1 to 25 of 177 Senior Software Engineer Jobs in London

Senior Software Engineer - Hybrid (1-2 days in HQ) - £ benefits This role will take ownership of a legacy product developed in Microsoft Access (Front End) and SQL. The successful candidate will maintain, document, and optimise the current product and then will - in due course (in partnership with a 3rd party) - design, develop, and implement reusable C# services … industry and is the largest such independent national service provider in the UK today. They are a national business with staff geographically spread across the UK and Northern Ireland. Senior Software Engineer (Access Developer) - Key duties: Take ownership of, and provide day-to-day support for, the current Access-based platform. Maintain and optimise the existing Access … maintainable. Rewrite legacy services to ensure they are modular and reusable in future system developments. Review and refine the SQL database, focusing on building a robust relational database model. Senior Software Engineer (Access Developer) - Essential experience: Proven experience working with Microsoft Access as a front-end tool. Proficiency in VBA for maintaining and enhancing legacy functionality. Strong More ❯

Senior Software Engineer, Mobile - Swift/Kotlin page is loaded Senior Software Engineer, Mobile - Swift/Kotlin Apply locations London time type Full time posted on Posted 7 Days Ago job requisition id R7752 Company Description We're - you might not know our name, but companies like eBay, ASOS, Klarna, Uber Eats, and Sony … and our partners. And we need your help. Join us to build the digital economy of tomorrow. Job Description Global payments are complex and ever-evolving. At Checkout our software engineers develop the next-generation payments technologies that enable our Merchants to boost their acceptance rates, cut processing costs, fight fraud, and create cutting edge technology that enables extraordinary … customer experiences. We're looking for Senior Software engineers who bring fresh ideas, have a curious nature and are passionate about working in an Engineering environment which focuses on building products to achieve the company's strategic goals. You'll get to work with teams from across 's portfolio of products and services who all have a real More ❯

Senior Software Engineer - Threat Protection page is loaded Senior Software Engineer - Threat Protection Apply locations Great Britain - London time type Full time posted on Posted 3 Days Ago job requisition id R5674 Senior Software Engineers - Threat Protection The driving force behind the scanning platform at Mimecast Dive into the forefront of innovation … challenges at immense scale, then this is the role for you!" Responsibilities Experience in a complex, multi-disciplinary environment, delivering products within specific time-scales and engaging with multiple senior stakeholders Deliver AWS based Java services through CI/CD and Infrastructure as code using Terraform Deploy, Monitor and analyze AWS usage, providing recommendations for cost optimisations without compromising … certain obligations to our customers, an offer of employment will be subject to your successful completion of applicable background checks, conducted in accordance with local law. Similar Jobs (3) Senior Software Engineer locations Great Britain - London time type Full time posted on Posted 5 Days Ago Senior Software Engineer - Search Platform locations Great Britain More ❯

Senior Software Engineer/Developer (Full Stack JavaScript) London to £100k Opportunity to progress your career in a senior, hands-on Software Engineer role at a scale-up tech company, that enables smart matching for commercial van drivers and consumers, via job bidding and route optimisation, streamlining processes and delivering CO2 carbon neutral targets … established 10 years, with recent funding of £125 million. You'll be working on complex and interesting systems and can enjoy a range of benefits and perks. As a Senior Software Engineer you'll collaborate as part of an Agile technology team to design and develop, troubleshoot and solve complex software issues to help scale and … understanding of web development practices, tools and technologies You enjoy learning and picking up new things You're flexible and able to adapt to changing priorities You have full software development lifecycle experience including CI/CD and testing You're collaborative with Agile team experience, happy to mentor more junior developers You're likely to be degree educated More ❯

Senior Software Engineer I page is loaded Senior Software Engineer I Apply locations London time type Full time posted on Posted Yesterday job requisition id R7649 Company Description We're - you might not know our name, but companies like eBay, ASOS, Klarna, Uber Eats, and Sony do. That moment when you check out online … and our partners. And we need your help. Join us to build the digital economy of tomorrow. Job Description Global payments are complex and ever-evolving. At Checkout our software engineers develop the next-generation payments technologies that enable our Merchants to boost their acceptance rates, cut processing costs, fight fraud, and create cutting edge technology that enables extraordinary … customer experiences. We're looking for Senior Software engineers who bring fresh ideas, have a curious nature and are passionate about working in an Engineering environment which focuses on building products to achieve the company's strategic goals. You'll get to work with teams from across 's portfolio of products and services who all have a real More ❯

