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Full Stack Developer Node.Js / React
Full Stack Developer Node.Js / React
Halian Technology Limited
W1, Central London
From £60,000 to £65,000 per annum Plus bonus and benefits
My client specialises in digital payments across the UK and Europe. Their platform enables seamless real-time transactions for consumers and businesses, with a focus on security, scalability, and user experience. Backed by top-tier investors and used by thousands daily, were scaling up and looking for passionate engineers to help us build the future of payments. We are seeking a talented and driven Mid-Level Full Stack Engineer with strong skills in Node.js, React, and AWS cloud infrastructure. Youll play a key role in designing, developing, and maintaining scalable microservices and user interfaces for our core payments platform. Youll work in a cross-functional agile team alongside product managers, designers, and fellow engineers to deliver features that directly impact our customers and partners. * Develop backend microservices using Node.js (Express/Nest.js prefe
My client specialises in digital payments across the UK and Europe. Their platform enables seamless real-time transactions for consumers and businesses, with a focus on security, scalability, and user experience. Backed by top-tier investors and used by thousands daily, were scaling up and looking for passionate engineers to help us build the future of payments. We are seeking a talented and driven Mid-Level Full Stack Engineer with strong skills in Node.js, React, and AWS cloud infrastructure. Youll play a key role in designing, developing, and maintaining scalable microservices and user interfaces for our core payments platform. Youll work in a cross-functional agile team alongside product managers, designers, and fellow engineers to deliver features that directly impact our customers and partners. * Develop backend microservices using Node.js (Express/Nest.js prefe
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Senior Backend Engineer
Senior Backend Engineer
Ncounter LTD
SW1, South West London
From £120,000 to £160,000 per annum Equity and package
Product-Focused Backend Engineer Functional Programming & Distributed Systems - London (Hybrid) | £120,000£160,000 + Equity - At Ncounter, were partnering with a cutting-edge AI company on a mission to redefine how professionals in highly regulated industries interact with complex, multi-modal data. Their platform empowers users to deploy custom no-code AI agents that produce verifiable outputs with full transparency - ensuring trust, compliance, and control remain central to every decision. As a Backend Engineer, youll join a growing team working at the forefront of AI infrastructure. This isnt just about clean code or strong delivery - its about ownership, product intuition, and building for scale. Youll be part of a lean, high-calibre engineering function where every member contributes to planning, testing, analysis, and execution.
Product-Focused Backend Engineer Functional Programming & Distributed Systems - London (Hybrid) | £120,000£160,000 + Equity - At Ncounter, were partnering with a cutting-edge AI company on a mission to redefine how professionals in highly regulated industries interact with complex, multi-modal data. Their platform empowers users to deploy custom no-code AI agents that produce verifiable outputs with full transparency - ensuring trust, compliance, and control remain central to every decision. As a Backend Engineer, youll join a growing team working at the forefront of AI infrastructure. This isnt just about clean code or strong delivery - its about ownership, product intuition, and building for scale. Youll be part of a lean, high-calibre engineering function where every member contributes to planning, testing, analysis, and execution.
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Contract Type:Permanent - About the Role - We're looking for an experienced Data Integration Manager to take ownership of how data moves, integrates, and performs across our business. This is a strategic role that sits at the intersection of technology, operations, and business value, ensuring our financial, commercial, and operational data flows are reliable, accurate, and enable smarter decision-making. You'll be the technical owner of our integration partnerships, lead a small specialist team, and work closely with Finance, Operations, and Commercial stakeholders to modernise processes through better data. If you're someone who understands both the technical complexity of enterprise data and the business outcomes it should deliver, we'd love to hear from you. What You'll Be Doing - Leading Enterprise Integration & Data Operations
Contract Type:Permanent - About the Role - We're looking for an experienced Data Integration Manager to take ownership of how data moves, integrates, and performs across our business. This is a strategic role that sits at the intersection of technology, operations, and business value, ensuring our financial, commercial, and operational data flows are reliable, accurate, and enable smarter decision-making. You'll be the technical owner of our integration partnerships, lead a small specialist team, and work closely with Finance, Operations, and Commercial stakeholders to modernise processes through better data. If you're someone who understands both the technical complexity of enterprise data and the business outcomes it should deliver, we'd love to hear from you. What You'll Be Doing - Leading Enterprise Integration & Data Operations
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We are looking for an enthusiastic and proactive Automation Tester with Python and Pytest experience to join our fantastic fintech client, largely remote with get togethers once a month in central London! This Automation Tester will be backend-focused, testing the server-side components, ensuring that the database (SQL), APIs, and business logic function correctly and efficiently. * Backend Automation testing skills with Python and Pytest. * Solid SQL skills and experience with relational databases. * Solid experience in automation testing using tools such as Selenium, Java, PHP, Go, or similar technologies. * Experience with Postman, SOAP UI, and Cucumber. * Batch processing experience. * Financial services / fintech experience. If you're passionate about testing, automation, and continuous learning, we would love to hear from you!
