1,146 Api Integration jobs in the United Kingdom

Responsibilities and Duties:

• API Solution Design & Development
• Architect and implement secure, scalable RESTful APIs to integrate Employment Hero with external platforms.
• Implement OAuth 2.0 and token-based authentication for API access.
• Manage the API lifecycle including testing, deployment, version control, logging, and monitoring.
• Use Python (e.g. FastAPI) and Azure services (e.g. Azure Functions, Microsoft Fabric pipelines) for development and orchestration.
• Document integration specifications and processes clearly for future maintenance and support.

Collaboration & Client Integration Support:

• Liaise with third-party vendors and client IT teams to align technical details.
• Work closely with Technoivity consultants to align API designs with functional requirements.
• Participate in workshops, contribute technical insight, and support user acceptance testing.
• Deliver training, handover materials, and ongoing technical documentation.
• Share best practices and contribute to continuous improvement.

About you:

• Experienced in developing RESTful APIs and implementing OAuth 2.0 authentication.
• Skilled in Python (preferably FastAPI), Git, SQL, and cloud services like Microsoft Azure.
• Familiar with technologies such as: Airbyte, Rivery and Hevo
• Familiar with HR, Payroll, Recruitment, and L&D terminology and workflows.
• Able to work independently and as part of a team in a remote environment.
• Strong communicator, proactive problem-solver, and agile project contributor.

Responsibilities and Duties:

• API Solution Design & Development
• Architect and implement secure, scalable RESTful APIs to integrate Employment Hero with external platforms.
• Implement OAuth 2.0 and token-based authentication for API access.
• Manage the API lifecycle including testing, deployment, version control, logging, and monitoring.
• Use Python (e.g. FastAPI) and Azure services (e.g. Azure Functions, Microsoft Fabric pipelines) for development and orchestration.
• Document integration specifications and processes clearly for future maintenance and support.

Collaboration & Client Integration Support:

• Liaise with third-party vendors and client IT teams to align technical details.
• Work closely with Technoivity consultants to align API designs with functional requirements.
• Participate in workshops, contribute technical insight, and support user acceptance testing.
• Deliver training, handover materials, and ongoing technical documentation.
• Share best practices and contribute to continuous improvement.

About you:

• Experienced in developing RESTful APIs and implementing OAuth 2.0 authentication.
• Skilled in Python (preferably FastAPI), Git, SQL, and cloud services like Microsoft Azure.
• Familiar with technologies such as: Airbyte, Rivery and Hevo
• Familiar with HR, Payroll, Recruitment, and L&D terminology and workflows.
• Able to work independently and as part of a team in a remote environment.
• Strong communicator, proactive problem-solver, and agile project contributor.

About the Job:
In this contract role, you will design, develop, deploy, and document secure and functional APIs that integrate Employment Hero's HR and Payroll modules with third-party client platforms (such as timesheet and finance systems). You'll work day-to-day with our clients and partners, acting as the technical expert who architects API solutions based on client requirements and Employment Hero's documentation. You will manage the full API lifecycle, liaise with third-party vendors, contribute to solution design workshops, and ensure the integration meets performance, security, and
documentation standards. Your work will make a direct impact by enabling clients to use automated HR and Payroll processes efficiently.

Responsibilities and Duties:

• API Solution Design & Development
• Architect and implement secure, scalable RESTful APIs to integrate Employment Hero with external platforms
• Implement OAuth 2.0 and token-based authentication for API access.
• Manage the API lifecycle including testing, deployment, version control, logging, and monitoring.
• Use Python (e.g. FastAPI) and Azure services (e.g. Azure Functions, Microsoft Fabric pipelines) for development and orchestration.
• Document integration specifications and processes clearly for future maintenance and support.

Collaboration & Client Integration Support:

• Liaise with third-party vendors and client IT teams to align technical details.
• Work closely with Technoivity consultants to align API designs with functional requirements.
• Participate in workshops, contribute technical insight, and support user acceptance testing
• Deliver training, handover materials, and ongoing technical documentation.Share best practices and contribute to continuous improvement.

About you:

• Experienced in developing RESTful APIs and implementing OAuth 2.0 authentication.
• Skilled in Python (preferably FastAPI), Git, SQL, and cloud services like Microsoft Azure.
• Familiar with technologies such as: Airbyte, Rivery and Hevo
• Familiar with HR, Payroll, Recruitment, and L&D terminology and workflows.
• Able to work independently and as part of a team in a remote environment.
• Strong communicator, proactive problem-solver, and agile project contributor.

Fully Remote

Outside IR35

Please send CV's to (url removed)

Are you passionate about emerging technology and innovation? The Betway / Jackpot City Graduate Software Engineering Program offers the perfect opportunity to apply your technical skills within the dynamic world of sports betting and iGaming. Create cutting-edge solutions that drive the future of gaming and deliver real business impact.

