20 of 20 Senior Software Engineer Jobs in Crawley

Senior Software Engineer Key Technologies: C#, .NET, React, JavaScript, Typescript, AWS, Docker 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 … 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 having a direct impact from the get-go. ...

Senior Software Engineer (Python - FastAPI) This fast-growing consultancy is pushing the boundaries of AI and data science, helping clients turn complex challenges into scalable, production-ready solutions. They're now hiring a Senior Software Engineer who can blend deep technical expertise with … above What You'll Be Doing: Leading the end-to-end design and build of applications that utilise advanced AI and data-led software solutions. Developing scalable data pipelines and backend services that support complex modelling work. Setting standards for clean, efficient engineering across Python(FastAPI), SQL and cloud ...

Senior Software Engineer London – 1 day a week onsite Are you a highly experienced individual contributor looking for a step up into a senior position in a high-performing team within the world of Banking/Payments? Are you passionate about high-throughput, real-time systems … like!) Opportunity to collaborate with major global banks Fast-paced, product-led environment where your voice matters If you're a motivated Senior Software Engineer ready to tackle complex challenges and deliver meaningful change, hit apply – and shape the future of payments with us. ...

that suits your lifestyle and helps you reach your ambitions. Applications for an exciting role are now open in our Underwater Systems Business Line: Senior Software Engineer/Architect - Linux & C++ & Python The job: Due to business growth and increased demand, an additional Senior Software Engineer/Architect is required to support the business in delivering the current and next generation of Mine Counter Measures capabilities. The successful applicant will be involved in a wide range of activities from defining/updating the technical solution, contributing to system requirements, meeting with customers ...

Senior Python software engineer - with strong Maths background Are you a software engineer who thrives on building robust, scalable products with a strong foundation in mathematics and analytics? We're specifically looking for an engineer—not a data scientist—to join ScanmarQED … Senior Python Software Engineer and play a key role in developing the core technology behind our Pulse platform—a product used by leading companies worldwide to solve complex optimization and modeling challenges. You'll collaborate with an international team, take ownership of product modules, and help drive ...

Senior Software Engineer (C++) Basildon (1-2 days p/w) £65 - £70ph Initial 3 months (likely to extend) Are you a Software Engineer with C++ experience looking for your next challenge? We are on the hunt for talented software engineers to support … range of defence projects. Direct industry experience is not required; we are happy to explore all backgrounds and help develop all our software engineers. This role requires working on the Basildon site 1-2 days a week when needed by the project but working from home possible at other ...

Senior Software Engineer (Python) Up to £130,000 + excellent benefits (including work from abroad) Hybrid - 2 days onsite in Central London (London Bridge) Are you a Senior Python Engineer who loves solving deep technical challenges? Want to help reinvent how future hardware is created … building a revolutionary platform that turns high-level hardware requirements into complete circuit designs. You'll work on complex problems at the crossroads of software, data and engineering, collaborating with experts across multiple disciplines. What You'll Do Own and evolve backend systems across data models, algorithms, infrastructure ...

Senior Software Engineer - .Net, Azure. - Contract £700 - 750pd UK, Remote | Contract Inside IR35 Only | 6 months January start. Curated is partnering with a global SaaS scale-up undergoing a significant platform modernisation and growth phase. The business is scaling multiple engineering teams and is looking to bring … highly experienced contract Software Engineers to support complex, high-impact delivery. This role is suited to senior engineers who enjoy working on large, evolving platforms, modern cloud infrastructure, and solving non-trivial technical problems in fast-moving environments. The Role You will join a cross-functional product engineering ...

Senior/Principal Software Engineer .NET £85,000-£110,000 Remote (UK) Do you thrive on building scalable solutions that power commerce worldwide? We're partnering with a rapidly expanding global payment platform fresh off a transformative acquisition. They're engineering a robust, merchant-centric ecosystem built … quality, resilience, and scale - and they need exceptional .NET Software Engineers to drive this evolution. Your Impact: Design and develop mission-critical platform services, APIs, and merchant portals Drive performance optimisation and system reliability through intelligent engineering Champion engineering excellence in architecture, code quality, and delivery Partner with cross ...

Embedded Software Engineer (Contract/Flexible) – Outside IR35 We are a small but established engineering firm looking to engage an experienced Embedded Software Engineer on a flexible, non-committed, Outside IR35 basis. Our existing embedded software contact is no longer available … seeking a trusted, go-to embedded engineer to support our products and future developments on an ongoing basis. This role is ideal for an experienced contractor or freelancer who values autonomy, flexibility, and long-term collaboration without fixed hours or guaranteed workload. The Role Act as the primary embedded ...

