1 to 25 of 47 Remote Senior Software Engineer Jobs in the Thames Valley

About Us Software helps to enable the world-leading science performed at Diamond. Our software systems facilitate operations at all levels, including the low-level control of synchrotron and beamline hardware, the planning, execution and monitor of experiments, data archiving and retrieval, data processing and visualisation, the application for beamtime, and capture of remote experiment plans and samples. … Our software engineers work alongside our scientists to develop innovative and robust solutions to keep Diamond at the forefront of scientific research. At Diamond we are currently undertaking a major upgrade of the facility, known as Diamond-II. Diamond-II will combine a new machine and new beamlines with a comprehensive series of upgrades to optics, detectors, sample environments … sample delivery capabilities and computing, which will ultimately generate an even more brilliant light source at a higher energy. About the Role We now have an opportunity for a software engineer within the DAQ group team that supports and develops software for Diamonds Soft Condensed Matter(SCM)and Crystallography(X)science groupson a 4-year fixed term 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/Developer (Python FastAPI Data) London to £90k Are you a data centric Software Engineer with strong Python and SQL skills? You could be progressing your career in a senior, hands-on role at a fast growing, global Insurance Underwriting technology provider that focusses on developing a complex SaaS calculation platform … for rapidly growing Cybersecurity insurance markets. As a Senior Software Engineer you will design and develop data centric backend services for the core platform with a focus on Python coding and building FastAPIs within an Azure environment with Databricks. You'll participate in the design and implementation of advanced mechanisms for data ingestion, transformation, mass parallel orchestration … s a hybrid work from home model with three days a week in the high spec London, City office with rooftop bar. About you: You have strong Python backend software engineering skills You have experience of building FastAPIs You have a good knowledge of public cloud services, they're using Azure but experience with AWS or GCP is fine More ❯

Senior Software Engineer (TypeScript Full Stack) London/WFH to £100k Do you enjoy problem solving and working with a range of technologies including functional programming languages such as Elixir, using the right tool for the job? You could be progressing your career in a senior, hands-on Software Engineer role at a successful … office per week) Vitality Healthcare Continuous career development and learning opportunities Influential role as part of a small, close knit team Complex and interesting work Your role: As a Senior Software Engineer you will take ownership, working on technically challenging Greenfield development projects. You'll be working on complex problems with scalability and reliability in mind, across … educated in Computer Science or similar STEM discipline, having achieved a 2.1 or above from a Russel Group/Oxbridge or top 100 global university You are an experienced software engineer with a strong knowledge of best practices and Computer Science fundamentals and experience of delivering complex, data centric software You have advanced analytical and problem solving More ❯

Senior Software Engineer | Legacy to Modern | C#, .Net | SaaS Data A fast-growing SaaS business is investing heavily in its tech platform and building out a senior engineering hub in London. They’re on the lookout for a Senior Software Engineer to help drive modernisation, set technical direction, and mentor squads as they … scale. This is a senior, hands-on role. You’ll design and build applications, lead migrations away from legacy frameworks, and ensure the platform is stable, scalable, and fit for the future. Expect to spend plenty of time coding, alongside leading migrations and leading/mentoring 4 engineers. You will have complete autonomy for all things C# .NET in … Comfortable balancing legacy upkeep with platform modernisation Confident with IIS, AWS, TeamCity, Octopus Deploy, SQL Server Bonus points for exposure to Angular or Telerik libraries Prior experience as a senior engineer in SaaS or product-led teams Someone who enjoys mentoring, influencing direction, and staying hands-on Location & working style: Hybrid London role, with 1–2 days a More ❯

