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Senior Engineer United Kingdom, London Jobs (Hybrid work)

208 Job Offers

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Senior AI Engineer (AI Platform)
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ASOS seeks a Senior AI Engineer in London to build and scale shared AI platform capabilities on Azure, focusing on agentic AI, LLM orchestration and reusable frameworks. Requires strong Python, GenAI production experience and CI/CD skills.
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ASOS
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Senior Flutter Engineer
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AJ Bell seeks a Senior Flutter Engineer in London (hybrid) to build a next-gen investing app for 500,000+ customers. Requires strong mobile DevOps, architecture skills, and CI/CD expertise. Benefits include 26 days holiday, 7% pension, and share schemes.
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United Kingdom, London / Hybrid
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AJ Bell
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Senior AI/ML Engineer
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Senior AI/ML Engineer role in London to own models and pipelines turning weather and satellite data into risk and market signals. Requires deep learning, Python scientific stack (PyTorch, xarray) and end-to-end delivery.
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Treefera
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Senior Machine Learning Engineer (MLOps)
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ASOS seeks a Senior ML Engineer (MLOps) in London to build scalable ML platforms and backend services powering search and personalisation for millions. Requires strong Python/Java, Kubernetes, AWS/GCP and CI/CD skills.
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ASOS
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Senior Fullstack Engineer - UK
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Senior Fullstack Engineer role in London to build AI healthcare tools. Requires 5+ years with React, TypeScript, Next.js, Python, MongoDB and Redis. Own features end-to-end and shape scalable APIs.
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Heidi
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Senior Product Security Engineer
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Trainline seeks a Senior Product Security Engineer in London to own the product security roadmap and application vulnerability management. Requires mobile/API security expertise, OAuth 2.0, and hands-on SAST/DAST testing.
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Trainline
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Senior Software Engineer - Credit
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LemFi seeks a Senior Software Engineer in London to build high-reliability Go backend services powering credit products for underserved communities. Requires fintech and credit domain experience, distributed systems expertise, and a strong correctness mindset.
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LemFi
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Senior Machine Learning Engineer (Recommendations/Search)
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ASOS seeks a Senior ML Engineer in London to build production recommendation and search systems. Requires deep learning expertise (PyTorch/TensorFlow), MLOps skills, and mentoring experience. Enjoy hybrid work, private medical care, and a great discount.
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ASOS
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Senior Field Product Engineer
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Senior Field Product Engineer role in London with Radiant, building AI-native infrastructure platforms. Requires strong cloud, Kubernetes, and distributed systems engineering skills plus direct customer-facing technical work. Drive product priorities from field feedback.
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Radiant
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Senior Software Engineer - Discover & Book
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Senior Software Engineer role in London to build fast, accessible, responsive web experiences using modern frontend tech. Shape customer journeys, evolve design systems and improve Core Web Vitals.
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loveholidays
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Senior Software Engineer
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Quantexa seeks a Senior Software Engineer in London with commercial Scala and functional programming experience. Design and deliver high-quality solutions to complex problems using big data tech like Spark. Join a diverse, innovative team.
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Quantexa
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Senior Software Engineer
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Join Gigaton as a Senior Software Engineer in London and build AI-driven systems cutting carbon emissions in heavy industry. Work with Python, Terraform and AWS to optimise industrial plants.
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Gigaton
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Senior ML Platform Engineer (Agentic Platform)
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Preply seeks a Senior ML Platform Engineer in London to build a durable agentic platform with secure tool layers, state management and observability. Requires 5+ years backend/ML infra, strong Python and hands-on GenAI agent experience.
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Preply
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Senior ML Platform Engineer (GenAI Platform)
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Preply seeks a Senior ML Platform Engineer in London to build a GenAI platform with unified gateways, evaluation systems, and observability. Requires 5+ years in backend/ML infrastructure, strong Python, and hands-on Agentic AI expertise.
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Preply
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Senior Machine Learning Engineer (Customer/Marketing)
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ASOS seeks a Senior Machine Learning Engineer in London to build and scale ML systems for customer growth, marketing, pricing and personalisation. Requires Python, MLOps, Spark and PyTorch/TensorFlow expertise.
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ASOS
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Senior Modelling Engineer I
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Join Runna's fast-growing team as a Senior Modelling Engineer in London. Build and optimise training algorithms in Python for millions of runners. Enjoy flexible working, free subscriptions, and private health insurance.
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Runna
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Senior Civil Engineer
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AECOM seeks a Senior Civil Engineer in London to lead infrastructure design for complex developments. Requires UK consultancy experience, Civil 3D and InfoDrainage skills, and progress toward Chartered status.
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AECOM
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Senior Software Engineer | Platform
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ARQ seeks a hands-on Senior Software Engineer for its Platform team in London. Build secure, highly-available infrastructure using Kubernetes, IaC, and typed languages like TypeScript or Go. Competitive salary, stock options, hybrid work.
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ARQ
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Senior Software Engineer (Java)
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Senior Java Backend Engineer role in London at ARQ, a fast-growing fintech. Build scalable microservices with Java 25, Spring Boot and Postgres. Requires strong Java skills and complex product experience. Competitive salary, stock options, hybrid office.
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ARQ
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Senior Electrical Engineer
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Senior Electrical Engineer needed for HS2's Old Oak Common station in London. Requires 10+ years experience in rail station electrical design, BIM proficiency, and knowledge of British and Rail Standards. Join Anthro's dynamic MEPHFC design team.
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Egis Group
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About the Senior Engineer role

