1 to 25 of 86 Permanent Senior Software Engineer Jobs in the Thames Valley

Working for an industry leading, high-growth SaaS business with some of the biggest brand names in the world as customers, the Senior Software Engineer will build innovative next-gen solutions that are at the forefront of the industry. In this role, the Senior Software Engineer will be given full autonomy, taking ownership from design phase through to deployment, building scalable backend systems, as well as some frontend too if you like. This area is the future of the company (and the industry!) and as such has strong investment and visibility. The Senior ...

Senior Software Engineer | Distributed Systems | Sustainable Cloud Native Platform Up to £110,000 per annum plus bonus plus stock Central London office Golang, Rust, C, Kubernetes, Linux, Cloud Native, Distributed systems... Are you a Senior Software Engineer with extensive knowledge of building distributed systems … so... I'm partnered with a very exciting Cloud scale-up who have received record Series A funding and are looking for innovative Senior Software Engineers to join their ambitious team! With a new VP of Engineering who has spent much of their career building out a world ...

Senior Software Engineer - Hybrid - Salary £70K (DOE) We're currently working with a growing SaaS company based in Oxford that have an exciting job opening for a Senior Software Engineer skilled with C# .NET, Angular, and SQL. You will be guiding architectural decisions, ensuring … rolled out nationally. Part of this position will involve driving the adoption and effective use of emerging AI-assisted development tools and AI Software in the development life cycle (e.g., Cursor, v0) to enhance team productivity and innovation. Essential Experience: Proven experienced leading/mentoring software engineering teams ...

Senior Software Engineer | Start-up | Cybersecurity | London About the Company Hyre AI is partnering with a fast-growing, well-funded cybersecurity company on a mission to solve one of the biggest challenges on the modern internet: proving who's human in a world dominated by bots, scripts … names in financial services and beyond, and they've just raised a multi-million seed round to accelerate growth. Now they're hiring a Senior Software Engineer to join a small, exceptional team building the future of online trust. About the Role As a Senior Software ...

Senior Software Engineer Location: Onsite, London, United Kingdom Type: Full-time Compensation: Negotiable (Competitive salary + equity) About Ontik Ontik is an ambitious, early-stage B2B financial operations platform designed to streamline and simplify complex financial workflows for heavy duty industries. We're scaling rapidly and looking … high-performance, ownership-driven environment, where you can make a direct impact on the product and help shape its future. Role overview As a Software Engineer (Full-Stack) at Ontik, you'll play a pivotal role in building and scaling our financial operations platform. This is a hands ...

Senior Software Engineer (C++) – Real-Time Market Data Systems Company Insight: A leading global quant trading firm is looking for a senior software engineer experienced in market data processing to help evolve the firm's real-time market data platform - a critical system that … Responsibilities: Build and enhance real-time market data and distribution pipelines spanning global markets and multiple asset classes. Design and optimise high-performance, distributed software systems for processing market data at scale. Champion engineering best practices and innovation. Serve as a technical leader in market data systems. Apply data ...

Senior Software Engineer Climate Tech Nearly Remote (travel into London) Salary up to £100,000 We are the chosen talent provider of an innovative early-stage company in the climate & insurance space. Are you a builder who wants to use your software engineering skills to make … sustainability efforts across the globe. They're a small but highly experienced team of tech and insurance pioneers, and they're looking for a Senior Software Engineer to help shape the future of their platform. What You'll Do: Play a major part in designing and building ...

Senior Software Engineer - Hybrid - Salary £70K (DOE) We're currently working with a growing SaaS company based in Oxford that have an exciting job opening for a Senior Software Engineer skilled with C# .NET, Angular, and SQL. You will be guiding architectural decisions, ensuring ...

Senior Software Engineer 12 month contract Outside IR35 At Cotality, we are driven by a single mission—to make the property industry faster, smarter, and more people-centric. Cotality is the trusted source for property intelligence, with unmatched precision, depth, breadth, and insights across the entire ecosystem. … working together to set the pace for unlocking new possibilities that better serve the property industry. Cotality has a fantastic opportunity for a Senior Software Engineer wanting to work on solutions to the climate crisis. The contractor will support developing tools and functionality that will help ...

