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        31 Permanent API jobs in Barnsley + 20 miles

        72 exact matches jobs are outside your preferred location

        Back End .Net Developer

        Rebel Recruitment
        M1, Manchester
        From £40,000 to £50,000 per annum
        Role: Back End .Net Developer - Location: Manchester - Working Model: Co-working space, hybrid working of once per week- ideally Wednesday- in the office. Salary: £50k plus benefits - You think in systems: you naturally see how things should fit together and are great at building the solution, too. Breaking down a monolith into a service-based, distributed architecture is something youve had experience of doing and understand what good looks likeand what not so good looks like too! Youd love to move into the tech4good space and put your technical skills to good use by helping us and the planet to be more sustainable. If this sounds like you, read on- this is the one for you! Working with a small tech4good company in the EV space, with a co-working space in Manchester, I am looking for you a back-end .NET Developer who is talented, enthusiastic, and curious.
        Role: Back End .Net Developer - Location: Manchester - Working Model: Co-working space, hybrid working of once per week- ideally Wednesday- in the office. Salary: £50k plus benefits - You think in systems: you naturally see how things should fit together and are great at building the solution, too. Breaking down a monolith into a service-based, distributed architecture is something youve had experience of doing and understand what good looks likeand what not so good looks like too! Youd love to move into the tech4good space and put your technical skills to good use by helping us and the planet to be more sustainable. If this sounds like you, read on- this is the one for you! Working with a small tech4good company in the EV space, with a co-working space in Manchester, I am looking for you a back-end .NET Developer who is talented, enthusiastic, and curious.
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        NEW

        Principal Back-End Developer - Manchester City Centre

        Searchability (UK) Ltd
        M1, Manchester
        £70000 - £80000 per annum + Pension, 25 days holiday, Profit Share
        Join a developer-led culture where innovation meets impact. Our client is looking for a visionary Principal Back-End Developer to help shape the future of their SaaS platform. You'll set the technical direction, drive cutting-edge development, and mentor a talented team-all while delivering high-quality, resilient services that make a real difference. * Lead back-end architecture and strategy, aligning tech with business goals. * Build and deliver scalable, high-performing SaaS products. * Mentor and grow a passionate development team. * Refine processes and explore tools that boost efficiency. * Mastery of C# (.NET 6+), SQL Server, and TDD (NUnit). * Expertise in RESTful & GraphQL APIs, Git, and SOLID principles. * Strategic thinking, strong communication, and a love for collaboration. * Bonus: Experience with Azure, DevOps, Entity Framework, and observability practi
        Join a developer-led culture where innovation meets impact. Our client is looking for a visionary Principal Back-End Developer to help shape the future of their SaaS platform. You'll set the technical direction, drive cutting-edge development, and mentor a talented team-all while delivering high-quality, resilient services that make a real difference. * Lead back-end architecture and strategy, aligning tech with business goals. * Build and deliver scalable, high-performing SaaS products. * Mentor and grow a passionate development team. * Refine processes and explore tools that boost efficiency. * Mastery of C# (.NET 6+), SQL Server, and TDD (NUnit). * Expertise in RESTful & GraphQL APIs, Git, and SOLID principles. * Strategic thinking, strong communication, and a love for collaboration. * Bonus: Experience with Azure, DevOps, Entity Framework, and observability practi
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        NEWFEATURED

