50 software engineer jobs found

Senior Software Engineer - Kotlin & Coroutines. £500/day LTD CO OUTSIDE IR35. 100% REMOTE. An interest in AI (Agentic AI, AI tooling, Claude, Codex or Co-Pilot) highly advantageous but not essential. We are looking for a Senior Backend Engineer (Kotlin & Coroutines essential) to build the integrations that connect AI companion with senior care and hospital software platforms. In this role, you will design, build, and maintain robust Back End services and integrations that enable seamless data exchange between the company and partner systems. You'll take end-to-end ownership of integration projects-from discovery and architecture through implementation, deployment, and continuous improvement. Key Responsibilities for the Kotlin & Coroutines Developer are: Design, develop, and maintain integrations between my clients platform and third-party healthcare and senior care software systems. Build scalable, secure, and maintainable Back End services and APIs using...

Senior Java & Kotlin Backend Engineer Location: London (Hybrid - Wednesday office attendance required) Contract: Initial 2 months IR35: Outside IR35 Start Date: ASAP The Role We're working with a leading technology organisation seeking an experienced Senior Java & Kotlin Backend Engineer to join their engineering team on an initial two-month contract click apply for full job details

A Contract position Outside IR35 Hybrid working 3 days on site Our client, a leader in the automotive sector, is currently seeking a Senior Controls Software Engineer to join their dynamic team on a contract basis. This role involves working on the development of Inverter and Motor Control, Battery Management System (BMS), and Charging application software for demonstrator and production projects. You will play a pivotal role in all stages of the software development process, mentor junior engineers, participate in project estimations and planning, and collaborate with clients, suppliers, and other engineering teams. Key Responsibilities: Provide technical delivery and leadership of application software activities Support and mentor junior engineers within the team Create and manage software requirements Participate in the architectural design of the software Implement and test the application software using a model-based development approach Support prototype vehicle...

Senior Java & Kotlin Backend Engineer Location: London (Hybrid - Wednesday office attendance required) Contract: Initial 2 months IR35: Outside IR35 Start Date: ASAP The Role We're working with a leading technology organisation seeking an experienced Senior Java & Kotlin Backend Engineer to join their engineering team on an initial two-month contract. This role offers the opportunity to contribute to greenfield backend development, building scalable, cloud-native microservices within a modern engineering environment. You'll work alongside cross-functional teams to design, develop and deliver high-quality backend solutions that are secure, reliable and built for scale. Key Responsibilities Design, develop and maintain backend services using Java and Kotlin. Build and enhance RESTful APIs within a microservices architecture. Develop secure, scalable and high-performance applications. Collaborate with Product Managers, Engineers and technical...

A contract Outside IR35 Hybrid - Must be able to do 3 days on site Full lifecycle Embedded C to MISRA development - Aerospace, DO178B/C, Model-Based development. Our client, a key player in the aerospace sector, is currently searching for an Embedded Software Engineer to join their team on a contract basis. This role presents a unique opportunity to work on cutting-edge aerospace projects, focusing on developing and integrating software for advanced controller platforms. Key Responsibilities: Develop embedded software for our controller platform. Produce requirements, design, implementation, and tests for software components. Ensure software life cycle data is produced in accordance with development processes and procedures. Perform hardware/software integration for debugging, verification, and release of software. Contribute improvements to internal procedures and standards. Job Requirements: Bachelor's degree in a related engineering discipline (or equivalent...

Senior Java & Kotlin Backend Engineer Location: London (Hybrid - Wednesday office attendance required) Contract: Initial 2 months IR35: Outside IR35 Start Date: ASAP The Role We're working with a leading technology organisation seeking an experienced Senior Java & Kotlin Backend Engineer to join their engineering team on an initial two-month contract. This role offers the opportunity to contribute to greenfield backend development, building scalable, cloud-native microservices within a modern engineering environment. You'll work alongside cross-functional teams to design, develop and deliver high-quality backend solutions that are secure, reliable and built for scale. Key Responsibilities Design, develop and maintain backend services using Java and Kotlin. Build and enhance RESTful APIs within a microservices architecture. Develop secure, scalable and high-performance applications. Collaborate with Product Managers, Engineers and technical...

Senior Java & Kotlin Backend Engineer Location: London (Hybrid - Wednesday office attendance required) Contract: Initial 2 months IR35: Outside IR35 Start Date: ASAP The Role We 're working with a leading technology organisation seeking an experienced Senior Java & Kotlin Backend Engineer to join their engineering team on an initial two-month contract. This role offers the opportunity to contribute to greenfield backend development, building scalable, cloud-native microservices within a modern engineering environment. You 'll work alongside cross-functional teams to design, develop and deliver high-quality backend solutions that are secure, reliable and built for scale. Key Responsibilities Design, develop and maintain backend services using Java and Kotlin. Build and enhance RESTful APIs within a microservices architecture. Develop secure, scalable and high-performance applications. Collaborate with...

