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Senior Engineer United Kingdom, London Jobs

314 Job Offers

Senior Network Engineer
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Senior Network Engineer sought by a top global hedge fund to enhance high-frequency trading infrastructure. You will design ultra-low latency networks using Cisco, Arista, and Juniper, with expertise in multicast, BGP, and VXLANs. CCIE/CCDE qualification and Python automation skills are essential...
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200000.00 GBP / Year
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Hunter Bond
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Senior Application Engineer
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Senior Application Engineer sought to become an in-house ServiceNow SME in London. Leverage deep expertise in ITSM, ITOM, and custom app development using JavaScript, AngularJS, and REST APIs. Drive automation with Flow Designer and IntegrationHub while mentoring colleagues. Enjoy a hybrid role w...
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Sportradar
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Senior Software Engineer
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Senior Software Engineer sought to join a high-performing Betting division team in London, UK. You will architect and build highly distributed, real-time systems for industry-leading Sportsbook and Risk Management products. Requires expert-level OOP skills (C#, Java, Python), strong software arch...
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Genius Sports
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Senior Software Engineer - Margin Technology - Assistant Vice President
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Senior Software Engineer (AVP) sought for Margin Technology in London. Join a global team building high-quality solutions using Java, React, and Python. You will develop RESTful APIs with Spring, apply TDD, and work on complex business problems in a fast-paced environment. Benefits include 27 day...
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Citi
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Senior Software Engineer
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Senior Software Engineer sought by a fast-scaling London fintech transforming FX and treasury operations. You will build high-impact, cloud-native trading systems using C#/.NET, SQL, and microservices. Ideal for engineers with 5+ years’ experience in financial technology. Join a collaborative tea...
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80000.00 - 100000.00 GBP / Year
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Harrington Starr
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Senior Software Engineer
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Senior Software Engineer sought by Optimizely to build scalable CMS features and cloud-based systems in London. Requires 8+ years’ experience with C#, .NET, and React, plus strong software design fundamentals. Join a leader in MarTech, working cross-functionally on AI-powered solutions for global...
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Optimizely
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Senior Network Engineer
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Senior Network Engineer sought for a London-based role within a global trading environment. You will design, implement, and support low-latency network architectures, leveraging deep TCP/IP and multicast routing expertise. This position demands strong problem-solving skills and a collaborative mi...
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Chicago Trading Company
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Senior Software Engineer (Digital Showroom)
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Senior Software Engineer (Digital Showroom) sought to own full-stack development in a large-scale serverless cloud environment using Node, React, Next, and GCP. You will architect microservices, champion test-driven quality, and mentor engineers while bridging communication with stakeholders. Enj...
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United Kingdom, London, Nantes, Paris
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Akeneo
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Senior Data Engineer – SC Cleared
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Senior Data Engineer – SC Cleared. 5-month remote contract (Inside IR35) for a UK government client. Must have active SC clearance, deep AWS & Spark expertise (EMR, S3, Lambda), and strong PySpark/SQL skills. Build scalable batch pipelines, implement CI/CD with Terraform, and manage data warehous...
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Whitehall Resources Ltd
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Senior Java Engineer (Kafka, Kubernetes, SpringBoot) – Banking
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Senior Planning Solutions Lead – £60k-£70k + Bonus – Hybrid, London. Drive enterprise-grade planning solutions for a top retail brand, bridging business and tech. Leverage SQL and tools like Anaplan or SAP SAC to design scalable systems. Join a high-performing team shaping commercial performance....
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600.00 - 700.00 EUR / Day
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Salt
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Senior Site Reliability Engineer Manager
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Senior Site Reliability Engineering Manager sought for a UK-based B2B diamond marketplace, offering fully remote work. You will lead a first-class SRE team, owning production reliability, incident management, and automation. Requires expertise in AWS, Terraform, Prometheus, and scripting (Python/...
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Remotestar
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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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Vanguard
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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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Hunter Bond
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Senior Pavement Engineer
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Senior Pavement Engineer sought for the flagship Connect Plus Services (CPS) M25 project in London, UK. You will provide technical design input for highway pavement renewal schemes on the UK’s busiest strategic road network. Requires broad highway engineering knowledge, IEng/CEng status (or withi...
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Egis in the UK
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Senior Kotlin Engineer
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Senior Kotlin Engineer sought for a London-based front office team, building a next-generation cloud-hosted issuance platform for Investment Banking Capital Markets. This hands-on role demands deep expertise in Kotlin, event-driven architectures, and Extreme Programming (XP) practices like mob pr...
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500.00 - 800.00 GBP / Day
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Salt
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Senior ServiceNow Engineer
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Senior ServiceNow Engineer sought for a hands-on role in Greater London, UK, building scalable global platform solutions. You will leverage 5+ years of ServiceNow expertise, including Service Portal, AngularJS, and REST/SOAP APIs, within an Agile environment. Key responsibilities include developi...
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Location
United Kingdom, Greater London
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Salary
700.00 GBP / Day
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Outsource UK
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Senior Java Automation Engineer, FX eTrading
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Senior Automation Engineer, FX eTrading – London. Own backend automation strategy and release quality for critical trading systems. Requires strong Java skills, expertise in server-side and integration testing, and experience in financial services or low-latency environments. Benefits include 27 ...
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Citi
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Senior Data Engineer – Informatica
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Senior Data Engineer (Informatica) needed in London for a key government client. This INSIDE IR35 role demands hands-on AWS & Spark expertise (EMR, S3, Lambda) with strong PySpark/Python and SQL for large-scale batch processing. You will engineer production-grade pipelines, modernize legacy ETL, ...
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Whitehall Resources Ltd
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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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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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120000.00 - 140000.00 GBP / Year
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Arrows Groupe
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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.