1 to 25 of 74 Senior Software Engineer Jobs in the South East

Contract role : Senior Software Engineer : Up to £475 per day Outside IR35 : 6 months rolling : Hybrid Monthly (London) An innovative digital consultancy is looking for experienced Senior Software Engineers to design and architect scalable, high-performance systems for a cutting-edge platform being developed … major client. In this role, you'll tackle complex technical challenges as part of an agile team following Scrum methodologies. As a Senior Software Engineer, you'll set the standard for code quality and best practices, actively contributing to code reviews and collaborative programming sessions with your ...

Senior Software Engineer – C++ Salary- £50K-£75K negotiable depending on experience plus competitive benefits package including pension, 25 days holiday and life assurance. Location – Portsmouth, Hants, Hybrid Our client is a rapidly growing software and data science consultancy firm, renowned for their reputation and keen ability … understand and meet customer requirements effectively. Their team is dedicated to delivering high-quality, end-to-end software and data science services. This role offers the opportunity to work with these teams to operate across multiple sectors, including defence, energy, transport, and health, and contribute to the development ...

Senior Software Engineer – C#/Hardware Integration/High-Precision Systems Hybrid Working | £65,000–£70,000 + Bonus + Share Options Do you enjoy building software that directly drives complex hardware? Do you thrive at the intersection of C#, control systems and real-world engineering … hardware platforms used in cutting-edge scientific and industrial environments. As they continue to expand into new markets and applications, they are seeking a Senior Software Engineer to play a pivotal role in shaping and strengthening their core software systems. This is a rare opportunity ...

Senior Software Engineer will work within the Systems and Software team in the Programmes area of STS Defence, developing and maintaining software throughout the Software Development Lifecycle from requirements elicitation, through to in service delivery. The post will provide technical leadership on software projects for key stakeholders and on software development activities undertaken by the company. This includes responsibility for managing code and quality reviews to ensure relevant quality standards are met across the software team. The Senior Software Engineer will also assist in support of wider ...

Senior Embedded Software Engineer | £60-70k | 2 days in office | Royston A highly innovative engineering team is looking to a Senior Embedded Software Engineer to bridge the gap between hardware innovation and intelligent control systems. Youll be designing & developing extremely high spec instrumentation … test & production. This opportunity is unique as youll be writing code that directly shapes the direction of scientific discovery, and developing your embedded software skills in a high-spec environment that will take your skills to the next level. Senior Embedded Software Engineer Responsibilities + Design ...

Senior Java Full Stack Software Engineer - Public Sector Digital Transformation Location: UK (Fully Remote) Type: Permanent Security Clearance: SC cleared/eligible Use your engineering expertise to improve services that millions rely on. We're hiring a Senior Software Engineer to join a mission … high-quality engineering, enjoy mentoring others, and want your work to have real public impact, this role is for you. The Role As a Senior Software Engineer (Full Stack) you'll design, build and deploy scalable, secure and well-tested software solutions. You'll contribute ...

Role: Senior Software Engineer Location: Canary Wharf, Central London Salary: £70,000-£75,000 Plus Hybrid/Flexible Working, Company Bonus, Generous Pension and more. We are working with a well-funded, mission-driven organisation in the renewable energy space looking to hire a Senior Software Engineer into a core engineering team. You’ll be working on complex, large-scale platforms supporting critical infrastructure at a national level. This is a high-impact engineering environment where strong technical input genuinely matters. You’ll be responsible not just for building software, but for contributing ...

Senior Software Engineer Salary: Negotiable plus benefits, pension (7% contribution), 25 days holiday & life insurance We are looking for senior software engineers with a range of levels of experience including designing and delivering software applications. We are a small but rapidly growing consultancy, owned … looking for candidates with a mix of technical expertise and interpersonal skills, able to work independently or in small teams. The Role: As a Software Engineer, you will play a major role in developing code in the Software Modelling and Simulation, autonomy and geospatial fields, along with ...

