76 to 100 of 100 Senior Software Engineer Jobs in Berkshire

Senior Python Developer – London – AI Start-up Location: London (Hybrid) Compensation: Up to £150K Atarus have partnered with a rapidly growing YC-backed AI start-up looking to hire a Senior Python Developer . This is an opportunity to join at the ground floor of a company that’s already secured a strong seed round, launched with enterprise … clients, and has ambitious growth plans over the next year. You’ll be joining a small, senior founding team who are redefining how AI-powered software is built — already gaining traction with customers ranging from Series A startups to global tech giants. 🔍 What You’ll Be Doing Designing, building, and deploying high-performance Python applications Working directly with … match it. ✅ What They’re Looking For 5+ years’ experience in Python development (or impressive personal projects) Strong experience with backend systems, APIs, and cloud infrastructure Solid understanding of software design and architecture principles A genuine builder mindset — someone who loves experimenting and delivering fast Based in London (or able to work onsite when needed) If you’re excited More ❯

Role : Senior .Net Developer Comp: £65,000-£75,000 Location : Central London (On-site). About the Role: As a Senior .NET Developer, you’ll play a key role in designing, developing, and maintaining software applications. You’ll collaborate closely with cross-functional teams to translate user needs into technical solutions that are robust and user-friendly. More ❯

Location: London (3 days a week onsite) | 💰 Up to £80,000 per annum We’re looking for a Senior Backend Engineer to join a high-impact product team shaping the future of travel loyalty experiences. You’ll help design and build scalable backend systems that power a seamless journey for millions of travellers around the world. What You … technical mentorship and contribute to engineering best practices. Advocate for new tools, technologies, and frameworks to drive innovation. What We’re Looking For 5+ years of experience in backend software development with strong CS fundamentals. Proven experience designing and developing APIs and distributed systems. Strong sense of ownership with a focus on performance, reliability, and maintainability. Excellent communication and More ❯

Senior Java Developers – 3 positions available We’re looking for three experienced Java developers to play a key role in delivering long-term projects and supporting the growth of the wider engineering team. A rapidly growing healthtech scale-up is transforming how hospitals deliver care across the UK — and they're now expanding their development team at pace. In More ❯

Senior Java Developers – 3 positions available We’re looking for three experienced Java developers to play a key role in delivering long-term projects and supporting the growth of the wider engineering team. A rapidly growing healthtech scale-up is transforming how hospitals deliver care across the UK — and they're now expanding their development team at pace. In More ❯

Senior/Technical Lead - Flutter (Mainly hands-on with oversight of a team of 4) London (Hybrid) - 2/3x a week onsite intially for first couple of months then potential to be more remote £90,000-£10,000 We’re partnering with a fast-growing company that’s transforming how people interact with tech. Join a workplace-tech … of the world’s most advanced smart-building platforms, powered by digital twins, real-time analytics, and seamless third-party integrations They’re now looking for a Lead Mobile Engineer with deep Flutter expertise to take ownership of their client-facing apps. This is a hands-on technical leadership role, you’ll set the technical direction, mentor a small … team, and work directly with senior leadership to deliver the roadmap. What you’ll be doing: Own the mobile roadmap & architecture (Flutter, Swift, Java) Lead from a technical perspective: design, code, review, and mentor Integrate with complex third-party SDKs (BLE, mobile access, indoor wayfinding) Drive engineering excellence in testing, performance, monitoring, and CI/CD Collaborate closely with More ❯

Overview Join a team at the forefront of developing advanced embedded and application software solutions that enable secure and high-performance systems. You'll work across multiple concurrent research, development, and production programmes, ranging from tens of £k to several £m. Delivering high-quality software in demanding, mission-critical environments! You will define, architect, design, develop, document, and … test embedded and/or application software as part of a collaborative engineering team of 5-20 engineers. The role spans the full software development lifecycle, from requirements analysis through to verification, delivery, and maintenance. Responsibilities Define, architect, design, develop, document, and test embedded and/or application software. Apply object-oriented design , modern coding standards, and best … practices (TDD, CI/CD, DevSecOps). Translate system-level designs into robust software architectures and requirements. Use modelling tools (e.g. Enterprise Architect, RSA ) to create and maintain accurate design artefacts. Estimate and manage effort to meet cost, quality, and schedule targets. Contribute to process improvement and technical innovation within the team. Communicate complex technical ideas clearly to a More ❯

