Java Developer - Inside IR35

Java / Scala Developer

£(Apply online only) p/d inside IR35

Hybrid, London - 2-3 days on site

6 months + extension

Brief

My client is looking for an experienced Java / Scala Developer to join a leading investment bank to sit within their FICC eTrading technology team.

While strong Java/Spring expertise is essential, prior experience with Scala is highly desirable - but not a requirement, if you have a genuine willingness to learn.

Key Responsibilities

• Design and build eTrading solutions for market connectivity, price distribution, and RFQ engines.
• Collaborate with trading desks, quants, and strategists for L3 production support and new solution design.
• Enhance and maintain core Credit eTrading systems while contributing to cross-FICC initiatives.

Required Skills

• Strong Java / Spring development background.
• Proven experience building FIX trading solutions.
• Hands-on experience with eTrading workflows in Credit or Rates.
• Strong debugging and profiling skills across JDK languages (Java, Scala, Kotlin, Clojure).
• Proficiency with CI/CD pipelines and build tools (Maven, Gradle, SBT, Jenkins).
• Experience with Unix/Linux environments, including process and network diagnostics.
• Exposure to messaging, monitoring, and container orchestration (Kafka, RabbitMQ, Kubernetes, Docker, etc.).
• Solid knowledge of SQL/NoSQL databases (MongoDB, Cassandra, HBase, etc.).

Desirable Skills and Experience

• Scala functional or concurrency libraries (ZIO, Akka Streams, Monix).
• Knowledge of C++ or Rust for performance-critical systems.
• Experience with CQRS architecture and reactive programming (ReactiveX, Spring Reactor).

Modis International Ltd acts as an employment agency for permanent recruitment and an employment business for the supply of temporary workers in the UK. Modis Europe Ltd provide a variety of international solutions that connect clients to the best talent in the world. For all positions based in Switzerland, Modis Europe Ltd works with its licensed Swiss partner Accurity GmbH to ensure that candidate applications are handled in accordance with Swiss law.

Both Modis International Ltd and Modis Europe Ltd are Equal Opportunities Employers.

By applying for this role your details will be submitted to Modis International Ltd and/ or Modis Europe Ltd. Our Candidate Privacy Information Statement which explains how we will use your information is available on the Modis website.