We are looking for an enthusiastic and proactive Automation Tester with Python and Pytest experience to join our fantastic fintech client, largely remote with get togethers once a month in central London! This Automation Tester will be backend-focused, testing the server-side components, ensuring that the database (SQL), APIs, and business logic function correctly and efficiently. * Backend Automation testing skills with Python and Pytest. * Solid SQL skills and experience with relational databases. * Solid experience in automation testing using tools such as Selenium, Java, PHP, Go, or similar technologies. * Experience with Postman, SOAP UI, and Cucumber. * Batch processing experience. * Financial services / fintech experience. If you're passionate about testing, automation, and continuous learning, we would love to hear from you!
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5+ years experience in working with the .NET framework, particularly with ASP.NET Core, React/React Native, C#, Web API Experience developing REST API-driven mobile first web applications
5+ years experience in working with the .NET framework, particularly with ASP.NET Core, React/React Native, C#, Web API Experience developing REST API-driven mobile first web applications
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AI Technical Consultant
AI Technical Consultant
Polar Recruitment Services Ltd
KT13, Weybridge
From £60,000 to £70,000 per annum
Strong proficiency in Python, Java, and SQL/NoSQL databases, along with API development and data integration techniques.
Strong proficiency in Python, Java, and SQL/NoSQL databases, along with API development and data integration techniques.
As a Solution Architect, you will be instrumental in driving the evolution of our SAP platform by delivering API-enabled digital products that integrate key business capabilities. * Familiarity with API management tools and practices, including API versioning, documentation, and security.
As a Solution Architect, you will be instrumental in driving the evolution of our SAP platform by delivering API-enabled digital products that integrate key business capabilities. * Familiarity with API management tools and practices, including API versioning, documentation, and security.
Experience with backend testing and API validation.
Experience with backend testing and API validation.
The National Institute for Health and Care Research (NIHR) is the United Kingdoms largest funder of health and care research. The NIHR invests more than £1.6 billion a year of research funding from the Department of Health and Social Care (DHSC). The NIHRs research programmes, people, centres of excellence and systems together represent the most integrated health research system in the world. Established in 2006 by the Department of Health and Social Care (DHSC), the NIHRs mission is to improve the health and wealth of the nation through research. It funds, supports, and delivers high-quality research that addresses the needs of patients, the public, and the healthcare system. Job Description - The National Institute for Health and Care Research is seeking a strategic and experienced leader to head our Data and Analytics function.
The National Institute for Health and Care Research (NIHR) is the United Kingdoms largest funder of health and care research. The NIHR invests more than £1.6 billion a year of research funding from the Department of Health and Social Care (DHSC). The NIHRs research programmes, people, centres of excellence and systems together represent the most integrated health research system in the world. Established in 2006 by the Department of Health and Social Care (DHSC), the NIHRs mission is to improve the health and wealth of the nation through research. It funds, supports, and delivers high-quality research that addresses the needs of patients, the public, and the healthcare system. Job Description - The National Institute for Health and Care Research is seeking a strategic and experienced leader to head our Data and Analytics function.
