26 to 42 of 42 API Design Jobs in London

owning the cloud-native platform that underpins conversational AI and generative AI products at scale. Sitting at the core of AI delivery, you will design, build, and operate the runtime, infrastructure, and operational layers supporting RAG pipelines, LLM orchestration, vector search, and evaluation workflows across AWS and Databricks. Working … platform powering conversational assistants and generative AI products. Build, operate, and optimise RAG and LLM-backed services, improving latency, reliability, and cost. Design and run cloud-native AI services across AWS and Databricks, including ingestion and embedding pipelines. Scale and operate vector search infrastructure (Weaviate, OpenSearch, Algolia, AWS Bedrock ...

SLOs, and participating in support rotas. Coding/scripting experience (Python/Bash) in a commercial setting. Database knowledge, streaming and batch operations, and API design. Good background with Kubernetes (ideally microservice architectures using Istio service mesh). Extensive experience with cloud-native solutions (ideally Google Cloud). Solid ...

early-stage, hands-on role with significant autonomy and responsibility to drive backend product development, collaborating closely with founders, creators, and product/design to turn lean specs into reliable, scalable services. Responsibilities Implement features end-to-end on the backend (APIs → data models → integrations) and maintain quality while … z2bz0 years building production backends/services , with shipped work and clear ownership. Strong Python (FastAPI) and database skills ( PostgreSQL/MongoDB ); solid API design fundamentals. Familiarity with AWS serverless patterns and Docker for bespoke services; basic CI/CD concepts. Comfortable with Redis (caching/sessions ...

Great Fit If You: Have 5+ years’ experience building production-grade web apps with React + TypeScript Are comfortable across the stack - API design through to front-end polish Have experience with AWS or similar cloud infrastructure Care about ownership, quality, and impact Are curious about AI, automation ...

onsite) Salary: Up to £80k DOE Type: Perm Job Description We are looking for a passionate Senior Java Engineer in London to lead the design and development of core product features and services that power an app used by thousands of travellers on a daily basis. As a Senior … impactful product features Ensure the quality of the features you built, follow-up on usage/issues post release. Work closely with product and design team to deliver new features that align with the needs of the business Provide technical leadership and mentoring to other engineers on the team ...

onsite) Salary: Up to £80k DOE Type: Perm Job Description We are looking for a passionate Senior Java Engineer in London to lead the design and development of core product features and services that power an app used by thousands of travellers on a daily basis. As a Senior … impactful product features Ensure the quality of the features you built, follow-up on usage/issues post release. Work closely with product and design team to deliver new features that align with the needs of the business Provide technical leadership and mentoring to other engineers on the team ...

data The Stack Go (Railway) Postgres Terraform (Infrastructure as Code) What We Are Looking For 3+ years of Go experience Deep understanding of design patterns and system architecture Experience building scalable, performant platforms Strong grasp of event-driven systems and concurrency Solid database and API design experience … Have Zero-to-one product experience, including OSS or side projects Data engineering experience such as pipelines and analytics Experience integrating LLMs, including prompt design and understanding model capabilities Deeper cloud experience, especially with GCP Experience with Encore, though this is easy to pick up Ways of Working Ownership ...

similarity matching - Context window management and chunking strategies MCP & Tool Integration: - Model Context Protocol (MCP) implementation - Tool calling and function integration with LLMs - API design for LLM tool interfaces - AWS Lambda integration with agents AI Safety & Evaluation: - Guardrail implementation (hallucination detection, toxicity filtering) - Response evaluation framework design ...

similarity matching- Context window management and chunking strategies MCP & Tool Integration:- Model Context Protocol (MCP) implementation- Tool calling and function integration with LLMs- API design for LLM tool interfaces- AWS Lambda integration with agents AI Safety & Evaluation:- Guardrail implementation (hallucination detection, toxicity filtering)- Response evaluation framework design ...

security expertise to projects built on multiple platforms, such as Salesforce and Azure Exposure to Cloud Native software development, including cloud infrastructure and API design (Azure preferred) Proven experience applying modern standards such as OWASP CI/CD, DSOMM, SAMM etc Strong networking protocol knowledge (TCP/… HTTP/3, AMQP, streaming protocols etc), cloud network design (VPNs, subnets, regions/zones etc), and integration related technologies (Auth0, APIM) Expertise with SAST & SCA systems such as Snyk, Checkmarx Experience with DAST systems such as OpenZAP, Qualys DAST (preferred) ideally with HTTP APIs Ability to manage large ...

automated testing into CI/CD pipelines so quality is continuous and enforced Upskill and mentor test engineers and software engineers in automation, test design, and quality engineering Establish quality standards, best practices, and governance without slowing teams down Reduce manual testing, flaky automation, and release risk Partner with … engineering leadership to raise overall engineering maturity Influence system and API design to improve testability, resilience, and maintainability Essential experience A software engineer at heart with senior test engineering leadership experience Proven track record of creating and evolving test strategies, not just executing them Experience building and scaling ...

share code with iOS. You’ll be joining a collaborative engineering group working on major new features, shaping technical discussions, influencing architecture and API design, and helping to evolve a category-defining product used across the UK, US and several new international markets launching in 2026. What they ...

elevate team capability What we expect from you? Strong experience with React, TypeScript/JavaScript and another BE language such as Java Understanding of API design, integration and security Experience with relational databases A track record of delivering complex systems with clean architecture Interested in learning more ...

monitoring solutions to improve visibility, reliability and overall platform performance Skills & Experience Required: Experience with cloud-native software development, including cloud infrastructure and API design (Azure preferred) Willingness to apply security and engineering expertise across multiple platforms, such as Azure and SaaS solutions Proven experience working with modern ...

Tooling Expertise: Use Prometheus, Grafana, and Dynatrace for data collection, visualisation, and deep-dive analysis. •Proficiency in Prometheus, Grafana, and Dynatrace. •Strong knowledge of API design, data modelling, and pipelines. •Experience with automation, monitoring platforms, and scripting languages (e.g., Python, PowerShell, Bash, Terraform and Ansible) to enhance operational ...

leadership (Lead Engineer/CTO). Hands-on experience in regulated environments (fintech, trading, or gambling). Backend expertise (Rust preferred), relational databases, API design, blockchain integration. Familiarity with smart contracts, oracles, bridges, and authentication/security protocols. Strong problem-solving, mentoring, and cross-team collaboration skills. Nice ...

TypeScript will be valuable for occasional UI enhancements and bridging front-end requirements. Collaboration with cross-functional teams to implement best practices in API design, security, and performance tuning will be central to success. Additionally, you'll contribute to code reviews, documentation, and continuous improvement initiatives to maintain ...