26 to 50 of 53 Senior Software Engineer Jobs in Hertfordshire

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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. ...

client is a US based software company, operating into the media and entertainment sector. Due to their ongoing success, they are looking for a Lead/Senior Software Developer, based in the UK. This will be working on their existing solutions but mainly focusing on the development … exciting new product. The company is around 5 years old and during that time it has successfully implemented its software into three of the UK's major broadcasters. You will be a problem solver, with a passion for designing and developing impactful products, you will have an expert level ...

client is a US based software company, operating into the media and entertainment sector. Due to their ongoing success, they are looking for a Lead/Senior Software Developer, based in the UK. This will be working on their existing solutions but mainly focusing on the development … exciting new product. The company is around 5 years old and during that time it has successfully implemented its software into three of the UK's major broadcasters. You will be a problem solver, with a passion for designing and developing impactful products, you will have an expert level ...

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 ...

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 ...

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 ...

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 ...

/2x per month) to either London, Manchester, Newcastle, or Glasgow. You will be able to pick a location nearest to you. As a Senior Java Full Stack Engineer, you'll work on complex, high-visibility projects—building modern, scalable digital products that drive real business change. … Node.js, React, microservices, Docker, CI/CD pipelines, and cloud platforms (AWS/Azure). What We're Looking For Required 5 years commercial software engineering experience Strong experience building microservices with Java (Spring Boot) Proficiency with JavaScript/TypeScript, including building front-end applications with React, HTML ...

/2x per month) to either London, Manchester, Newcastle, or Glasgow. You will be able to pick a location nearest to you. As a Senior Java Full Stack Engineer, you'll work on complex, high-visibility projects—building modern, scalable digital products that drive real business change. … Node.js, React, microservices, Docker, CI/CD pipelines, and cloud platforms (AWS/Azure). What We're Looking For Required 5 years commercial software engineering experience Strong experience building microservices with Java (Spring Boot) Proficiency with JavaScript/TypeScript, including building front-end applications with React, HTML ...

/2x per month) to either London, Manchester, Newcastle, or Glasgow. You will be able to pick a location nearest to you. As a Senior Java Full Stack Engineer, you'll work on complex, high-visibility projects—building modern, scalable digital products that drive real business change. … Node.js, React, microservices, Docker, CI/CD pipelines, and cloud platforms (AWS/Azure). What We're Looking For Required 5 years commercial software engineering experience Strong experience building microservices with Java (Spring Boot) Proficiency with JavaScript/TypeScript, including building front-end applications with React, HTML ...

currently working with an exceptional software development team who are looking to add 2 more heads to their software development team. You'll be learning and working with some of the best C++ developers in the business and will get the opportunity to progress as you gain more … experience. With a fully remote working environment and a great work life balance (they don't believe working long hours is conducive to optimal software development) there is a great amount of flexibility. They also offer a great starting salary with great room for progression. What they are looking ...

currently working with an exceptional software development team who are looking to add 2 more heads to their software development team. You'll be learning and working with some of the best C++ developers in the business and will get the opportunity to progress as you gain more … experience. With a fully remote working environment and a great work life balance (they don't believe working long hours is conducive to optimal software development) there is a great amount of flexibility. They also offer a great starting salary with great room for progression. What they are looking ...