Senior Software Engineer/Developer (C# .Net) London onsite to £150k Are you an experienced C#, backend focussed Software Engineer? You could be progressing your career in a senior, hands-on role at a global Asset Manager with c$3 million under management. As a Senior Software Engineer within the trading … You are collaborative with excellent communication and stakeholder management skills You are degree educated in Computer Science or similar technical discipline What's in it for you: As a Senior Software Engineer/Developer you will receive a competitive package: Salary to £150k Bonus paid every six months based on personal performance (10-25%) Professional development Pension … Health Insurance Gym membership Social events, free fruit, snacks, coffee etc. Apply now to find out more about this Senior Software Engineer/Developer (C# .Net) opportunity. At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come from More ❯

Social network you want to login/join with: Software Engineer, Full Stack (Senior), London col-narrow-left Client: Runna Location: London, United Kingdom Job Category: Other - EU work permit required: Yes col-narrow-right Job Reference: 4751b9357d64 Job Views: 12 Posted: 22.06.2025 Expiry Date: 06.08.2025 col-wide Job Description: We're putting together a talented team … etc). You will work closely with our founders and CTO to help shape the future of Runna, who will support you all along this exciting journey. As a Software Engineer, your role will include: Architect, build, test and deliver new features across the full stack Work with the Product team to identify the most suitable solution for … AWS AppSync DynamoDB, S3, SQS, SNS, EventBridge, SageMaker Postman API tests All the other good stuff: Sentry GitHub Actions Intercom, Mixpanel RevenueCat App Store Connect/Play Store Figma Software Engineer Interview Process Our aim is to keep the interview process as straightforward and enjoyable as possible, and will consist of the following stages: Kick off! (apply below More ❯

Senior Software Engineer, Pricing and Derived Data Senior Software Engineer, Pricing and Derived Data Job Location London Employment type Regular Department Technology Targeted Start Date Immediate DRW is a diversified trading firm with over 3 decades of experience bringing sophisticated technology and exceptional people together to operate in markets around the world. We value … that matters-it's how we do it. DRW is a place of high expectations, integrity, innovation and a willingness to challenge consensus. We are looking to hire a Senior Software Engineer into the Pricing and Derived Data team. We are responsible for building foundational APIs and data services to price all products and related products that … allowing our users to, for example, ensure responsible allocation of capital across the firm. Our systems are used across the organisation by Trading Desk leads, Global Risk Management, and Senior Leadership. We collect, transform, aggregate and disseminate pricing and related derived data, such as: Commodity Price and Yield Curves - Mark-to-market, and Mark-to-model settlement prices Option More ❯

Senior Software Engineer: Java page is loaded Senior Software Engineer: Java Apply locations Cannon Street, London time type Full time posted on Posted 3 Days Ago job requisition id R_14987 Job Title Senior Software Engineer: Java Job Description So, who are we? Hello, we're IG Group. We are a … laser focused on increasing the number of active clients we serve to drive sustainable growth. Your team The role is for the DMA (Direct Market Access) team as a senior engineer. We're responsible for improving, maintaining and supporting our Execution Management System (EMS) which is implemented with an Order Management System (OMS). We work with IG's … hedging providers (banks, liquidity providers, brokers) to allow IG to hedge and IG's clients to trade. Your role in the Team's Success As a Senior Engineer joining our Direct Market Access (DMA) team, you'll be part of a collaborative and dynamic group that values technical excellence, continuous improvement and growth. You'll bring in your More ❯

