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38 Permanent API jobs in Meadow Green, Welwyn Garden City + 20 miles
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We are delighted to be partnering with a successful technology consultancy that is expanding its Software Development team. This is an excellent opportunity for a proactive and committed Software Developer with expertise in .NET (C# / ASP.NET), modern JavaScript frameworks, and SQL to contribute to impactful projects across a diverse client base. About the role - As a Software Developer, you will be working on the development, and maintenance of their internal software product, ensuring seamless integrations into their clients systems. You'll also get involved with external projects, collaborating closely with clients to understand their needs, and design effective solutions. This role blends hands-on technical work with client interaction, giving you the chance to make a visible impact. Key Responsibilities
We are delighted to be partnering with a successful technology consultancy that is expanding its Software Development team. This is an excellent opportunity for a proactive and committed Software Developer with expertise in .NET (C# / ASP.NET), modern JavaScript frameworks, and SQL to contribute to impactful projects across a diverse client base. About the role - As a Software Developer, you will be working on the development, and maintenance of their internal software product, ensuring seamless integrations into their clients systems. You'll also get involved with external projects, collaborating closely with clients to understand their needs, and design effective solutions. This role blends hands-on technical work with client interaction, giving you the chance to make a visible impact. Key Responsibilities
FEATURED
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Data Management and Business Intelligence Lead - Remote working
Data Management and Business Intelligence Lead - Remote working
Apsley Recruitment Ltd
Bovingdon, CM7
Up to £60,000 per annum bonus and strong package
Strong experience of within the fields of Data Management, Application Estates and Business Intelligence platforms required for a role that will develop into a Senior Management Position. The focus will be on driving clarity, alignment, and performance across these domains. You will need to work closely with our outsourced delivery partners and internal stakeholders to ensure initiatives are well-defined, prioritised, and executed to high standards. While hands-on delivery is not the primary expectation, your ability to understand technical landscapes and translate business needs into actionable direction will be critical to success. Required Skills:- * Strong understanding of data management principles, including governance, quality, security, and life cycle. * Solid grasp of enterprise applications and how they support operational and strategic business functions.
Strong experience of within the fields of Data Management, Application Estates and Business Intelligence platforms required for a role that will develop into a Senior Management Position. The focus will be on driving clarity, alignment, and performance across these domains. You will need to work closely with our outsourced delivery partners and internal stakeholders to ensure initiatives are well-defined, prioritised, and executed to high standards. While hands-on delivery is not the primary expectation, your ability to understand technical landscapes and translate business needs into actionable direction will be critical to success. Required Skills:- * Strong understanding of data management principles, including governance, quality, security, and life cycle. * Solid grasp of enterprise applications and how they support operational and strategic business functions.
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Data Engineering Technical Lead - Global Investment Bank - London - Hybrid - Permanent - Excellent Package + Benefits - We are working with one of the world's leading banking groups, who we have partnered with for 15 years. We are seeking an experienced Data Architect / EDM Developer / Data Engineering Lead to join their International Technology team in London. You will be a key part of the Architecture, Middleware, Data & Enterprise Services (AMD) division, driving data engineering, integration and automation initiatives across MUFG's EMEA banking and securities entities. This is a hands-on leadership role, combining technical expertise with mentoring and team leadership. Key Responsibilities * Architect, design and deliver enterprise-wide EDM and data solutions. * Lead and mentor EDM developers, ensuring high-quality, cost-effective delivery.
Data Engineering Technical Lead - Global Investment Bank - London - Hybrid - Permanent - Excellent Package + Benefits - We are working with one of the world's leading banking groups, who we have partnered with for 15 years. We are seeking an experienced Data Architect / EDM Developer / Data Engineering Lead to join their International Technology team in London. You will be a key part of the Architecture, Middleware, Data & Enterprise Services (AMD) division, driving data engineering, integration and automation initiatives across MUFG's EMEA banking and securities entities. This is a hands-on leadership role, combining technical expertise with mentoring and team leadership. Key Responsibilities * Architect, design and deliver enterprise-wide EDM and data solutions. * Lead and mentor EDM developers, ensuring high-quality, cost-effective delivery.
