Top Software Engineer Jobs in London

Design and build backend services for custody operations (asset transfers, settlement, account state). Improve scalability, resiliency, and performance; maintain systems ensuring asset safety, transaction accuracy, and operational integrity. Participate in on-call rotation and collaborate with product, infrastructure, and security teams.

Lead design, development, and ownership of a high-volume, multi-currency transactional platform. Architect scalable services, translate financial requirements into technical solutions, mentor engineers, ensure production reliability, and collaborate with global teams on payments, collections, and integrations.

The Solutions Engineer will support the integration of Near Intents, assist developers, enhance product stability, and provide technical support to ecosystem partners.

Build, ship, and operate Cloudbeds' POS: work across React Native/Expo frontend, Python/FastAPI backend, PostgreSQL, synchronization/offline patterns, and cloud-native infrastructure (Terraform, Kubernetes, Argo CD). Own API design, reliability, testing, observability, production support, and cross-team collaboration to deliver dependable, scalable POS experiences for hospitality.

The Senior Software Engineer will develop multi-threaded software in C++ for surveillance cameras, optimize system performance, and collaborate with hardware engineers.

The Senior Software Engineer will enhance software development using AI tools throughout the lifecycle, ensuring quality and maintainability while managing a complex codebase.

The Staff Software Engineer will lead the technical direction for a neurosymbolic AI platform, focusing on system design, architectural decisions, and mentoring. Responsibilities include building APIs, improving deployment frameworks, and enhancing documentation pipelines in a cross-functional team.

The Senior Software Engineer will develop APIs, document ingestion pipelines, and symbolic reasoning capabilities, working in a collaborative environment with a focus on software quality and scalable solutions.

As a Software Engineer, you will design, build, and operate backend services in Go, develop microservices and APIs, and manage deployment workflows using Docker, Kubernetes, and CI/CD practices.

Design, build and maintain backend microservices using Java 17+, Spring Boot and related stack. Integrate third-party platforms, ensure performance and scalability, own technical decisions end-to-end, balance feature work with technical debt, and mentor junior engineers.

The Senior Software Engineer II will architect and build new features for the training platform, collaborate with product teams and support fellow engineers, while improving the development processes and tools.

The Lead Software Engineer will enhance the WMX platform, collaborate across teams to develop technical solutions, coach junior engineers, deliver projects, and ensure effective coding practices.

The Staff Software Engineer will develop and deploy high-performance machine learning systems, optimizing large language models for production environments. Responsibilities include ensuring high availability and low latency for AI applications and working collaboratively across teams.

The Senior Software Test Engineer will lead test engineering initiatives, design automated test frameworks, and advocate for quality within cross-functional teams.

The Senior Software Engineer will build indexing systems and data pipelines for an agent-native search platform, focusing on data ingestion, processing, and organization for AI consumption.

The Senior Software Engineer will develop low-latency, high-throughput systems for a novel search engine. Responsibilities include optimizing request flows, ensuring reliability, and collaborating with indexing and ML teams.

Seeking a Senior Software Engineer to work on rendering APIs and graphics software for PlayStation games, including advocating for game developers and platform teams, with a focus on coding and debugging.

You will develop GPU capture and replay technology, debugging tools, and collaborate with developers to optimize PlayStation hardware.

The Senior Staff Software Engineer will design, develop, and maintain backend systems for Databricks, ensuring high performance and reliability while mentoring junior engineers and leading projects.

Design, build, and maintain cloud-based data pipelines and infrastructure on AWS, integrating on-prem and cloud flows. Implement IaC, CI/CD, containerization, observability, and automation to ensure high-throughput, reliable data ingestion and processing for autonomous systems.

Own and extend simulation tooling for autonomy: integrate simulators with the production autonomy stack, ensure determinism and reproducibility, run large-scale cloud scenario execution, build evaluation and triage tooling, author scenarios, and maintain pipeline performance and coverage for V&V and release gating.

Design and own production GenAI infrastructure for open-weight LLMs and VLMs: real-time GPU serving, high-throughput batch inference, and fine-tuning. Architect autoscaling GPU pipelines, observability, cost controls, and platform surfaces (LLM/Agent Gateways, evals, guardrails). Lead technical direction, mentor engineers, and partner with ML and product teams to deliver reliable, low-cost, high-performance GenAI services to production.

Support development and maintenance of in-house fund management tools, automate processes, analyse and attribute portfolio performance, support data pipelines, and resolve issues for internal stakeholders.

Lead and provide technical leadership to build and run scalable, high-performance cloud services (search, pricing, booking, ML-backed systems). Design architectures, mentor engineers, improve delivery and reliability, and collaborate across product, design and SRE teams.

Owner of backend APIs and platform primitives enabling customer onboarding, entitlements, and policies. Design and build Go-based REST/gRPC services, integrate across teams, extend AI into customer experiences, mentor engineers, and drive features end-to-end from design through rollout.