Applied Blockchain Ltd

About the role We're looking for a Senior Full-Stack Engineer to join an established trading platform development programme for a large enterprise client. The system is production-critical, long-lived, and actively evolving, with a strong focus on performance, reliability, and maintainability. While Applied Blockchain is well known for distributed ledger and cryptography work, this role is focused on a non-blockchain trading system built using modern TypeScript-based technologies. You'll be joining a highly experienced team of senior engineers and QA developers, where autonomy, technical ownership, and thoughtful decision-making are expected. What you'll be doing Designing, building, and maintaining features across the full stack of an internal trading platform Working primarily with: TypeScript (Node.js & React) Monorepo tooling, GitHub, GitHub Actions Jest, Playwright Redis, MS SQL, WebSockets Docker, Kubernetes Observability tooling (Grafana, Prometheus, SonarQube) Taking end-to-end ownership of features from design through to production Collaborating closely with platform / DevOps engineers on build pipelines, observability, and operational concerns Communicating directly with the client to clarify requirements and propose solutions Contributing to and improving automated testing practices Participating in peer code reviews and helping maintain high engineering standards across the team Using LLM/AI enabled development tools and techniques (with access to the latest OpenAI/Anthropic/etc. models) as part of day-to-day development Qualifications and Requirements 5+ years of professional software development experience 3+ years of hands-on experience with TypeScript, including Node.js and React Strong experience building and maintaining production systems Solid understanding of DevOps and operational concerns (logging, metrics, automation) Comfortable working in a senior, autonomous engineering team Strong communication skills and fluency in English Flexible working location (remote, London office, or Porto office) Nice to have Experience with functional programming concepts or languages (e.g. OCaml, Haskell) Prior experience in trading, finance, or other real-time systems Benefits 5 days per year dedicated to training £1,000 annual training allowance (up to 50% usable for home workstation equipment) Company equipment and onboarding kit In-person team events every 3 months Annual bonus (company and personal performance dependent) Stock option plan Birthday off Generous employee referral programme About Applied Blockchain Applied Blockchain is an innovative applications development company based in London and Porto, specialising in complex, high-assurance systems using distributed technologies and advanced cryptography. We value pragmatic engineering, clear thinking, and building systems that last.