7 of 7 API Development Jobs in the City of London

the success driving innovation and excellence in our network infrastructure. Essential Technical Skills: Front-end: Angular, TypeScript Back-end: Java, Python, Spring Boot Database: MongoDB, PL/SQL,NOSQL API Development: RESTful APIs Version Control: Git CI/CD: TeamCity Desirable Skills: Docker and Containerization Monitoring and Logging (e.g., Prometheus, Grafana, ELK Stack) Cloud Platforms (AWS, Azure, Google … Cloud) Security and Compliance API Documentation (e.g., Swagger, OpenAPI) Code Quality Tools (e.g., SonarQube) Agile Methodologies (Scrum or Kanban) Soft Skills: Team Collaboration : Ability to work effectively with cross-functional teams, sharing knowledge and expertise. Proactive Approach : Anticipate challenges, identify opportunities, and take initiative to drive progress. Ownership and Accountability : Take ownership of tasks and projects, driving them to … the larger picture. Problem-Solving and Resilience : Drive issues to resolution, navigating complexities without getting bogged down. Training CACI Network Services develops individuals through a portfolio of training and development options such as certified training courses, workshops, technical conferences, boot camps, on-line training and much more. You will have the opportunity to work on some of the most More ❯

the backend engineering efforts of our enterprise platforms. This role requires strong architectural acumen, hands-on coding capability, and a leadership mindset to guide teams across the full software development lifecycle. Exposure to mobile application ecosystems, collaboration across cross-functional teams, and experience in the banking or financial services domain will be strong assets. You’ll work closely with … stakeholders to deliver scalable, secure, and maintainable solutions. Key Responsibilities: • Design and develop scalable, secure, and high-performance backend systems using Java, Spring Boot, and modern architectural practices. • Lead development of RESTful APIs and microservices along with mobile platforms, ensuring consistency and alignment with business and UX goals. • Drive integration with API Gateway technologies (e.g., Kong, Apigee, AWS … API Gateway) to enforce access control, rate limiting, and API lifecycle management. • Implement robust authentication and authorization workflows using IDAM platforms such as Ping Identity, Okta, or Auth0, with support for OAuth2, OIDC, and JWT. • Collaborate with mobile app teams to ensure backend services are optimized for mobile-specific use cases such as performance, caching, and offline access. More ❯

A leading global insurer are looking to hire a Software Engineer to focuss on API Implementation to join a well established team which is growing. The role will involve developing analytics solutions using leading tech stacks and cloud technologies (Azure, Snowflake, Databricks and Python). The Role Develop and maintain an API strategy aligned with business objectives, enhancing … current systems and integrating third-party APIs. Design and develop API architectures, set standards, and collaborate with stakeholders to integrate APIs with existing systems. Build integrations with both internal systems and external API providers. Document API development processes, code, and revisions using Confluence. Implement robust security protocols for APIs and coordinate with cybersecurity teams to address … threats. Continuously monitor API performance, troubleshoot issues, and manage regular updates and maintenance. Communicate with developers, IT teams, and business leaders to align API initiatives with business goals. Provide training and technical support on effective API usage to team members. Manage technical relationships and coordinate with third-party vendors. Research and stay current with trends and innovations More ❯

of collaboration and continuous improvement. Evangelise emerging technologies and modern engineering practices. Mentor and guide large technical teams, promoting high standards in code quality, DevSecOps, and automation. Drive the development of cloud-native applications, with a strong focus on modern JavaScript frameworks and API/microservices architecture. Monitor and improve engineering maturity across teams. Collaborate closely with stakeholders … manage technical dependencies, and communicate effectively through strong storytelling and influence. Essential Skills & Experience: Strong background in JavaScript frameworks, microservices, and API development. Experience in building modern applications with cloud-native architectures. Proven leadership in large technical teams, with an Agile and product-focused mindset. Expertise in engineering culture, DevSecOps, and automation. Experience with public cloud platforms (e.g., AWS More ❯

the-art generative AI, retrieval-augmented generation (RAG), and reasoning frameworks to build intelligent and context-aware systems. We are seeking talented Machine Learning Engineers with full-stack software development experience to join our client's team and help shape the future of AI-powered automation. Within this dynamic role varied duties will include: Search relevancy engineering. Conversational AI … Development : Design, train, fine-tune, and deploy LLMs with reasoning capabilities. Retrieval-Augmented Generation (RAG): Implement, optimise, and scale RAG pipelines for effective information retrieval from structured and unstructured sources. Model Fine-Tuning & Training : Train domain-specific models using techniques like LoRA, QLoRA, PEFT, reinforcement learning, and supervised fine-tuning (SFT). Model Deployment & Inferencing : Optimise model serving and … AutoGen, and DSPy. AWS Cloud & MLOps: Deploy scalable machine learning workloads on AWS using services like SageMaker, Bedrock, Lambda, S3, DynamoDB, ECS, and EKS. End-to-End AI Product Development : Work across the full ML lifecycle, from data collection and preprocessing to model evaluation, deployment, and monitoring. Full-Stack Integration : Develop APIs and integrate ML models into web applications More ❯

Golang Developer/Backend Software Engineer (Go Kafka API) London/WFH to £110k Do you have a deep knowledge of Go/Golang combined with software architecture and design skills? You could be progressing your career as a Golang Developer at a start-up payments technology company that is revolutionising the payments industry to Africa, improving speed, cost … ll join colleagues in the London, Canary Wharf offices four days a week. About you: You're an experience backend focussed Software Engineer with strong commercial Go/Golang development experience You have experience with system design, event driven architectures, Kafka, API development You have a product based mindset and commercial acumen You have a thorough understanding … a competitive package: Salary to £110k Impactful role with excellent career growth opportunities Apply now to find out more about this Golang Developer/Backend Software Engineer (Go Kafka API) opportunity. At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people More ❯

site in London *very competitive daily rate* Key Responsibilities: Own and manage the payments product roadmap , aligning with business objectives and market opportunities. Lead high-priority payments projects , including API development for SEPA payment verification , with rollout targeted by October . Gather and document product requirements from internal stakeholders and external partners. Manage end-to-end delivery with More ❯