135 api developer jobs found

Mindrift is looking for skilled Full-Stack Web App Developers (JavaScript/TypeScript + Python or Node) to join the Tendem project (https://tendem.ai/) and build interactive browser-based applications for real-world use cases. In this role, you 'll apply your full-stack engineering expertise to design, build, and maintain functional, robust, and user-friendly web applications. This part-time remote opportunity is ideal for professionals with hands-on experience in modern frontend frameworks, backend APIs, databases, and shipping interactive web products end-to-end.   What We Do The Mindrift platform connects specialists with innovative technology projects. Our mission is to help develop high-quality AI technologies by combining real-world expertise from professionals across the globe with advanced AI development efforts.   About the Role This is a freelance role for a Tendem project. As a Full-Stack Web App Developer, you 'll design, build, and refine...

Mindrift is looking for skilled Full-Stack Web App Developers (JavaScript/TypeScript + Python or Node) to join the Tendem project (https://tendem.ai/) and build interactive browser-based applications for real-world use cases. In this role, you 'll apply your full-stack engineering expertise to design, build, and maintain functional, robust, and user-friendly web applications. This part-time remote opportunity is ideal for professionals with hands-on experience in modern frontend frameworks, backend APIs, databases, and shipping interactive web products end-to-end.   What We Do The Mindrift platform connects specialists with innovative technology projects. Our mission is to help develop high-quality AI technologies by combining real-world expertise from professionals across the globe with advanced AI development efforts.   About the Role This is a freelance role for a Tendem project. As a Full-Stack Web App Developer, you 'll design, build, and refine...

Mindrift is looking for skilled Full-Stack Web App Developers (JavaScript/TypeScript + Python or Node) to join the Tendem project (https://tendem.ai/) and build interactive browser-based applications for real-world use cases. In this role, you 'll apply your full-stack engineering expertise to design, build, and maintain functional, robust, and user-friendly web applications. This part-time remote opportunity is ideal for professionals with hands-on experience in modern frontend frameworks, backend APIs, databases, and shipping interactive web products end-to-end.   What We Do The Mindrift platform connects specialists with innovative technology projects. Our mission is to help develop high-quality AI technologies by combining real-world expertise from professionals across the globe with advanced AI development efforts.   About the Role This is a freelance role for a Tendem project. As a Full-Stack Web App Developer, you 'll design, build, and refine...

Senior Front-End React Developer At Bridebook, we're digitising the wedding industry! Join us in transforming the wedding planning experience for engaged couples around the world. Full-time Contractor · Remote · Competitive Day Rate Who is Bridebook anyway? Bridebook is a revolutionary wedding planning platform that seeks to make wedding planning an enjoyable, intuitive, and rewarding experience for couples, guests, and industry partners. Launched in the UK, Bridebook has over 1,000,000 planning couples and has been featured in major outlets such as the New York Times, the BBC, and the App Store. After seven years and many iterations later, we have 2 in 3 engaged UK couples and 1 in 3 engaged German couples using Bridebook, and have recently expanded into the French and Irish markets. While we serve a very emotional and creative industry, we are disrupting the wedding industry by leveraging cutting-edge technology to provide seamless and...

Front-end Developer (8 Month Day Rate Contactor) Contract Type Day Rate Contractor Closing Date 31 August, 2026 Job Category Tech, Data and Digital Business Unit Systems and Infrastructure (UKT) Location London , United Kingdom Posted on 20 August, 2026 The opportunity  As a Front-End Developer you will be responsible for: Build, test and document applications, using an internally developed JavaScript / React based framework and associated utility classes Operate in an Agile/Scrum environment to produce high quality, clean, testable and maintainable code Lead / participate in Show and Tell sessions with Business and Technical Stakeholders Ensure knowledge transfer to the wider Front End / UI Development Team Act as the Front-End SME within the designated delivery team Operates in line with the Bank's Risk Management framework (including sub-frameworks) and relevant risk and compliance policies and procedures,...