Senior C++ Software Engineer/Developer (Linux SQL C++17) London/WFH to £110k Global-leading FinTech is seeking a Senior C++ Software Engineer to take ownership of strategic enhancements on their core platform, as well as directly on bespoke client projects. The organisation is a pioneer in the field of cross-asset securities … and derivatives post-trade processing technology, and have created ground-breaking, adaptable software that produces secure and scalable solutions for peak operational efficiency and optimum business performance for their clients. This is an exciting opportunity to accelerate your career alongside established business and technology leaders, and gain/deepen your finance experience. As a C++ Software Engineer … motivated by working on cutting-edge systems and engineering complex solutions You're a positive, proactive team member who excels when working collaboratively You have a strong knowledge of software engineering best practices You're degree educated, having achieved a 2.1 or above in a STEM discipline Ideally you will have experience working in a financial services or trading More ❯

Senior C++ Software Engineer/Developer (Linux SQL C++17) London/WFH to £110k Global-leading FinTech is seeking a Senior C++ Software Engineer to take ownership of strategic enhancements on their core platform, as well as directly on bespoke client projects. The organisation is a pioneer in the field of cross-asset securities … and derivatives post-trade processing technology, and have created ground-breaking, adaptable software that produces secure and scalable solutions for peak operational efficiency and optimum business performance for their clients. This is an exciting opportunity to accelerate your career alongside established business and technology leaders, and gain/deepen your finance experience. As a C++ Software Engineer … motivated by working on cutting-edge systems and engineering complex solutions You're a positive, proactive team member who excels when working collaboratively You have a strong knowledge of software engineering best practices You're degree educated, having achieved a 2.1 or above in a STEM discipline Ideally you will have experience working in a financial services or trading More ❯

Senior Principal Software Engineer - Email Security page is loaded Senior Principal Software Engineer - Email Security Apply locations Great Britain - London time type Full time posted on Posted 13 Days Ago job requisition id R5703 Principal/Senior Principal Software Engineer - Email Security The driving force behind our award-winning Email Security … innovative Email Security team! Our MTA process billions of emails from millions of users on thousands of servers each day!" - Hiring Manager What You'll Do? As Principal/Senior Principal Engineer, you will play a pivotal role in leading the development of our next-generation cloud-based email product. This role involves hands-on engagement throughout the … within the team, fostering collaboration and teamwork. Apply technology trends and industry innovations to our products. Coach and mentor team members in areas of expertise. Experience 10+ years of software development experience. Strong object-oriented programming skills following SOLID principles. Proficient in Java and experienced in building REST/HTTP microservices. Familiarity with Jenkins CI/CD pipelines and More ❯

Senior Software Engineer - Analytics Front Office Senior Software Engineer - Analytics Front Office Job Location London Employment type Regular Department Technology Targeted Start Date Immediate DRW is a diversified trading firm with over 3 decades of experience bringing sophisticated technology and exceptional people together to operate in markets around the world. We value autonomy and … how we do it. DRW is a place of high expectations, integrity, innovation and a willingness to challenge consensus. The UP - Analytics Front Office team is looking for a Senior Software Engineer who relishes working in challenging time-critical environments solving complex problems alongside highly capable peers . Our team operates services providing real-time PnL and … of trading desks each with varying degrees of portfolio and model complexity . While previous experience in the trading and finance industry is beneficial, we're looking for talented software engineers with or without industry-specific expertise . UP - Analytics Front Office primarily operates C# services heavily utilizing RX for LINQ-style composition and asynchronous dispatch. We often reach More ❯

Senior Software Engineer - Back End, Rates & FX page is loaded Senior Software Engineer - Back End, Rates & FX Apply locations London time type Full time posted on Posted 30+ Days Ago job requisition id R3773 The TP ICAP Group is a world leading provider of market infrastructure. Our purpose is to provide clients with access … people strong. We work as one to achieve our vision of being the world's most trusted, innovative, liquidity and data solutions specialist. Role Overview As a Senior Software Engineer at TP ICAP you will be part of a talented team delivering business critical software for the internal broking division and their external customer base. You More ❯