        Senior Full Stack Engineer

        Daniel James Resourcing Ltd
        Manchester, Greater Manchester, M60 7RA
        £65000 - £70000 per annum, Benefits 5-10% Bonus
        Our client, a highly profitable enterprise SaaS business at the very heart of industry innovation, is assembling a brand-new greenfield engineering team to drive a major technical transformation. With an ambitious target of uplifting senior engineering capability by 50%, this is a unique opportunity to play a pivotal role in shaping the future of their platforms. This is not just another developer role its a genuine career-defining moment to contribute to enterprise-scale SaaS products, solve complex engineering challenges, and help unlock the next phase of growth. Why apply? * Be part of a greenfield team within an already profitable enterprise. * Deliver next-generation SaaS solutions in a highly scalable cloud-first environment. * Work with cutting-edge technologies .NET 8, C# 14, Azure, React, SQL Server, Microservices, CI/CD pipelines.
        Our client, a highly profitable enterprise SaaS business at the very heart of industry innovation, is assembling a brand-new greenfield engineering team to drive a major technical transformation. With an ambitious target of uplifting senior engineering capability by 50%, this is a unique opportunity to play a pivotal role in shaping the future of their platforms. This is not just another developer role its a genuine career-defining moment to contribute to enterprise-scale SaaS products, solve complex engineering challenges, and help unlock the next phase of growth. Why apply? * Be part of a greenfield team within an already profitable enterprise. * Deliver next-generation SaaS solutions in a highly scalable cloud-first environment. * Work with cutting-edge technologies .NET 8, C# 14, Azure, React, SQL Server, Microservices, CI/CD pipelines.
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        Competitive salary dependent on skills and experience and potential for equity participation - Remote ideally commutable to Leeds and London when required - MUST BE BASED IN THE UK - Full Time - We are streamlining business development for dealmakers. About Us - We are on a mission to transform how deals get done. Backed by significant scale-up funding (7-figure+ GBP) and already validated by leading industry organisations, were building the AI-powered platform for modern dealmakers. Were a fast-growing, venture-backed start-up where ideas move quickly from concept to product. Our technology spans backend, frontend, data, and AI, giving our team real scope to shape the future of the product and the company itself. If youre excited by solving complex problems end-to-end, working in a collaborative environment, and having a tangible impact, youll feel at home here. The
        Competitive salary dependent on skills and experience and potential for equity participation - Remote ideally commutable to Leeds and London when required - MUST BE BASED IN THE UK - Full Time - We are streamlining business development for dealmakers. About Us - We are on a mission to transform how deals get done. Backed by significant scale-up funding (7-figure+ GBP) and already validated by leading industry organisations, were building the AI-powered platform for modern dealmakers. Were a fast-growing, venture-backed start-up where ideas move quickly from concept to product. Our technology spans backend, frontend, data, and AI, giving our team real scope to shape the future of the product and the company itself. If youre excited by solving complex problems end-to-end, working in a collaborative environment, and having a tangible impact, youll feel at home here. The
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        Mid-Senior PHP Developer

        Searchability (UK) Ltd
        BD1, Bradford
        £30000 - £45000 per annum
        PHP Developer * Join a growing, values driven agency in a position! * Fulltime onsite in Bradford, long term hybrid working available * Up to £45k, 35 hour working week, flexible start and finish, regular pay reviews, social events and much more! My client is a growing, values driven agency based in West Yorkshire. Currently 20 people strong, they boost an impression client rooster and have created a close-knit working environment. The founder is passionate about working on value lead projects, they will not take on anything that compromises their strict code of ethics, and as such have great satisfaction from the work that they do. The team is friendly, and ambitious. Micromanagement isn't welcome here, and everyone is rewarded on merit, with regular pay reviews, every 6 months or so. This is a technical key hire for them and will help to cement their excellent reput
        PHP Developer * Join a growing, values driven agency in a position! * Fulltime onsite in Bradford, long term hybrid working available * Up to £45k, 35 hour working week, flexible start and finish, regular pay reviews, social events and much more! My client is a growing, values driven agency based in West Yorkshire. Currently 20 people strong, they boost an impression client rooster and have created a close-knit working environment. The founder is passionate about working on value lead projects, they will not take on anything that compromises their strict code of ethics, and as such have great satisfaction from the work that they do. The team is friendly, and ambitious. Micromanagement isn't welcome here, and everyone is rewarded on merit, with regular pay reviews, every 6 months or so. This is a technical key hire for them and will help to cement their excellent reput
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        FEATURED

        SnapLogic Integration Analyst

        InterQuest Group (UK) Limited
        Manchester, Greater Manchester
        £50k - 55k per year + Bonus
        Job Opportunity: SnapLogic Integration Analyst - Location: Manchester Hybrid - Salary: Up to £55,000 + Bonus - About the Role - This genuine flagship organiation is seeking a skilled SnapLogic Integration Analyst to join their large and growing technology team. This is a fantastic opportunity for someone with expertise in integration platforms and data flows who is eager to make an impact by driving seamless connectivity across business systems. As their SnapLogic Integration Analyst, you will design, build, and maintain integrations across multiple platforms, ensuring robust, efficient, and scalable data flows that support business operations and decision-making. Key Responsibilities * Develop, configure, and maintain integrations using the SnapLogic Intelligent Integration Platform. * Collaborate with stakeholders to gather requirements and translate business needs
        Job Opportunity: SnapLogic Integration Analyst - Location: Manchester Hybrid - Salary: Up to £55,000 + Bonus - About the Role - This genuine flagship organiation is seeking a skilled SnapLogic Integration Analyst to join their large and growing technology team. This is a fantastic opportunity for someone with expertise in integration platforms and data flows who is eager to make an impact by driving seamless connectivity across business systems. As their SnapLogic Integration Analyst, you will design, build, and maintain integrations across multiple platforms, ensuring robust, efficient, and scalable data flows that support business operations and decision-making. Key Responsibilities * Develop, configure, and maintain integrations using the SnapLogic Intelligent Integration Platform. * Collaborate with stakeholders to gather requirements and translate business needs
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        C# Developer