FEATURED
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Senior Full Stack Engineer
Senior Full Stack Engineer
REVYBE IT RECRUITMENT LIMITED
EC1, City of London
From £100,000 to £120,000 per annum + Shares
London AI Start-up - Up to £120,000 + Shares + Private Healthcare + Pension - Were working with a well-funded AI start-up in London thats gearing up for huge growth. Theyre expecting to scale 10x over the next 18 months. Theyre now looking for a Senior Full-Stack Engineer to help design and build the next generation of their AI-driven platform. Reporting directly into the CTO and collaborating closely with product and research teams, this is a unique chance to take ownership across the stack and make a lasting impact in a company at the forefront of applied AI. The role - This isnt your standard engineering role youll be working end-to-end across frontend, backend, and cloud infrastructure. Youll build sleek, scalable applications with React and Next.js, design and maintain robust APIs with Node.js and Python, and architect solutions deployed on AWS or GCP.
London AI Start-up - Up to £120,000 + Shares + Private Healthcare + Pension - Were working with a well-funded AI start-up in London thats gearing up for huge growth. Theyre expecting to scale 10x over the next 18 months. Theyre now looking for a Senior Full-Stack Engineer to help design and build the next generation of their AI-driven platform. Reporting directly into the CTO and collaborating closely with product and research teams, this is a unique chance to take ownership across the stack and make a lasting impact in a company at the forefront of applied AI. The role - This isnt your standard engineering role youll be working end-to-end across frontend, backend, and cloud infrastructure. Youll build sleek, scalable applications with React and Next.js, design and maintain robust APIs with Node.js and Python, and architect solutions deployed on AWS or GCP.
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Experience in developing and deploying Cloud Native Applications using Azure PaaS Capabilities (App Services Plans, Key Vault, SQL Azure DB, AzureFunctions, Containers, AKS, Logic Apps, Service Bus, Event Grid, API Management) * Enterprise Integration Technologies such as Azure API Management, Logic Apps, Service Bus.
Experience in developing and deploying Cloud Native Applications using Azure PaaS Capabilities (App Services Plans, Key Vault, SQL Azure DB, AzureFunctions, Containers, AKS, Logic Apps, Service Bus, Event Grid, API Management) * Enterprise Integration Technologies such as Azure API Management, Logic Apps, Service Bus.
NEW
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AWS DevOps Engineer, contract, remote (outside IR35)
AWS DevOps Engineer, contract, remote (outside IR35)
Staffworx Limited
EC1A, City of London
market rates, outside IR35, initial, likely long term extensions
AWS DevOps specialism (Lambda, API Gateway, Route 53, WAF, Shield, IAM, Cognito) * AWS API Gateway
AWS DevOps specialism (Lambda, API Gateway, Route 53, WAF, Shield, IAM, Cognito) * AWS API Gateway
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Familiarity with API testing
Familiarity with API testing
Senior Security Engineer Defender PurView Sentinel
Senior Security Engineer Defender PurView Sentinel
Invitise Ltd
EC1A, City of London
Up to £500 per day Outside IR35
PowerShell scripting and use of Microsoft Graph API
PowerShell scripting and use of Microsoft Graph API
NEW
Senior Security Engineer (PurView, Sentinel, Defender)
Senior Security Engineer (PurView, Sentinel, Defender)
Invitise Ltd
WC1A, Central London
Up to £70,000 per annum + Excellent Benefits
PowerShell scripting and use of Microsoft Graph API
PowerShell scripting and use of Microsoft Graph API
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Senior Backend Engineer
Senior Backend Engineer
Innovate Recruitment Ltd
EC1N, City of London
Up to £95,000 per annum Benefits, Bonus, Share scheme
Experience building cloud-based REST API solutions
Experience building cloud-based REST API solutions
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Proficiency with Git workflows, LAMP stack, and REST API integrations.