Python Software Engineer/Senior Software Engineer - Quantum Location: Oxfordshire, UK ARCA Resourcing is partnering with an innovative, established but scaling technology company in Oxfordshire to recruit several Software Engineers and Senior Software Engineers. These roles offer the opportunity to work … forefront of computing, developing high-performance software that supports cutting-edge research, hardware systems, and applications. Successful candidates will join a multidisciplinary team, contributing to the development of advanced tools and platforms that enable next-generation technologies. Key Responsibilities Design, develop, and maintain robust software for computing applications ...

Senior Software Engineer – Fit-Tech SaaS | Up to £80,000 | UK Remote AWS Cloud | TypeScript | React | Serverless Architecture | HealthTech Recann is partnering with an innovative SaaS organisation in the health and wellness sector that is building a next-generation digital platform to support practitioners and clients across … businesses, the company is investing heavily in modern cloud infrastructure and engineering practices to support rapid growth. This is an exciting opportunity for a Senior Software Engineer to join a growing engineering team and play a key role in designing, building and scaling a modern cloud-native ...

Senior Software Engineer - Oxford (Hybrid) Salary: £60k + Annual Bonus We have partnered exclusively with a market-leading Manufacturing company who have an exciting opportunity for a Senior Software Engineer to join their growing team. This role will be focused on the design, development … maintenance of their software products within a .NET environment. Successful candidates for this position must have a minimum of 5+ years' experience developing with .NET, C#, XAML, Avalonia, as well as experience with web client-server application development, and UI development. Key Responsibilities: Work on cross-platform projects including ...

Senior Software Engineer C# .NET £75,000 + bonus + benefits Hybrid working Not every .NET role is the same. This is an opportunity to build and operate software that sits behind critical, real world infrastructure. High reliability. High scale. Proper engineering standards. We are looking … Senior Software Engineer with strong C# and .NET experience to join a growing engineering function delivering complex, production grade systems. This is a hands on senior individual contributor role. No line management. Real ownership. What you will be doing * Designing and delivering scalable, reliable software ...

Senior Software Engineer/Agentic AI and Machine Learning Conquer AI Location: UK based, remote friendly About Us! Conquer AI is a specialist AI consultancy and software engineering firm that helps enterprises reimagine critical processes using AI. We work with FTSE 100, FTSE 250, and Fortune … models. Everything we build has to be accurate, explainable, and able to stand up to scrutiny. The role! Conquer AI is looking for a Senior Software Engineers to join our senior engineering & delivery teams. This role is hands on and technical. You will be designing and building ...

Senior Software Engineer/Agentic AI and Machine Learning Conquer AI Location: UK based, remote friendly About Us! Conquer AI is a specialist AI consultancy and software engineering firm that helps enterprises reimagine critical processes using AI. We work with FTSE 100, FTSE 250, and Fortune … models. Everything we build has to be accurate, explainable, and able to stand up to scrutiny. The role! Conquer AI is looking for a Senior Software Engineers to join our senior engineering & delivery teams. This role is hands on and technical. You will be designing and building ...

Senior Robotics Software Engineer (Flight Software) Location: Remote (with a monthly visit to our Oxfordshire or London offices) Reporting to: Head of Engineering Contract: Permanent, Full Time About the Role We are an ambitious, fast-growing start-up seeking a talented Senior Robotics Software Engineer (Flight Software) to join our team. We are building cutting-edge assurance systems for AI and robotics applications, setting global industry standards to enable complex autonomous systems to operate safely, predictably, and efficiently. In this role, you will play a crucial part in developing the software ...

Senior Robotics Software Engineer (Flight Software) Location: Remote (with a monthly visit to our Oxfordshire or London offices) Reporting to: Head of Engineering Contract: Permanent, Full Time About the Role We are an ambitious, fast-growing start-up seeking a talented Senior Robotics Software Engineer (Flight Software) to join our team. We are building cutting-edge assurance systems for AI and robotics applications, setting global industry standards to enable complex autonomous systems to operate safely, predictably, and efficiently. In this role, you will play a crucial part in developing the software ...

Senior Robotics Software Engineer (Flight Software) Location: Remote (with a monthly visit to our Oxfordshire or London offices) Reporting to: Head of Engineering Contract: Permanent, Full Time About the Role We are an ambitious, fast-growing start-up seeking a talented Senior Robotics Software Engineer (Flight Software) to join our team. We are building cutting-edge assurance systems for AI and robotics applications, setting global industry standards to enable complex autonomous systems to operate safely, predictably, and efficiently. In this role, you will play a crucial part in developing the software ...

