Date posted
Commute time
Locations
Type of Company
Job types
Salaries
Locations
Locations
Salaries
Date posted
Type of Company
Job types
6 Permanent API jobs in Chelmsford + 20 miles
506 exact matches jobs are outside your preferred location
)
We're looking for a skilled Full-Stack Developer who thrives at the intersection of geospatial data, modern web technologies, and backend API development. Backend: Node.js, Python, .NET (or equivalent) API development * Proven experience in front-end mapping libraries and backend API development
We're looking for a skilled Full-Stack Developer who thrives at the intersection of geospatial data, modern web technologies, and backend API development. Backend: Node.js, Python, .NET (or equivalent) API development * Proven experience in front-end mapping libraries and backend API development
NEW
)
The Hoddesdon site has state-of-the-art Good Manufacturing Practice (GMP) standard facilities for the development of Active Pharmaceutical Ingredients (API), Formulation Development (FD) and Process Chemistry (PC).
The Hoddesdon site has state-of-the-art Good Manufacturing Practice (GMP) standard facilities for the development of Active Pharmaceutical Ingredients (API), Formulation Development (FD) and Process Chemistry (PC).
NEW
)
Experience with relational databases and API design.
Experience with relational databases and API design.
NEW
Senior Java Engineering Lead - Digital Markets Infrastructure
Senior Java Engineering Lead - Digital Markets Infrastructure
London Stock Exchange
South East
Competitive
Solid understanding of REST API design principles.
Solid understanding of REST API design principles.
)
API development using technologies and standards like REST/GraphQL/gRPC or similar.
API development using technologies and standards like REST/GraphQL/gRPC or similar.
NEW
)
FIEQ Product, BNY London - At BNY, our culture allows us to run our company better and enables employees growth and success. As a leading global financial services company at the heart of the global financial system, we influence nearly 20% of the worlds investible assets. Every day, our teams harness cutting-edge AI and breakthrough technologies to collaborate with clients, driving transformative solutions that redefine industries and uplift communities worldwide. Recognized as a top destination for innovators and champions of inclusion, BNY is where bold ideas meet advanced technology and exceptional talent. Together, we power the future of finance and this is what #LifeAtBNY is all about. Join us and be part of something extraordinary. The Markets business helps our clients formulate, implement and operationalize their investment strategies.
FIEQ Product, BNY London - At BNY, our culture allows us to run our company better and enables employees growth and success. As a leading global financial services company at the heart of the global financial system, we influence nearly 20% of the worlds investible assets. Every day, our teams harness cutting-edge AI and breakthrough technologies to collaborate with clients, driving transformative solutions that redefine industries and uplift communities worldwide. Recognized as a top destination for innovators and champions of inclusion, BNY is where bold ideas meet advanced technology and exceptional talent. Together, we power the future of finance and this is what #LifeAtBNY is all about. Join us and be part of something extraordinary. The Markets business helps our clients formulate, implement and operationalize their investment strategies.
NEW
Proficiency with Windows API (Win32/COM), media devices (audio/video), and OS-level integration.
Proficiency with Windows API (Win32/COM), media devices (audio/video), and OS-level integration.
Expertise in cloud architecture, microservices, API gateway design, DevOps practices, datapipelines, and enterprise service mesh architecture.
Expertise in cloud architecture, microservices, API gateway design, DevOps practices, datapipelines, and enterprise service mesh architecture.
NEW
The Solutions Engineering team at Wise Platform bridges the gap between Wises technical capabilities and our partners needs, ensuring seamless API integration and optimal solution delivery. * Deep technical expertise in API-first platforms, SaaS solutions, and complex system integrations.
The Solutions Engineering team at Wise Platform bridges the gap between Wises technical capabilities and our partners needs, ensuring seamless API integration and optimal solution delivery. * Deep technical expertise in API-first platforms, SaaS solutions, and complex system integrations.
Proficiency in AWS services and serverless architecture including Lambda, API gateway, Elastic Beanstalk, EC2, S3, Aurora, Security Groups, and CloudWatch.
Proficiency in AWS services and serverless architecture including Lambda, API gateway, Elastic Beanstalk, EC2, S3, Aurora, Security Groups, and CloudWatch.
Closing date: 12/08/2025 - 37 hours / Permanent - 37,938 - 39,513 * Canolfan Rheidol, Aberystwyth *All salary values are pro-rata. Apply Online - About the role - Please note that the advertised salary for this position is subject to a pending pay award. The final salary will be adjusted in line with the nationally agreed pay award. Join Our Team as a ICT Senior Data Engineer - We are seeking a highly skilled Data Engineer to join our team. This role focuses on managing and transitioning data from traditional on-premises SQL environments to Azure cloud solutions, with a special emphasis on master data management using MS Azure SQL. The successful candidate will be key in integrating various Management Information System (MIS) databases with Azure master data repositories. Ceredigion County Council is a leading, innovative organisation that are supporting the citizens
Closing date: 12/08/2025 - 37 hours / Permanent - 37,938 - 39,513 * Canolfan Rheidol, Aberystwyth *All salary values are pro-rata. Apply Online - About the role - Please note that the advertised salary for this position is subject to a pending pay award. The final salary will be adjusted in line with the nationally agreed pay award. Join Our Team as a ICT Senior Data Engineer - We are seeking a highly skilled Data Engineer to join our team. This role focuses on managing and transitioning data from traditional on-premises SQL environments to Azure cloud solutions, with a special emphasis on master data management using MS Azure SQL. The successful candidate will be key in integrating various Management Information System (MIS) databases with Azure master data repositories. Ceredigion County Council is a leading, innovative organisation that are supporting the citizens
The Payin Platform is an internal API product. Our API product facilitates these inflows and presents a unified view of the money movement that consolidates all of these use-cases.
