Senior Software Engineer; Back End

Role Overview

As a Senior Back‑End Engineer, you will design, develop, and maintain robust server‑side applications and APIs that support high‑volume, data‑intensive environments. You will play a key role in shaping technical architecture, ensuring system reliability, and driving best practices in software engineering. This position requires strong problem‑solving skills, deep technical expertise, and the ability to collaborate effectively with cross‑functional teams.

• Lead by example as a hands‑on engineer, working closely with Architects, Principal Engineers, and Trading SMEs to design, build, review, test, and deliver mission‑critical, high‑performance systems end‑to‑end.
• Own engineering deliverables throughout the full lifecycle, ensuring performance, scalability, resilience, and alignment with engineering best practices.
• Mentor engineers, elevate code quality standards, and foster a culture of technical excellence.
• Drive innovation through POCs, technical evaluations, and continuous improvement initiatives.
• Communicate progress proactively, highlighting risks and removing delivery impediments.

• Significant years of hands‑on experience building and supporting latency‑sensitive front‑office trading systems (OMS, Matching, Execution).
• Strong background in designing and maintaining distributed, event‑driven, cloud‑native applications.
• Deep understanding of low‑latency engineering, concurrency, multithreading, and performance optimisation.
• Comprehensive SDLC experience across design, development, QA, deployment, and production support.
• Ability to balance rapid delivery with architectural rigour and long‑term maintainability.
• Strong relational database design and optimisation skills in MSSQL and MySQL.
• Proven problem‑solving capabilities and ability to validate ideas through POCs.
• Experience building automated testing frameworks for complex distributed systems.
• Ability to engage effectively with traders, quants, and other business stakeholders.
• Desired domain experience in Credit or Fixed Income.
• Expertise in modern .NET technologies and C# (Java or similar OO languages considered).
• Experience implementing observability (metrics, tracing, logging) for distributed systems.
• Experience with CI/CD pipelines, containerisation (Docker), and orchestration (Kubernetes/EKS).
• Experience designing APIs (REST, Graph
  
  QL).
• Knowledge of distributed messaging and caching technologies (e.g., Solace, Redis, or similar).
• Understanding of FIX protocol and FIX message handling.
• Hands‑on experience with AWS, microservices, and serverless patterns.
• Familiarity with React and DAPR (nice to have).
• Understanding of TDD, BDD, or similar testing methodologies.

Manager, 6

UK – 135 Bishopsgate, London