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Senior Software Engineer United Kingdom Jobs

158 Job Offers

Senior Software Engineer
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Senior Software Engineer sought by Collinson, the global leader behind Priority Pass and loyalty solutions. You will design scalable, cloud-native applications using TypeScript (Node.js & React) in London. Requires 5+ years of full-stack experience, expertise in AWS, event-driven architectures, a...
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United Kingdom , London
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Collinson
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Senior Python Software Engineer
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Senior Python Software Engineer sought to support R&D tooling, data infrastructure, and CI/CD pipelines in Bristol, UK. Requires 7+ years Python experience, GitLab CI/CD, and Agile workflows. Key benefits include technical mentorship, code reviews, and ensuring software reliability, security, and...
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United Kingdom , Bristol
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65000.00 - 75000.00 GBP / Year
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Zenovo
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Senior Software Engineer – Identity & Authentication
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Senior Software Engineer – Identity & Authentication sought for Vanguard’s London team. This hands-on full-stack role involves building cloud-based MFA and authentication platforms using NestJS and React. You will design secure APIs and infrastructure in a regulated environment. Benefits include ...
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United Kingdom , London
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Vanguard
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Senior Software Engineer
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Rapid7 seeks a Senior Software Engineer for its Belfast Labs team to build world-class security data platforms. You will develop critical capabilities like vulnerability intelligence and Project Sonar using Python, Go, or Java. The role demands expertise in Kubernetes, Terraform, AWS (S3, EC2, RD...
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United Kingdom , Belfast
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Rapid7
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Senior Frontend Software Engineer
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Senior Frontend Software Engineer sought by an elite London trading firm with an unlimited tech budget. You will build high-scale, low-latency solutions using C++ 20/23, optimizing ML pipelines processing millions of data points per second. Ideal candidates have 2-15 years of C++ experience, stro...
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United Kingdom , London
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Hunter Bond
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Senior Software Engineer
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Join a world-class team as a Senior Software Engineer, working remotely from the UK. You’ll master modern C++ and transition into ML, with a focus on quality over long hours. We seek 3+ years of C++ experience, a top-tier degree, and strong data structures skills. Enjoy a six-figure salary, real ...
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United Kingdom
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Oho Group Ltd
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Senior Software Engineer, Embedded Software Automation and Tools
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Senior Software Engineer, Embedded Software Automation and Tools – Cambridge, UK. Join Roku to develop and maintain E2E automation frameworks and tools using Python and REST APIs. Requires 10+ years of automation experience, Linux proficiency, and AI adoption expertise. Benefits include healthcar...
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United Kingdom , Cambridge
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Roku
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Senior Python Software Engineer
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Senior Python Software Engineer sought to drive R&D tooling, CI/CD pipelines, and internal systems in Bristol. Requires 8+ years Python experience across Linux/Windows, GitLab CI/CD, and Agile workflows. Key skills include wxPython, ETL pipelines, and database optimisation. Join a collaborative t...
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United Kingdom , Bristol
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70000.00 - 80000.00 GBP / Year
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Zenovo
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Senior Software Engineer
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Senior Software Engineer sought by SourceWhale, the Financial Times’ fastest-growing software company in Europe 2025. You will lead complex technical delivery, drive architectural excellence, and mentor engineers in a remote/hybrid UK-based role. Key requirements include strong Python backend ski...
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United Kingdom , London
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SourceWhale
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Senior Software Platform Engineer
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Senior Software Platform Engineer sought by a top growth investment firm in London. You'll build a modern, AI-first internal platform, working across software and infrastructure with Python and GCP. This role offers high ownership, mentoring junior engineers, and contributing to agentic AI workfl...
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United Kingdom , London
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120000.00 - 140000.00 GBP / Year
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Arrows Groupe
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Principal AI Software Engineer, Senior Vice President
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Principal AI Software Engineer, SVP role in London. Architect scalable backend systems for advanced AI tools, leveraging expert Python, FastAPI, and Generative AI frameworks like LangChain. Requires deep ML knowledge and full lifecycle ownership. C++ expertise is a bonus. Benefits include 27+ day...
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United Kingdom , London
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Citi
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Senior Software Engineer (AVP) – Margin Technology
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Senior Software Engineer (AVP) role in Citi’s Margin Technology team, based in Belfast. You will build high-impact financial systems using Java, React, and Python, with expertise in RESTful APIs, TDD, and clean code. Join a global team solving complex problems at massive scale, with hybrid work, ...
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United Kingdom , Belfast
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Citi
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Senior Embedded Software Engineer
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Senior Embedded Software Engineer sought to develop advanced wireless communication systems in Whiteley, UK. This hands-on role combines embedded C development with FPGA design (VHDL/Xilinx) across the full product lifecycle. Ideal for engineers skilled in Linux, electronics, and test equipment, ...
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United Kingdom , Whiteley
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Codan Limited
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Senior Algo Trading Software Engineer (VP)
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Senior Algo Trading Software Engineer (VP) at Citi in London. Engineer high-performance, low-latency electronic execution systems using Java, C++, or Rust. Collaborate with traders and quants to drive innovation in global finance, leveraging AI-powered tools and Agile practices. Enjoy 27 days lea...
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United Kingdom , London
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Citi
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Senior Software Engineer, Subscriptions
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Senior Software Engineer, Subscriptions – Manchester, UK. Join Roku, the #1 TV streaming platform, to develop core features for the Roku OS using C++, Embedded Linux, and ReactJS. You will design and ship high-quality software, write tests, and collaborate cross-functionally. Enjoy global wellnes...
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United Kingdom , Manchester
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Roku
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Senior Software Engineer
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United Kingdom , London
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80000.00 - 95000.00 GBP / Year
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Orbis Consultants
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Senior Software Engineer
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United Kingdom , London
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150000.00 - 160000.00 GBP / Year
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Orbis Consultants
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Senior Software Engineer
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United Kingdom , London
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Optimizely
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Senior Software Engineer, Ad Auctions
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United Kingdom , Cambridge
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Roku
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Senior Software Engineer
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Senior Software Engineer sought for a fully remote UK role with a cloud-native leader in child safety technology. You will design and build high-performance backend services using Golang and GCP, alongside frontend work with TypeScript and React. Key requirements include microservices, SQL, CI/CD...
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United Kingdom
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75000.00 - 85000.00 GBP / Year
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Premier Group
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About the Senior Software Engineer role

