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46 Permanent API jobs in South Croydon + 20 miles
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We're looking for an experienced Senior Application Support Engineer to join a growing IT team and play a key role in supporting critical business applications across a modern and complex technology stack. * Investigating and resolving technical incidents, ensuring minimal downtime and effective root cause analysis * Proactively maintaining and optimising applications, performing upgrades and configuration changes * Monitoring system performance, defining service-level objectives, and addressing bottlenecks before they impact users * Collaborating closely with engineering and business teams to drive operational excellence * Enhancing processes, documentation, and tooling to support continuous improvement * Proven experience in an application support or support engineering role, within financial services ideally, or another regulated environment
We're looking for an experienced Senior Application Support Engineer to join a growing IT team and play a key role in supporting critical business applications across a modern and complex technology stack. * Investigating and resolving technical incidents, ensuring minimal downtime and effective root cause analysis * Proactively maintaining and optimising applications, performing upgrades and configuration changes * Monitoring system performance, defining service-level objectives, and addressing bottlenecks before they impact users * Collaborating closely with engineering and business teams to drive operational excellence * Enhancing processes, documentation, and tooling to support continuous improvement * Proven experience in an application support or support engineering role, within financial services ideally, or another regulated environment
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Deep Azure expertise, with M365 ecosystem governance: Power Platform, E5 optimisation, Azure integration services such as Logic Apps, Service Bus, Event Grid, API Management).
Deep Azure expertise, with M365 ecosystem governance: Power Platform, E5 optimisation, Azure integration services such as Logic Apps, Service Bus, Event Grid, API Management).
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Expertise in open-source frameworks, API-led design, and secure, scalable architectures.
Expertise in open-source frameworks, API-led design, and secure, scalable architectures.
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Senior Quality Assurance Engineer
Senior Quality Assurance Engineer
Alexander Edward James Consulting Limited
EC2, City of London
From £60,000 to £80,000 per annum
Build and expand API-level test coverage for distributed and event-driven services.
Build and expand API-level test coverage for distributed and event-driven services.
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C++ Software Engineer MacOS - Cyber Security
C++ Software Engineer MacOS - Cyber Security
Client Server
The City, EC4
£65000 - £80000 per annum + benefits
C++ Software Engineer / Developer (C++ Mac Extensions API) WFH / London to £80k - As a C++ Software Engineer you will focus on enabling the core product, written in C / C++ for Windows and Linux to run on Apple Mac software, using the latest Extensions, tools and API integrations. Apply now to find out more about this C++ Software Engineer / Developer (C++ Mac Extensions API) opportunity.
C++ Software Engineer / Developer (C++ Mac Extensions API) WFH / London to £80k - As a C++ Software Engineer you will focus on enabling the core product, written in C / C++ for Windows and Linux to run on Apple Mac software, using the latest Extensions, tools and API integrations. Apply now to find out more about this C++ Software Engineer / Developer (C++ Mac Extensions API) opportunity.
NEWPREMIUM
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.NET Developer
.NET Developer
Halian Technology Limited
W1, Central London
From £70,000 to £80,000 per annum Plus bonus and benefits
Proven hands-on experience withAWS servicessuch as Lambda, ECS/Fargate, API Gateway, DynamoDB, S3, CloudFormation/Terraform.
Proven hands-on experience withAWS servicessuch as Lambda, ECS/Fargate, API Gateway, DynamoDB, S3, CloudFormation/Terraform.
