Ncounter

Software Developer in Test (C# or TypeScript) London Hybrid 3 days per week £65,000 to £75,000 base plus discretionary bonus Ncounter is partnered with a high-performing technology team who are looking for an SDET to help deliver complex, user-facing products. This is a role for someone who thinks like a developer but specialises in quality, working side by side with engineers to ship reliable, well-tested features at pace. Personality is just as important as technical expertise; they want someone collaborative and personable who will strengthen the team culture. You'll be joining the Web Engineering group, which works across React and C#, and the role sits within a developer-in-test model that blends QAs and developers. The team is made up of juniors through to a team lead, with a strong culture of collaboration, reviews and shared learning. Hybrid working is three days per week in a new central London office. Key responsibilities Design, extend and maintain modern automation frameworks Develop reliable UI and integration tests with Playwright or Selenium Collaborate with engineers to improve testability and overall code quality Contribute to CI/CD pipeline improvements Support delivery of key projects across the web portfolio Must-have skills Strong coding skills in C# or TypeScript Experience with at least one framework: Playwright or Selenium Ability to read and work with full-stack code (React / C#) Understanding of automation within a developer-in-test environment Clear, collaborative communication style Nice to have Knowledge of DevOps practices and CI/CD pipelines Broader test automation experience across multiple tools Exposure to cloud environments The interview process is structured and efficient: an initial 30-minute call with engineers, a focused take-home task in C# or TypeScript, then an onsite session with senior engineers and stakeholders. If you are motivated by building frameworks, improving automation reliability, and embedding quality at the heart of engineering, we'd like to hear from you. Please send your CV to Ncounter with a short note on your recent automation work and the impact it delivered.

Product-Focused Backend Engineer - Functional Programming & Distributed Systems London (Hybrid) £120,000-£160,000 + Equity At Ncounter, we're partnering with a cutting-edge AI company on a mission to redefine how professionals in highly regulated industries interact with complex, multi-modal data. Their platform empowers users to deploy custom no-code AI agents that produce verifiable outputs with full transparency - ensuring trust, compliance, and control remain central to every decision. As a Backend Engineer, you'll join a growing team working at the forefront of AI infrastructure. This isn't just about clean code or strong delivery - it's about ownership, product intuition, and building for scale. You'll be part of a lean, high-calibre engineering function where every member contributes to planning, testing, analysis, and execution. What You'll Be Doing: Building and evolving APIs that serve as the backbone for internal systems and customer-facing applications Scaling the platform to support heavy, multi-tenant usage patterns and high-throughput AI workloads Applying foundation models (GPT-4.1, Claude 4, Gemini 1.5 and successors) to real-world, multi-modal data challenges Shipping to production daily in collaboration with Product and Design to solve real user problems Playing an active role in shaping team goals, defining technical metrics, and prioritising outcomes over ticket-chasing Your Background: Hands-on experience with functional programming (Elixir is a plus, but other languages like Scala, Haskell, Clojure, Go, Node.js, or F# are welcome) Proven track record of building and scaling distributed backend systems Solid understanding of infrastructure-as-code and cloud orchestration (AWS, Terraform, Docker) Familiarity with queue management, observability tooling, and shipping in fast-paced environments Awareness of GenAI and prompt engineering, or a keen interest to develop expertise in this area A self-starter attitude, with a strong sense of product ownership and a passion for solving end-user challenges This is a unique opportunity to work on real-world applications of cutting-edge AI, contributing to a platform where engineering excellence and product thinking go hand-in-hand. If you're looking for a role with tangible impact and huge technical scope, we'd love to hear from you. Reach out today to start the conversation.