        FORT SEARCH LTD
        M1, Manchester
        From £55,000 to £65,000 per annum
        Senior .NET Developer- Up to £65,000 - Were working with a growing technology business who are investing heavily in their engineering teams. They are now looking for a Senior .NET Developer to join their team and play a key role in building and supporting business-critical systems. What youll be doing * Designing and developing high-quality, scalable software solutions using the Microsoft stack * Building and maintaining APIs, services, and integrations * Working with databases and ensuring data-driven systems are efficient and reliable * Contributing to system improvements and helping modernise legacy applications * Collaborating with product managers, testers, and fellow engineers in an Agile environment * Supporting and mentoring other developers, and sharing best practices - What were looking for * Strong background in C# / .NET development (Framework and/or Core)
        Senior .NET Developer- Up to £65,000 - Were working with a growing technology business who are investing heavily in their engineering teams. They are now looking for a Senior .NET Developer to join their team and play a key role in building and supporting business-critical systems. What youll be doing * Designing and developing high-quality, scalable software solutions using the Microsoft stack * Building and maintaining APIs, services, and integrations * Working with databases and ensuring data-driven systems are efficient and reliable * Contributing to system improvements and helping modernise legacy applications * Collaborating with product managers, testers, and fellow engineers in an Agile environment * Supporting and mentoring other developers, and sharing best practices - What were looking for * Strong background in C# / .NET development (Framework and/or Core)
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        Software Developer

        FORT SEARCH LTD
        M1, Manchester
        From £40,000 to £60,000 per annum
        A growing technology business is looking for a Software Developer with experience in the Tridium Niagara Framework to join their team. This role will suit someone who enjoys working with Java, developing custom modules, and integrating systems into wider technology platforms. * Design, develop, and maintain software solutions within the Niagara Framework * Build and extend modules, drivers, and service components using Java * Integrate systems with APIs, microservices, and wider technology platforms * Contribute to innovation across new and existing projects in a collaborative team environment * Strong commercial experience in Java development * Hands-on experience with the Niagara Framework (Niagara 4 preferred) * Understanding of APIs, services, and modern development practices (Git, CI/CD, etc.) * Problem-solving mindset and a passion for developing new technologie
        A growing technology business is looking for a Software Developer with experience in the Tridium Niagara Framework to join their team. This role will suit someone who enjoys working with Java, developing custom modules, and integrating systems into wider technology platforms. * Design, develop, and maintain software solutions within the Niagara Framework * Build and extend modules, drivers, and service components using Java * Integrate systems with APIs, microservices, and wider technology platforms * Contribute to innovation across new and existing projects in a collaborative team environment * Strong commercial experience in Java development * Hands-on experience with the Niagara Framework (Niagara 4 preferred) * Understanding of APIs, services, and modern development practices (Git, CI/CD, etc.) * Problem-solving mindset and a passion for developing new technologie
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        My client, a dynamic and growing technology-led organisation, is seeking a skilled IT Support Engineer to lead the technical delivery of cloud-centric infrastructure projects across a diverse client base. This is a hands-on role focused on delivering scalable, secure, and efficient solutions using Microsoft Azure and modern networking technologies. * Deliver cloud infrastructure and transformation projects, primarily on Microsoft Azure. * Ensure projects meet cost, time, scope, and compliance targets. * Collaborate with support and delivery teams for smooth service transition. * Provide clear project updates and documentation. * Identify automation opportunities and process improvements using Azure-native tools. * Mentor junior team members and promote knowledge sharing. * Support strategic account planning and resource reporting.
        My client, a dynamic and growing technology-led organisation, is seeking a skilled IT Support Engineer to lead the technical delivery of cloud-centric infrastructure projects across a diverse client base. This is a hands-on role focused on delivering scalable, secure, and efficient solutions using Microsoft Azure and modern networking technologies. * Deliver cloud infrastructure and transformation projects, primarily on Microsoft Azure. * Ensure projects meet cost, time, scope, and compliance targets. * Collaborate with support and delivery teams for smooth service transition. * Provide clear project updates and documentation. * Identify automation opportunities and process improvements using Azure-native tools. * Mentor junior team members and promote knowledge sharing. * Support strategic account planning and resource reporting.
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        FEATURED
        C# Senior Software Developer - Greater Manchester - £50-65K - My client is a boutique firm based in Greater Manchester, operating in a regulated sector and offering innovative, tech-driven solutions. With a growing commitment to internal software development, they are seeking a talented Senior Software Developer to join their agile team and help shape the future of their platforms. Youll be a key contributor, working on full-stack applications using .NET, Angular, Docker, and AWS. This hands-on role combines technical leadership, product influence, and close collaboration with stakeholders-including senior leadership. * Design, develop, and maintain internal and client-facing applications using .NET and Angular * Build new features using modern tools like Docker and AWS ECS * Mentor and support a junior developer through code reviews and best practices
        C# Senior Software Developer - Greater Manchester - £50-65K - My client is a boutique firm based in Greater Manchester, operating in a regulated sector and offering innovative, tech-driven solutions. With a growing commitment to internal software development, they are seeking a talented Senior Software Developer to join their agile team and help shape the future of their platforms. Youll be a key contributor, working on full-stack applications using .NET, Angular, Docker, and AWS. This hands-on role combines technical leadership, product influence, and close collaboration with stakeholders-including senior leadership. * Design, develop, and maintain internal and client-facing applications using .NET and Angular * Build new features using modern tools like Docker and AWS ECS * Mentor and support a junior developer through code reviews and best practices
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        FEATURED