The Payin Platform is an internal API product. Our API product facilitates these inflows and presents a unified view of the money movement that consolidates all of these use-cases.
You understand and care deeply about the developer journey, from first API call to production deployment.
You understand and care deeply about the developer journey, from first API call to production deployment.
NEW
You will bring deep expertise in Okta capabilities, including Okta Customer Identity Cloud (CIC) , Okta Workforce Identity Cloud (WIC) , Single Sign-On, Adaptive Multi-Factor Authentication, API Access Management, Lifecycle Management, and Universal Directory. * Hands-on experience delivering Okta Identity Cloud solutions, including configuration of SSO, Adaptive MFA, API Access Management, and Lifecycle Management. * Proficiency with Okta Hooks (Inline, Event), Okta Workflows , and automation via Okta API , Terraform , or Okta Integration Network .
You will bring deep expertise in Okta capabilities, including Okta Customer Identity Cloud (CIC) , Okta Workforce Identity Cloud (WIC) , Single Sign-On, Adaptive Multi-Factor Authentication, API Access Management, Lifecycle Management, and Universal Directory. * Hands-on experience delivering Okta Identity Cloud solutions, including configuration of SSO, Adaptive MFA, API Access Management, and Lifecycle Management. * Proficiency with Okta Hooks (Inline, Event), Okta Workflows , and automation via Okta API , Terraform , or Okta Integration Network .
Knowledge of RESTful API design and development
Knowledge of RESTful API design and development
Technical Testing of APIs including Authentication & Authorisation, API Requests & Responses and API response codes using tools such as Postman
Technical Testing of APIs including Authentication & Authorisation, API Requests & Responses and API response codes using tools such as Postman
Collaborate with Ops Tech to manage API use, system performance, and platform scalability. * Working knowledge of JavaScript or Python for API interactions for customizations.
Collaborate with Ops Tech to manage API use, system performance, and platform scalability. * Working knowledge of JavaScript or Python for API interactions for customizations.
NEW
Liaise and collaborate with internal stakeholders such as TAs, SMEs and other discipline Engineers to deliver structural engineering services ensuring compliance with industry design standards (ISO, API, DNV, NORSOK, etc.) and certification requirements.
Liaise and collaborate with internal stakeholders such as TAs, SMEs and other discipline Engineers to deliver structural engineering services ensuring compliance with industry design standards (ISO, API, DNV, NORSOK, etc.) and certification requirements.
Familiarity with troubleshooting frontend build systems, serverless runtimes, and API integrations
Familiarity with troubleshooting frontend build systems, serverless runtimes, and API integrations
Previous experience working with various API Valves (including Anson, WOM, T3, Cameron) - essential
Previous experience working with various API Valves (including Anson, WOM, T3, Cameron) - essential
Investigate complex technical issues escalated from our global CX team using tools like Chrome DevTools, API logs, and internal monitoring systems.
Investigate complex technical issues escalated from our global CX team using tools like Chrome DevTools, API logs, and internal monitoring systems.
Troubleshooting and configuring Privileged applications, Privileged ID Management, and API integrations.
Troubleshooting and configuring Privileged applications, Privileged ID Management, and API integrations.
Experience contributing to the development of insurance platforms and secondary systems (BDX, MI, API).
Experience contributing to the development of insurance platforms and secondary systems (BDX, MI, API).
TransUnion's Job Applicant Privacy Notice - We support organisations across a variety of sectors including finance, retail, telecommunications, utilities, gaming, government and insurance. Were looking for a Solution Architect to join our growing team. * Design scalable solutions, identifying gaps between current and desired end-states, to enable achievement of the desired business outcomes in alignment with the journey roadmap and organization goals, knowing how to work in and around the limits of the platform. * Act as a solution guide, being able to speak conceptually, document the proposed solution and be comfortable doing hands on configuration and/or coding. May build proof-of-concept (POCs) that can be carried forward by the team. * Stay up to date with the latest Salesforce releases, features, and functionalities, and provide guidance on leveraging new capabil
TransUnion's Job Applicant Privacy Notice - We support organisations across a variety of sectors including finance, retail, telecommunications, utilities, gaming, government and insurance. Were looking for a Solution Architect to join our growing team. * Design scalable solutions, identifying gaps between current and desired end-states, to enable achievement of the desired business outcomes in alignment with the journey roadmap and organization goals, knowing how to work in and around the limits of the platform. * Act as a solution guide, being able to speak conceptually, document the proposed solution and be comfortable doing hands on configuration and/or coding. May build proof-of-concept (POCs) that can be carried forward by the team. * Stay up to date with the latest Salesforce releases, features, and functionalities, and provide guidance on leveraging new capabil
Are comfortable writing Python scripts for data wrangling and API interaction
Are comfortable writing Python scripts for data wrangling and API interaction