Frontend or Backend Developer - Investment Banking

Developer – Front or Back End – Equities – Investment Banking Contract duration: 12 months Location: London (4 days onsite) Pay: £750-1000/day (PAYE/Umbrella) We’re seeking future team members for our Equities Engineering team in Execution Services Platform. (Note: We value T-shaped engineers — deep expertise in one discipline (backend or frontend) with broad familiarity across the stack is preferred over equal but shallow coverage of both) Core Backend Proficiency: Deep expertise in Java and the Spring ecosystem — including Spring Framework, Spring Boot, Spring Security, Spring Data, and ORM frameworks — with a strong focus on building production-grade, enterprise-scale services.Frontend Development: Proficiency in modern front-end technologies including Angular, TypeScript/JavaScript, HTML/CSS, with working knowledge of jQuery and component-based UI architecture. In this role, you’ll make an impact in the following ways: Architecture & Design Leadership: Play a lead role in the design, architecture and implementation of trading, sales, and operations workflows, ensuring alignment with business goals and engineering best practices.Trade-Flow Platform Development: Design and build flexible, scalable trade-flow software capable of handling diverse client-side and OMS-side integration patterns and high-throughput scenarios.Cross-functional Collaboration: Partner closely with Product, Trading, Operations, and Engineering teams to translate complex business requirements into robust, scalable technical solutions.Technology Innovation: Work alongside a cross-functional engineering team to evaluate and adopt emerging technologies, contributing to a modern, high-performance technology stack.AI-Driven Automation: Champion an AI-first mindset by driving automation initiatives, intelligent code refactoring, and the adoption of AI tooling to improve developer productivity and system efficiency.Engineering Excellence: Deliver well-designed, testable, secure, and performant code through hands-on programming, rigorous code reviews, and adherence to engineering standards.Production Support: Provide second-level production support, troubleshoot complex system issues, and contribute to incident resolution and post-mortem processes.Mentorship & Technical Leadership: Mentor and coach junior and mid-level engineers, fostering a culture of continuous learning, technical growth, and engineering craftsmanship. To be successful in this role, we’re seeking the following: Bachelor’s degree in computer science or a related discipline, or equivalent work experience required, advanced degree preferred.Industry Experience: 10+ years of experience designing, building, and delivering real-time, scalable, and resilient software applications within Financial Services or similarly complex, high-throughput domains.Core Backend Proficiency: Deep expertise in Java and the Spring ecosystem — including Spring Framework, Spring Boot, Spring Security, Spring Data, and ORM frameworks — with a strong focus on building production-grade, enterprise-scale services.Frontend Development: Proficiency in modern front-end technologies including Angular, TypeScript/JavaScript, HTML/CSS, with working knowledge of jQuery and component-based UI architecture.Data & Persistence: Strong command of relational and analytical database technologies, e.g., Oracle / Microsoft SQL Server, with experience in data modeling, query optimization, and large-scale data management.Messaging & Middleware: Hands-on experience with messaging and middleware technologies such as Apache Kafka, IBM MQ, the FIX protocol, with an understanding of event-driven and asynchronous system design.Agile Delivery: Solid understanding of Scrum and Agile methodologies, with a proven ability to deliver in fast-paced, rapidly evolving environments with shifting priorities.Communication & Leadership: Excellent written and verbal communication skills; able to clearly articulate technical concepts to both technical and non-technical stakeholders. Strong organizational skills to coordinate, influence, and drive cross-team initiatives.Problem Solving & Innovation: Demonstrated ability to analyze complex, ambiguous problems and devise pragmatic, innovative solutions — balancing technical rigor with delivery speed.AI-Augmented Development: Familiarity with one or more AI coding and productivity tools (e.g., GitHub Copilot, Cursor, Windsurf, Claude Code), with a willingness to leverage AI-assisted workflows to accelerate development and improve code quality.