Opportunity for a Principal Software Engineer to work for a retail company near Manchester going through a large digital transformation. This is an initial 6-month contract outside IR35 to help deliver re-platforming of existing systems to an event-driven MACH architecture. Skills: TypeScript, Node, React AWS, Lambdas Event-driven MACH architecture CI/CD In return they're offering an initial 6-month outside IR35 contract paying up to £600/day. If you're interested and would like to know more, please apply through this advert and I'll be in touch.

Opportunity for a Senior Software Engineer to work for a retail company near Manchester going through a large digital transformation. This is an initial 6-month contract outside IR35 to help deliver re-platforming of existing systems to an event-driven MACH architecture. Skills: TypeScript, Node, React AWS, Lambdas Event-driven MACH architecture CI/CD In return they're offering an initial 6-month outside IR35 contract paying up to £500/day. If you're interested and would like to know more, please apply through this advert and I'll be in touch.

Candidate Specification - SourceWise Solutions Staff Software Engineer (Backend / Platform) This is a remote contract role with occasional visits to the client's office when required. The engagement is Outside IR35, offering a daily rate of £500 About SourceWise SourceWise Solutions partners with innovative global technology companies to build high-performing engineering teams. We connect experienced engineers with organisations building modern, scalable software platforms. About the Opportunity This Staff Software Engineer role is with one of our international technology clients. You will influence architecture, engineering practices, and technical direction while solving complex, high-impact problems. Key Responsibilities · Lead architecture and design of scalable distributed systems. · Own complex cross-team engineering challenges. · Drive technical strategy and influence engineering decisions. · Improve platform scalability, reliability,...

Candidate Specification - SourceWise Solutions Staff Software Engineer (Backend / Platform) This is a remote contract role with occasional visits to the client's office when required. The engagement is Outside IR35, offering a daily rate of £500 About SourceWise SourceWise Solutions partners with innovative global technology companies to build high-performing engineering teams. We connect experienced engineers with organisations building modern, scalable software platforms. About the Opportunity This Staff Software Engineer role is with one of our international technology clients. You will influence architecture, engineering practices, and technical direction while solving complex, high-impact problems. Key Responsibilities · Lead architecture and design of scalable distributed systems. · Own complex cross-team engineering challenges. · Drive technical strategy and influence engineering decisions. · Improve platform scalability, reliability, and maintainability. ·...

Software Engineer - Avionics/Mission Systems (C++/Ada) - 119393 Location: Bristol (preferred) with regular travel to Yeovil for testing and meetings Duration: 6 months IR35 Status: Outside IR35 Rate: Competitive (dependent on experience) Clearance: BPSS - SC Overview We are seeking an experienced Software Engineer to support the development of mission-critical avionics and aerospace software system click apply for full job details

Software Engineer - Modern .NET/Distributed Systems Contract opportunity supporting mission-critical public safety communication systems Location: Remote/Hybrid UK 6 months Rolling Contract Rate: £45 per hour IR35 Status: Outside IR35 Overview We are looking for an experienced Software Engineer with strong, hands-on modern .NET experience to join a team delivering robust software for critical communication and public safety environments. The client is looking for someone who can hit the ground running with coding in modern .NET, contribute quickly to an established codebase, and work confidently across distributed systems where reliability, maintainability, and observability are important. The Role You will be working on software used within complex, real-world communication systems. The role requires practical, current experience with modern .NET rather than exposure to one specific latest version. The focus is on solid engineering ability, strong C# coding skills,...

🚨 Senior Playwright SDET | £700/day | Outside IR35 | Front Office Trading | London I'm working with a leading global investment bank looking to hire an exceptional Playwright SDET to join their Front Office Derivatives Technology team. This isn't your typical automation role. You'll be embedded within a high-performing engineering team, working directly alongside developers on a strategic front end trading platform. The rate reflects the calibre of engineer they're looking for. 💰 Package £700 per day Outside IR35 12-month rolling contract 1 day per week in the London office What they're looking for This role is suited to a highly technical SDET who is passionate about automation and enjoys writing production-quality code. You must have: ✅ Strong commercial experience with Playwright ✅ Excellent coding skills in JavaScript and TypeScript ✅ Experience building and maintaining automation frameworks ✅ Previous experience working on...