Senior Software Engineer/Developer (Java AWS) London/WFH to £100k Opportunity to progress your career in a senior, hands-on Software Engineer role at a global FinTech/CFD trading company that has been consistently voted as one of the UKs top employers. As a Senior Software Engineer you … You'll be working with a modern tech stack using Java, Spring Boot, CI/CD, Kubernetes, AWS, EKS and Grafana/Splunk. About you: You have advanced backend software engineering experience with Java, Spring Boot, REST, Postgres, Redis You have experience of running production workloads on Kubernetes (Amazon EKS preferred) You have a good knowledge of DevOps practices … annual budget for organising events and projects that foster an open, diverse and inclusive culture Plus a range of other perks Apply now to find out more about this Senior Software Engineer/Developer (Java AWS Spring Boot) opportunity. At Client Server we believe in a diverse workplace that allows people to play to their strengths and More ❯

Senior Software Engineer We’re supporting a pioneering technology company who are building some of the most advanced systems in the world. They’re now looking for a Senior Software Engineer to join their growing team and play a key part in developing cutting-edge solutions. This is a fantastic opportunity to work on … unique challenges that will push the boundaries of what’s possible in computing. You’ll collaborate with highly skilled engineers and scientists, developing the software that drives complex hardware platforms and contributes to world-class innovation. The role As a Senior Software Engineer, you’ll work across a variety of technical areas, including: Designing and extending More ❯

Senior Software Engineer Key Technologies: C#, .NET, React, AWS, Docker, Kubernetes City of London, United Kingdom Perm Role: £80,000 - £120,000 Harrington Starr has partnered with a Global Financial Services Vendor and they are looking for a Senior C#, .NET Software Engineer to join their growing team! This role provides the perfect opportunity … communication skills. Unrestricted right to work in the UK. This role offers hybrid working, with an office location based in the City of London. This role will suit a Senior Software Engineer, with expert C#, .NET experience and commercial use of React having a direct impact from the get-go. Apply below and if you have any More ❯

At a Glance Capsa is an AI platform that accelerates due diligence and deepens insights for Private Equity funds. We are hiring senior software engineers who are comfortable contributing across all layers of the application and developing features end to end. Details: Role : Senior Software Engineer - Full Stack Location : London, UK (Hybrid, In-Person … defense companies like QinetiQ and retail tech startups such as Standard AI. The entire team consists of early-stage startup veterans passionate about building exceptional products. The Role A senior software engineer at Capsa is expected to own projects and features from conception to production, working across the stack to deliver improvements to our AI platform. Key … vision and will have a direct impact on its success. Have the opportunity for fast career growth. Enjoy yourself! Apply if: You have 4+ years of experience as a software engineer in a venture backed startup or top tech firm. You have taken entire products or features from ideation to production and you've measured their impact. You More ❯

Senior Backend Engineer – Build Tech That Powers Global Insights Location: London - Hybrid Salary: Up to £110,000 + benefits We are partnering with a fast-growing tech company that’s transforming how data is collected and used across industries. They’ve built a platform that simplifies complex research workflows, and they’re now looking for a Senior Backend Engineer to lead the charge on scalable, secure, and high-performance systems. This is a hands-on leadership role for someone who thrives in a collaborative, product-driven environment and wants to shape the future of a platform used by global clients. What you’ll do as Senior Software Engineer: Lead the design and … plus) Excellent communication and leadership skills If you want to build tech that matters and lead with impact in a company that values innovation, trust, and ownership then this Senior Software Engineer role is your chance to make a real difference. ** Unfortunately, due to the volume of applications, not all submissions will receive feedback More ❯

Senior Software Engineer (Python) Hybrid London (1–3 days per week) Up to £80,000 + Benefits Are you a passionate Python engineer who thrives on building scalable, high-quality software? We’re working with a multi-award-winning digital agency , recognised as one of the Sunday Times Best Places to Work, that’s looking … for a Senior Software Engineer (Python) to help shape the next generation of their data-driven tools and products. 💡 Why this role? Work at the intersection of data, automation, and AI , delivering tools that drive measurable impact for global brands. Join a collaborative, innovative engineering culture where learning, experimentation, and technical excellence are at the core. Hybrid … technical bar across the team. Staying hands-on while contributing to the architectural direction and long-term roadmap. 🎯 What we’re looking for: 5+ years of experience as a Software Engineer, ideally in Python (3.10+). Proven experience developing cloud-native applications (GCP or AWS). Strong understanding of CI/CD pipelines (e.g. GitHub Actions) and containerisation More ❯

