1 to 25 of 828 Permanent Legacy Code Jobs in the UK excluding London

working and successful company who create and develop all their own business systems and digital products - from ecommerce and websites through to logistics and legacy systems - new tech to legacy. Their work is based around SOLID principles and Agile delivery. About our client: They are the UKs number one … to pick things up Driven by high standards Able to work within an agreed structure Self-motivated and a problem solver Able to decipher legacy code (ideally) In depth training and induction programme Responsibilities in the role of Team Leader/Manager - Full Stack Software Developer : Lead a … Work to best practice in UI/UX design to implement responsive and user-friendly interfaces using SASS and Node.js Troubleshoot, debug, and optimise code Mentor and guide junior developers, fostering a culture of continuous learning and improvement Ensure code quality and adherence to coding standards through code More ❯

of MVC architecture and modern software design patterns. Front-End Technologies Proficiency in front-end technologies such as SASS, Node.js, and modern JavaScript frameworks. Legacy Code and Refactoring Experience working with legacy code and refactoring techniques is advantageous. Problem-Solving Abilities Excellent problem-solving skills and More ❯

working closely with internal teams. What you’ll be doing: Developing and maintaining business-critical applications using .NET 6+ and C# Rewriting and improving legacy business logic Collaborating with internal departments to improve and modernise our systems Writing efficient SQL queries and working directly with databases What we’re … looking for: ✅ Strong skills in C# and SQL ✅ Solid experience with .NET 6 or newer ✅ Confident maintaining and refactoring legacy code ✅ Able to work independently with minimal supervision Bonus points for: ⭐ Experience with SQL stored procedures/functions ⭐ Knowledge of REST and GraphQL APIs ⭐ Familiarity with DB2 , SOAP … Stable, growing company in the manufacturing sector 👥 Supportive team environment 📍 Onsite role in Sutton Coldfield If you’re passionate about clean code, improving legacy systems, and building reliable business solutions, we’d love to connect! 👉 Apply now or drop us a message to learn more. #DotNet #CSharp #DeveloperJobs More ❯

working closely with internal teams. What you’ll be doing: Developing and maintaining business-critical applications using .NET 6+ and C# Rewriting and improving legacy business logic Collaborating with internal departments to improve and modernise our systems Writing efficient SQL queries and working directly with databases What we’re … looking for: ✅ Strong skills in C# and SQL ✅ Solid experience with .NET 6 or newer ✅ Confident maintaining and refactoring legacy code ✅ Able to work independently with minimal supervision Bonus points for: ⭐ Experience with SQL stored procedures/functions ⭐ Knowledge of REST and GraphQL APIs ⭐ Familiarity with DB2 , SOAP … Stable, growing company in the manufacturing sector Supportive team environment Onsite role in Sutton Coldfield If you’re passionate about clean code, improving legacy systems, and building reliable business solutions, we’d love to connect! Apply now or drop us a message to learn more. #DotNet #CSharp #DeveloperJobs More ❯

working closely with internal teams. What you’ll be doing: Developing and maintaining business-critical applications using .NET 6+ and C# Rewriting and improving legacy business logic Collaborating with internal departments to improve and modernise our systems Writing efficient SQL queries and working directly with databases What we’re … looking for: ✅ Strong skills in C# and SQL ✅ Solid experience with .NET 6 or newer ✅ Confident maintaining and refactoring legacy code ✅ Able to work independently with minimal supervision Bonus points for: ⭐ Experience with SQL stored procedures/functions ⭐ Knowledge of REST and GraphQL APIs ⭐ Familiarity with DB2 , SOAP … Stable, growing company in the manufacturing sector 👥 Supportive team environment 📍 Onsite role in Sutton Coldfield If you’re passionate about clean code, improving legacy systems, and building reliable business solutions, we’d love to connect! 👉 Apply now or drop us a message to learn more. #DotNet #CSharp #DeveloperJobs More ❯

working closely with internal teams. What you’ll be doing: Developing and maintaining business-critical applications using .NET 6+ and C# Rewriting and improving legacy business logic Collaborating with internal departments to improve and modernise our systems Writing efficient SQL queries and working directly with databases What we’re … looking for: ✅ Strong skills in C# and SQL ✅ Solid experience with .NET 6 or newer ✅ Confident maintaining and refactoring legacy code ✅ Able to work independently with minimal supervision Bonus points for: ⭐ Experience with SQL stored procedures/functions ⭐ Knowledge of REST and GraphQL APIs ⭐ Familiarity with DB2 , SOAP … Stable, growing company in the manufacturing sector 👥 Supportive team environment 📍 Onsite role in Sutton Coldfield If you’re passionate about clean code, improving legacy systems, and building reliable business solutions, we’d love to connect! 👉 Apply now or drop us a message to learn more. #DotNet #CSharp #DeveloperJobs More ❯