Lead Software Engineer – Java Microservices | London (1 day per week on-site) | £74,000 – £92,000 + Package We're partnering with a leading UK bank to recruit a Lead Software Engineer with strong Java and microservices expertise. This is a hands-on role building high … performance, scalable software for real-world, high-traffic systems. About the Role You'll join a permanent feature team, taking end-to-end ownership of services, from design and development to testing, deployment, and optimisation. Your focus will be on building robust microservices that support high-traffic user experiences ...

Senior Java Engineer – Actuarial Data Squad – Outside IR35 - Contract We're looking for a Senior Java Engineer to join a high-profile project focused on backend systems that automate complex financial and actuarial processes. This is a hands-on role delivering backend solutions under tight deadlines ...

Principal Software Engineer Basildon 3-Month Contract Paying up to £70p/h (Inside IR35) Please note - due to the nature of the work, you will need to hold or be eligible to obtain a high level of UK Security clearance – please only apply if suitable Key Responsibilities … C++ software development Development of new applications to meet user expectations and within formal constraints Developing Windows & Linux applications Required Skillset: Understanding and knowledge of one or more of the following: C++ software development Experience using Rhapsody Development of new applications to meet user expectations and within formal ...

technology. If you love untangling hard problems, improving legacy systems, and shipping clean, tested code, you'll fit right in. Your role as a Senior PHP Software Engineer at True9: Lead the back-end - write clean, maintainable, and scalable code using PHP and frameworks like Symfony across ...

regulated industry through AI. They have built breakthrough AI technology to transform a $9 trillion global industry, and are looking for a hands-on Senior Python Engineer to grow their high level existing team! As a Senior Product Engineer, you will help to build the first … reason across millions of documents immediately. What You'll Do Architect the backbone of a revolutionary system Pioneer breakthrough Performance Engineering Lead technical innovation Engineer systems that transform an industry What They're Looking For 12+ years of Python Development experience, ideally experience in distributed systems Deep systems architecture ...

adoption of AI in financial services accelerates, and we're now scaling our engineering organisation to meet that demand. Our engineering team includes experienced software engineers and PhD-level AI specialists, with strong ties to the University of Edinburgh, giving you access to exceptional expertise and opportunities for continuous … learning as part of the day-to-day work. The Role As a Software Engineer at Aveni, you'll be responsible for building and scaling the products that sit on top of FinLLM (the UK's first LLM for the Financial Services industry) and other LLMs, enabling financial ...

Senior ServiceNow Developer Client: Major UK Retail Organisation Platform: ServiceNow Focus: CMS Architecture, Service Portal 3.0, Integrations, Technical Leadership Role Overview The Senior ServiceNow Developer will take a technical leadership role within the ServiceNow CMS and Service Portal programme, working closely with the Lead Digital Architect, Business Analysts … development tasks across junior and mid-level developers. Ensure consistent code quality, performance, and maintainability across the team. Business & UX Collaboration Work closely with Senior Business Analysts and UX/UI stakeholders to: Validate and refine user stories Ensure acceptance criteria fully cover functional and non-functional requirements Provide ...

Title: Forward Deployed Engineer – AI & Customer-Facing Technical Leader Location: Remote Travel: Customer visits 4–5 days/month; occasional team gatherings Salary: Senior: €130–150k base + growth trajectory Principal: €160–200k base + package discussion Tech: Python, JavaScript, Azure, AWS, AI, LLM's, RAG Industry … Consultancy The Role We're looking for talented engineers to join our customer-facing AI practice, from Senior Forward Deployed Engineers through to Principal-level AI technical leaders. You'll work directly with clients to uncover problems, build prototypes, and guide full AI-enabled solution lifecycles. This ...

Software Engineering role Paying between £80-100k, with a 10% bonus (performance related) Remote but occasional offsites in LDN/worldwide A SaaS platform that provides businesses and researchers with high-quality, vetted human data for studies, surveys, and AI research are looking for 2 excellent Product Engineers. … then this role would be perfect for you. A good example given is if you notice an issue in there stack, they want an engineer pragmatic and experienced enough to fix that problem, and engineers who are proactive problem solvers. This role is remote with occasional offsites, a brilliant ...

Do you ever get the feeling you are being treated like just another number, a cog in the machine? Business politics and lack of defined progression pathways leaving your career progression hamstrung? If you want ...