Top Software Engineer Jobs in London

The Staff Software Engineer will develop AI tools integrated with game engines and services, focusing on C++ and automation for game development.

Senior Software Engineer will be a founding member of a Learner Experience pod owning end-to-end delivery: discovery, solution design, production, iteration and outcome measurement. Work across full stack with strong front-end/UX focus, use AI-assisted development, uphold TDD and code review standards, coach peers, and collaborate closely with non-technical stakeholders to shape impactful edtech features.

As a Senior Software Engineer, you'll enhance the Affiliate Marketing platform by designing reliable services, mentoring engineers, and ensuring system efficiency using Agile methodologies.

Design and build scalable applications using JavaScript or Python, implement data storage solutions, optimise performance, ensure testing and CI/CD practices, collaborate with clients and technical leaders, and maintain high code quality through reviews and agile delivery.

Lead backend and edge/IoT engineering, implementing scalable solutions and mentoring team members while collaborating with Data Science teams.

The Senior Full Stack Engineer will design, build, and own scalable SaaS applications, focusing on performance, reliability, and future-ready architectures, while mentoring engineers and collaborating with Product and Design teams.

Deploy, test, and troubleshoot CHAOS software in customer environments; translate customer workflows into product requirements; design and build new software; integrate sensor data; develop and apply ML/AI solutions; collaborate with engineering teams and travel to customer sites and company offices as needed.

Build and operate a managed PostgreSQL service for AI workloads: develop control plane and lifecycle automation in Go, tune PostgreSQL internals and ecosystem tooling, create migration tooling, integrate vector search, run SRE practices (SLOs, observability, incident response), and work directly with customers on architecture and escalations.

Design and develop software solutions from scratch, collaborating on government projects, and participating in the software development lifecycle.

Work on YDB distributed storage and database systems to maximize performance on modern and legacy hardware (NVMe, HDD, DPUs). Reengineer components for low-latency, high-throughput workloads, profile and debug production systems, and design resilient distributed storage primitives. Collaborate on incident resolution and production deployments to support Nebius cloud services.

Build and maintain a distributed, fault-tolerant, high-performance block and filesystem storage system. Work on virtualization (virtio-blk, virtio-fs, QEMU, vhost-user), high-throughput VM-to-storage networking (TCP, RoCEv2/RDMA), and core storage features like replication, consensus, self-healing, and data migration. Debug and optimize performance-critical I/O paths while writing reliable, maintainable code in a collaborative team environment.

The Senior Software Engineer will develop features for Phantom's web platforms, lead new product initiatives, interface with users, and contribute to team culture.

The Sr. Software Engineer (FE) will lead the development of scalable frontend applications using React. Responsibilities include systems design, testing strategy, performance optimization, AI integration, and mentoring.

The Staff Software Engineer will design and manage end-to-end data pipelines, ensuring data quality and governance while collaborating across Java and Python systems, including event schema design and AI tooling.

Join Rothesay as a Quantitative Engineer to build functionalities on a new platform using Rust and Python, focusing on financial analytics.

The Lead Software Engineer will oversee development in abuse and fraud prevention, lead teams, design systems, and ensure high-quality outcomes.

As a Senior Software Engineer, you will enhance our Affiliate Marketing platform through clean code, team collaboration, and mentorship, focusing on backend services and technical improvements.