Senior Java Developer – London – Fintech

Company: United States Digital Space LLC
Apply for the Senior Java Developer – London – Fintech
Location: London
Job Description:

WE ARE

At Adaptive, we are a financial consulting firm that partners with capital, commodity, and digital market participants. We value differentiation through technology. Our experienced teams design and deliver complex front-office technology solutions using our proven accelerators to create long-term competitive advantage.

Our clients include the world’s leading investment banks, investment managers, fintechs and capital market service providers. With a global reach with offices in London, New York, Barcelona and Montreal, we have a proven track record delivering powerful, elegant and intuitive trading technology solutions.

We are expanding our product capability and looking for talented individuals to help build transformational capital markets products including:

  • Aeron – our flagship high-performance messaging infrastructure.
  • Hydra – our developer framework for accelerating the development and delivery of trading systems.
  • Artio – our market-leading open-source FIX engine.

YOU ARE

  • A great team player who loves sharing knowledge and learning from others
  • A problem solver with strong analytical skills
  • Excited about learning new things and keeping up to date
  • Happy to work in a test-driven and Agile development fashion

YOU HAVE

  • Experience in Java server-side software development.
  • Expertise in Java technologies, including related Java and other technologies.
  • Solid experience programming using Core Java. Minimum Java 17
  • General knowledge of data injection/inversion of control.
  • Experience using messaging technologies.
  • General familiarity with data structures such as sets, hashes, caches etc.
  • Knowledge of concurrency, resiliency, caching, HTTP and REST.
  • A good understanding of software development methodologies and best practices, including experience with Agile methodologies
  • Working with DevOps to deploy applications.
  • Experience with software maintenance, bug fixing, and enhancements.
  • Experience with Agile development methodologies (Scrum, Kanban).
  • Excellent communication skills, both written and verbal, with the ability to communicate technical concepts to non-technical stakeholders.
  • Strong analytical and problem-solving skills.
  • Strong Exposure to standard financial interchange protocols i.e. FIX, ITCH

YOU WILL

  • Design and develop Java applications and libraries
  • Write clean, efficient and well-documented code.
  • Troubleshoot and debug Java applications to ensure smooth performance.
  • Conduct unit testing to ensure code quality and application stability.
  • Participate in code reviews to ensure code quality, maintainability, and reusability.
  • Keep up-to-date with emerging trends and technologies in Java development.
  • Participate in Agile development methodology and adhere to software development best practices.
  • Pair with other team members to ensure high-quality outcomes

NICE TO HAVE

  • Exposure to low latency/high performance systems
  • Exposure to additional languages (C, C++, Go, Rust, C#)
  • Experience developing Front Office financial systems
  • Experience in delivering OMS/EMS/Exchange systems
  • Exposure to equities trading and brokerages
  • Experience with build tools and automation Gradle, GitHub Actions etc
  • Experience with cloud computing platforms, such as AWS or Azure, is a plus.

BENEFITS

  • 25 days holiday
  • Family medical and dental
  • Pension plan
  • Season ticket loan
  • Gym subsidy
  • Life insurance
  • Long-term disability insurance
  • Employee Assistance Plan

BACKGROUND CHECK

The employment/engagement is subject to an acceptable background check that will be run by Adaptive.

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Posted: June 16th, 2026