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18 Permanent API jobs in West Sussex + 20 miles
483 exact matches jobs are outside your preferred location
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C# .NET Software Developer with FX and Fixed Income
C# .NET Software Developer with FX and Fixed Income
Nexus Jobs
City of London (EC1)
From £80,000 to £100,000 per annum
Our Client is a niche boutique broker specialising in FX. They are looking to recruit a C# .NET Software Developer with at least 3 to 5 years proven track record of developing with C# .NET. The Client would like meet candidates ideally with some understanding Trading Floor projects to include Fixed Income, Risk Management, Swap Options and FX. You need to be resilient as you will be working closely with traders and developing financial trading systems so an understanding of FX instruments would be very useful. The Company is a fast growing dynamic brokerage firm, specialising in currency options and interest rate swaps. They are seeking a talented technologist to join the London team. You will be working in a fast paced, delivery focused environment where you will get the opportunity to make a genuine impact on the business rather than just making up the numbers.
Our Client is a niche boutique broker specialising in FX. They are looking to recruit a C# .NET Software Developer with at least 3 to 5 years proven track record of developing with C# .NET. The Client would like meet candidates ideally with some understanding Trading Floor projects to include Fixed Income, Risk Management, Swap Options and FX. You need to be resilient as you will be working closely with traders and developing financial trading systems so an understanding of FX instruments would be very useful. The Company is a fast growing dynamic brokerage firm, specialising in currency options and interest rate swaps. They are seeking a talented technologist to join the London team. You will be working in a fast paced, delivery focused environment where you will get the opportunity to make a genuine impact on the business rather than just making up the numbers.
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Senior Software Engineer .NET React
Senior Software Engineer .NET React
Anson Mccade
South East London (SE1)
From £80,000 to £105,000 per annum
Senior Software Engineer (Early-Stage SaaS | .NET & React)?? London | ?? On-site | ?? Full-time | ?? Up to £100k + equity - The Role - A fast-growing startup is building a financial operations platform and is looking for a hands-on Senior Software Engineer. Youll help build the product from the ground up, own key features, and have a real influence on both the technology and the direction of the platform. What Youll Do * Build new features across the backend and frontend * Work with .NET and a modern JavaScript framework (React used internally) * Help shape the architecture as the platform scales * Work closely with founders, engineers and product teams * Take ideas from concept to production - What You Need * Experience building software with .NET or another modern backend language * Experience with JavaScript/TypeScript on the frontend * Comfortable working with API
Senior Software Engineer (Early-Stage SaaS | .NET & React)?? London | ?? On-site | ?? Full-time | ?? Up to £100k + equity - The Role - A fast-growing startup is building a financial operations platform and is looking for a hands-on Senior Software Engineer. Youll help build the product from the ground up, own key features, and have a real influence on both the technology and the direction of the platform. What Youll Do * Build new features across the backend and frontend * Work with .NET and a modern JavaScript framework (React used internally) * Help shape the architecture as the platform scales * Work closely with founders, engineers and product teams * Take ideas from concept to production - What You Need * Experience building software with .NET or another modern backend language * Experience with JavaScript/TypeScript on the frontend * Comfortable working with API
PREMIUM
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Trafalgar Talent is supporting a fast-growing, multi-award-winning cybersecurity business as they continue to scale their development team. This organisation builds cutting-edge security products used by millions worldwide, helping protect users from evolving digital threats across all their devices. Theyve developed a suite of powerful tools, including antivirus, VPN, ad-blocking, password management and more, all designed to simplify and strengthen online safety for everyday users. With continuous growth and new product innovation underway, the team is now looking for an experienced PHP Developer to join their high-performing engineering function. The Role - As a Senior PHP Developer, youll play a key part in shaping and improving the companys core web systems. * User onboarding journeys * Customer account portals * APIs powering multiple applications
Trafalgar Talent is supporting a fast-growing, multi-award-winning cybersecurity business as they continue to scale their development team. This organisation builds cutting-edge security products used by millions worldwide, helping protect users from evolving digital threats across all their devices. Theyve developed a suite of powerful tools, including antivirus, VPN, ad-blocking, password management and more, all designed to simplify and strengthen online safety for everyday users. With continuous growth and new product innovation underway, the team is now looking for an experienced PHP Developer to join their high-performing engineering function. The Role - As a Senior PHP Developer, youll play a key part in shaping and improving the companys core web systems. * User onboarding journeys * Customer account portals * APIs powering multiple applications