On behalf of the Bank of England, we are looking for a Senior Software Engineer (Inside IR35) for a 12 Month contract based Hybrid in London. The Bank of England is the UK's central bank. Our mission is to deliver monetary and financial stability for the British people. The Bank of England is seeking a Senior Software Engineer to join its Central Bank Digital Currency (CBDC) division. This is a rare opportunity to help shape how money might work in the UK in the future. You'll be part of a small, dynamic team working on greenfield, experimental technology - building prototypes and proof-of-concept systems for the Digital Pound. The work is … ideal for engineers who enjoy learning, solving novel problems, and taking pride in their craft. We're looking for creative individuals who are adaptable, collaborative, and passionate about software engineering. If you enjoy building things and care about the quality of your code, we'd love to hear from you. As a Senior Software Engineer, your More ❯

nCino offers exciting career opportunities for individuals who want to join the worldwide leader in cloud banking. We are seeking a Senior Software Engineer to join our team and to work on a variety of assignments alongside our product and commercial management teams. Software Engineer duties will include cloud infrastructure development as well as working … existing projects and new innovations to support company nCino offers exciting career opportunities for individuals who want to join the worldwide leader in cloud banking. We are seeking a Senior Software Engineer to join our team and to work on a variety of assignments alongside our product and commercial management teams. Software Engineer duties will … insight on their business customers. Clients use our product to solve three mission critical business challenges, namely how to: identify & acquire, verify & onboard and retain & grow customers. Key Responsibilities Software Development Design, develop, and maintain secure, scalable backend services and APIs Work with current tech stack (Kotlin, PHP) while preparing for future migration to .NET/C# or NodeJS More ❯

Senior Software Engineer - Identity and Access Management (f/m/d) Join Contentful as a Senior Software Engineer and take a central role in enhancing our Identity and Access Management ( IAM ) capabilities. Our platform serves billions of requests daily, with customers trusting us with their content-making scalability and security equally crucial. We … our ways of working and our development processes as well as our domain and its components. What you need to be successful? Professional Experience : Proven track record as a Senior Software Engineer in product development, with demonstrated success in building high-traffic APIs and services. Technical Expertise : Strong proficiency in Ruby, TypeScript/Node.js, relational databases ( MySQL More ❯

Senior Software Engineer At UnlikelyAI, we are building the future of AI: one that is reliable, accurate and transparent. Our neurosymbolic technology harnesses the power of LLMs and generative AI, and combines it with classical symbolic technology to produce hallucination-resistant artificial intelligence for high-trust applications. To support our rapidly increasing commercial momentum, we're looking … for an experienced and pragmatic software engineer to join our exceptional team. This role is ideal for someone who has successfully taken products from prototype to production and enjoys collaborating directly with customers to understand their needs and shape impactful solutions. You'll work on a range of customer-facing and internal projects, applying your engineering skills to … complex, often novel problems. Your ability to write clean, efficient code and your comfort in navigating ambiguity will be key as we continue to develop advanced reasoning capabilities in software systems. You'll collaborate closely with a multidisciplinary team of software engineers, research scientists, and language engineers in a highly cross-functional environment. This is a hands-on More ❯

Social network you want to login/join with: Senior Software Engineer (Content Delivery & Security), London col-narrow-left Client: bunny.net Location: London, United Kingdom Job Category: Other - EU work permit required: Yes col-narrow-right Job Reference: 3384ef32c222 Job Views: 7 Posted: 22.06.2025 Expiry Date: 06.08.2025 col-wide Job Description: We are on a mission to … take pride in their work, and aren't afraid to challenge what's possible. Because everyone deserves a better internet. And we're here to help it hop faster. Senior Software Engineer ( Content Delivery & Security) Our stack handles millions of requests per second across 119+ PoPs on six continents. Your job? Making it faster, safer, and more … efficient. As a Senior Software Engineer on our Content Delivery & Security team, you'll work on core CDN and DNS systems while helping build out our greenfield Shield product, focused on WAF, DDoS mitigation, and bot protection at a global scale. You'll design and optimize low-level systems that accelerate clean traffic and stop attacks in More ❯

Senior Software Development Engineer, Amazon Stores Job ID: Services LLC Come build the future as a Senior Software Development Engineer at Amazon, where you will be inspired working along best-in-class inventors and innovators! You will have the opportunity to create meaningful experiences that deliver on the ever-evolving needs of our customers … and your work will impact millions of people around the world. As an Amazon Senior Software Development Engineer, you will solve unique and complex problems at a rapid pace, utilizing the latest technologies to create solutions that are highly scalable. You will find that there is an unlimited amount of opportunities within Amazon, where developing your career … We are committed to making your work experience as enjoyable as the experiences you'll be creating for our customers. Apply now and you will be eligible for Amazon Senior Software Development Engineering positions that are based on your preferred location, team, tech stack, domain, language and more. We're hiring across Amazon Stores in the United States More ❯

