involves close collaboration with product, data, and frontend colleagues to deliver high-quality, reliable services. Day-to-day responsibilities include: Designing, implementing and maintaining backend services and REST/GraphQL APIs using Python and Django (or Django REST Framework). Building performant, secure data models and database schemas (Postgres). Writing automated tests (unit/integration) and participating in code More ❯
integration , MLOps , and enterprise AI adoption . Required Skills & Qualifications: Solid experience in integrating AI or ML models into production environments. Proficiency in API development and integration (REST, gRPC, GraphQL preferred). Familiarity with Python , Java , or similar languages used in model deployment. Experience with ML frameworks (eg, TensorFlow, PyTorch, Scikit-learn) and model serving tools (eg, FastAPI, Flask, TorchServe More ❯
platform modernisation Hands-on experience with integration technologies, including Kafka (or similar event streaming platforms), Java-based backend systems, and service orchestration Strong proficiency in API design (REST/GraphQL), microservices architecture, and middleware solution Deep understanding of data flow, interface management, and end-to-end process mapping across complex ecosystems Skilled in producing architectural documentation, including HLDs, LLDs, sequence More ❯
London, South East, England, United Kingdom Hybrid / WFH Options
Hays Specialist Recruitment Limited
to have: Familiarity with Data Architecture Exposure to Cyber Security tooling or working closely with InfoSec/Risk teams Understanding of Data Management frameworks (DCAM, DMBOK) Working knowledge of GraphQL/Data Bricks/Snowflake Previous experience of working with Medical/Healthcare Data Immediate availability If you're interested in this role, click 'apply now' to forward an up More ❯
software design and development, with 5+ years experience in Python, Python backend and APIs, and web frameworks Expertise in front-end web development, including advanced experience with WebGL, React, GraphQL, Relay and familiarity with stylex, flow and similar tools Experience in back-end web development, including advanced experience with Python, Hack, PHP, and similar tools Experience with interactive data visualization More ❯
London, South East, England, United Kingdom Hybrid / WFH Options
Understanding Recruitment
to support a major refactor and enhancement of an existing customer portal for one of our clients. You'll play a key role in modernising the platform with a GraphQL layer, integrating new data sources, and ensuring scalability as new customers are onboarded. If you're a talented engineer with tonnes of experience with Node.JS and Typescript then this will … backend technology to add to your profile! Key experience needed Strong commercial experience with Node.js and TypeScript Proven background in refactoring and rebuilding existing applications Experience designing and implementing GraphQL APIs Solid understanding of backend architecture, modular design, and performance Optimisation Hands-on experience with data integration and API-driven systems Ability to work autonomously within a small, fast-paced … engineering team Excellent communication and problem-solving skills Key Responsibilities Refactor and rebuild core parts of the existing portal to improve maintainability and performance Implement a new GraphQL data layer to support the onboarding of new customers Integrate and render data for fleets of varying sizes, from small businesses to larger operators Collaborate with internal teams to ensure smooth data More ❯