Senior AI Software Engineer Employment Type: Contract Duration: 12 Months Location: Berkshire, England (1 day per month onsite) Umbrella Rate: £600-£700/day Opportunity Overview We are working with a large, technology-driven organisation seeking a Senior Software Product Engineer to join … ecosystem, you will play a key role in accelerating stakeholder objectives through robust, sustainable technology solutions. Key Responsibilities Design, develop and maintain software solutions leveraging AWS services including Amazon Connect, Amazon Lex, AWS Lambda and Large Language Models (LLMs). Collaborate with cross-functional teams to integrate new capabilities ...

Senior Software Engineer – Secure Systems & Advanced Cyber (Farnborough) Work on real-world engineering challenges that directly contribute to the UK’s defence and national security. We’re looking for a Senior Software Engineer to join a small, highly capable team developing next‐generation secure … where you’ll thrive. What you'll be doing: You’ll join a multidisciplinary engineering group that designs, prototypes, and delivers high‐assurance hardware–software solutions used in some of the most demanding security environments in the UK. You’ll work on projects from early-stage research through ...

Senior Software Engineer Location: Surrey (hybrid working available) Security Clearance: Eligible for SC/DV clearance required Our client, a highly respected UK engineering organisation operating within the Defence sector, is seeking an experienced Software Engineer to join their growing team. This is an opportunity … work on complex, high-integrity systems, delivering innovative software solutions that meet demanding customer and regulatory requirements. As a senior member of the software function, you will lead and contribute to the development of high-quality software products and systems for mission-critical applications. You will ...

Senior Software Engineer Salary: £75k-£110k (plus attractive bonus on top) Location: London or Leeds (relaxed about hybrid or remote working, if preferred) My client is a specialist provider of sports pricing and trading technology, developing advanced simulation-based models and risk tools that underpin the performance … major sports brands. Role Overview Were looking for a Senior Software Engineer to join the Modelling & Data Engineering group at a rapidly expanding sports-technology business. This is a hands-on role in a fast-moving environment where youll help shape new modelling tools, improve existing systems ...

Senior Software Engineer (JavaScript) Salary: Up to £85,000 Hybrid - 2 days a week in office (London/Brighton/Cardiff) Why join us? We work at the intersection of creativity, data, and cutting-edge technology to turn ideas into measurable impact. Our strength comes from diverse … puts people first. Backed by a global media and content network, we build tools that reach real audiences at scale. The role As a Senior Software Engineer, you'll design and build high-impact tools, automation, and platforms used across global media, SEO, paid media, and content ...

Senior Software Engineer x 2 Portsmouth £68.55 Inside IR35 12 month contract About the Role We are seeking 2 highly skilled and motivated Senior Software Engineers to join a growing engineering team. This is an opportunity to work on mission-critical systems that support national … security, advanced defence platforms, and next-generation technologies. As a senior member of the team, you will play a key role in designing, developing, and delivering high-integrity software solutions within a secure and collaborative environment. What you'll be doing: Designing, reviewing, developing, testing, documenting, configuring ...

Senior Software Engineer – Backend (TypeScript/Node.js) Remote (UK) Circa £150,000 This opportunity is with a growing B2B technology company building backend-heavy products used by enterprise customers in a regulated space. The platform focuses on reliability, data correctness, and operational robustness. The business is continuing … investing in strengthening the foundations of its backend systems as both the product and customer base grow. The Role: They're looking for a Senior Backend Software Engineer to join one of their product engineering teams, with a focus on building and running services in TypeScript/ ...

Senior Software Engineer – Backend (TypeScript/Node.js) Remote (UK) Circa £150,000 This opportunity is with a growing B2B technology company building backend-heavy products used by enterprise customers in a regulated space. The platform focuses on reliability, data correctness, and operational robustness. The business is continuing … investing in strengthening the foundations of its backend systems as both the product and customer base grow. The Role: They're looking for a Senior Backend Software Engineer to join one of their product engineering teams, with a focus on building and running services in TypeScript/ ...