Senior C++ Software Engineer We are looking for a Senior C++ Software Engineer with extensive commercial software development experience using C++ ideally within the finance domain. What you will be doing: As a Senior C++ Software Engineer, you will be involved in: Analysis of user requirements and translation into solution … Implementation of new features and feature enhancements Leading code reviews and enforcing best practice within a small, agile, focused team Mentoring junior colleagues What you will need: Extensive commercial software development experience using C++ SQL experience Unix/Linux experience Relevant degree in a numeric discipline, or equivalent work experience Excellent written and spoken English By applying to this More ❯

Senior Software Engineer - France Global Payroll Rippling gives businesses one place to run HR, IT, and Finance. It brings together all of the workforce systems that are normally scattered across a company, like payroll, expenses, benefits, and computers. For the first time ever, you can manage and automate every part of the employee lifecycle in a single … of America's best startup employers by Forbes. We prioritize candidate safety. Please be aware that all official communication will only be sent addresses. About the role As a Senior Software Engineer for the France Global Payroll team, you will play a critical role in advancing our full-service payroll platform that handles payroll configuration and calculations … drive initiatives by creating new product functionality from the ground up as well as rearchitecting key components of our platform to help us scale. If you are an experienced engineer looking for high impact and autonomy, come build the future of payroll with us! What you will do Partner with design and product management leaders to shape and drive More ❯

Senior Software Engineer At Flexciton, we work with high-tech factories built with investments worth hundreds of millions of dollars, producing advanced chips at the atomic level. It can take up to nine months to fabricate these cutting-edge products. We are proud to be the only SaaS product in the world that plans and schedules production … With operations across the US, Europe, and expansion into Asia, we are on a path to realise our vision for the Autonomous Factory. Job Summary We're seeking a Senior Software Engineer to drive complex technical initiatives and deliver high-quality solutions across our manufacturing automation platform. As an experienced individual contributor, you'll work independently on … and enhance our REST APIs and microservices Implement data science workflows in production-grade Python Create reusable components that support rapid development cycles Engineering Quality Apply and advocate for software engineering best practices including testing and CI/CD Contribute to system reliability, performance optimisation, and maintainability improvements Collaborate with optimisation engineers to implement mathematical models in code Participate More ❯

celebrate together. If you want to advance the world of fintech, we'd like to ask you: Are you FIS? About the role: We are looking for an experienced Senior C++ Software Engineer to help grow and enhance our PTP software platform. The candidate will work on strategic enhancements to the platform as well as on … PTP Platform is a leading-edge, cloud-based Securities Processing solution that provides trade lifecycle processing for a wide range of global financial institutions. About the team: As a Senior C++ Software Engineer, you'll be part of our PTP Platform development group. The group is broken into smaller scrum teams that each hold responsibility for a … area of system functionality. You'll become involved with all phases of the development lifecycle and take ownership of key functional areas. What you will be doing: As a Senior C++ Software Engineer, you will be involved in: Analysis of user requirements and translation into solution design Estimating and breaking down tasks into manageable chunks Implementation of More ❯

Senior Software Engineer (Golang) -London Senior Software Engineer - Golang - London/Home office The company: Through the power of AI and Big Data this company have developed a number of data driven tools and platforms aimed at delivering a transparent financial solution. Focusing purely on sustainable investment! If you want the leave the planet … ethos of this company. This group has 4 arms: A Data Provider: Assessing the performance and sustainability of companies worldwide. AI: An advisory and technology company with an AI engineer for forecasting investment opportunities Asset Management: Investment management company investing in sustainable equities They focus on R&D of AI, ML, Data, Finance and sustainability. You will be based … and other teams (Specialists, Researchers, Product owners, designers etc) Have freedom to govern your own tasks and spend time on new developments and research. The candidate: Extensive experience in Software Engineering Experience with Go and/or Python make you the ideal candidate. Java also interesting You have a deep understanding of system design, data structures, and algorithms. Comfortable More ❯