Senior Software Engineer 12 month contract Outside IR35 At Cotality, we are driven by a single mission—to make the property industry faster, smarter, and more people-centric. Cotality is the trusted source for property intelligence, with unmatched precision, depth, breadth, and insights across the entire ecosystem. … working together to set the pace for unlocking new possibilities that better serve the property industry. Cotality has a fantastic opportunity for a Senior Software Engineer wanting to work on solutions to the climate crisis. The contractor will support developing tools and functionality that will help ...

Senior Software Engineer 12 month contract Outside IR35 At Cotality, we are driven by a single mission—to make the property industry faster, smarter, and more people-centric. Cotality is the trusted source for property intelligence, with unmatched precision, depth, breadth, and insights across the entire ecosystem. … working together to set the pace for unlocking new possibilities that better serve the property industry. Cotality has a fantastic opportunity for a Senior Software Engineer wanting to work on solutions to the climate crisis. The contractor will support developing tools and functionality that will help ...

Senior Software Engineer 12 month contract Outside IR35 At Cotality, we are driven by a single mission—to make the property industry faster, smarter, and more people-centric. Cotality is the trusted source for property intelligence, with unmatched precision, depth, breadth, and insights across the entire ecosystem. … working together to set the pace for unlocking new possibilities that better serve the property industry. Cotality has a fantastic opportunity for a Senior Software Engineer wanting to work on solutions to the climate crisis. The contractor will support developing tools and functionality that will help ...

Senior Software Engineer 12 month contract Outside IR35 At Cotality, we are driven by a single mission—to make the property industry faster, smarter, and more people-centric. Cotality is the trusted source for property intelligence, with unmatched precision, depth, breadth, and insights across the entire ecosystem. … working together to set the pace for unlocking new possibilities that better serve the property industry. Cotality has a fantastic opportunity for a Senior Software Engineer wanting to work on solutions to the climate crisis. The contractor will support developing tools and functionality that will help ...

Senior Java Engineer | hybrid (2 days in office) | Up to £85k Want to work for a global technology company that helps businesses easily connect, manage, and scale their devices using secure and reliable mobile connectivity worldwide. We’re looking for a Senior Software Engineer … Doing Designing and building scalable, event-driven systems Working heavily with Java , applying strong OOP principles and design patterns Contributing to software and system architecture decisions Challenging ideas constructively and raising engineering standards Supporting the team What We’re Looking For 5–7+ years’ experience as a Software ...

Senior Software Engineer (.NET) Financial Services Consultancy | Payments & Gateways ?? Oxford area (Hybrid - 3 days in office) ?? £70,000 base + discretionary bonus I'm currently working with a well-established financial services technology consultancy based in the Oxford area . The business specialises in delivering complex, high … banks, FinTech's, and payment providers, with projects heavily focused on payment integrations and gateway platforms . They're looking to hire a Senior Software Engineer to join their engineering team, someone who can combine hands-on development with mentoring and technical leadership. The Opportunity This ...

build real world value. Are you ready to elevate your career? At Ripple Labs Inc., we offer an outstanding opportunity for a Senior Software Engineer to join our top-tier team in London. As a part of our dynamic and ambitious group, you will play … role in crafting and developing groundbreaking software solutions that drive innovation and success! Responsibilities As a Senior Software Engineer, you will: Design, develop, and implement software systems that meet meticulous quality standards. Work with diverse teams to define technical needs and deliver impeccable solutions. Lead ...

Senior Software Engineer (Full-stack) - Permanent | On-Site | London Join a rapidly scaling US-backed startup at a pivotal moment. With significant funding secured and strong momentum, they are establishing their UK presence and offering exceptional equity opportunities for early team members. As a Senior Software Engineer, you'll work across our Python and TypeScript stack, contributing wherever the team needs you most. What You'll Be Doing: Develop and maintain FastAPI (Python) and Next.js (TypeScript) applications. Own features end-to-end - from user interface through to infrastructure and internal tooling. Navigate and contribute ...

