Top Tech Jobs & Startup Jobs in London

Build, maintain, and troubleshoot scalable AWS data pipelines using Python, PySpark, Spark, and Airflow. Perform root-cause analysis of pipeline and data-quality issues, apply dimensional modeling and slowly changing dimensions, and deliver governed data assets. Provision infrastructure with Terraform, containerize solutions with Docker, and manage GitLab CI/CD deployments. Work with AWS security, encryption, IAM, monitoring, and analytics services in a regulated government environment.

Lead QA across complex digital transformation programmes: define testing strategies, build and maintain automated test solutions, manage test environments and release assurance, mentor QAT engineers, drive continuous improvement, and provide technical leadership on tooling and quality governance across multiple delivery teams.

Lead QA across complex digital transformation programmes by defining end-to-end testing strategies, building and maintaining automated test frameworks, managing test environments, driving CI/CD and release assurance, mentoring QAT engineers, and collaborating with engineering and product teams to embed quality best practices.

Lead the technical architecture and integration of enterprise-grade AI platforms (semantic search, RAG, generative/agentic systems), embed Responsible AI governance, manage risk/value trade-offs, enable zero-dependency handover through capability uplift, and design energy-efficient AI infrastructure across legacy and multi-cloud environments.

Design, build and maintain cloud-native full-stack applications. Develop secure Node.js REST APIs and responsive Angular front ends, write automated tests, contribute to CI/CD, and support AWS/container deployments within Agile teams.

Design, execute and maintain automated and manual tests (functional, regression, integration, exploratory). Investigate and document defects, support test automation frameworks and CI/CD pipelines, and collaborate with developers and product teams to embed quality across agile delivery.

Develop, test, deploy and maintain secure, scalable backend services and APIs in an Agile environment. Follow secure SDLC and DevOps practices; senior engineers provide architecture direction, lead technical initiatives, mentor engineers, and support high-volume production systems.

Design, build, and maintain responsive, accessible, high-performance web applications; create reusable components and frontend architectures; collaborate with designers and product teams; participate in code reviews, CI/CD, and agile delivery. Senior engineers provide technical leadership, mentoring, standards, and architecture guidance across teams.

Design and build application-level AI features: implement RAG pipelines, prompt templates, retrieval strategies, and agentic workflows; integrate LLM-based functionality with legacy and multi-cloud systems; run structured evaluations, apply human-in-the-loop guardrails, and produce docs-as-code for handover to government engineers.

Build and maintain scalable full‑stack, cloud‑native applications and microservices. Develop REST APIs with Node.js/Express, responsive Angular frontends, automated tests (Jest), and CI/CD (GitLab). Support containerisation, serverless AWS services, Terraform IAC, performance tuning, and collaborate in Agile multidisciplinary teams.