Proficiency with Git workflows, LAMP stack, and REST API integrations.
NEWFEATURED
We process hundreds of API requests per second from operators and respond back with latency in milliseconds.
We process hundreds of API requests per second from operators and respond back with latency in milliseconds.
Over the past 25 years, With Intelligence has evolved from a traditional financial publisher into a dynamic, product-led fintech company. Our mission is to empower investors and managers worldwide by connecting them to the people and data they need to raise and allocate assets efficiently. We have recently secured a new round of funding from a prominent technology investor. This investment will drive our committed plan to elevate our product into a pioneering, market-leading platform. We are rapidly expanding our focus on data, both internally and within our products and services. We are now looking for more help in this area to keep up with the growing demands of a dynamic, data driven organisation. We need someone that wants to get stuck in and do stuff! The role requires knowledge and understanding of some data and technical concepts and tools, but we do not expect
Over the past 25 years, With Intelligence has evolved from a traditional financial publisher into a dynamic, product-led fintech company. Our mission is to empower investors and managers worldwide by connecting them to the people and data they need to raise and allocate assets efficiently. We have recently secured a new round of funding from a prominent technology investor. This investment will drive our committed plan to elevate our product into a pioneering, market-leading platform. We are rapidly expanding our focus on data, both internally and within our products and services. We are now looking for more help in this area to keep up with the growing demands of a dynamic, data driven organisation. We need someone that wants to get stuck in and do stuff! The role requires knowledge and understanding of some data and technical concepts and tools, but we do not expect
310 exact matches jobs are outside your preferred location
)
Senior Full Stack Developer JavaScript Python API
Senior Full Stack Developer JavaScript Python API
Client Server
W6, West London
£85000 - £100000 per annum
Senior Full Stack Developer / Engineer (JavaScript Python API) London to £100k - Apply now to find out more about this Senior Full Stack Developer / Engineer (JavaScript Python API) opportunity.
Senior Full Stack Developer / Engineer (JavaScript Python API) London to £100k - Apply now to find out more about this Senior Full Stack Developer / Engineer (JavaScript Python API) opportunity.
NEWPREMIUM
QA Test Engineer Python API Automation
QA Test Engineer Python API Automation
Client Server
Milton, CB24
£40000 - £50000 per annum + bonus + benefits
You have API testing experience - Apply now to find out more about this QA Test Engineer (Python API Automation) opportunity.
You have API testing experience - Apply now to find out more about this QA Test Engineer (Python API Automation) opportunity.
NEWPREMIUM
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React Front End Engineer (TypeScript, API's, some C#/Angular)
React Front End Engineer (TypeScript, API's, some C#/Angular)
Hays
RH6, Gatwick
£45000.0 - £60000.0 per annum + £45-60k + Package
Front End React Engineer (TypeScript, API's, some C#/Angular) We're looking for a minimum of 3+ years commercial experience working hands-on with React/TypeScript integrating API's into their Front End estate.
Front End React Engineer (TypeScript, API's, some C#/Angular) We're looking for a minimum of 3+ years commercial experience working hands-on with React/TypeScript integrating API's into their Front End estate.
NEW
Fidessa Developer Java - Capital Markets
Fidessa Developer Java - Capital Markets
Client Server
The City, EC3
£100000 - £135000 per annum + bonus + benefits
Fidessa Developer (Java Spring Boot API) London to £135k - As a Fidessa Developer (Java Spring Boot API) you will receive a competitive - Apply now to find out more about this Fidessa Developer (Java Spring Boot API) opportunity.
Fidessa Developer (Java Spring Boot API) London to £135k - As a Fidessa Developer (Java Spring Boot API) you will receive a competitive - Apply now to find out more about this Fidessa Developer (Java Spring Boot API) opportunity.