working closely with internal teams. What you’ll be doing: Developing and maintaining business-critical applications using .NET 6+ and C# Rewriting and improving legacy business logic Collaborating with internal departments to improve and modernise our systems Writing efficient SQL queries and working directly with databases What we’re … looking for: ✅ Strong skills in C# and SQL ✅ Solid experience with .NET 6 or newer ✅ Confident maintaining and refactoring legacy code ✅ Able to work independently with minimal supervision Bonus points for: ⭐ Experience with SQL stored procedures/functions ⭐ Knowledge of REST and GraphQL APIs ⭐ Familiarity with DB2 , SOAP … Stable, growing company in the manufacturing sector 👥 Supportive team environment 📍 Onsite role in Sutton Coldfield If you’re passionate about clean code, improving legacy systems, and building reliable business solutions, we’d love to connect! 👉 Apply now or drop us a message to learn more. #DotNet #CSharp #DeveloperJobs More ❯

SaaS | £55,000 – £65,000 DOE | Tech for Good Are you a passionate Full Stack Developer looking to make a real impact with your code? Join an award-winning EdTech SaaS company based in Huddersfield that's transforming education outcomes across the UK and internationally. You’ll be joining … Doing Collaborating in an agile, Scrum-based team to build and enhance features in our flagship education platform Solving complex problems through clean, maintainable code using best practices like SOLID, DRY, and test-first development Tracing and fixing bugs, refactoring legacy code, and contributing to architectural decisions … Advising Product Owners and cross-functional teams on technical feasibility and implementation strategies Taking the technical lead on greenfield and legacy projects alike Role Requirements 5+ years of commercial software development experience .NET/C# – including object-oriented design, greenfield dev, and working with legacy systems SQL – advanced More ❯

SaaS | £55,000 – £65,000 DOE | Tech for Good Are you a passionate Full Stack Developer looking to make a real impact with your code? Join an award-winning EdTech SaaS company based in Huddersfield that's transforming education outcomes across the UK and internationally. You’ll be joining … Doing Collaborating in an agile, Scrum-based team to build and enhance features in our flagship education platform Solving complex problems through clean, maintainable code using best practices like SOLID, DRY, and test-first development Tracing and fixing bugs, refactoring legacy code, and contributing to architectural decisions … Advising Product Owners and cross-functional teams on technical feasibility and implementation strategies Taking the technical lead on greenfield and legacy projects alike Role Requirements 5+ years of commercial software development experience .NET/C# – including object-oriented design, greenfield dev, and working with legacy systems SQL – advanced More ❯

SaaS | £55,000 – £65,000 DOE | Tech for Good Are you a passionate Full Stack Developer looking to make a real impact with your code? Join an award-winning EdTech SaaS company based in Huddersfield that's transforming education outcomes across the UK and internationally. You’ll be joining … Doing Collaborating in an agile, Scrum-based team to build and enhance features in our flagship education platform Solving complex problems through clean, maintainable code using best practices like SOLID, DRY, and test-first development Tracing and fixing bugs, refactoring legacy code, and contributing to architectural decisions … Advising Product Owners and cross-functional teams on technical feasibility and implementation strategies Taking the technical lead on greenfield and legacy projects alike Role Requirements 5+ years of commercial software development experience .NET/C# – including object-oriented design, greenfield dev, and working with legacy systems SQL – advanced More ❯

SaaS | £55,000 – £65,000 DOE | Tech for Good Are you a passionate Full Stack Developer looking to make a real impact with your code? Join an award-winning EdTech SaaS company based in Huddersfield that's transforming education outcomes across the UK and internationally. You’ll be joining … Doing Collaborating in an agile, Scrum-based team to build and enhance features in our flagship education platform Solving complex problems through clean, maintainable code using best practices like SOLID, DRY, and test-first development Tracing and fixing bugs, refactoring legacy code, and contributing to architectural decisions … Advising Product Owners and cross-functional teams on technical feasibility and implementation strategies Taking the technical lead on greenfield and legacy projects alike Role Requirements 5+ years of commercial software development experience .NET/C# – including object-oriented design, greenfield dev, and working with legacy systems SQL – advanced More ❯

on the market. Having received huge investment, they are on a journey to truly disrupt the industry and are not held back by any legacy code or old customers. This means that they're able to build out state-of-the-art, Greenfield code which can focus More ❯

