1 to 25 of 33 Senior Software Engineer Jobs in Wales

Senior Software Engineer – C/C++ ARCA is currently looking for a Senior Software Engineer to join on a short-term contract to help support an automotive/motorsport engineering programme. This role suits someone comfortable working close to real-time systems, networking … performance-critical software, typically found in vehicle platforms, simulation, data or control environments. Key Responsibilities Develop and maintain high-performance C/C++ software Work on concurrent, parallel and asynchronous systems Contribute to distributed, real-time architectures (pub/sub models, time-synchronised systems) Key Skills & Experience Strong ...

Senior Software Engineer (Blockchain) Location: Remote Salary: Up to £120,000 + Bonus Are you ready to shape the future of digital finance? We're partnering with a pioneering organisation at the forefront of blockchain innovation to find a Senior Software Engineer who thrives … with cross-functional teams to ensure compliance, scalability, and security. Drive engineering excellence through best practices, testing, and mentorship. What We're Looking For: Senior level experience in fullstack and blockchain engineering. Deep expertise in Solidity, TypeScript, and EVM-based smart contract development. Strong understanding of DeFi primitives, stablecoin ...

Senior Software Engineer (Blockchain) Location: Remote Salary: Up to £120,000 + Bonus Are you ready to shape the future of digital finance? We're partnering with a pioneering organisation at the forefront of blockchain innovation to find a Senior Software Engineer who thrives … with cross-functional teams to ensure compliance, scalability, and security. Drive engineering excellence through best practices, testing, and mentorship. What We're Looking For: Senior level experience in fullstack and blockchain engineering. Deep expertise in Solidity, TypeScript, and EVM-based smart contract development. Strong understanding of DeFi primitives, stablecoin ...

Great place to Work’ for several years running. Due to a large amount of continued growth we’re looking to hire 4-5 Software Engineers within their tech agnostic engineering teams. The team work remotely so candidates based throughout the UK are welcome to apply but a Cardiff based … living and working within the UK. This is a fantastic time to join their product teams who have a wide range of technology products, software and services on offer. Being an experienced Engineer you will also contribute to a wide range of development projects whilst championing engineering excellence ...

Title: Senior Software Engineer Location: Cardiff (1 day a week in the office) Salary: £65,000 + pension + bonus Hours: 35-hour week, flexible around life If you’re happiest when you’re coding, experimenting, and seeing the impact of what you build, this team will … generation or internal demos but automation, data grading, and defect detection built into live systems used by global clients. This is a hands-on senior engineering role for someone who wants to stay close to the code, solve meaningful problems, and work with genuinely modern tech, from AWS microservices ...

About The Role Job Level: 9 UK Wide We are looking for a Senior Software Engineer who will be responsible for designing, developing, and deploying high-quality software solutions. You will work on complex software projects, contributing to the architecture, development, and improvement of software systems. This role involves mentoring junior engineers, collaborating with cross-functional teams, and driving the adoption of best practices in software development. Responsibilities Design, develop, and maintain complex software solutions, ensuring they are robust, secure, tested and scalable. Contribute to software architecture decisions, ensuring alignment with ...

Senior+ Software Engineer - Python | FastAPI | AWS £90,000-120,000 + Bonus and Stock Flexible benefits | 90 day work-from-anywhere perk Python, FastAPI, gRPC, AWS Remote first or hybrid (London) InsurTech | high traffic, scalable, event-driven, microservices development We've partnered with … years. Following a successful profitability push, they're now entering a growth phase and expanding their product offering. As a Lead/Senior+ Software Engineer you'll help drive technical direction and architecture within a product-led squad environment, rotating across business domains. This is an opportunity ...

Senior+ Software Engineer - Python | FastAPI | AWS £90,000-120,000 + Bonus and Stock Flexible benefits | 90 day work-from-anywhere perk Python, FastAPI, gRPC, AWS Remote first or hybrid (London) InsurTech | high traffic, scalable, event-driven, microservices development We've partnered with … years. Following a successful profitability push, they're now entering a growth phase and expanding their product offering. As a Lead/Senior+ Software Engineer you'll help drive technical direction and architecture within a product-led squad environment, rotating across business domains. This is an opportunity ...

Title: Senior Software Engineer (.NET + React) Job Type: Permanent Location: UK Remote based Salary: £70,000-£80,000 (DOE) Skills: C#, .NET Core, React (Typescript), Azure, Microservices, Design Patterns Roc Search are seeking a Senior Software Developer with .NET and React experience to join … collaborative dev team building globally used, cloud-based products. This is a hands-on role covering development, research, and maintenance across the full software development lifecycle. This is a fully remote role but they do have an office based in London. It is a greenfield project where you will ...

