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31 Permanent API jobs in Oxfordshire + 20 miles
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Are you an experienced .Net (C#) Developer, with some solid experience in API development, looking to take on your next Software Engineering role in a growing SaaS product company? Keen to grow your technical skills around .Net 8 / C# / API & MySQL development & look into new Generative AI / LLM dev' tools, too? Job title: .Net (C#) API Developer - But basically, if you have solid experience in .Net (C#) & solid experience in ASP.Net core WebAPI (RESTful API), then we'd like to hear from you! - ASP.NET Core MVC and Web API. - Understanding of API versioning, documentation (e.g., Swagger), and security best practices.
Are you an experienced .Net (C#) Developer, with some solid experience in API development, looking to take on your next Software Engineering role in a growing SaaS product company? Keen to grow your technical skills around .Net 8 / C# / API & MySQL development & look into new Generative AI / LLM dev' tools, too? Job title: .Net (C#) API Developer - But basically, if you have solid experience in .Net (C#) & solid experience in ASP.Net core WebAPI (RESTful API), then we'd like to hear from you! - ASP.NET Core MVC and Web API. - Understanding of API versioning, documentation (e.g., Swagger), and security best practices.
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Senior .NET Integration Developer
Senior .NET Integration Developer
Oscar Associates (UK) Limited
SL6, Maidenhead
£50000 - £65000 per annum
Assist customers and partners in integration setup and API/gateway usage.
Assist customers and partners in integration setup and API/gateway usage.
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Deep understanding of RESTful API design and integration
Deep understanding of RESTful API design and integration
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Applications Support Analyst
Applications Support Analyst
Kudos Partners
Datchet Common, SL3
£70,000 per annum plus 12% bonus - generous benefits package
API support and monitoring tools (e.g., SolarWinds, Azure App Insights)
API support and monitoring tools (e.g., SolarWinds, Azure App Insights)
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Systems Integration Architect - Oracle Fusion & Oracle Cloud
Systems Integration Architect - Oracle Fusion & Oracle Cloud
EFCI Group Ltd
OX4, Oxford
From £80,000 to £100,000 per annum
System and Integration Architect Oracle Fusion & Oracle Cloud - Location:Oxford - Reports to:Head of Application Integration Services - Effective Date:ASAP - This leading Institute is reimagining how science and technology can solve global challenges in health, food security, climate change, and advanced automation/AI. Join a team of experts transforming pioneering science into commercial products for global benefit and long-term sustainability. The institute encourages collaboration, innovation, and perseverance. ASystem and Integration Architectwith deep expertise in Oracle Fusion Applications and Oracle Cloud technologies is sought. This is a key leadership role responsible for defining the architecture and governance of enterprise-wide integrations across Oracle SaaS, PaaS, within the Technology Department.
System and Integration Architect Oracle Fusion & Oracle Cloud - Location:Oxford - Reports to:Head of Application Integration Services - Effective Date:ASAP - This leading Institute is reimagining how science and technology can solve global challenges in health, food security, climate change, and advanced automation/AI. Join a team of experts transforming pioneering science into commercial products for global benefit and long-term sustainability. The institute encourages collaboration, innovation, and perseverance. ASystem and Integration Architectwith deep expertise in Oracle Fusion Applications and Oracle Cloud technologies is sought. This is a key leadership role responsible for defining the architecture and governance of enterprise-wide integrations across Oracle SaaS, PaaS, within the Technology Department.
Software API Developer - Hybrid - Salary £50k (DOE) * Experienced with ASP.NET Core MVC and Web API * Understanding of API versioning documentation (e.g. Swagger)
Software API Developer - Hybrid - Salary £50k (DOE) * Experienced with ASP.NET Core MVC and Web API * Understanding of API versioning documentation (e.g. Swagger)
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Strong background in API development, cloud adoption frameworks, and modern architectures.
Strong background in API development, cloud adoption frameworks, and modern architectures.
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Data Integration Engineer
Data Integration Engineer
Anson Mccade
Basingstoke, Hampshire
GBP 700.00 per week;GBP 70,000.00 per year;GBP 85,000.00 per year
Strong understanding of API design and integration techniques (REST, Webhooks, GraphQL).
Strong understanding of API design and integration techniques (REST, Webhooks, GraphQL).