Senior Software Engineer If you would like to know a bit more about this opportunity, or are considering applying, then please read the following job information. We re supporting a pioneering technology company who are building some of the most advanced systems in the world. They re now looking for a Senior Software Engineerto join … fantastic opportunity to work on unique challenges that will push the boundaries of what s possible in computing. You ll collaborate with highly skilled engineers and scientists, developing the software that drives complex hardware platforms and contributes to world-class innovation. The role As a Senior Software Engineer, you ll work across a variety of technical More ❯

About the Job Senior Software Engineer- Hybrid (2 days on site)- London- £100K+ Incredible Benefits Are you passionate about working with cutting-edge technology and looking to grow your skills in a forward-thinking environment? We’re currently looking for Senior Software Engineers who enjoy being hands-on and thrive on solving complex technical challenges. … the personal insurance space. The venture combines the agility and innovation of a start-up with the stability and backing of a major UK financial services provider. As a Senior Software Engineer , you’ll collaborate closely with Product Owners, subject matter experts, and other team members to deliver high-quality outcomes through continuous development and release cycles. More ❯

Software Engineer – Python/FastAPI/React/Functional programming/Typescript Location: London, UK (Hybrid) Type: Full-time Level: Mid to Senior Salary: £70,000 to £100,000 About the Role: This startup is building a cutting-edge platform to transform how engineers design physical products. Instead of creating one solution at a time, this system … is a spin-out from one of the UK’s most successful startups, built by top-tier engineers and developers from industry leading teams. We’re looking for a software engineer who enjoys writing clean, functional code and is genuinely passionate about real-world engineering not just building software, but helping change how things are designed and … Python for geometry, simulation, and data workflows Develop responsive, performant frontends using React and TypeScript Work closely with domain experts (engineers, designers) to translate complex physical problems into usable software features Follow functional programming practices to write testable, composable code Own features from idea to implementation to deployment Contribute to architectural decisions in a fast-moving, early-stage product More ❯

Senior Software Developer | £100,000 | London | Financial Services Overview: A leading financial services organisation is seeking a Senior Software Developer to drive the design, development, and delivery of critical technology solutions across its operations. This high-impact role sits at the heart of business transformation, focused on building scalable systems to support reporting, compliance, and operational … patterns, development standards, and quality controls Lead and mentor developers, managing performance and growth Contribute to technology strategy, promoting innovation and best practices Essential Skills & Experience: 8+ years in software development within financial services or other complex enterprise environments is a must have Skilled in C#, .NET Core, Angular (v17+), SQL Server, Azure, microservices, and Power BI Experience in … unit testing, test automation, and Agile delivery Knowledge of compliance, regulatory reporting, and enterprise operational processes Proven experience delivering complex software solutions Strong leadership and stakeholder management skills Bonus: Python, Azure Data Factory/Databricks, data analysis, and COTS platforms Package: £100,000 15% non-contributory pension Hybrid working (3 days per week) Performance-based bonus scheme Comprehensive benefits More ❯

Senior Django Developer | FinTech | Permanent | Hybrid | Central London Senior Software Engineer Start-up Fintech 2 days a week in the office (Central London) B2B FinTech in Central London are looking for a Senior Django Developer to help design, build, and scale their web applications. You’ll be part of a cross-functional product team responsible … for the full development lifecycle, from concept to deployment, building high-quality, performant software used by some of the world’s leading financial organisations. As a senior member of the engineering team, you’ll collaborate closely with product managers, front-end developers, and QA engineers, while mentoring others and driving best practices across the codebase. If you’re More ❯