Title: Senior Software Engineer (.NET + React) Job Type: Permanent Location: UK Remote based Salary: £70,000-£80,000 (DOE) Skills: C#, .NET Core, React (Typescript), Azure, Microservices, Design Patterns Roc Search are seeking a Senior Software Developer with .NET and React experience to join … collaborative dev team building globally used, cloud-based products. This is a hands-on role covering development, research, and maintenance across the full software development lifecycle. This is a fully remote role but they do have an office based in London. It is a greenfield project where you will ...

seeking a Senior Software Engineer to work on safety-critical software and embedded systems for medical and consumer health products. Contract- £500 per day Key Requirements: Strong C/C++ skills for embedded development Experience with embedded Linux or RTOS environments Knowledge … standards for medical software Understanding of wired/wireless communication protocols (I2C, UART, SPI, Bluetooth LE) Ability to write clear, structured documentation and collaborate in multidisciplinary teams Desirable: Experience with Qt GUI development Familiarity with secure coding standards or IEC 81001-5 Integration with hospital/healthcare systems (DICOM ...

About The Role Job Level: 9UK Wide We are looking for a Senior Software Engineer who will be responsible for designing, developing, and deploying high-quality software solutions. You will work on complex software projects, contributing to the architecture, development, and improvement of software ...

About The Role Job Level: 9 UK Wide We are looking for a Senior Software Engineer who will be responsible for designing, developing, and deploying high-quality software solutions. You will work on complex software projects, contributing to the architecture, development, and improvement of software ...

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 ...

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 ...

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 ...

looking for an experienced Senior Python Software Engineer to take ownership of an established trading-related application and drive its ongoing development. You will manage and enhance the existing codebase, deliver new features, ensure reliability and performance, and help evolve the system as the business grows. This ...

looking for an experienced Senior Python Software Engineer to take ownership of an established trading-related application and drive its ongoing development. You will manage and enhance the existing codebase, deliver new features, ensure reliability and performance, and help evolve the system as the business grows. This ...

Role: AWS Software Engineer Location: UK (Remote) Type : Permanent Job Description: • Design, develop, and maintain scalable backend services on AWS. Build event-driven architectures using SQS, Kafka, Kinesis, or RabbitMQ. • Develop high-performance applications using Scala. • Design and integrate data solutions using SQL and NoSQL databases (e.g. ...

Role: AWS Software Engineer Location: UK (Remote) Type : Permanent Job Description: • Design, develop, and maintain scalable backend services on AWS. Build event-driven architectures using SQS, Kafka, Kinesis, or RabbitMQ. • Develop high-performance applications using Scala. • Design and integrate data solutions using SQL and NoSQL databases (e.g. ...

Senior Backend/Full Stack Engineer (Contract) – Integrations Team Outside IR35/B2B | Fully Remote Evantis is partnering with a fast-moving tech company that's expanding a newly formed integrations-focused engineering team, responsible for how external partners connect into their platform. We're looking for hands … Operating in a startup-style environment where priorities can evolve week to week What we're looking for Strong hands-on backend engineering experience (senior IC level) Deep practical experience with Node.js, TypeScript, REST APIs Comfortable explaining and delivering implementation detail, not just high-level design Experience integrating with ...

Senior Backend/Full Stack Engineer (Contract) – Integrations Team Outside IR35/B2B | Fully Remote Evantis is partnering with a fast-moving tech company that's expanding a newly formed integrations-focused engineering team, responsible for how external partners connect into their platform. We're looking for hands … Operating in a startup-style environment where priorities can evolve week to week What we're looking for Strong hands-on backend engineering experience (senior IC level) Deep practical experience with Node.js, TypeScript, REST APIs Comfortable explaining and delivering implementation detail, not just high-level design Experience integrating with ...

DESCRIPTION We are searching for a decisive and insightful DevOps engineer to join our client. The DevOps engineer will be involved in various stages of each product's lifespan and should remain abreast of technological advancements to promote efficiency. You should also keep track of customer reviews … enhance marketability. To ensure success as a DevOps engineer, you should ensure that all outputs remain safe for public consumption. Ultimately, a top-notch DevOps engineer will demonstrate excellent leadership skills and the capacity to mentor junior staff. DevOps Engineer Responsibilities: Collaborating with coworkers to conceptualize, develop ...

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 ...