PREMIUM
Are you a hands-on Lead or Senior .Net Developer ready to shape architecture and guide talented developers? Want a hybrid role with 3 days WFH? This is your chance to stay close to the code while making key technical decisions that drive real business impact. You'll join a collaborative, forward-thinking team building cutting-edge products — with the support, tools, and flexibility to thrive. Role: Lead Software Developer, Senior .Net Developer, Software Engineering Manager, Senior Full Stack Developer, Lead .Net Developer, Lead Software Engineer, Senior C# Developer - Salary: £65k - £75k base + Bonus - Benefits: 5% pension, 25 days holiday, 2 wellbeing days, Christmas shutdown, private healthcare, life assurance, cinema tickets & more - Location: Milton Keynes – Hybrid (2 days a week in office) If you’ve got strong .Net (C#) experience and skills in GitHub, APIs, Pos
Are you a hands-on Lead or Senior .Net Developer ready to shape architecture and guide talented developers? Want a hybrid role with 3 days WFH? This is your chance to stay close to the code while making key technical decisions that drive real business impact. You'll join a collaborative, forward-thinking team building cutting-edge products — with the support, tools, and flexibility to thrive. Role: Lead Software Developer, Senior .Net Developer, Software Engineering Manager, Senior Full Stack Developer, Lead .Net Developer, Lead Software Engineer, Senior C# Developer - Salary: £65k - £75k base + Bonus - Benefits: 5% pension, 25 days holiday, 2 wellbeing days, Christmas shutdown, private healthcare, life assurance, cinema tickets & more - Location: Milton Keynes – Hybrid (2 days a week in office) If you’ve got strong .Net (C#) experience and skills in GitHub, APIs, Pos
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Job Title: Solution Architect - Location: Windsor, UK - Work Model: Hybrid (1 day per week in office) Job Type: Contract (Inside IR35) Duration: 6 Months - We are seeking an experienced Solution Architect to join our team in Windsor. You will play a key role in defining, communicating, and implementing strategic technology standards and roadmaps, ensuring robust and scalable solutions for business transformation initiatives. This is a hybrid role requiring one day per week in the office. * Identify, publish, and communicate strategic technology standards, frameworks, principles, and roadmaps to guide technology decisions and leverage efficiency opportunities. * Analyze the impact of implementing new technologies into the IT infrastructure. * Assist Solution Architects, Product Specialists, and Project Managers in matching technology services to specific business servi
Job Title: Solution Architect - Location: Windsor, UK - Work Model: Hybrid (1 day per week in office) Job Type: Contract (Inside IR35) Duration: 6 Months - We are seeking an experienced Solution Architect to join our team in Windsor. You will play a key role in defining, communicating, and implementing strategic technology standards and roadmaps, ensuring robust and scalable solutions for business transformation initiatives. This is a hybrid role requiring one day per week in the office. * Identify, publish, and communicate strategic technology standards, frameworks, principles, and roadmaps to guide technology decisions and leverage efficiency opportunities. * Analyze the impact of implementing new technologies into the IT infrastructure. * Assist Solution Architects, Product Specialists, and Project Managers in matching technology services to specific business servi
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Full Stack Software Engineer - AI Innovation
Full Stack Software Engineer - AI Innovation
Connexa
MK1, Milton Keynes
£60000 - £70000 per annum + 20% Bonus
Our client, a growing consultancy delivering cutting-edge AI and data-led services to government and public sector clients, is looking for a Full Stack Software Engineer to join their forward-thinking team in Milton Keynes. This is a fantastic opportunity to contribute to a nationally recognised AI innovation platform used to drive sensitive data discovery, redaction, and secure archiving for government departments. You'll work across a modern tech stack and play a key role in the development, deployment, and support of a secure full stack system used across the UK public sector. * Design, build, and test full stack software in a secure, client-focused environment * Work with modern front-end technologies (React, TypeScript, HTML/CSS) to deliver intuitive UI/UX * Develop robust back-end services using Java and Spring Boot
Our client, a growing consultancy delivering cutting-edge AI and data-led services to government and public sector clients, is looking for a Full Stack Software Engineer to join their forward-thinking team in Milton Keynes. This is a fantastic opportunity to contribute to a nationally recognised AI innovation platform used to drive sensitive data discovery, redaction, and secure archiving for government departments. You'll work across a modern tech stack and play a key role in the development, deployment, and support of a secure full stack system used across the UK public sector. * Design, build, and test full stack software in a secure, client-focused environment * Work with modern front-end technologies (React, TypeScript, HTML/CSS) to deliver intuitive UI/UX * Develop robust back-end services using Java and Spring Boot