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Build, deploy, and monitor solutions using AWS services (Lambda, API Gateway, CloudWatch, ECS, ECR, Dynamo, S3 etc.) * Design, deploy, and manage applications tailored to business needs, while customizing platforms and overseeing the full API lifecycle using Apigee Edge and X. * Drive API strategy execution, provide technical support, and generate insights through analytics to enhance integrations and documentation. * Ability to generate custom analytics reports for API consumption and errors * Implementation of API security and access control (OAuth, API keys, JWT, etc.) * Familiarity with API design patterns, best practices, and performance optimization
Build, deploy, and monitor solutions using AWS services (Lambda, API Gateway, CloudWatch, ECS, ECR, Dynamo, S3 etc.) * Design, deploy, and manage applications tailored to business needs, while customizing platforms and overseeing the full API lifecycle using Apigee Edge and X. * Drive API strategy execution, provide technical support, and generate insights through analytics to enhance integrations and documentation. * Ability to generate custom analytics reports for API consumption and errors * Implementation of API security and access control (OAuth, API keys, JWT, etc.) * Familiarity with API design patterns, best practices, and performance optimization
NEWFEATURED
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SharePoint Developer
SharePoint Developer
PPF (Pension Protection Fund)
CR0, Croydon
From £56,000 to £61,500 per annum plus Civil Service pension and other
You should be confident working with cloud technologies like Azure, API development and integration, and SharePoint administration.
You should be confident working with cloud technologies like Azure, API development and integration, and SharePoint administration.
NEWFEATURED
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AI (artificial intelligence) DevOps Engineer
AI (artificial intelligence) DevOps Engineer
Huxley Associates
EC1, City of London
£60000 - £90000 per annum
You'll also ensure alignment with enterprise-grade security practices, including zero trust principles, identity-aware routing, and integration with Azure API Management and Application Gateway. * API Gateway, Azure API Management (APIM), Azure Application Gateway
You'll also ensure alignment with enterprise-grade security practices, including zero trust principles, identity-aware routing, and integration with Azure API Management and Application Gateway. * API Gateway, Azure API Management (APIM), Azure Application Gateway
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Senior Software Developer
Senior Software Developer
Inspire People
CR2, South Croydon
£49600 - £60800 per annum + 29% pension + Civil Service benefits
Solid understanding of system design, API development and integration practices
Solid understanding of system design, API development and integration practices
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Digital and Web Analyst
Digital and Web Analyst
iQ Student Accommodation Astor House
SE1, South East London, SE1 2DB
£55k - 60k per year + 25 days annual leave (plus bank holidays)
Familiarity with conversion APIs (Meta CAPI, Google Enhanced Conversions, TikTok Events API)
Familiarity with conversion APIs (Meta CAPI, Google Enhanced Conversions, TikTok Events API)
NEWFEATURED
Writing (looking for experience with Scala, JavaScript, Java or any ideally procedural programming or alternatively object-orientated language), running and debugging functional automation tests on an integrated development environment (IDE) for front-end and API testing and frameworks including Cucumber BDD or Junit or Rest Assured
Writing (looking for experience with Scala, JavaScript, Java or any ideally procedural programming or alternatively object-orientated language), running and debugging functional automation tests on an integrated development environment (IDE) for front-end and API testing and frameworks including Cucumber BDD or Junit or Rest Assured
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Strong background in software architecture, microservices, and API design.
Strong background in software architecture, microservices, and API design.
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Build, deploy, and monitor solutions using AWS services (Lambda, API customizing platforms and overseeing the full API lifecycle using Apigee Edge and X. Drive API strategy execution, provide technical support, and generate insights - o Ensure API security and access control using OAuth, API keys, JWT, and other - o Strong knowledge of Apigee or similar API Management platforms. o Implement API design patterns, performance optimization, and custom - analytics reporting for API consumption and error tracking.
Build, deploy, and monitor solutions using AWS services (Lambda, API customizing platforms and overseeing the full API lifecycle using Apigee Edge and X. Drive API strategy execution, provide technical support, and generate insights - o Ensure API security and access control using OAuth, API keys, JWT, and other - o Strong knowledge of Apigee or similar API Management platforms. o Implement API design patterns, performance optimization, and custom - analytics reporting for API consumption and error tracking.