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We are seeking an experienced IT Project Manager / Business Analyst to manage the delivery and enhancement of cloud-based and outsourced IT solutions, ensuring they align with business needs and deliver measurable value. This role combines project management and business analysis responsibilities, focusing on coordinating vendors, defining business requirements, and ensuring successful implementation and adoption of third-party solutions. Additionally, you will join an organisation actively investing in Generative AI and Agentic AI technologies to automate both routine and complex tasks to increase efficiency, enhance decision-making and reduce operational risk. The role offers the opportunity to contribute to projects that explore the integration of AI capabilities into business processes and systems. Key Responsibilities - Project Management
We are seeking an experienced IT Project Manager / Business Analyst to manage the delivery and enhancement of cloud-based and outsourced IT solutions, ensuring they align with business needs and deliver measurable value. This role combines project management and business analysis responsibilities, focusing on coordinating vendors, defining business requirements, and ensuring successful implementation and adoption of third-party solutions. Additionally, you will join an organisation actively investing in Generative AI and Agentic AI technologies to automate both routine and complex tasks to increase efficiency, enhance decision-making and reduce operational risk. The role offers the opportunity to contribute to projects that explore the integration of AI capabilities into business processes and systems. Key Responsibilities - Project Management
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Salesforce QA Engineer
Salesforce QA Engineer
Yolk Recruitment
Morden, London (SM4)
£50000.00 - £60000.00 per annum + + excellent benefits
Yolk Recruitment are working with a leading global organisation that continues to grow and invest in its Salesforce capability. Known for its collaborative culture and commitment to continuous improvement, this is an excellent opportunity for a Salesforce QA Tester to make a real impact within a forward-thinking technology team. We're looking for someone who's passionate about quality and experienced in ensuring Salesforce solutions meet the highest standards of reliability and performance. You'll work closely with cross-functional teams to test, validate, and optimise Salesforce functionality, integrations, and custom developments. * Collaborate with developers, business analysts, and project teams to understand requirements and define effective test strategies. * Perform thorough manual testing of Salesforce applications, identifying and documenting defects for ...
Yolk Recruitment are working with a leading global organisation that continues to grow and invest in its Salesforce capability. Known for its collaborative culture and commitment to continuous improvement, this is an excellent opportunity for a Salesforce QA Tester to make a real impact within a forward-thinking technology team. We're looking for someone who's passionate about quality and experienced in ensuring Salesforce solutions meet the highest standards of reliability and performance. You'll work closely with cross-functional teams to test, validate, and optimise Salesforce functionality, integrations, and custom developments. * Collaborate with developers, business analysts, and project teams to understand requirements and define effective test strategies. * Perform thorough manual testing of Salesforce applications, identifying and documenting defects for ...
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We're looking for an experienced Front-End Developer to join a fast-paced digital transformation project for a leading UK-based organisation in the manufacturing sector. This is an opportunity to make an immediate impact on a complex internal system used across multiple teams. You'll be joining at the latter stages of a large internal rebuild, helping optimise and refine an order processing platform that integrates data from over 40 different software tools. The ideal candidate will have a sharp eye for detail, a strong understanding of front-end best practices, and the ability to hit the ground running in a dynamic environment. * JavaScript (ES6+) * Vue.js * HTML5 / CSS3 * REST APIs & JSON * Enhance and streamline the user interface for an internal order processing system * Optimise workflows and improve system usability for internal teams
We're looking for an experienced Front-End Developer to join a fast-paced digital transformation project for a leading UK-based organisation in the manufacturing sector. This is an opportunity to make an immediate impact on a complex internal system used across multiple teams. You'll be joining at the latter stages of a large internal rebuild, helping optimise and refine an order processing platform that integrates data from over 40 different software tools. The ideal candidate will have a sharp eye for detail, a strong understanding of front-end best practices, and the ability to hit the ground running in a dynamic environment. * JavaScript (ES6+) * Vue.js * HTML5 / CSS3 * REST APIs & JSON * Enhance and streamline the user interface for an internal order processing system * Optimise workflows and improve system usability for internal teams
We are looking for an Engineering Manager (f/m/d) to lead a high-performing, remote-first API development team based in Europe who are driving Contentfuls REST and GraphQL APIs that enable customers to manage and deliver content at scale. We aim to help customers accelerate innovation, reduce operational complexity, and unlock new growth opportunities through a secure, performant, and extensible API ecosystem. * Lead and grow a globally-distributed API development team, ensuring a culture of high performance, collaboration, and continuous improvement. * Experience with API-first platforms.
We are looking for an Engineering Manager (f/m/d) to lead a high-performing, remote-first API development team based in Europe who are driving Contentfuls REST and GraphQL APIs that enable customers to manage and deliver content at scale. We aim to help customers accelerate innovation, reduce operational complexity, and unlock new growth opportunities through a secure, performant, and extensible API ecosystem. * Lead and grow a globally-distributed API development team, ensuring a culture of high performance, collaboration, and continuous improvement. * Experience with API-first platforms.
