Top Software Engineer Jobs in London

Build full-stack AI-enabled applications and backend services integrating MCP servers, LLMs, RAG retrieval, and agent orchestration. Design reusable MCP tools/skills, implement secure RBAC, ensure observability, and prepare deployments for OpenShift/Kubernetes while collaborating across product and platform teams.

Join Markets Technology Trading as a Software Engineer II to design, develop, and troubleshoot secure, stable, high-quality Python code. Leverage enterprise AI-assisted development tools, collaborate in an Agile team, handle data processing and production engineering tasks, and apply SDLC practices to build performant, resilient applications while learning domain systems and secure coding standards.

Design, develop, test, and maintain real-time, high-performance pricing, trading, and risk systems for Credit Trading. Collaborate across the SDLC, integrate Python and Java analytics, follow best practices (testing, code review), troubleshoot, and ensure secure, stable, and scalable applications.

The intern will work on developing high-performance research platforms, create tools for trading strategies, and collaborate with teams to innovate financial technology.

Develop and maintain internal build, test, and integration tooling for the ML software stack. Build release processes, assist dependency management, guide developers on build best practices, collaborate with QA and engineers to resolve integration issues, and contribute fixes to the ML software stack.

Build high-performance, production-ready trading and research platforms in small teams. Design systems architectures, develop platforms and web frameworks, apply distributed computing, ML and NLP techniques, and collaborate on complex technical problems.

Join the Continuous Delivery team to design, build, and operate Wise's CD platform. Extend and evolve Spinnaker, create reliable deployment guardrails, improve shared platform foundations, use telemetry to reduce friction, and partner with engineering teams to adopt scalable deployment patterns and platform capabilities.

Design, develop, and maintain secure, scalable software solutions as a seasoned agile team member. Produce high-quality production code, architecture/design artifacts, data visualizations, and troubleshooting. Use CI/CD, resilient application patterns, enterprise AI-assisted development tools, and validate AI outputs. Contribute to engineering communities and improve code hygiene and system architecture.

The Senior Options Software Engineer will design, develop, and support a high-performance trading platform, collaborating with business leaders to create innovative software solutions and handle complex systems support for trading activities.

Design, build, test, and operate secure full-stack features using Java-based microservices and event-driven architectures. Contribute to system design, debugging, automation, CI/CD, and production stability. Collaborate on architecture reviews, share engineering best practices, and responsibly use enterprise AI-assisted development tools.

Design, develop, and maintain secure, high-quality production code and system architectures. Troubleshoot complex issues, analyze large datasets for improvements, ensure application resiliency and CI/CD practices, and contribute to engineering communities and inclusive team culture.

Design, build, test, release, and operate secure, resilient full-stack features for production services. Lead architecture and delivery, author and review Java-based code, troubleshoot cross-service production issues, implement automation and CI/CD, improve performance and stability, and mentor teammates while responsibly leveraging enterprise AI-assisted development tools.

Build and maintain full-stack SaaS features across backend and frontend: develop scalable Python and .NET services, create React/TypeScript UIs, design and integrate REST/gRPC APIs, support cloud-native deployments, production monitoring, incident resolution, and apply security, CI/CD, and testing best practices while collaborating with product and business stakeholders.

As a Software Engineer, you will develop backend services for AI applications, optimize cloud infrastructure, and manage production-level deployments.

Design and develop cross-platform mobile solutions using React Native, collaborating with teams to create integrated consumer experiences while ensuring app performance and reliability.

Design, build, and operate reliable, scalable AI/ML platform infrastructure. Develop observability, resilience, security, and automation tooling, own NFRs, participate in on-call rotations, troubleshoot production issues, and collaborate cross-functionally to support large-scale AI deployments.

Perform deep security assessments of open source framework internals (routing, middleware, caching, build tooling), find and fix systemic vulnerability classes, own disclosure/CVE processes, triage and run OSS bug bounty reports, build preventive tooling (linters, codemods, CI), and harden supply chain practices for Vercel-maintained projects.

Embedded senior security engineer owning end-to-end security for v0: proactively find and fix vulnerabilities, build security features (sandboxing, isolation, permission boundaries), review launches, manage HackerOne reports, refine threat models, harden code execution, and respond to v0-specific incidents while shipping product features alongside the team.

11-week internship building high-performance research platforms and trading tools. Work in small teams on distributed systems, NLP/ML applications, and web frameworks while collaborating with senior engineers.

Lead and contribute to building scalable, production-grade data systems for private markets. Architect end-to-end data workflows supporting analytics and AI/ML, ensure observability, testing, and operational maturity, influence technical strategy, engage senior stakeholders, and manage and mentor software engineers while partnering with product, data science, and business teams.

Seeking a Senior Software Engineer for the Beacon Core Engineering team to design, build, deploy, and maintain software tools and assist clients using AI agents, focusing on quality code and collaboration.

Design, develop, test, and deploy Python-based solutions for finance regulatory reporting platforms (Axiom ControllerView). Improve data pipelines and ETL processes, collaborate with business and tech partners, identify service-quality improvements, and follow security, compliance, and Agile/DevOps practices.

Develop and operate Vercel's persistence infrastructure: manage regional clusters and fleets, write Go and use Terraform, work with Nomad, virtual filesystems, VMs and Linux primitives, ensure platform reliability and performance, provide on-call coverage, and collaborate across teams to deliver compute features like Persistent Sandboxes.

Build full-stack, low-latency trading and pricing tools for options traders. Collaborate with traders, researchers, and business stakeholders to design intuitive frontends and scalable backend services, prototype and productionize distributed systems, and expand trading capabilities globally while improving performance, stability, and usability.

Design, develop, and maintain KDB-based systems for large options datasets; build scalable real-time and historical data applications; write secure production code, optimize query performance, ensure high availability and resiliency; collaborate with stakeholders and support teams; work within agile CI/CD processes and assist platform migration.