401 to 425 of 470 Senior Software Engineer Jobs in London

Lead Developer is responsible for providing technical leadership across software development projects, ensuring the successful design, build and delivery of high-quality solutions. The role combines hands-on development with technical oversight, mentoring and stakeholder engagement, helping development teams deliver robust, scalable applications in line with project requirements … Working as part of a collaborative team, the successful candidate will provide technical guidance, support delivery activities and contribute to continuous improvement across the software development lifecycle. They will be expected to work independently with minimal supervision while supporting and developing other team members. Key Responsibilities Design, build ...

we make it easy for developers and AIs to build on health data. hundreds of wearables, sensors, labs, and health apps — connected, normalized, and made intelligent through a single platform. 1,000s of developers and ...

DeepL is hiring for an Enterprise Platform Engineer in the UK, focusing on building the revenue‐critical flows and the enterprise experience. You will shape the architecture across React frontends and .NET backends, ensuring secure, scalable provisioning and billing for 200,000+ enterprises. You’ll collaborate with Sales, Product ...

Partner with application and infrastructure teams to deliver integrated, high-quality technical solutions. You’ll Need to Have 5+ years of professional experience in software engineering. Strong experience in TypeScript, especially with building adaptable APIs with ergonomic type inference. Experience in taking end-to-end ownership of technical projects … bindings. Experience building developer tooling workflows, engaging directly with engineers and delivering solutions to a wide engineering audience. Experience integrating AI-powered workflows into software engineering practices. If indicated, please note that years of experience are a guide; we will consider applications from all candidates who can demonstrate ...

REST, gRPC, GraphQL, and OpenAPI, and integrating with 3rd party APIs API security knowledge across OAuth2, SAML, JWT, and related standards Strong grounding in software engineering best practices including git, TDD, OOP principles, SOLID, and design patterns Experience deploying, monitoring, and troubleshooting microservices in a production environment at scale ...

financial markets, especially in delta one, store of value, and/or FICC options trading Experience with Linux‐based, concurrent, high‐throughput, low‐latency software systems Experience with pipeline orchestration frameworks (e.g. Airflow, Dagster) Experience with streaming platforms (e.g. Kafka), data lake platforms (e.g. Delta Lake, Apache Iceberg ...

stakeholder teams to make DeepL's API the obvious and safe choice for global enterprises. We are shifting gears. We are moving from "Software-First" to "Product-First." We don't hire engineers to just close tickets or optimize algorithms in isolation. We hire Missionaries—builders who obsess over ...

real impact from day one, we’d love to meet you. What you’ll do Design, build, and maintain reliable and secure AI-first software optimized for performance at scale Collaborate with AI engineers, product managers, and other team members to implement robust solutions Lead the technical architecture … process Work closely with the founders to align technical implementations with the company’s strategic vision Who you are 5+ years of experience in software engineering, with expertise in backend or full-stack development Proficiency in TypeScript and Python Expertise in automating cloud infrastructure through IaC Experience building event ...

United States Digital Space LLC is seeking software engineers to build next-generation monetization platforms, ad configuration interfaces, and AI-augmented features. You'll work on scalable, full-stack systems handling high-volume data, collaborating with PMs, UX, and cross-site teams to deliver end-to-end solutions. This ...

This hands-on role sits at the intersection of operational excellence and engineering craft. You'll bridge the gap between traditional application support and software engineering by executing scripted remediation, configuration management, feature flag operations, safe, bounded code-level fixes, and runbook automation — all under clearly defined guardrails. ...

building infrastructure used by tens of thousands of merchants. The team is small enough that your decisions have real weight, and senior enough that you'll have strong technical mentorship and career growth support. For engineers who want to work on fintech infrastructure at scale, with ownership ...

Airwallex is looking for a highly skilled product engineer to co-author groundbreaking financial software. In this role, you'll collaborate with leaders to transform strategic visions into market-ready products quickly. The ideal candidate has over 6 years of software engineering experience, particularly in backend architecture ...

Securities Finance Developer (.NET) London | Contract | Inside IR35 | Hybrid Our client is seeking an experienced .NET Developer to join its Equity Technology team in London, working within a specialist Securities Finance technology group delivering strategic ...

