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Applied Blockchain
$105k - $115k estimated
England London United Kingdom

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

  • 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

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.

What does a blockchain developer do?

A blockchain developer is a software developer who specializes in the development of applications that make use of blockchain technology

Some of the responsibilities of a blockchain developer may include:

  • Designing and implementing smart contracts.
  • Creating and maintaining the infrastructure that supports the blockchain network, and developing user-facing applications that make use of the blockchain.
  • Additionally, a blockchain developer may also be responsible for researching and staying up-to-date with the latest developments in blockchain technology, in order to ensure that their applications are secure and efficient.