What You’ll Do:

• Write, debug and maintain high-quality code
• Collaborate with Product Managers and Engineers to design and deliver impactful features
• Work alongside Agile teams to create innovative solutions for a global audience

What You’ll Bring

• A degree in BSc Computer Science, Information Technology, or a related field
• Strong analytical problem-solving skills with a passion for technological innovation

• A passion for sports and a commitment to driving meaningful change through technology

  We’re home to a community of talented, forward-thinking teams powering Betway and Jackpot City. With a strong presence across rugby, cricket, football, Formula 1 and beyond, our platforms deliver unforgettable experiences to millions of players globally. Join a company that champions talent, nurtures fresh ideas, and offers infinite opportunity for growth and development.
  

We're looking for a Senior-level Software Engineer with strong JavaScript/TypeScript skills and experience across modern web stacks. You'll be instrumental in our transition away from Drupal as we modernise and scale our platform.

Tech Stack:

• Strong experience with JavaScript and TypeScript
• Good experience with Laravel and/or Python (Django or Flask a plus)
• Familiarity with Drupal and some knowledge of modern front-end frameworks (React, Vue, etc.)

What You'll Do:

• Build scalable applications using modern frameworks and clean architecture
• Contribute to backend services and APIs (Python or Laravel-based)
• Help re-platform and migrate from Drupal to a modern stack
• Collaborate cross-functionally with UX, Product, and DevOps

What We Offer:

• A supportive environment that encourages professional growth and continuous learning.
• An inclusive, collaborative culture within one of the UK's leading business services providers.
• A competitive salary and benefits package.

INDLON

49904MS

Software Engineer C#

12 month contract

Based in Stevenage

Offering 65ph Inside IR35

Do you have experience with C#?

Do you have experience across the lifecycle?

Do you want to work with an industry-leading company?

If your answer to these is yes, then this could be the role for you!

As the Software Engineer C#, you will be working alongside a market-leading Defence and Aerospace company who are constantly growing and developing. They are always looking to bring on new talents such as yourself and further develop your skills to enable you to grow within the company and industry.

You will be involved in:

• Supporting the development of advanced defence systems from the initial concept all the way through to in-service support and training
• Working with Project Leads and Simulation Architects to design and develop simulation components as an end-to-end representation of a Weapon System
• Part of an agile development team, made up of mixed discipline engineers working in synergy to develop simulations and representations of real equipment

Your skillset may include:

• Proficient in C# / C++
• Microsoft Visual Studio, Eclipse
• Ability to work from high level/system view into technical detail
• Knowledge of using Microsoft Windows and Linux operating systems
• Distributed simulation standards / Protocols (DIS, HLA, DDS) and web services development (JavaScript, Node JS or similar) Military Communications,
• Datalinks and Interfaces such as 1553/1760 and Ethernet TCP/IP
• Practical knowledge of System integration principles and processes

If this all sounds like something you will be interested in then simply apply and we can discuss the opportunity further!

Software Engineer C#

12 month contract

Based in Stevenage

Offering 65ph Inside IR35

Disclaimer:

This vacancy is being advertised by either Advanced Resource Managers Limited, Advanced Resource Managers IT Limited or Advanced Resource Managers Engineering Limited ("ARM"). ARM is a specialist talent acquisition and management consultancy. We provide technical contingency recruitment and a portfolio of more complex resource solutions. Our specialist recruitment divisions cover the entire technical arena, including some of the most economically and strategically important industries in the UK and the world today. We will never send your CV without your permission. Where the role is marked as Outside IR35 in the advertisement this is subject to receipt of a final Status Determination Statement from the end Client and may be subject to change.

Software Engineer C++

12 month contract

Based in Stevenage

Offering 67ph Inside IR35

Do you have experience with C++?

Do you have experience working in Linux environments?

Do you want to work with an industry-leading company?

If your answer to these is yes, then this could be the role for you!

As the Software Engineer C++, you will be working alongside a market-leading Defence and Aerospace company who are constantly growing and developing. They are always looking to bring on new talents such as yourself and further develop your skills to enable you to grow within the company and industry.

You will be involved in:

• Design and develop real-time test and capture software on Linux systems using C++
• Integrate and interface with high-speed SFPDP cards across multi-channel data pipelines
• Architect and implement robust, scalable, and maintainable multi-threaded applications
• Define and implement data sequencing and synchronisation logic to support deterministic capture and replay
• Work with hardware teams to ensure seamless integration and timing alignment between software and capture cards
• Lead and contribute to system integration, verification, and testing at both component and system levels
• Conduct performance analysis, debugging, and optimisation of real-time systems
• Document architecture, interface definitions, and test procedures to support handover and formal test activities

Your skillset may include:

• Experience in C++ development in a Linux environment
• Proficiency in C# for tooling, test interfaces, or Windows components
• Proven experience working with real-time data systems, preferably involving SFPDP or other high-speed digital protocols
• Demonstrable skills in multi-threaded and concurrent programming
• Experience with low-level I/O, DMA, or driver-level interactions with PCIe cards or similar
• Familiarity with software sequencing frameworks or custom state machines for test execution
• Experience with version control systems (e.g., Git) and CI/CD pipelines
• Knowledge of FPGA-based data acquisition systems and synchronisation methods
• Familiarity with unit testing frameworks, automated test rigs, or hardware-in-the-loop (HWIL) setups
• Experience developing or integrating with real-time operating systems (RTOS) or using real-time Linux extensions

If this all sounds like something you will be interested in then simply apply and we can discuss the opportunity further!

