Top Software Engineer Jobs in London

Design and develop software solutions in C++. Collaborate with customers for requirements, maintain existing systems, and troubleshoot issues.

As a Software Engineer, you'll develop backend services for crypto trading, optimize systems, and collaborate with product teams throughout the development lifecycle.

Build and maintain Dialpad's native Salesforce integration and other integrations, design architecture, write clean modular code with unit tests, participate in code reviews, mentor engineers, support ETL pipelines, and contribute to Agentic AI initiatives to enable real-time automations and data flows.

Build and maintain platform features, partner with product and customers to design solutions, use and validate AI-assisted tools, reason about system interactions and data flows, contribute to technical decisions and code quality, and own outcomes end-to-end.

Design and develop a scalable trade processing and reporting platform while working with cross-functional teams. Requires advanced experience in Java and cloud technologies.

As a Senior Software Engineer, you'll solve financial problems through coding, develop distributed systems, and work collaboratively in a fast-paced environment.

Design and evolve core banking services, ensuring scalability, resilience, and security while influencing technical direction and mentoring team members.

Software Engineers at Zopa focus on building scalable microservices and solving financial problems, working collaboratively with various teams.

Design, implement, and optimize a low-latency high-frequency trading platform for cryptocurrency markets; collect market data, disseminate orders, analyze throughput/latency, build performance tools, and develop access to historical data and simulation systems.

Join the Core backend team to develop resilient platform infrastructure powering B2C, B2B and API features. Build and refine critical flows for OCPI charging sessions, evolve tariffs/pricing logic, improve observability and scalability, and collaborate cross-functionally to deliver robust technical solutions.

The Software Engineer role involves developing high-quality web and mobile applications, collaborating with cross-functional teams, and ensuring core engineering practices while maintaining a strong user focus.

As a Software Engineer, you'll develop low-latency trading applications and infrastructure, focusing on optimization and system performance in a fast-paced environment.

Work with traders and analysts to build scalable Python services and APIs, develop supply/demand models, market data analysis, real-time analytics, visualizations, and workflow automation for the front-office platform.

Develop and maintain APIs, services and customer-facing products across a global fintech platform. Work in Agile teams (pair/ensemble/mob programming), own solutions, participate in on-call rota, and help scale platform and AI-first initiatives.

The Software Engineer will develop, maintain, and test software for Avigilon's VMS, focusing on state management patterns, API integrations, and collaborating with teams on solutions.

Build, test and deploy Python-based trading, risk-management and market-data systems. Work closely with traders and analysts to translate business needs into reliable, production-grade software, own tasks end-to-end, improve performance and usability, and participate in design reviews and testing.

Join a new London engineering hub to design, implement, and maintain backend services. Own complex backend features end-to-end, drive technical design, ensure high test coverage and scalability, mentor mid-level engineers, and collaborate in a cross-functional agile product team to deliver international-grade products.

Build and maintain integrations for North's agentic platform, own the end-to-end integration pipeline, create evals and tests to ensure reliability, tune tool descriptions, and help other engineers add and maintain integrations while using AI responsibly to improve performance and quality.

The Senior Software Engineer will lead the architecture and development of the Zeta Marketing Platform's Addressability part, focusing on real-time data processing, mentoring developers, and collaborating across teams to build scalable solutions.

Architect-level hands-on leader for iOS and Android mobile platforms. Own end-to-end mobile architecture, drive technical standards, contribute to core code, lead testing/CI/CD, observability, release processes, and mentor engineers while partnering with product, design, backend, security, and QA.

Lead an agile engineering team to design, develop, review, and maintain secure, high-quality production code. Provide technical guidance, drive product and architecture decisions, champion AI-assisted development practices, ensure SDLC automation and validation, and promote reuse and operational stability across engineering teams.

Lead design and delivery of metadata, meta-modelling, and distributed systems. Build secure, high-quality production code, drive adoption of AI-assisted engineering, improve SDLC automation and cloud-native delivery, set validation and governance standards, mentor engineers, and influence product and technical decisions.

Summer software development internship building low-latency trading applications and tools. Deliver self-contained features within an existing production codebase, use AI coding tools responsibly, and collaborate with development and trading teams to improve performance-sensitive systems.

The Software Engineer will work closely with AI researchers to develop scalable software integrating AI technologies, manage software lifecycle, and collaborate with cross-functional teams.

Build, automate and maintain vulnerability management tooling and integrations. Prioritise remediation with engineering teams, produce risk-based insights and reports, and develop playbooks to standardise triage and remediation across cloud-native environments.