Meet DeepL DeepL is a global AI product and research company focused on building secure, intelligent solutions to complex business problems. Over 200,000 business customers and millions of individuals across 228 global markets today ...

legacy migrations. Lead on designing and optimising deployment pipelines. Lead the development of architectural and design solutions for large-scale projects, ensuring that software solutions align with business requirements, long-term technology strategy, and technology standards. Review and provide constructive feedback on code submissions from team members, ensuring alignment … technical standards, maintainability, and high-quality software. Communicate and collaborate with a diverse range of collaborators, including senior management and external partners, and lead or start communities of practice. Demonstrate a production first attitude, continuously considering observability and maintaining Service Level Objectives, while delivering change at pace. Embrace emerging ...

Lead Developer is responsible for providing technical leadership across software development projects, ensuring the successful design, build and delivery of high-quality solutions. The role combines hands-on development with technical oversight, mentoring and stakeholder engagement, helping development teams deliver robust, scalable applications in line with project requirements ...

Hamilton Barnes Associates Limited is seeking a product-minded engineer to join their global trading and investment firm based in Greater London. This role involves building with JavaScript/TypeScript and Node.js, owning technical problems end-to-end, and improving large-scale systems. The ideal candidate will have strong ...

identification and resolution of complex problems by actively engaging with customers and stakeholders across the business, driving innovative solutions Champion best practices in software development, setting a high standard for robustness, reliability, and performance while guiding the team to follow these practices Take ownership of delivering high-impact features … providing guidance, support, and development opportunities for junior and intermediate engineers Matt - Head of Engineering Have at least four years experience working as a Software Developer Have exceptional communication and collaboration skills - we work together and succeed as a team Demonstrate strong problem solving abilities, breaking down complex challenges ...

optimize performance, observability, and operational efficiency What You Bring Bachelor's Degree in Computer Science, Engineering, or related field 6+ years of professional software development experience Experience designing and delivering highly-available, scalable cloud-based systems Backend service experience in multiple managed languages such as Java, Scala, Go, C# ...

stability and resources of an established firm, creating an environment where ambitious individuals can thrive. They are looking for a sharp, product-minded engineer to help scale a fast-growing platform used across the company. This position works across frontend and backend systems, solve performance challenges, and play … Qualifications Strong Java Scripting Trading exposure Docker Desirable Skills Experience with Docker and containerised environments Understanding of distributed systems and scalable architectures Experience with software testing and quality assurance practices Exposure to Rust and/or WebAssembly development Contributions to open-source projects or communities Interest in financial markets ...

meet you. What you’ll be doing We care deeply about the quality of the product we’re building. We’re looking for ambitious software engineers with strong backend and cloud infrastructure experience to build the systems that power billing for modern B2B companies. Here’s what ...

Drive product clarity in ambiguity: define the problem, shape MVP scope, set success metrics, and align stakeholders on what "done" means. Build and ship software AI‐natively across the SDLC (planning, implementation, testing, code review, debugging, and operations), with clear validation practices to maintain correctness and quality. Measure … approved workplace accommodation is in place. Reports to: SVP, AI. What You Bring Required Skills Bachelor’s degree or equivalent experience. 7+ years of software development experience, including ownership of product capabilities in production. Demonstrated, heavy AI‐native delivery: consistent use of AI across the SDLC with concrete examples ...

helping us create an entirely new network for the world's money. For everyone, everywhere. Job Description We are looking for mission-driven senior product engineers to join our Grow squad. We are hiring across two distinct phases of the product lifecycle: scaling a global success and building ...

leading technology firm focused on delivering trusted data and analytics for global financial markets. This role involves building distributed systems and high‐quality software in Python within a collaborative, cross‐functional team. You will contribute to scalable architectures, work with modern tech stacks, and leverage a hybrid work model ...

lower carbon future. What you’ll need: Python Django (or equivalent web framework) Domain modelling HTTP and REST APIs Writing robust and fault‐tolerant software Celery and async processing PostgreSQL Plus experience in the following would be a bonus: AWS Terraform, Packer, Consul As an equal‐opportunity employer ...