NEWFEATURED
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Build and work with modern API and microservices architectures
Build and work with modern API and microservices architectures
NEWEQUALITY BOOST
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Our tech stack and methodologies: C# .NET (8+), Terraform, Typescript - Services: Rest API; Event-driven, Microservice, Serverless architecture - Principles: TDD, Agile, Pair Programming - CI/CD: Git, Docker, Bamboo - Cloud: AWS, Lambda, ECS - Databases/Storage: Postgres , Dynamo, DocumentDb, OpenSearch/Elastic, Redis - Monitoring: Cloudwatch, Kibana, Grafana, DataDog
Our tech stack and methodologies: C# .NET (8+), Terraform, Typescript - Services: Rest API; Event-driven, Microservice, Serverless architecture - Principles: TDD, Agile, Pair Programming - CI/CD: Git, Docker, Bamboo - Cloud: AWS, Lambda, ECS - Databases/Storage: Postgres , Dynamo, DocumentDb, OpenSearch/Elastic, Redis - Monitoring: Cloudwatch, Kibana, Grafana, DataDog
PREMIUM
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API testing experience (REST/GraphQL) - both automated and manual * Python knowledge (for backend/API testing)
API testing experience (REST/GraphQL) - both automated and manual * Python knowledge (for backend/API testing)
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Experience with API testing tools such as Postman.
Experience with API testing tools such as Postman.
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Principal Software Engineer - Unified Client Experience (UCX)
Principal Software Engineer - Unified Client Experience (UCX)
Hargreaves Lansdown
EC1, City of London
Up to £11500 per annum + Generous bonus, pension, PMI & more
Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services.
Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services.
NEWFEATURED
Senior Software Engineer - Unified Client Experience (UCX)
Senior Software Engineer - Unified Client Experience (UCX)
Hargreaves Lansdown
EC1, City of London
£75000 - £95000 per annum + Generous bonus, pension, PMI & more
Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services.
Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services.
NEWFEATURED
Software Engineering Manager - Unified Client Experience (UCX)
Software Engineering Manager - Unified Client Experience (UCX)
Hargreaves Lansdown
EC1, City of London
£90000 - £115000 per annum + Generous bonus, pension, PMI and more
Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services.
Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services.
NEWFEATURED
118 exact matches jobs are outside your preferred location
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Job Description - UK CITIZENSHIP REQUIRED FOR THIS POSITION: Yes - RELOCATION ASSISTANCE: Relocation assistance may be available - CLEARANCE TYPE: UK-Highest Level of Government Clearance - TRAVEL: Yes, 10% of the Time - Salary: £77,400 - £116,000 - Define Possible at Northrop Grumman UK - At Northrop Grumman UK, our mission is to solve the most complex challenges by shaping the technology and solutions of tomorrow. We call it Defining Possible. This mind-set goes beyond our customer solutions; its the foundation for your career development and the impact we have within the community. So, whats your possible? This is more than just a job; its a mission. We are seeking an experienced Elasticsearch Platforms Engineer to join our Data Platforms Infrastructure team. This role is pivotal in supporting and maintaining our Elastic Cloud Enterprise (ECE) environment, designin
Job Description - UK CITIZENSHIP REQUIRED FOR THIS POSITION: Yes - RELOCATION ASSISTANCE: Relocation assistance may be available - CLEARANCE TYPE: UK-Highest Level of Government Clearance - TRAVEL: Yes, 10% of the Time - Salary: £77,400 - £116,000 - Define Possible at Northrop Grumman UK - At Northrop Grumman UK, our mission is to solve the most complex challenges by shaping the technology and solutions of tomorrow. We call it Defining Possible. This mind-set goes beyond our customer solutions; its the foundation for your career development and the impact we have within the community. So, whats your possible? This is more than just a job; its a mission. We are seeking an experienced Elasticsearch Platforms Engineer to join our Data Platforms Infrastructure team. This role is pivotal in supporting and maintaining our Elastic Cloud Enterprise (ECE) environment, designin
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Proficiency in cloud platforms, API development, message buses, DevOps practices, and languages such as C#, Python, or PHP
Proficiency in cloud platforms, API development, message buses, DevOps practices, and languages such as C#, Python, or PHP
FEATURED
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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
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Drive architectural decisions across all software systems (cloud, mobile, and API layers).
Drive architectural decisions across all software systems (cloud, mobile, and API layers).
NEWPREMIUM