Senior Full-Stack Engineer

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

Do you have experience in TypeScript?, Do you have a Master's degree?, * 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

• 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