on the market. Having received huge investment, they are on a journey to truly disrupt the industry and are not held back by any legacy code or old customers. This means that they're able to build out state-of-the-art, Greenfield code which can focus More ❯

on the market. Having received huge investment, they are on a journey to truly disrupt the industry and are not held back by any legacy code or old customers. This means that they're able to build out state-of-the-art, Greenfield code which can focus More ❯

on the market. Having received huge investment, they are on a journey to truly disrupt the industry and are not held back by any legacy code or old customers. This means that they're able to build out state-of-the-art, Greenfield code which can focus More ❯

and Material UI (MUI) Solid understanding of Prisma and relational databases like PostgreSQL Familiarity with internal tool development and business-focused UIs Comfort refactoring legacy code and migrating existing queries into structured code Strong communication skills and a collaborative mindset Nice-to-haves Experience with Retool or … other low-code internal tooling platforms Familiarity with Node.js and ideally Next.js (not essential, can be picked up) Previous experience in a fast-moving startup environment What you’ll do: Develop and maintain Fadmin, an internal admin tool built on React-Admin, Prisma, and MUI Collaborate with product and … Optimise application performance and user experience across different teams using Fadmin Work with authentication/authorisation mechanisms (e.g., role-based access) Write clean, maintainable code and contribute to internal documentation Support ongoing improvements to developer experience and internal tooling Why Join Fanvue? A culture that values innovation, ownership, transparency More ❯

and Material UI (MUI) Solid understanding of Prisma and relational databases like PostgreSQL Familiarity with internal tool development and business-focused UIs Comfort refactoring legacy code and migrating existing queries into structured code Strong communication skills and a collaborative mindset Nice-to-haves Experience with Retool or … other low-code internal tooling platforms Familiarity with Node.js and ideally Next.js (not essential, can be picked up) Previous experience in a fast-moving startup environment What you’ll do: Develop and maintain Fadmin, an internal admin tool built on React-Admin, Prisma, and MUI Collaborate with product and … Optimise application performance and user experience across different teams using Fadmin Work with authentication/authorisation mechanisms (e.g., role-based access) Write clean, maintainable code and contribute to internal documentation Support ongoing improvements to developer experience and internal tooling Why Join Fanvue? A culture that values innovation, ownership, transparency More ❯

and Material UI (MUI) Solid understanding of Prisma and relational databases like PostgreSQL Familiarity with internal tool development and business-focused UIs Comfort refactoring legacy code and migrating existing queries into structured code Strong communication skills and a collaborative mindset Nice-to-haves Experience with Retool or … other low-code internal tooling platforms Familiarity with Node.js and ideally Next.js (not essential, can be picked up) Previous experience in a fast-moving startup environment What you’ll do: Develop and maintain Fadmin, an internal admin tool built on React-Admin, Prisma, and MUI Collaborate with product and … Optimise application performance and user experience across different teams using Fadmin Work with authentication/authorisation mechanisms (e.g., role-based access) Write clean, maintainable code and contribute to internal documentation Support ongoing improvements to developer experience and internal tooling Why Join Fanvue? A culture that values innovation, ownership, transparency More ❯

and Material UI (MUI) Solid understanding of Prisma and relational databases like PostgreSQL Familiarity with internal tool development and business-focused UIs Comfort refactoring legacy code and migrating existing queries into structured code Strong communication skills and a collaborative mindset Nice-to-haves Experience with Retool or … other low-code internal tooling platforms Familiarity with Node.js and ideally Next.js (not essential, can be picked up) Previous experience in a fast-moving startup environment What you’ll do: Develop and maintain Fadmin, an internal admin tool built on React-Admin, Prisma, and MUI Collaborate with product and … Optimise application performance and user experience across different teams using Fadmin Work with authentication/authorisation mechanisms (e.g., role-based access) Write clean, maintainable code and contribute to internal documentation Support ongoing improvements to developer experience and internal tooling Why Join Fanvue? A culture that values innovation, ownership, transparency More ❯

and Material UI (MUI) Solid understanding of Prisma and relational databases like PostgreSQL Familiarity with internal tool development and business-focused UIs Comfort refactoring legacy code and migrating existing queries into structured code Strong communication skills and a collaborative mindset Nice-to-haves Experience with Retool or … other low-code internal tooling platforms Familiarity with Node.js and ideally Next.js (not essential, can be picked up) Previous experience in a fast-moving startup environment What you’ll do: Develop and maintain Fadmin, an internal admin tool built on React-Admin, Prisma, and MUI Collaborate with product and … Optimise application performance and user experience across different teams using Fadmin Work with authentication/authorisation mechanisms (e.g., role-based access) Write clean, maintainable code and contribute to internal documentation Support ongoing improvements to developer experience and internal tooling Why Join Fanvue? A culture that values innovation, ownership, transparency More ❯