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Job Title: Salesforce Vlocity Developer - Location: Windsor, UK - Work Mode (Mandatory): Hybrid (visit to office once every week) to begin with - Job Purpose and Primary Objectives - Salesforce Vlocity development for a major business unit - Key Responsibilities * Design and develop custom Vlocity solutions on top of the Salesforce platform, including CPQ, CLM, and OmniStudio. * Work with the design and product teams to translate product requirements into technical specifications. * Build and maintain Vlocity data models, including objects, fields, and relationships. * Develop custom Apex classes, triggers, and Visualforce pages to extend the functionality of the Salesforce platform. * Implement Vlocity integration with external systems using REST and SOAP APIs. * Collaborate with other developers and the operations team to ensure the quality of the codebase and the t
Job Title: Salesforce Vlocity Developer - Location: Windsor, UK - Work Mode (Mandatory): Hybrid (visit to office once every week) to begin with - Job Purpose and Primary Objectives - Salesforce Vlocity development for a major business unit - Key Responsibilities * Design and develop custom Vlocity solutions on top of the Salesforce platform, including CPQ, CLM, and OmniStudio. * Work with the design and product teams to translate product requirements into technical specifications. * Build and maintain Vlocity data models, including objects, fields, and relationships. * Develop custom Apex classes, triggers, and Visualforce pages to extend the functionality of the Salesforce platform. * Implement Vlocity integration with external systems using REST and SOAP APIs. * Collaborate with other developers and the operations team to ensure the quality of the codebase and the t
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Halian Technology are searching for aLead Android Engineerto join our clients forward-thinking mobile team. Our client isone of the UKs most trusted and innovative omni-channel retailers, where technology and customer experience go hand in hand. If youre passionate about delivering high-quality mobile experiences and want to work with modern tools, great people, and at a company where learning and development are core valuesthis is the role for you. * Influence architecture and development strategy within a high-performing Agile squad. * Provide technical assurance and guidance across complex, high-impact projects. * Collaborate cross-functionally with iOS Engineers, BAs, QAs, Designers, and UX Specialists. * Champion Android best practices including Accessibility, CI/CD, TDD, and clean architecture.
Halian Technology are searching for aLead Android Engineerto join our clients forward-thinking mobile team. Our client isone of the UKs most trusted and innovative omni-channel retailers, where technology and customer experience go hand in hand. If youre passionate about delivering high-quality mobile experiences and want to work with modern tools, great people, and at a company where learning and development are core valuesthis is the role for you. * Influence architecture and development strategy within a high-performing Agile squad. * Provide technical assurance and guidance across complex, high-impact projects. * Collaborate cross-functionally with iOS Engineers, BAs, QAs, Designers, and UX Specialists. * Champion Android best practices including Accessibility, CI/CD, TDD, and clean architecture.
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Halian Technology are searching for aLead Android Engineerto join our clients forward-thinking mobile team. Our client isone of the UKs most trusted and innovative omni-channel retailers, where technology and customer experience go hand in hand. If youre passionate about delivering high-quality mobile experiences and want to work with modern tools, great people, and at a company where learning and development are core valuesthis is the role for you. * Influence architecture and development strategy within a high-performing Agile squad. * Provide technical assurance and guidance across complex, high-impact projects. * Collaborate cross-functionally with iOS Engineers, BAs, QAs, Designers, and UX Specialists. * Champion Android best practices including Accessibility, CI/CD, TDD, and clean architecture.
Halian Technology are searching for aLead Android Engineerto join our clients forward-thinking mobile team. Our client isone of the UKs most trusted and innovative omni-channel retailers, where technology and customer experience go hand in hand. If youre passionate about delivering high-quality mobile experiences and want to work with modern tools, great people, and at a company where learning and development are core valuesthis is the role for you. * Influence architecture and development strategy within a high-performing Agile squad. * Provide technical assurance and guidance across complex, high-impact projects. * Collaborate cross-functionally with iOS Engineers, BAs, QAs, Designers, and UX Specialists. * Champion Android best practices including Accessibility, CI/CD, TDD, and clean architecture.
