest and you More ❯

experience Skills required C# .Net Framework and Object Orientated programming concepts. Oracle and SQL server (PL/SQL & TSQL). .NET Core C# and .NET (Windows & Web) development. Web API development DataStage ETL Databricks Key Responsibilities Develop and maintain applications using C#, .NET Framework, and .NET Core for both Windows and Web platforms. Design and implement Web APIs More ❯

Responsibilities Develop and integrate protocol creation features into an AI platform Build front-end components, document generation (DOCX via Jinja2), and template logic Implement secure data pipelines (Study Builder API, Databricks integration) Develop backend content databases and business logic Support validation, testing, and optimization phases Manage Azure-based deployment and SaaS delivery Tech Stack Cloud: Azure (deployment, integration, hosting … Languages/Frameworks: Python, Jinja2, API development Data: Databricks, SQL, role-based data ingestion pipelines Delivery: SaaS, CI/CD pipelines Required Experience Proven Full Stack Development experience Strong knowledge of Azure cloud architecture and deployment Experience with SaaS and enterprise-scale applications Background in AI, data processing, or regulated industries is advantageous Interested? Apply now to More ❯

across UK Government for digital redaction and data sensitivity review. You'll join a multi-disciplinary team delivering scalable, secure, and high-performance software solutions. Key Responsibilities Front-End Development Build responsive user interfaces using HTML, CSS, JavaScript, TypeScript, and React. Ensure cross-browser compatibility and optimised user experience. Back-End Development Develop APIs and microservices using Java … end tests using JUnit, Test Containers, Vitest, and StoryBook. Conduct code reviews to maintain quality and consistency. Security & Documentation Implement authentication, authorisation, and other security best practices. Maintain internal API and code documentation. Essential Skills Strong experience with React, TypeScript, Java, Spring Boot, and RESTful API development. Proficient with SQL databases and CI/CD tools. Hands-on More ❯

across UK Government for digital redaction and data sensitivity review. You'll join a multi-disciplinary team delivering scalable, secure, and high-performance software solutions. Key Responsibilities Front-End Development Build responsive user interfaces using HTML, CSS, JavaScript, TypeScript, and React. Ensure cross-browser compatibility and optimised user experience. Back-End Development Develop APIs and microservices using Java … end tests using JUnit, Test Containers, Vitest, and StoryBook. Conduct code reviews to maintain quality and consistency. Security & Documentation Implement authentication, authorisation, and other security best practices. Maintain internal API and code documentation. Essential Skills Strong experience with React, TypeScript, Java, Spring Boot, and RESTful API development. Proficient with SQL databases and CI/CD tools. Hands-on More ❯

Cloud Security Engineer (AWS) - Node.js/NestJS and REST API - Authentication (Auth0, Ping Identity) Contract - 12 months, upto £650/day inside IR35 ***Hybrid - 3 days office Leading financial services client is seeking a Senior Cloud Security Engineer and help shape their cybersecurity in a fast-paced, global environment. Key Responsibilities Design and enhance modern cloud-based cybersecurity services … Drive continuous improvement in technical standards, tools, and processes Skills and exprience required: Stong AWS cloud expertise (IAM, networking, ECS/EKS, Lambda) Strong Node.js/NestJS and REST API development experience Cloud security principles, including IAM, networking, and encryption Experience with web services and microservices-based architectures If this is of interest and you have the required More ❯

infrastructure? We are looking for someone immediately available with a strong track record of delivering robust, scalable, and secure integration solutions across diverse platforms. With hands-on experience in: API development & integration (REST, SOAP) Middleware platforms (MuleSoft, Dell Boomi, Azure Logic Apps) Data transformation & ETL pipelines Cloud and on-premise system integration If you have technical expertise and More ❯

scaling infrastructure, workflows, and tools to power Large Language Models (LLMs). Partnering with researchers to overcome challenges in agent-generated code. Building frameworks for annotation, training, and model development at scale. What We're Looking For: 4+ years' experience in ML/AI (LLMs, recommender systems, data mining, or similar). Proven hands-on work with LLM agents … . Advanced debugging, experimentation, and optimisation skills. Master's or PhD in Computer Science, AI, ML, or related field . Bonus Skills: Research background (papers, Kaggle Master). Backend API development + frontend (React/JavaScript) for annotation tools. Contract Details: Contract: Outside IR35 Duration: 6-12 months (extension very likely) Location: Remote (UK-based) ?? Apply today to More ❯

Finance or insurance experience is essential Lead PAS implementation, including data migration, integration, testing, and go-live Manage stakeholders across Underwriting, Ops, Claims, Finance, and IT Oversee system architecture, API development, and vendor onboarding Ensure delivery aligns with strategic goals, KPIs, and governance standards We aim to respond to all applicants within 5 days - to avoid missing out 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 ❯

collaborating with stakeholders to align solutions with business goals. Key Responsibilities: Define technical architecture and integration patterns across Salesforce clouds. Guide developers in Apex, Lightning Web Components (LWC), and API development. Manage code reviews, CI/CD, and release processes. Partner with Product Owner and Scrum Master for sprint planning and prioritization. Architect & Lead: Define Salesforce technical architecture and … integration strategies across multiple clouds. Guide & Mentor: Support developers in Apex, Lightning Web Components (LWC), and API development. Govern & Deliver: Oversee code quality, peer reviews, CI/CD pipelines, and release management. Collaborate & Align: Partner with Product Owners and Scrum Masters to plan and deliver sprint outcomes. Innovate & Optimise: Introduce best practices in DevOps, performance, and design scalability. Essential … qualifications: Experience: 8+ years in Salesforce development and architecture; Salesforce Certified Technical Architect (CTA) or equivalent experience preferred. Extensive Salesforce development and architecture experience. Proven ability to define and deliver scalable, secure Salesforce solutions. Expertise in Apex, LWC, API integration, and CI/CD processes. Experience leading and mentoring technical teams in an Agile/Scrum environment. 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 More ❯