Software Engineer – Next-Generation Derivatives Risk Platform 📍 Location: London (Hybrid – 1 day/week in office, flexibility for the right candidate) 💰 Day Rate: £850 per day 🧾 IR35: Outside 🗓️ Interview Process: Starts 12th November 2025 🚀 Start Date: 5th January 2026 CV's are not being reviewed until WC 3rd November We’re partnering with a global investment bank to … hire an exceptional Software Engineer to join a flagship team delivering a next-generation, high-performance derivatives risk platform . This is a mission-critical front-office role working on real-time distributed systems with exceptional technical standards. You’ll be part of a high-calibre team solving complex engineering challenges and shaping the future of risk technology … DevOps, CI/CD Emerging tech: WebAssembly, AI integration, and AI frameworks Systems: Cross-platform, distributed, scalable real-time environments This is a genuine technologist’s role — building critical software that combines engineering precision, scalability, and innovation. What We’re Looking For Very strong expertise in one of C#, Python or Java , ideally with working knowledge of another. Rust More ❯

Senior Software/Platform Engineer (DevOps) AI-driven Healthcare Hybrid (Oxford) - Contract Role Im excited to be supporting a pioneering healthtech company thats redefining how cardiovascular disease is detected and managed - using advanced AI and cloud-based diagnostics to save lives. Theyre looking for a Senior Software/Platform Engineer (open to candidates from … DevOps, software engineering, or cloud backgrounds) to help scale their secure, high-performance SaaS platform used by clinicians and healthcare systems worldwide. Youll work on tech that genuinely impacts patient outcomes. Join a mission-led team combining AI, medical imaging, and cloud engineering. Modern stack including Python, TypeScript, Docker, Azure, and Kubernetes. Strong culture of innovation, continuous delivery, and … collaboration. Solid software engineering skills (Python/TypeScript/JS). Experience building and deploying cloud-native applications. A passion for quality, reliability, and secure delivery. This is a Contract hybrid role (Oxford-based) offering flexibility, career growth, and the chance to contribute to life-changing AI technology. More ❯

Senior Front-End Software Engineer (React/TypeScript) Location: Remote (1 day per month in Oxford, UK) Type: Permanent | SaaS | Global Tech Company Are you passionate about building exceptional, scalable front-end applications? Our client — a leading SaaS company based near Oxford — is expanding and looking for a Senior Front-End Software Engineer to … and continuous improvement (Optionally) take on a technical lead role , mentoring others and influencing best practices ✅ What You’ll Bring 5+ years of experience building production-grade front-end software with React.js and TypeScript Strong skills in HTML5 , CSS3 , and RESTful APIs Experience with unit and integration testing Background in SaaS product development 💡 Nice-to-Have Skills Leadership or More ❯

About Us Software helps to enable the world-leading science performed at Diamond. Our software systems facilitate operations at all levels, including the low-level control of synchrotron and beamline hardware, the planning, execution and monitor of experiments, data archiving and retrieval, data processing and visualisation, the application for beamtime, and capture of remote experiment plans and samples. … Our software engineers work alongside our scientists to develop innovative and robust solutions to keep Diamond at the forefront of scientific research. About the Data Acquisition Group The Data Acquisition (DAQ) group develops software to interface with and control the hardware which allows experiments to be performed and monitored as well as guiding the end user to tools … for data reduction and analysis. The group works closely with scientists, controls, data analysis and information management engineers to continuously develop and improve software solutions for scientific data acquisition and on-the-fly monitoring and data analysis. The current DAQ software platform is a client-server application called GDA (Generic Data Acquisition) which is written in Java and More ❯

About Us Software helps to enable the world-leading science performed at Diamond. Our software systems facilitate operations at all levels, including the low-level control of synchrotron and beamline hardware, the planning, execution and monitor of experiments, data archiving and retrieval, data processing and visualisation, the application for beamtime, and capture of remote experiment plans and samples. … Our software engineers work alongside our scientists to develop innovative and robust solutions to keep Diamond at the forefront of scientific research. About the Data Acquisition Group The Data Acquisition (DAQ) group develops software to interface with and control the hardware which allows experiments to be performed and monitored as well as guiding the end user to tools … for data reduction and analysis. The group works closely with scientists, controls, data analysis and information management engineers to continuously develop and improve software solutions for scientific data acquisition and on-the-fly monitoring and data analysis. The current DAQ software platform is a client-server application called GDA (Generic Data Acquisition) which is written in Java and More ❯