and Material UI (MUI) Solid understanding of Prisma and relational databases like PostgreSQL Familiarity with internal tool development and business-focused UIs Comfort refactoring legacy code and migrating existing queries into structured code Strong communication skills and a collaborative mindset Nice-to-haves Experience with Retool or … other low-code internal tooling platforms Familiarity with Node.js and ideally Next.js (not essential, can be picked up) Previous experience in a fast-moving startup environment What you’ll do: Develop and maintain Fadmin, an internal admin tool built on React-Admin, Prisma, and MUI Collaborate with product and … Optimise application performance and user experience across different teams using Fadmin Work with authentication/authorisation mechanisms (e.g., role-based access) Write clean, maintainable code and contribute to internal documentation Support ongoing improvements to developer experience and internal tooling Why Join Fanvue? A culture that values innovation, ownership, transparency More ❯

and Material UI (MUI) Solid understanding of Prisma and relational databases like PostgreSQL Familiarity with internal tool development and business-focused UIs Comfort refactoring legacy code and migrating existing queries into structured code Strong communication skills and a collaborative mindset Nice-to-haves Experience with Retool or … other low-code internal tooling platforms Familiarity with Node.js and ideally Next.js (not essential, can be picked up) Previous experience in a fast-moving startup environment What you’ll do: Develop and maintain Fadmin, an internal admin tool built on React-Admin, Prisma, and MUI Collaborate with product and … Optimise application performance and user experience across different teams using Fadmin Work with authentication/authorisation mechanisms (e.g., role-based access) Write clean, maintainable code and contribute to internal documentation Support ongoing improvements to developer experience and internal tooling Why Join Fanvue? A culture that values innovation, ownership, transparency More ❯

and Material UI (MUI) Solid understanding of Prisma and relational databases like PostgreSQL Familiarity with internal tool development and business-focused UIs Comfort refactoring legacy code and migrating existing queries into structured code Strong communication skills and a collaborative mindset Nice-to-haves Experience with Retool or … other low-code internal tooling platforms Familiarity with Node.js and ideally Next.js (not essential, can be picked up) Previous experience in a fast-moving startup environment What you’ll do: Develop and maintain Fadmin, an internal admin tool built on React-Admin, Prisma, and MUI Collaborate with product and … Optimise application performance and user experience across different teams using Fadmin Work with authentication/authorisation mechanisms (e.g., role-based access) Write clean, maintainable code and contribute to internal documentation Support ongoing improvements to developer experience and internal tooling Why Join Fanvue? A culture that values innovation, ownership, transparency More ❯

and Material UI (MUI) Solid understanding of Prisma and relational databases like PostgreSQL Familiarity with internal tool development and business-focused UIs Comfort refactoring legacy code and migrating existing queries into structured code Strong communication skills and a collaborative mindset Nice-to-haves Experience with Retool or … other low-code internal tooling platforms Familiarity with Node.js and ideally Next.js (not essential, can be picked up) Previous experience in a fast-moving startup environment What you’ll do: Develop and maintain Fadmin, an internal admin tool built on React-Admin, Prisma, and MUI Collaborate with product and … Optimise application performance and user experience across different teams using Fadmin Work with authentication/authorisation mechanisms (e.g., role-based access) Write clean, maintainable code and contribute to internal documentation Support ongoing improvements to developer experience and internal tooling Why Join Fanvue? A culture that values innovation, ownership, transparency More ❯

and Material UI (MUI) Solid understanding of Prisma and relational databases like PostgreSQL Familiarity with internal tool development and business-focused UIs Comfort refactoring legacy code and migrating existing queries into structured code Strong communication skills and a collaborative mindset Nice-to-haves Experience with Retool or … other low-code internal tooling platforms Familiarity with Node.js and ideally Next.js (not essential, can be picked up) Previous experience in a fast-moving startup environment What you’ll do: Develop and maintain Fadmin, an internal admin tool built on React-Admin, Prisma, and MUI Collaborate with product and … Optimise application performance and user experience across different teams using Fadmin Work with authentication/authorisation mechanisms (e.g., role-based access) Write clean, maintainable code and contribute to internal documentation Support ongoing improvements to developer experience and internal tooling Why Join Fanvue? A culture that values innovation, ownership, transparency More ❯