Software Engineer C++

12 month contract

Based in Stevenage

Offering 67ph Inside IR35

Disclaimer:

This vacancy is being advertised by either Advanced Resource Managers Limited, Advanced Resource Managers IT Limited or Advanced Resource Managers Engineering Limited ("ARM"). ARM is a specialist talent acquisition and management consultancy. We provide technical contingency recruitment and a portfolio of more complex resource solutions. Our specialist recruitment divisions cover the entire technical arena, including some of the most economically and strategically important industries in the UK and the world today. We will never send your CV without your permission. Where the role is marked as Outside IR35 in the advertisement this is subject to receipt of a final Status Determination Statement from the end Client and may be subject to change.

As an Innovations engineer you will be developing software-based solutions to business problems in a small team of full-stack software engineers. These solutions will be aimed at ensuring TUV SUD is well placed to deliver future services in a timely, efficient and competitive manner. You will be developing tools that will be used internally to support the business as we push to digitize and automate our internal processes. As part of the Innovations Team, you will liaise with various parts of the business to provide new and innovative software solutions for internal company usage. You will be expected to input on software requirements, software implementation and propose effective solutions.

Where the vacancy is filled from within TUV SUD, a handover period will be required to allow for training and delegation of current responsibilities.

Duties and Responsibilities:

• Writing C#/.NET software to automate manual processes and help improve efficiencies across the business.
• Functioning as a full-stack developer, working within a small team that is delivering both front-end and back-end software.
• Contributing to the design of Innovations projects.
• Participating in and contributing to Innovations practices such as Agile ceremonies and trainings.
• Automation of data collection, analysis and reporting using databases (SQL).
• Upgrading and improvement of legacy tools.
• Code sharing within the Innovations Team to speed up development process.
• Training for Service Line employees in areas where new software tools have been deployed by the Innovations team.
• Produce and prove solutions in concept with working prototypes.
• Provide regular updates on project progress.
• Track project progress using DevOps.

Essential Criteria:

• HND (or higher) or equivalent in Engineering or equivalent experience.
• Demonstrable professional experience in software engineering.
• Proficient in C# and .NET.
• Experience with HTML and CSS.
• Experience with SQL, preferably T-SQL.
• Experience with both front-end and back-end development.
• Experience with a web development framework, preferably Blazor.
• Ability to develop a working software solution in a team environment from concept to finished product.
• Team player, maintaining a high level of accuracy and attention to detail, good communication skills at all levels.
• Self-motivated with a desire to learn new skills and make a business impact.

Desirable Criteria:

• SQL Server experience, preferably using stored procedures.
• Experience using Azure DevOps in an Agile team.
• Experience running Agile ceremonies.
• Experience with Refit and Insight.Database.
• Strong communication skills and ability to communicate technical problems and potential solutions clearly to non-technical staff.

Further Information

TV SD in the UK offers a competitive salary and benefits package that includes a minimum of 33 days holiday entitlement (for full-time employees, including public holidays), a contributory Group Personal Pension Plan and a non-contributory Group Life Assurance Scheme. We also offer various Salary Exchange/Sacrifice schemes (buying/selling holiday, cycle to work scheme, pensions), incentive schemes and comprehensive wellbeing support (Employee Assistance Programme, Dental Scheme and Occupational Health services). Dependent on their role, employees may also be eligible for hybrid/permanent homeworking, a Company Car/Car Allowance and Private Medical Insurance.

Software Engineer - Node.js, TypeScript, AWS, Next.js

Location: Bracknell (Hybrid)

Salary: 50k to 55k DOE

The Role

Join a digital signage company serving thousands of displays nationwide. You'll architect and maintain a platform whilst building applications from weather widgets to interactive wayfinders, and handle everything from AWS infrastructure to client deployments.

What You'll Do

• Build & Architect: Core platform, weather/social/financial apps, interactive displays
• DevOps: AWS serverless management, legacy server maintenance, deployment pipelines
• Incident Response: Monitor threats, scale infrastructure, deploy critical fixes
• Client Support: Diagnose complex issues, translate requirements into technical solutions

Technical Skills

• Node.js, TypeScript, React, Next.js
• PostgreSQL, DynamoDB, RESTful APIs
• AWS (serverless architecture, infrastructure management)
• DevOps practices, CI/CD
• Backend development and systems architecture

What's In It For You

• Impact: Your code runs on displays across the UK
• Variety: From building new apps to handling 25x traffic spikes
• Growth: Clear path to technical leadership
• Team: Small, collaborative environment where decisions matter
• Tech: Modern stack with real-world scalability challenges
• 50k - 55k DOE | Hybrid Working | Bracknell

Ready to build software that actually gets seen? Get in touch with Mike Walton at Avanti Recruitment.

Avanti Recruitment is working exclusively with this digital signage software company on this position.