data science, algorithmic precision, and intuitive design, we develop cutting-edge tools that enable users to analyze, interpret, and act on market dynamics with confidence. Your role As a Senior Software Engineer in the Product Engineering team you will build and evolve a data and content dissemination platform (Web, App, APIs, messaging) and corresponding data pipelines, ensuring … direct contact with business and technical stakeholders Work with product management to analyze and improve our business processes Conduct workload and complexity assessments Design, plan and implement new efficient software solutions in Python and Go Maintain and enhance our Airflow data pipelines Improve observability and scalability to support our constantly growing client base Continuously adapt to changing requirements in … Build and extend knowledge of financial instruments Minimum qualifications B.Sc. in Computer Science or similar field involving coding (e.g. physics or applied mathematics) Algorithms, data structures, complexity analysis and software design Hands-on senior level experience in Python programming Unix based systems, containerized environments and Kubernetes Working experience with databases: relational, NoSQL and time series Websocket, REST API More ❯

Job Description We are seeking a skilled and motivated Senior Software Engineer to join our Group Technology team in Milton Keynes. In this role, you will help develop, support and enhance business systems and applications using .NET technologies and SQL Server.We offer a hybrid working arrangement with one or two days per week in our Milton Keynes … office. Key Responsibilities: Be up to date regarding best practices in software development and deployment Implement best practice coding in relation to development coding standards Use operational data to improve the stability and performance of the applications Maintain documentation and release notes Have awareness of application security considerations Identify dependencies across the organization and work with teams to resolve … them before they become an issue, and install preventative measures to mitigate repeat occurrences Effectively handle risk, change, and uncertainty across the organization Work alone or alongside other Software Engineers on projects where necessary Create secure and high performing n-tier applications utilising best practices in the development of database applications using SQL Contribute to improve the overall processes More ❯

Equity options: 0.05% - 0.15% Hybrid working policy: Mandatory minimum three days a week in our Holborn office Experience level: At least six years in commercial software engineering On-call: Engineers are expected to be on-call at least one week per month If you're looking to join an exceptional, fast-paced, and growing team building innovative products in … role The Investa app was installed over 1,000 times within the first 24 hours of our priority access launch and we’re now looking for an extremely strong Senior Software Engineer to strengthen our engineering team as we scale. You will have extensive commercial experience designing, building and maintaining systems used in critical services or those … of continuous learning and improvement Ensure best practice through example and continual team feedback Root causing real-time production issues in a timely manner Taking a pragmatic approach to software development Your background Proven track record working with critical services or high-volume applications Strong proficiency in a number of programming languages, which can include Python, TypeScript, Java, JavaScript More ❯

Job Title: Senior Software Engineer (Distributed Systems & ML Infrastructure) Client: Elite Tech Firm Salary: Up to £220k Base + Industry-Leading Bonus Location: London (Hybrid) Sells: Work on next-gen distributed systems and ML infrastructure, take ownership of multiple greenfield builds, zero bureaucracy, a genuinely collaborative culture, stunning offices, and dedicated time for personal projects every Friday … An Elite FinTech firm is expanding its world-class engineering team and looking for exceptional Software Engineers who thrive on solving complex distributed problems at scale. You’ll be joining an elite group of engineers (alumni of NUS/McGill/MIT/Oxford) who have previously built systems at Meta, Twitter, Citadel, Ubisoft, and Jane Street ! This environment … total engineering autonomy, and a culture that genuinely celebrates innovation and curiosity. Role Design and build high-performance, distributed systems for large-scale ML infrastructure Drive best practices in software architecture, testing, and scalability Lead and collaborate on multiple greenfield initiatives focused on performance, reliability, and scale Skills Open to all experience levels Proven experience coding in Python Strong More ❯