5 of 5 Permanent API Design Jobs in East London

Full Stack Engineer with a strong back-end focus to join one of our Profile domain product teams. This role is full stack by design: you will work across back-end and front-end codebases, contributing to end-to-end product delivery. However, your primary strength will … front end. You will join an established, autonomous product team owning their product end-to-end, with real ownership over technical design, implementation, and continuous improvement. Your responsibilities Design, build and evolve scalable back-end services using C# and .NET Core, alongside developing front-end features with modern ...

senior, individual engineers have outsized impact which is exactly why ownership matters so much in this role. What you'll own Backend & architecture. Design, build and evolve the services, APIs, data pipelines and scoring/recommendation logic at the core of the product owning architecture, infrastructure, schema design … looking for Must-haves Strong full-stack/backend engineering. 5+ years of professional software development (stack flexible) with strong server-side fundamentals API design, data modelling/schema design, authentication patterns and clean service architecture. Comfortable across SQL databases and a modern backend stack (e.g. Python ...

that sit between our LLM providers and our customer-facing products, focusing on reliability, latency, and cost efficiency at scale. What You'll Do: Design and maintain APIs serving LLM-powered features (chat, search, agentic workflows) to 500k+ monthly active users Build and optimise RAG pipelines, including chunking strategies … performance for both relational (Postgres) and vector (pgvector/Pinecone) workloads Collaborate with ML engineers on model-serving infrastructure and prompt-caching strategies Drive API versioning and backwards compatibility as the product iterates quickly Core Tech Stack: Languages: Python (FastAPI), Go, TypeScript (Node.js) Databases: PostgreSQL, Redis, Pinecone/pgvector ...

across the business, embeds intelligent automation into products and workflows, and uses modern AI tools to accelerate engineering and innovation. What you'll do Design and build scalable backend services in Python (FastAPI or similar). Own cloud infrastructure across AWS (GCP experience a bonus). Build secure APIs … with product, data and client teams. What we're looking for Proven experience building and operating production backend systems at scale. Strong Python, Postgres, API design and AWS expertise. Experience with Redis, CI/CD and cloud-native architectures. A genuine AI advocate with experience using ...

across the business, embeds intelligent automation into products and workflows, and uses modern AI tools to accelerate engineering and innovation. What you'll do Design and build scalable backend services in Python (FastAPI or similar). Own cloud infrastructure across AWS (GCP experience a bonus). Build secure APIs … with product, data and client teams. What we're looking for Proven experience building and operating production backend systems at scale. Strong Python, Postgres, API design and AWS expertise. Experience with Redis, CI/CD and cloud-native architectures. A genuine AI advocate with experience using ...