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Software Developer (.Net)
Software Developer (.Net)
Spectrum It Recruitment Limited
Reading (RG1)
£50000 - £60000 per annum + Benefits & Progression
API Development
API Development
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The successful applicant will have comprehensive expertise in Microsoft Azure services, Web API, Azure App Service, .NET Core, and Visual Studio. * Design and implement scalable cloud solutions utilizing Azure App Service, Web API, and .NET Core. * Define architecture patterns for microservices, API management, and integration with enterprise systems. * Utilize Azure Functions, Azure Logic Apps, Azure API Management, and Azure Storage to develop robust applications. * Expertise in Microsoft Azure services, including App Service, Functions, API Management, Storage, and Networking. * Strong knowledge of .NET Core, Web API, C#, and Visual Studio.
The successful applicant will have comprehensive expertise in Microsoft Azure services, Web API, Azure App Service, .NET Core, and Visual Studio. * Design and implement scalable cloud solutions utilizing Azure App Service, Web API, and .NET Core. * Define architecture patterns for microservices, API management, and integration with enterprise systems. * Utilize Azure Functions, Azure Logic Apps, Azure API Management, and Azure Storage to develop robust applications. * Expertise in Microsoft Azure services, including App Service, Functions, API Management, Storage, and Networking. * Strong knowledge of .NET Core, Web API, C#, and Visual Studio.
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Essential Exp: Java 11/17, Springboot, REST API's, Microservices, Kubernetes.
Essential Exp: Java 11/17, Springboot, REST API's, Microservices, Kubernetes.
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Technical Architect, Azure
Technical Architect, Azure
ARC IT Recruitment Ltd
The City, City of London (EC3), EC3M 5BN
Up to £95,000 per annum bonus + benefits
Azure, API, PaaS * In-depth knowledge of Azure cloud services (PaaS, Containers, AKS, Logic Apps, API Management, Service Bus, Event Grid).
Azure, API, PaaS * In-depth knowledge of Azure cloud services (PaaS, Containers, AKS, Logic Apps, API Management, Service Bus, Event Grid).
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Senior Backend Engineer
Senior Backend Engineer
Plexus Resource Solutions Ltd
City of London (EC1)
From £60,000 to £100,000 per annum
Use Rest API with Python
Use Rest API with Python
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For this role I am looking for a Mid-Level Java Developer with 3yrs+ exp with Java 11/17, Spring MVC, REST API's, Microservices, AWS/GCP/Azure with some commercial experience of working with ReactJS.
For this role I am looking for a Mid-Level Java Developer with 3yrs+ exp with Java 11/17, Spring MVC, REST API's, Microservices, AWS/GCP/Azure with some commercial experience of working with ReactJS.
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automation Test Engineer
automation Test Engineer
TALENT INTERNATIONAL UK LTD
City of London (EC4V), EC4V
£440.00 - £450.00 per day
Micro-service architecture and API testing principles
Micro-service architecture and API testing principles
NEW
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Azure PaaS, Function Apps, Blob/Table Storage, Service Bus Topics, Azure Search and API Management
Azure PaaS, Function Apps, Blob/Table Storage, Service Bus Topics, Azure Search and API Management
FEATURED
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Expertise in system and API design, scalability, and performance tuning
Expertise in system and API design, scalability, and performance tuning
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Senior Systems Developer
Senior Systems Developer
Brockenhurst College
Balmerlawn, Brockenhurst (SO42), SO42 7ZE
£46790.00 to £49339.00 per year
Experience in database design, API development, and system integration.
Experience in database design, API development, and system integration.
PREMIUM
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Senior Full Stack Engineer
Senior Full Stack Engineer
McGregor Boyall Associates Limited
City of London (EC1)
£80000 - £120000 per annum + bonus
Strong knowledge of system design principles, scalable architecture patterns, and API design.
Strong knowledge of system design principles, scalable architecture patterns, and API design.
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Application Developer
Application Developer
Wise Employment – Plymouth
Marshgate Trading Estate, Maidenhead (SL6), SL6
Market related
PowerShell scripting, API development
PowerShell scripting, API development
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Experience building maintainable and testable code bases, including API design and unit testing techniques
Experience building maintainable and testable code bases, including API design and unit testing techniques
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Web API / WCF / Web Services (2+ years)
Web API / WCF / Web Services (2+ years)
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Integration & API Testing - proficiency with REST/OData service testing using tools like Postman or SoapUI
Integration & API Testing - proficiency with REST/OData service testing using tools like Postman or SoapUI
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Our client is developing a platform that streamlines operations and connectivity for firms in the alternative investments space through an API-driven architecture.
Our client is developing a platform that streamlines operations and connectivity for firms in the alternative investments space through an API-driven architecture.
Build, fine-tune, and evaluate LLM-based Q&A models using frameworks like AWS Bedrock, Langchain, HuggingFace Transformers or OpenAI API.
Build, fine-tune, and evaluate LLM-based Q&A models using frameworks like AWS Bedrock, Langchain, HuggingFace Transformers or OpenAI API.
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Understanding of cloud architectures, API-driven platforms, and financial data security standards.
Understanding of cloud architectures, API-driven platforms, and financial data security standards.