Role: Senior Software Engineer (Data & Platform) @ VC Firm Location: London – Hybrid (3 days) Compensation: Up to £200,000 + equity We're working with a high-performing venture capital firm building a proprietary technology platform that sits at the heart of how they identify, evaluate, and partner … with exceptional companies. The engineering function operates like an internal startup: small, fast-moving, and deeply embedded in the investment process. As a Senior Software Engineer, you'll take full ownership of the firm's core data platform — the primary day-to-day tool used by partners ...

Senior Design Engineer Development of real-time machine control software in C#/.NET, integrating lasers, motion control, robotics, and industrial systems. Location: Oxfordshire (On-site) Contract: Full-time Salary: Competitive Were looking for a Software Software Engineer to help build and maintain high … performance software for advanced industrial systems. Key Responsibilities Build and maintain C#/.NET software (operator tools + backend services) Develop control software integrating hardware subsystems (automation, sensors, motion) Focus on performance and reliability (multithreading, low latency) Integrate with industrial systems via EtherCAT/OPC UA/ ...

fast-growing AI-driven SaaS company is hiring three Senior Software Engineers to join its engineering team. These are hands-on roles with a strong backend and architectural focus, ideal for engineers who enjoy working in scale up or startup environments and want to build high-quality, cloud … native software that powers real-world automation. You'll be part of cross-functional squads delivering modern, serverless, AI-enabled applications used in highly regulated industries. The company has a strong engineering culture, embraces AI-assisted development, and offers autonomy, impact, and the chance to help shape technical direction. ...

Senior Software Engineer Full Stack - Ruby on Rails, React Up to £120k DOE Fully Remote - must be UK based A fast-growing sports tech company building high-performance, data-driven products for a rapidly expanding global audience is searching for a Senior Full Stack Engineer. This … pivotal role for an experienced engineer who thrives on shaping architecture, driving technical direction, and still remaining hands-on in the codebase. As a technical leader within a cross-functional Product Team, you'll influence the long-term engineering strategy, guide architectural decisions, and ensure the platform scales reliably ...

Senior Software Engineer – 3D Graphics/Computer Vision London preferred | Full-time | Visa sponsorship available The mission Work at a stealthy 3D/graphics startup that turns real‐world objects into production‐ready, photoreal assets for film, games and real‐time experiences. Think: high‐end material capture … photogrammetry tools used behind the scenes by top studios, not off‐the‐shelf consumer software. The role You'll be the go‐to engineer for 3D rendering and asset processing in a Windows desktop app that sits at the heart of the company's pipeline. Expect deep work ...

Title : Senior Embedded Software Engineer Location : Oxford Salary : £60,000 - £70,000 (Depending on Experience) Job Overview: We are seeking an experienced Senior Embedded Software Engineer to join a multidisciplinary design and engineering team developing high-quality, safety-critical embedded systems. The successful candidate … will take technical ownership of embedded software development across multiple concurrent projects, working closely with hardware, systems, and test engineers to deliver robust and compliant solutions. This is a full-time, on-site role based in Oxford, offering the opportunity to influence software design and development across several ...

Title : Senior Embedded Software Engineer Location : Oxford Salary : £60,000 - £70,000 (Depending on Experience) Job Overview: We are seeking an experienced Senior Embedded Software Engineer to join a multidisciplinary design and engineering team developing high-quality, safety-critical embedded systems click apply ...

Title: Senior Embedded Software Engineer Rank: Determined by the confirmed level and scope of experience Company: Chevalier Tech Limited Location: Colindale, Greater London (On-site) Salary: Salary is competitive and negotiable based on experience. Job Type: Full-time, Permanent About Us Chevalier Tech Limited is a tier … Smart Door Handles, and Control Electronics, which are integrated into high-end passenger and super cars worldwide. About the Role As a highly Experienced Software Engineer, you will lead the software engineering team, play a pivotal role in the design, development, and implementation of embedded software ...