🚀 Job Opportunity: Senior C# Quantitative Risk Developer | Capital Markets Technology Location: London Type: Full-time / Contract Rate: £800 p/d (Outside IR35) Client: Leading Global Investment Bank Hybrid: 1 day per week in the office Are you ready to be at the forefront of technology and finance? Our client, a top-tier investment bank, is looking for a Senior C# Quantitative Risk Developer to join their high-impact Capital Markets Technology team in London. This is a unique opportunity to bridge the worlds of quantitative analysis and software engineering—delivering cutting-edge solutions to drive pricing, risk management, and liquidity strategies in real-time trading environments. 🔍 About the Role As a Senior Quantitative Developer, you’ll collaborate closely with quantitative analysts, traders, and fellow technologists to develop and optimize core components of the bank’s pricing, risk and valuations infrastructure. You'll be responsible for...

Embedded Software Engineer | Outside IR35 | Cambridge The client is still looking for specialist embedded software development services to deliver defined firmware components for an embedded Linux platform. 6 of these positions have already been filled, and there are still open vacancies here ! I encourage you to apply if you have any recent experience developing software on an embedded Linux platfor m. Scope of Servi cesDevelopment of embedded Linux firmware for target hardware platforms (OMAP & iMX6), including kernel configuration, BSP updates, and device driver enablem entImplementation of software required to support platform bring-up and peripheral integration (e.g. UART, SPI, I2C, PC Ie)Integration of firmware into the wider system, ensuring compatibility with existing software compone ntsInvestigation and resolution of technical issues relating to firmware, including hardware/software interaction fau ltsProduction of supporting artefacts (design...

JOB TITLE: DevOps Engineer - DV Cleared Rate: £550-£600/day (Outside IR35) Location: Onsite Clearance: DV Cleared (Mandatory) Flexible Work Option: Condensed working week (e.g., 3 long days, paid for 5) Job Summary We are seeking a technically skilled DevOps & Software Engineer with DV clearance to contribute across the full software development lifecycle and DevOps toolchain. You will design, implement, and maintain scalable, secure, and automated CI/CD pipelines, infrastructure-as-code (IaC), and system monitoring frameworks to support the continuous delivery of secure and reliable software. This role demands a strong grasp of modern DevOps practices, cloud and container technologies, automation tooling, and software engineering principles. You will work closely with development, security, and operations teams to drive a culture of DevSecOps and continuous improvement. Key Responsibilities Design, build, and maintain scalable CI/CD pipelines using modern DevOps...

Greetings from Response Informatics!! We are currently hiring a Dot net Developer for an exciting client engagement. Role: Dot net Developer  Location: Taunton, UK (3 days' travel per month) Positions: Contract (Outside IR35) Clearance: Active SC Clearance Mandatory Please ensure: CV is a maximum of 3 pages Font size: 11 We are seeking an experienced Senior Software Engineer to design, develop, and maintain enterprise-scale Azure-based applications within a secure and highly regulated environment. The role requires strong hands-on expertise in C#, .NET, Azure, and cloud-native development practices. The Senior Software Developer will work closely with Lead Developers, Architects, DevOps Engineers, Testers, and Product Owners to deliver secure, scalable, and maintainable solutions while contributing to engineering excellence and continuous improvement initiatives. Key Responsibilities Design, develop, and maintain applications...

JOB TITLE: DevOps Engineer - DV Cleared Rate: £550-£600/day (Outside IR35) Location: Onsite Clearance: DV Cleared (Mandatory) Flexible Work Option: Condensed working week (eg, 3 long days, paid for 5) Job Summary We are seeking a technically skilled DevOps & Software Engineer with DV clearance to contribute across the full software development life cycle and DevOps toolchain. You will design, implement, and maintain scalable, secure, and automated CI/CD pipelines, infrastructure-as-code (IaC), and system monitoring frameworks to support the continuous delivery of secure and reliable software. This role demands a strong grasp of modern DevOps practices, cloud and container technologies, automation tooling, and software engineering principles. You will work closely with development, security, and operations teams to drive a culture of DevSecOps and continuous improvement. Key Responsibilities Design, build, and maintain scalable CI/CD pipelines using modern...

ML Engineer (Early Career - Mid-level) New contract role | Immediate starter - Just in! Opus have partnered with an cutting-edge AI focused HealthTech start-up with a mission-driven culture and ethical AI approach. The successful candidate will be making a real impact to patient care outcomes.  Contract Specifics: Rate: £400 per day, Outside IR35 Duration: 3 months  Start date: ASAP, Immediate starter  Working Patterns: Full-time, 1 day p/w in London-offices. Person Specification:  - Solid skills in Python, SQL and AWS.  - Background in Software Engineering / Data Engineering | Previous back-end work is nice to have  - Experience working with ML models (productisation, not just for research / prototyping)  Nice to have:  - A deeper understanding on ML Models / ML Data Science from an API perspective (GraphQL, gRPC, REST)  - Start-up or HealthTech experience.  This is an urgent requirement, please reach out ASAP to Adam Akhtar today (17th July) to avoid missing out!