        Lead Technical Architect

        Department for Work and Pensions (DWP)
        M2, Manchester, M2 3AA
        From £72,664 to £99,836 per annum plus 28.97% pension contributions
        Microservice and API-led architecture and integration design tools, techniques and best practice.
        Microservice and API-led architecture and integration design tools, techniques and best practice.
        NEWPREMIUM
        This role is ideal for someone experienced in backend API development and working with modern data infrastructure. Your Expertise: Highly experienced Developer with experience of backend API development and working with modern data infrastructure. API development with Falcon framework
        This role is ideal for someone experienced in backend API development and working with modern data infrastructure. Your Expertise: Highly experienced Developer with experience of backend API development and working with modern data infrastructure. API development with Falcon framework
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        NEW
        This role is ideal for someone experienced in backend API development and working with modern data infrastructure. Your Expertise: Highly experienced Developer with experience of backend API development and working with modern data infrastructure. API development with Falcon framework
        This role is ideal for someone experienced in backend API development and working with modern data infrastructure. Your Expertise: Highly experienced Developer with experience of backend API development and working with modern data infrastructure. API development with Falcon framework
        more
        NEW
        London - 2025-08-26T00:00:00Z - 170103 - Vanguard - Location: London or Manchester (Hybrid) About Vanguard - Vanguard is an investment company unlike any other. It was founded by Jack Bogle in the US in 1975 on a simple but revolutionary idea: that an investment company should manage its funds solely in the interests of its clients. Jack helped bring investing to the masses with the index fund. Index funds do not pick individual shares or bonds to beat the market. They track the performance of the entire market. Or as Jack put it, "Don't look for the needle in the haystack. Just buy the haystack!". We have stood for low-cost, uncomplicated investing ever since. Over the last 45 years people have come round to our way of thinking and more than 50 million investors worldwide now trust us with their money. About the Role
        London - 2025-08-26T00:00:00Z - 170103 - Vanguard - Location: London or Manchester (Hybrid) About Vanguard - Vanguard is an investment company unlike any other. It was founded by Jack Bogle in the US in 1975 on a simple but revolutionary idea: that an investment company should manage its funds solely in the interests of its clients. Jack helped bring investing to the masses with the index fund. Index funds do not pick individual shares or bonds to beat the market. They track the performance of the entire market. Or as Jack put it, "Don't look for the needle in the haystack. Just buy the haystack!". We have stood for low-cost, uncomplicated investing ever since. Over the last 45 years people have come round to our way of thinking and more than 50 million investors worldwide now trust us with their money. About the Role
        more

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        Frequently Asked Questions

        How many permanent API jobs are there in Barnsley?
        There are 31 permanent API jobs within 20 miles of Barnsley available on CWJobs right now.

        What other similar jobs are there to permanent API jobs in Barnsley?
        As well as permanent API jobs in Barnsley, you can find permanent Aws, IT, Software Development, amongst many others.