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Salary: £28,000 - £30,000 per annum - Location: Northamptonshire (commutable from Northampton, Milton Keynes, Daventry, Wellingborough, Brackley, Banbury and surrounding areas) Hours: 9am - 5pm, Monday to Friday - The Opportunity - A fast-growing and award-winning technology business is looking for a Graduate Web Developer to join its expanding development team. This is a fantastic opportunity to kickstart your career in web development, working on WordPress-based projects and gaining exposure to the latest technologies in a collaborative and supportive environment. Working Arrangements * First 6 months: 5 days per week onsite (office-based) for training, mentoring, and team integration * After 6 months: Transition to a hybrid model with 2 days working from home each week - What You'll Be Doing * Building new and maintaining existing customer websites with a focus on
Salary: £28,000 - £30,000 per annum - Location: Northamptonshire (commutable from Northampton, Milton Keynes, Daventry, Wellingborough, Brackley, Banbury and surrounding areas) Hours: 9am - 5pm, Monday to Friday - The Opportunity - A fast-growing and award-winning technology business is looking for a Graduate Web Developer to join its expanding development team. This is a fantastic opportunity to kickstart your career in web development, working on WordPress-based projects and gaining exposure to the latest technologies in a collaborative and supportive environment. Working Arrangements * First 6 months: 5 days per week onsite (office-based) for training, mentoring, and team integration * After 6 months: Transition to a hybrid model with 2 days working from home each week - What You'll Be Doing * Building new and maintaining existing customer websites with a focus on
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Front End Games Developer - Hybrid Remote
Front End Games Developer - Hybrid Remote
VERTECH GROUP (UK) LTD
OX4, Oxford
From £55,000 to £75,000 per annum + Bonus + Benefits
Front End Game Developer - Location:Home Based / 1 day per week in Oxford - Salary:Circa 55K 75K + Bonus + Benefits - Senior Front End Games Developerrequired by fast-growing, Top Tech Company! This is a diverse, challenging role in a talented team where youll be building cutting-edge casino slot games, driving feature development, shaping the architecture, and mentoring junior developers * At least 5yrs development experience * Games development experience * Mobile-first mindset * HTML5, TypeScript * PixiJS, Phaser or similar * WebGL or Canvas 2D APIs * Git or similar * Maths, statistics, or physics background * 3D development experience - Tremendous opportunity offering plenty of scope for career progression in a friendly, innovative environment where youll be able to bring ideas, keep up-to-date with the latest technologies and enjoy a healthy work/life balance!
Front End Game Developer - Location:Home Based / 1 day per week in Oxford - Salary:Circa 55K 75K + Bonus + Benefits - Senior Front End Games Developerrequired by fast-growing, Top Tech Company! This is a diverse, challenging role in a talented team where youll be building cutting-edge casino slot games, driving feature development, shaping the architecture, and mentoring junior developers * At least 5yrs development experience * Games development experience * Mobile-first mindset * HTML5, TypeScript * PixiJS, Phaser or similar * WebGL or Canvas 2D APIs * Git or similar * Maths, statistics, or physics background * 3D development experience - Tremendous opportunity offering plenty of scope for career progression in a friendly, innovative environment where youll be able to bring ideas, keep up-to-date with the latest technologies and enjoy a healthy work/life balance!
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Senior Full Stack C# .Net Developer - Hybrid Remote
Senior Full Stack C# .Net Developer - Hybrid Remote
VERTECH GROUP (UK) LTD
OX4, Oxford
From £70,000 to £85,000 per annum + Bonus + Benefits
Senior Full Stack C# .Net Developer - Location:Home based / 1 day per month in Oxford - Salary:Circa 70K 85K DOE + Benefits - Senior Full Stack C# .Net Developerrequired by a well-established and fast-growing Top Tech company! This is a varied, challenging role building mission-critical, user-facing applications used at scale. Youll be developing new features, contribute to key technical decisions, and helping to shape the quality of code across the team * At least 5yrs development experience * Experience with high-traffic, responsive apps and sites * Expertise in C# .Net Core * RESTful APIs * TypeScript &JavaScript * Frameworks: Angular, Vue, or React * HTML5 and CSS3 * Familiarity with CI/CD tools * Version control: Git or similar * SQL Server & MySQL - Tremendous opportunity offering plenty of scope for career progression in a friendly, innovative environment where
Senior Full Stack C# .Net Developer - Location:Home based / 1 day per month in Oxford - Salary:Circa 70K 85K DOE + Benefits - Senior Full Stack C# .Net Developerrequired by a well-established and fast-growing Top Tech company! This is a varied, challenging role building mission-critical, user-facing applications used at scale. Youll be developing new features, contribute to key technical decisions, and helping to shape the quality of code across the team * At least 5yrs development experience * Experience with high-traffic, responsive apps and sites * Expertise in C# .Net Core * RESTful APIs * TypeScript &JavaScript * Frameworks: Angular, Vue, or React * HTML5 and CSS3 * Familiarity with CI/CD tools * Version control: Git or similar * SQL Server & MySQL - Tremendous opportunity offering plenty of scope for career progression in a friendly, innovative environment where
FEATURED
We're currently working with a growing SaaS company based in Banbury that are looking for a Senior Software Engineer skilled with C# ASP.NET, Angular, and SQL. This role will naturally grow in to a Lead Engineer position as the team grows. You will be working to develop and build their new payroll project, which will be rolling out nationally, and then internationally. This role is based in Banbury, and it will require you to be onsite a minimum of two days per week. * Professional software engineering experience (typically 5+ years) using C# / ASP.NET (Core & Framework) and modern JavaScript/TypeScript frameworks, particularly Angular (v8+). * Significant understanding and practical experience with relational databases (MySQL /PostgreSQL preferred). * Expertise in version control systems (Git) and branching strategies (Gitflow).