NEWPREMIUM
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On Monday morning, you might be refining an API connection between a collections database and a public-facing platform. You’ll work on varied and meaningful projects; from API-driven integrations to AI experimentation - helping to shape a modern, secure, and scalable technology environment. If you’ve worked in backend development, software engineering, or API management — and you’re confident with modern PHP and Linux — we’d love to hear from you.
On Monday morning, you might be refining an API connection between a collections database and a public-facing platform. You’ll work on varied and meaningful projects; from API-driven integrations to AI experimentation - helping to shape a modern, secure, and scalable technology environment. If you’ve worked in backend development, software engineering, or API management — and you’re confident with modern PHP and Linux — we’d love to hear from you.
NEWPREMIUM
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On Monday morning, you might be refining an API connection between a collections database and a public-facing platform. You’ll work on varied and meaningful projects; from API-driven integrations to AI experimentation - helping to shape a modern, secure, and scalable technology environment. If you’ve worked in backend development, software engineering, or API management — and you’re confident with modern PHP and Linux — we’d love to hear from you.
On Monday morning, you might be refining an API connection between a collections database and a public-facing platform. You’ll work on varied and meaningful projects; from API-driven integrations to AI experimentation - helping to shape a modern, secure, and scalable technology environment. If you’ve worked in backend development, software engineering, or API management — and you’re confident with modern PHP and Linux — we’d love to hear from you.
NEWFEATURED
On Monday morning, you might be refining an API connection between a collections database and a public-facing platform. You’ll work on varied and meaningful projects; from API-driven integrations to AI experimentation - helping to shape a modern, secure, and scalable technology environment. If you’ve worked in backend development, software engineering, or API management — and you’re confident with modern PHP and Linux — we’d love to hear from you.
On Monday morning, you might be refining an API connection between a collections database and a public-facing platform. You’ll work on varied and meaningful projects; from API-driven integrations to AI experimentation - helping to shape a modern, secure, and scalable technology environment. If you’ve worked in backend development, software engineering, or API management — and you’re confident with modern PHP and Linux — we’d love to hear from you.
NEWPREMIUM
On Monday morning, you might be refining an API connection between a collections database and a public-facing platform. You’ll work on varied and meaningful projects; from API-driven integrations to AI experimentation - helping to shape a modern, secure, and scalable technology environment. If you’ve worked in backend development, software engineering, or API management — and you’re confident with modern PHP and Linux — we’d love to hear from you.
On Monday morning, you might be refining an API connection between a collections database and a public-facing platform. You’ll work on varied and meaningful projects; from API-driven integrations to AI experimentation - helping to shape a modern, secure, and scalable technology environment. If you’ve worked in backend development, software engineering, or API management — and you’re confident with modern PHP and Linux — we’d love to hear from you.
NEWFEATURED
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Exposure to Swift Vapor for server-side API development (desirable, not essential).
Exposure to Swift Vapor for server-side API development (desirable, not essential).
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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.
NEWFEATURED
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.NET Framework Version 4.5 or above including strong WCF\ Web API experience
.NET Framework Version 4.5 or above including strong WCF\ Web API experience
NEW
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.NET Framework Version 4.5 or above including strong WCF\ Web API experience
.NET Framework Version 4.5 or above including strong WCF\ Web API experience
NEW
Related Jobs
Locations
- Southwark
- The City, City (EC2)
- The City, City (EC3)
- Duxford
- Felbridge
- Greenwich
- Lambeth
- Moorgate
- Bermondsey
- Bovingdon
- City of London
- South East London
- Cambridge
- Central London
- West End
- South West London
- East London
- Milton Keynes
- West London
- North West London
- London
- Berkshire
- Cambridgeshire
- Surrey
- Buckinghamshire
- Essex
- Oxfordshire
- West Sussex
- Northamptonshire
- Bedfordshire
- South East
- East Anglia
- East Midlands
- Midlands