Senior Full-Stack Engineer

Applied Blockchain; Greater London; Hybrid; GBP 70,000 - 90,000; Full time

Job summary

A technology firm in Greater London is looking for a Senior Full-Stack Engineer to join their trading platform development. Responsibilities include designing and maintaining features using TypeScript (Node.js & React), and collaborating closely with a senior team on complex systems. The ideal candidate has over 5 years of software development experience and strong communication skills. Benefits include training days, an annual bonus, and company stock options.

Benefits

5 days per year dedicated to training

£1,000 annual training allowance

In-person team events every 3 months

Annual bonus

Stock option plan

Birthday off

Generous employee referral programme

Qualifications

• 5+ years of professional software development experience.
• 3+ years of hands-on experience with TypeScript, Node.js, and React.
• Strong experience in building and maintaining production systems.

Responsibilities

• Designing, building, and maintaining features across the full stack.
• Taking end-to-end ownership of features from design through to production.
• Collaborating closely with platform / DevOps engineers on operational issues.

Skills

TypeScript (Node.js & React)

DevOps knowledge

Strong communication skills

Experience with Docker

Experience with Kubernetes

Tools

GitHub

Jest

Playwright

Redis

MS SQL

Grafana

Prometheus

SonarQube

Job description

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.