We're currently working with a growing SaaS company based in Banbury that are looking for a Senior Software Engineer skilled with C# ASP.NET, Angular, and SQL. This role will naturally grow in to a Lead Engineer position as the team grows. You will be working to develop and build their new payroll project, which will be rolling out nationally, and then internationally. This role is based in Banbury, and it will require you to be onsite a minimum of two days per week. * Professional software engineering experience (typically 5+ years) using C# / ASP.NET (Core & Framework) and modern JavaScript/TypeScript frameworks, particularly Angular (v8+). * Significant understanding and practical experience with relational databases (MySQL /PostgreSQL preferred). * Expertise in version control systems (Git) and branching strategies (Gitflow).
FEATURED
Proficient in API design, development & production operation
Proficient in API design, development & production operation
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Knowledge of FTP/SFTP, SSL Certificates, REST API, SOAP, Postman, SoapUI.
Knowledge of FTP/SFTP, SSL Certificates, REST API, SOAP, Postman, SoapUI.
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Skills C#, .NET .NETCore, C#, ASP .NET, Typescript, JavaScript, MVC, SQL Server, AGILE, Angular, React, Software Developer, Software engineer, Graduate Developer, Web applications, API, CMS, Umbraco, Sitefinity
Skills C#, .NET .NETCore, C#, ASP .NET, Typescript, JavaScript, MVC, SQL Server, AGILE, Angular, React, Software Developer, Software engineer, Graduate Developer, Web applications, API, CMS, Umbraco, Sitefinity
Proficiency in API testing (Postman or equivalent) and SQL for data validation.
Proficiency in API testing (Postman or equivalent) and SQL for data validation.
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Conduct API testing using tools like Postman and validate data integrity through SQL queries. * Proficiency in API testing (Postman or equivalent) and SQL for data validation.
Conduct API testing using tools like Postman and validate data integrity through SQL queries. * Proficiency in API testing (Postman or equivalent) and SQL for data validation.
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Contribute to backend/API testing and support security testing initiatives. * Strong knowledge of API testing and backend validation.
Contribute to backend/API testing and support security testing initiatives. * Strong knowledge of API testing and backend validation.
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We are seeking a proactive and customer-focused Service Desk Analyst to join our Service Management team. In this role, you will deliver prompt and professional solutions for customer requests and be the first point of contact for our internal and external users, providing essential technical support. You will receive, triage, and resolve a wide range of IT-related incidents and service requests, ensuring a smooth and efficient user experience. Your ability to communicate effectively, diagnose issues, and escalate appropriately will be crucial to your success. Provide first-line support to users, attempting to resolve issues at Level 1. Diagnose and troubleshoot hardware, software, and network issues. Escalate complex incidents to Level 2 and 3 support teams, providing detailed information. Track and monitor incidents, ensuring timely resolution and communication with
We are seeking a proactive and customer-focused Service Desk Analyst to join our Service Management team. In this role, you will deliver prompt and professional solutions for customer requests and be the first point of contact for our internal and external users, providing essential technical support. You will receive, triage, and resolve a wide range of IT-related incidents and service requests, ensuring a smooth and efficient user experience. Your ability to communicate effectively, diagnose issues, and escalate appropriately will be crucial to your success. Provide first-line support to users, attempting to resolve issues at Level 1. Diagnose and troubleshoot hardware, software, and network issues. Escalate complex incidents to Level 2 and 3 support teams, providing detailed information. Track and monitor incidents, ensuring timely resolution and communication with
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