Employer Kingston Council Location(s) Kingston, Sutton Workplace Type Hybrid Working Contract Type Permanent Working Hours Full Time Grade I/J Hours Per Week 36 Salary Range £46,968 - £58,461 Salary Basis Per annum Leave Entitlement 30 days Application Deadline - 26/10/2025, 23:55 - Anticipated Interview Date(s) 6-7 Nov 2025 About the Borough - Joining us, you get to work for not just one high performing London Borough, but two. Kingston and Sutton councils have a number of shared services serving both authorities, with some teams and roles more focussed on one council than the other, but the majority are shared across both, meaning you get multiple opportunities to learn from a wider pool of activities and two different political bodies. We work flexibly in both Kingston and Sutton offices, and support working at home or flexible working patterns that enable you to t
Employer Kingston Council Location(s) Kingston, Sutton Workplace Type Hybrid Working Contract Type Permanent Working Hours Full Time Grade I/J Hours Per Week 36 Salary Range £46,968 - £58,461 Salary Basis Per annum Leave Entitlement 30 days Application Deadline - 26/10/2025, 23:55 - Anticipated Interview Date(s) 6-7 Nov 2025 About the Borough - Joining us, you get to work for not just one high performing London Borough, but two. Kingston and Sutton councils have a number of shared services serving both authorities, with some teams and roles more focussed on one council than the other, but the majority are shared across both, meaning you get multiple opportunities to learn from a wider pool of activities and two different political bodies. We work flexibly in both Kingston and Sutton offices, and support working at home or flexible working patterns that enable you to t
Knowledge of database testing and API testing methodologies.
Knowledge of database testing and API testing methodologies.
228 exact matches jobs are outside your preferred location
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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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.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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A strong emphasis is placed on creating scalable, testable integration pipelines with effective error management, high availability, and full lifecycle testing to ensure robust API interactions and telemetry tracking. o Integration and API testing * Develop and manage SQL Server databases used for API-driven integrations and data pipeline control * Produce clear and thorough documentation for integration flows, deployment configurations, testing processes, and operational support manuals * Create interactive dashboards to monitor API traffic and support reconciliation and business insight requirements
A strong emphasis is placed on creating scalable, testable integration pipelines with effective error management, high availability, and full lifecycle testing to ensure robust API interactions and telemetry tracking. o Integration and API testing * Develop and manage SQL Server databases used for API-driven integrations and data pipeline control * Produce clear and thorough documentation for integration flows, deployment configurations, testing processes, and operational support manuals * Create interactive dashboards to monitor API traffic and support reconciliation and business insight requirements
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API integration
API integration
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Back End Integration Engineer
Back End Integration Engineer
I3 Resourcing Limited
The City, EC3V 3ND
£70000 - £80000 per annum + + BENS + BONUS
Strong experience in application and integration design, including microservices architecture and API lifecycle management. o API Management, Service Bus, Logic Apps, Azure Functions
Strong experience in application and integration design, including microservices architecture and API lifecycle management. o API Management, Service Bus, Logic Apps, Azure Functions
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Implement API integrations with external services * Proficient in Node.js, Git, and API integration
Implement API integrations with external services * Proficient in Node.js, Git, and API integration
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Senior/Lead Full Stack Developer (React / Python) AI Start up!
Senior/Lead Full Stack Developer (React / Python) AI Start up!
Robert Half
EC1, City of London
Negotiable
API & database experience
API & database experience
Collaborate with Data Analysts, Architects, and system owners to improve data quality and support API/Middleware-based data management. * Full lifecycle development experience on the Mulesoft Anypoint Platform (Design Centre, Exchange, Studio, API Manager, Runtime Manager). * Proficiency in RESTful API development and working with XML, XSLT, and XSD.
Collaborate with Data Analysts, Architects, and system owners to improve data quality and support API/Middleware-based data management. * Full lifecycle development experience on the Mulesoft Anypoint Platform (Design Centre, Exchange, Studio, API Manager, Runtime Manager). * Proficiency in RESTful API development and working with XML, XSLT, and XSD.
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Python, Flask ,Azure, MySQL, API, Django, FastAPI
Python, Flask ,Azure, MySQL, API, Django, FastAPI
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Good understanding of API testing * Basic understanding of API automation using python
Good understanding of API testing * Basic understanding of API automation using python
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Deep understanding of RESTful API design and integration
Deep understanding of RESTful API design and integration
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Familiarity with workflow automation solutions (UiPath, Power Automate, Zapier, n8n) and API development
Familiarity with workflow automation solutions (UiPath, Power Automate, Zapier, n8n) and API development
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Experience with API testing and an understanding of API integration methods
Experience with API testing and an understanding of API integration methods
Test Automation: Develop, maintain, and scale automated test suites (UI, API, and regression) to support rapid releases. * Familiarity with API testing tools (e.g., Postman, REST Assured).
Test Automation: Develop, maintain, and scale automated test suites (UI, API, and regression) to support rapid releases. * Familiarity with API testing tools (e.g., Postman, REST Assured).
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