Senior Software Engineer jobs represent a pivotal career stage where technical expertise converges with leadership and strategic influence. These professionals are the cornerstone of software development teams, responsible for designing, building, and maintaining complex, scalable systems that power modern businesses. Moving beyond foundational coding tasks, senior engineers architect solutions, make critical technology decisions, and mentor others, ensuring both product excellence and team growth.

Typically, individuals in these roles undertake a broad spectrum of responsibilities. They are deeply involved in the full software development lifecycle, from requirement analysis and system design to implementation, testing, deployment, and ongoing optimization. A core duty is architectural design, where they choose appropriate technologies, design patterns, and frameworks to create robust, secure, and scalable applications. This often involves building backend services, APIs (RESTful or GraphQL), and dynamic frontend interfaces. They ensure code quality through rigorous practices like code reviews, writing comprehensive tests (unit, integration), and establishing CI/CD pipelines. Furthermore, senior software engineers frequently collaborate with cross-functional partners, including product managers, designers, and DevOps specialists, to translate business needs into technical specifications and seamless user experiences.

The skill set for these jobs is both deep and wide. Proficiency in one or more core programming languages (such as Python, Java, JavaScript/TypeScript, C#, or Go) is essential, alongside expertise in relevant frameworks and libraries for both frontend (e.g., React, Angular) and backend development. A strong grasp of data structures, algorithms, and system design principles is mandatory. Experience with cloud platforms (AWS, Azure, GCP) and their services for computing, storage, and networking is increasingly standard. Knowledge of database technologies, encompassing both SQL (PostgreSQL, MySQL) and NoSQL (MongoDB, DynamoDB) systems, is crucial. Beyond technical acumen, senior roles demand excellent problem-solving abilities to debug complex issues and optimize performance. Soft skills are equally important; effective communication to articulate technical concepts to non-technical stakeholders, project leadership, and the ability to mentor junior developers are key differentiators.

Common requirements for Senior Software Engineer jobs usually include a bachelor’s degree in computer science or a related field, although substantial equivalent experience is often acceptable. Most positions seek candidates with 5+ years of professional software development experience, demonstrating a proven track record of shipping and maintaining production systems. Employers look for individuals who exhibit end-to-end ownership of projects, a passion for continuous learning in a rapidly evolving field, and a strategic mindset focused on long-term maintainability and business impact. For those seeking to lead through technology and drive meaningful innovation, senior software engineer jobs offer a challenging and rewarding career path at the heart of the digital world.