Founding Product Engineer | Early-stage AI startup (hire #5) 💰 Up to £130,000 + meaningful early-stage equity % 🏢 Building together 4 days a week onsite in London bloom are working with a Seed stage AI startup on a mission to reinvent one of the world’s most painfully manual workflows, the kind of industry where automation is still in More ❯

everyone to have personal dignity at work and be empowered, so you can be your best, true authentic self each and every day. About the Role Write clean, maintainable software to critical deadlines whilst following best engineering practices. Understanding and solving challenging problems through simplistic solutions and services. Architect and build using technology that is best suited to solving … in central London one day per week to catch up with other team members. The role may also require occasional travel to other offices when necessary. About You Talented engineer with a passion for software quality, an eye for continuous improvements, and a solution-based approach that focuses on the bigger picture whilst remaining pragmatic and operating within … known constraints. Ideally 5+ years' hands-on commercial experience architecting, designing and implementing resilient and reliable software and integration solutions, but if you are technically talented, passionate and can communicate then we're interested to hear from you regardless of experience years. Demonstrable software development experience in .NET Core, C# plus one of Blazor, JavaScript, Angular, Azure, RabbitMQ More ❯

Role : Senior, Staff & Principal Engineers Salary range: 90 - 150k (+ equity) Location : Central London (x3 days per week onsite - Tue/Wed/Thurs) Tech stack includes : Typescript, React, Material UI, NodeJS, Postgres, AWS (Serverless) Current team size : 25 Engineers We're working with a B2B SaaS startup company based in London, an AI procurement platform - reduces time & money More ❯

Trading System Engineer – Shape the Future of Trading Leading European Private Bank Ready to make a real impact on a cutting-edge trading platform? A leading European private bank is seeking a highly skilled Trading System Engineer/Architect to spearhead the transformation of their equity trading technology. This is a unique opportunity to contribute to a multi … Execution Platform. Guarantee the system's high availability for global equity market trading. Craft bespoke trading workflows tailored to the specific needs of demanding clients across multiple trading desks. Engineer and optimize systems for dynamic scalability, ensuring responsiveness to market fluctuations and events. Collaborate closely with other IB Engineering teams and project stakeholders. What You Bring: A minimum of … five years of experience in software engineering, with a focus on modern software design, architectural patterns, and performance optimization (throughput, latency, capacity). Expert-level proficiency in Java, particularly in the development of high-performance, low-latency, and microservice-based real-time trading applications. Deep understanding of trading systems, including integration with reference and market data systems, ideally More ❯

Senior Java Developer – Middle Office Platform (Credit & Rates Trading) Location: London Salary: £120K-£140K + up to 25% Bonus + benefits About the Company This global financial technology firm is renowned for combining cutting-edge engineering with a market-leading trading platform that powers electronic trading across Credit and Rates. Their flagship product is used daily by thousands of … a fast-paced, product-focused culture where engineers have direct impact on scaling systems that sit at the heart of global capital markets. The Role We are seeking a Senior Backend Java Engineer to play a key role in scaling the Middle Office platform of a world-leading electronic trading system. You’ll work on mission-critical backend … high-volume, real-time environment. This is a hands-on leadership role where you’ll mentor other engineers, promote engineering excellence, and act as a point of contact for senior stakeholders. Projects You’ll Work On Scaling a real-time trading platform: Handle vast growth in electronic trading volumes, ensuring throughput and ultra-low latency. Resilience & recoverability: Build fault More ❯

We are seeking a talented and dynamic Microsoft Copilot Studio Engineer to join our innovative team. This role plays a key part in driving the development and enhancement of Microsoft’s Copilot technology, an essential tool for productivity and creativity. In this role, you’ll use your technical expertise and creative thinking to help advance our ground breaking projects. … features for Microsoft Copilot, ensuring seamless functionality and a smooth user experience. Collaboration: Work closely with cross-functional teams—including product managers, designers, and engineers—to deliver high-quality software solutions. Testing and Debugging: Conduct rigorous testing and debugging to ensure reliability and performance of Copilot features. Innovation: Continuously explore and implement innovative solutions to enhance Copilot’s capabilities. … all developed features and integrations. Support: Provide technical support and guidance to end-users and stakeholders. Required Qualifications Educational Background: Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related field. Technical Skills: Proficiency in programming languages such as C# , Python , or JavaScript . Experience with Microsoft Azure , AI , and machine learning technologies is highly More ❯

Duration: 6 months Job Type: Hybrid - office based 2 days per week Job Description: Design, implement, and optimise live streaming capabilities into existing software-based video pipeline Leverage hardware acceleration to develop high-performance, low-latency video capture, processing, AI inference, visualization and streaming software Work as part of a multidisciplinary team to develop robust and secure-by … design software for a medical device Maintain a high level of quality and reliability in submitted code and participate in team code reviews Must Haves Expertise on WebRTC live video streaming development Expertise on software video pipelines (e.g., GStreamer and/or FFmpeg) Excellent C++ development skills with C++11 or higher, multi-threading, inter-process communication and performance More ❯

Our client, a major Quantitative Hedge fund, is looking to hire a skilled Java Software Engineer to help build out the firm's trading systems and tooling. This role allows you to join one of the world's most successful hedge funds, collaborate with an exceptionally talented team operating in a hybrid approach, and earn market-leading compensation More ❯