Senior Engineer jobs represent the pinnacle of technical expertise and leadership within the engineering field. These roles are designed for seasoned professionals who possess deep, specialized knowledge and are entrusted with guiding complex projects, making high-stakes architectural decisions, and mentoring the next generation of talent. Unlike entry or mid-level positions, senior engineers are expected to operate with significant autonomy, translating broad business objectives into robust, scalable, and innovative technical solutions. They serve as the critical bridge between strategic vision and practical execution, ensuring that engineering outcomes align with long-term organizational goals.

Professionals in these roles typically shoulder a comprehensive set of responsibilities that extend beyond pure coding. A core duty is systems architecture and design, where they define the technical blueprint for major initiatives, selecting appropriate technologies and frameworks to ensure performance, security, and maintainability. They are deeply involved in solving the most challenging and ambiguous problems, applying advanced analytical skills to diagnose issues and devise elegant solutions. Leadership is a fundamental aspect, encompassing code and design reviews, technical mentorship for junior team members, and fostering a culture of engineering excellence and continuous improvement. Furthermore, senior engineers often own the entire lifecycle of critical system components, from conception and development through deployment, monitoring, and iterative enhancement.

The typical skill set for senior engineer jobs is both broad and deep. Mastery in one or more programming languages and relevant technology stacks is a given. However, what truly distinguishes a senior engineer is their proficiency in architectural patterns, such as microservices or event-driven design, and a strong grasp of cross-cutting concerns like security, scalability, and observability. They are expected to have extensive experience with modern development practices, including DevOps principles, CI/CD pipelines, infrastructure as code, and automated testing strategies. Equally important are the soft skills: exceptional communication to articulate complex ideas to technical and non-technical stakeholders, strategic thinking to anticipate future challenges, and a collaborative mindset to work effectively across multidisciplinary teams. A proven track record of driving projects to successful completion and a mindset geared towards innovation and efficiency are common requirements.

Ultimately, senior engineer jobs are for those who are not just builders but visionaries and stewards of technology. They play a crucial role in shaping the technical direction of products and services, mitigating risk, and ensuring that engineering practices evolve to meet emerging demands. For organizations, hiring for these positions is an investment in stability, innovation, and sustained competitive advantage. For engineers, these roles offer the opportunity to have an outsized impact, lead transformative work, and define the future of technology within their domain.