Senior Full-Stack Engineer

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 platform has been live in production for over 7 years, with most of the core team having worked on it for close to 5 years on average — a reflection of the stability, quality, and long-term nature of this engagement.

The system is production-critical 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. The role is full stack in nature, though with a slightly stronger emphasis on the frontend (React/TypeScript).

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

• 8+ 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
• Comfortable working in a senior, autonomous engineering team
• Strong communication skills and fluency in English
• Hybrid work arrangement (Waterloo, London)

Nice to have

• Experience with functional programming concepts or languages (e.g. OCaml, Haskell)
• Prior experience in trading, finance, or other real-time systems
• Solid understanding of DevOps and operational concerns (logging, metrics, automation)
• London-based
• Willingness to travel to company/client events

• 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.