Ready to build the high-performance logic powering next-generation logistics? Join Reelables and architect the core back-end services that process and serve data for millions of smart labels worldwide! This isn't just back-end development – you're More ❯

proof of concepts. Make your case, and we’ll consider expanding our tech stack. ‍ You're a great fit if You have at least 4+ years of experience in software engineering , and back yourself as an individual contributor . You're opinionated on software engineering best practices , balanced by a bias for shipping . You bring advanced expertise More ❯

Plexus has partnered with a next-generation blockchain infrastructure provider that helps protect users from front-running attacks, recover excess gas costs, and unlock additional value within transaction flows. Their platform supports multiple chains, is built for resilience and scale More ❯

most sought-after hedge funds, founded by a top-performing Portfolio Manager from a leading multi-manager platform, is expanding its Front Office Technology team. They are seeking an engineer to develop advanced technical risk solutions and applications supporting both the Portfolio Managers and the Risk Management function. You would take ownership of the end-to-end development of … Python, including the most recent releases/tooling and supporting libraries Demonstrated experience architecting and building risk tooling and risk management systems. Strong Communication skills, combined with strong fundamental software engineering principals. Why would this interest you? Very high impact role in a scaling Macro Fund with an excellent track record. Hybrid working structure: 3 days in, 2 remote More ❯

Required Qualifications Senior level software engineering competency, with strong full-stack experience. Proficient in .NET/C#, JavaScript, Azure SQL (MSSQL). Proven experience developing APIs and UI components in distributed systems. Experience working with pipelines that power mission-critical financial transactions. We're building modern, cloud-native systems using .NET/C#, Azure SQL, and Vue.js, with More ❯

to-end delivery of new AI initiatives from idea and architecture through to deployment, monitoring, and optimisation. Introduce new tools, frameworks, and best practices that strengthen the team’s software engineering foundations. Contribute to a culture of continuous learning by mentoring engineers and helping shape the team’s technical direction. Ensure the stability and reliability of key AI platforms … through proactive monitoring, maintenance, and occasional on-call support. What You’ll Need Extensive hands-on experience building and scaling AI-powered backend systems (8+ years in software development, 3+ focused on AI or ML engineering). Expert proficiency in Python, with strong working knowledge of ML libraries and frameworks. Solid background in data architecture, with proven experience across More ❯

technical standards across the Test Engineering Program. Required Qualifications Bachelor’s or master’s degree in computer science, Engineering, or a related technical field. 8+ years of hands-on software development experience, including large-scale backend systems or platform engineering. Expert in Python with a strong understanding of object-oriented programming, testing frameworks, and automation libraries. Experience building or … experience with AWS services (Lambda, S3, ECS/EKS, Step Functions, CloudWatch). Proficient in Infrastructure as Code using Terraform to manage and provision cloud infrastructure. Strong understanding of software engineering best practices: code quality, reliability, performance optimization, and observability. Preferred Qualifications Exposure to machine learning workflows, model lifecycle management, or data engineering platforms. Experience with distributed systems, event More ❯

Vicinity Technologies Limited, a dynamic leader in the UK's 5G and AI revolution, is seeking talented Senior/Principal Wireless Software Engineers to join our team of innovators. As a key contributor, you will play an integral role in developing cutting-edge 5G, 6G and Non-terrestrial Network (NTN) solutions which are transforming the way we connect … and communicate. Job Responsibilities Participate in design and develop 5G/6G TN/NTN and AI signal processing algorithms for communications systems, physical layer software and protocol stack software. Participate in 5G radio equipment and user terminals physical layer solution verification, end-to-end testing, network deployment and field trials. Interface with hardware, software and system engineers … growing company. Benefit from a competitive salary, performance-based bonuses, and a comprehensive benefits package. About Vicinity Founded in 2023, Vicinity develops and deploys advanced base stations, NTN solutions, software-defined terminal solutions and private networks, with global trials already underway. We collaborate with silicon providers, operators, integrators and top research institutes, pushing past 5G into what is next. More ❯

metadata systems to support a growing analytics platform. Offer technical insight and second/third-line support on complex data issues. What You’ll Need 6+ years of professional software engineering experience. Strong programming background in Python or Go, plus another object-oriented language. Proficiency in SQL (both transactional and analytical use cases). Experience working with data lakes More ❯

Lead to turn our robotics stack into a working product. This isn’t a coordination-only role. You’ll write code, integrate subsystems, debug real robots, and build the software layer that brings everything together for the end user. You’ll lead a small team focused on application-level logic. This is where everything meets: controls, navigation, perception, learning … company, make practical decisions, build prototypes, and iterate fast. We want someone who’s not afraid to plug in, test in hardware, and own the product experience from the software side. What You’ll Do Develop and maintain the top-level robot application code Integrate modules from other teams: controls, navigation, CV, RL, platform Build and evolve the application More ❯