Backend engineer in investment technology

We are looking for a senior backend software engineer to join our core service API team within Investments Technology. Our team designs, builds and operates the core services and APIs that are used across Investments Tech applications, supporting portfolio managers, analysts, and traders across Equity, Fixed Income and Multi-Asset. In this role you will design, develop, modify, adapt and implement short and long-term solutions that enhance and expand these shared services.

• Delivering new core services and API capabilities, primarily in Java and C#, for consumption by multiple Investments applications and teams.
• Maintaining and enhancing existing services, including those written in Python and Node.js, and driving their modernization where appropriate.
• Improving service reliability, performance and observability through automated testing, telemetry, monitoring and alerting.
• Providing support for production services and their consuming teams, including onboarding and API documentation.
• Performing as a domain expert across the software lifecycle (design, coding, testing, deployment, operations), leading significant pieces of development.
• Leading code reviews and actively participating in providing feedback on others' designs and code.
• Being accountable for technical debt in your own software, and for the long-term maintainability of the services you own.
• Owning complex technical problems — breaking them down methodically, making tactical vs. strategic trade-offs, and adapting your approach as new information emerges.
• Leading projects, work streams, or a small project team as required.
• Mentoring and supporting team members, particularly junior developers, and actively suggesting improvements to team practices and engineering standards.
• Able to work directly with internal consumers, business partners, and technology teams.
• Can articulate business needs and translate them into well-designed, reusable technology services.

• Java and/or C# - Proven track record of designing, building and operating production-grade services in Java and/or C#, our primary languages for all new services. Willingness to work across both is expected.
• Polyglot Flexibility - Working knowledge of Python and Node.js, with the ability to support, debug and enhance existing services written in those languages.
• API Design - Strong experience designing and versioning well-structured, secure and reusable APIs (REST required; gRPC, GraphQL or event-driven APIs a plus), with a focus on backward compatibility and consumer experience.
• Service Architecture - Experience with microservices, distributed systems and data persistence (relational and NoSQL), including resilience, scalability, caching and messaging patterns.
• Testing Discipline - A test-first mindset with proficiency in unit, integration, contract and performance testing frameworks appropriate to each language (e.g. JUnit, xUnit, pytest, Jest).
• CI/CD & DevOps - Hands-on experience owning and debugging CI/CD pipelines (GitLab preferred), including automated build, test and release, and deploying services in containerised environments.
• Buy or sell side investment management domain knowledge (Equity, Fixed Income or Multi-Asset).
• Будет плюсом: Cloud and Containers — Experience with Docker, Kubernetes and a major cloud platform such as AWS or Azure; Observability and Operations — Experience with logging, metrics, tracing and monitoring tools, and with supporting production services; AI-Assisted Development — Proficiency with modern AI tools (Claud, Copilot, etc.) to accelerate workflows and code quality; Security — Experience with authentication and authorization standards (OAuth2, OIDC, JWT) and secure service design; Messaging and Real-Time Data — Experience with Kafka, MQ or similar messaging platforms, or with WebSockets and streaming architectures; API Management — Experience with API gateways, documentation tooling (e.g. OpenAPI/Swagger) and developer onboarding for shared services; Previous asset management/financial services experience is useful but not required

• You’ll enjoy resources to support your career path, as well as compensation, benefits, and flexibility to enrich your life.
• This position requires at least two days a week in our London office (up to three day at home)