Senior Java Developer (6 month contract) Full job description First Derivative is driven by people, data, and technology, unlocking the value of insight, hindsight, and foresight to drive organizations forward. Counting many of the world's leading investment banks as clients, we help our clients navigate the data-driven, digital revolution that is transforming the financial services sector. Our global teams span across 15 offices serving clients across EMEA, North America and APAC. As an EPAM Systems, Inc. (NYSE: EPAM) company, a leading global provider of digital platform engineering and development services, we deliver advanced financial services solutions by empowering operational insights, driving innovation, and enabling more effective risk management in an increasingly data-centric world. Together with EPAM, we combine deep industry expertise with cutting-edge technology to help clients stay ahead in a rapidly evolving financial landscape, offering...

Date Opened 19/08/2026 Job Type Contract About Scrumconnect Consulting Scrumconnect Consulting is a multi-award-winning UK public sector digital consultancy, positively influencing the lives of over forty million UK citizens. We bring deep expertise in agile delivery, digital transformation, and platform engineering across central government. With a team of over one hundred and twenty-five professionals - more than forty percent of whom are women - we are committed to building inclusive, diverse teams that reflect the communities we serve. Overview of the Work This work package is divided into distinct deliverables that will enhance and modernise existing services. Each deliverable is timeboxed to maintain agile and iterative working while ensuring measurable outcomes. The Lead D365 Developer will work as part of a blended team alongside civil servants from DfE's Solutions Development Team (SDT) and Education Estates. The role will involve...

We are seeking a Backend Java Software Engineer to join our team on a contractual basis. This role heavily focuses on Java, Backend, iGaming Operator Integrations.   This is 1 year extendable contract and applicants must operate through a fully registered limited company to be considered for this role. The role is fully remote, with occasional travel required to our headquarters in Málaga, Spain   What You’ll Do Design, develop and maintain scalable, resilient backend services using Java (17+) and Spring Boot, with a strong focus on quality and a zero-defect mindset. Build and evolve integrations between our iGaming platform and operators, aggregators and other external partners. Design and implement robust REST APIs, asynchronous integrations and event-driven services supporting high-volume, real-time gaming transactions. Develop and maintain common platform capabilities supporting operator integration,...

Mindrift is looking for skilled Bot Developers (WhatsApp Business API, Telegram Bot API, Discord API) to join the Tendem project (https://tendem.ai/) and build conversational bots and messaging-platform integrations for real-world applications. In this role, you 'll use your bot engineering expertise, conversational design skills, and quality-focused approach to build reliable, useful bots and messaging integrations that deliver a great user experience. This part-time remote opportunity is ideal for professionals with hands-on experience building messaging bots, working with platform APIs and webhooks, and implementing conversational logic.   What We Do The Mindrift platform connects specialists with innovative technology projects. Our mission is to help develop high-quality AI technologies by combining real-world expertise from professionals across the globe with advanced AI development efforts.   About the Role This is a freelance role for a Tendem...

Network Rail is at the heart of revitalising Britain's railway. From Crossrail - Europe's largest civil engineering project - to investment in world-class stations and major programmes of electrification, we are involved in some of the most ambitious and diverse ventures that this country has ever seen. We at Network Rail are dedicated to becoming one of Britain 's best employers and believe this starts with placing the candidate at the heart of everything we do!   As a  Agentic Automation Engineer , your main responsibilities will be:   We 're looking for an Agentic Automation Engineer to help shape and deliver the next generation of AI-driven automation across the rail industry. This is not a traditional Power Platform Developer role. We 're seeking someone with hands-on experience building AI agents and agentic solutions , primarily within the Microsoft Agentic AI ecosystem , leveraging low-code technologies to design, orchestrate and deploy...

Network Rail is at the heart of revitalising Britain's railway. From Crossrail - Europe's largest civil engineering project - to investment in world-class stations and major programmes of electrification, we are involved in some of the most ambitious and diverse ventures that this country has ever seen. We at Network Rail are dedicated to becoming one of Britain 's best employers and believe this starts with placing the candidate at the heart of everything we do!   As a  Agentic Automation Engineer , your main responsibilities will be:   We 're looking for an Agentic Automation Engineer to help shape and deliver the next generation of AI-driven automation across the rail industry. This is not a traditional Power Platform Developer role. We 're seeking someone with hands-on experience building AI agents and agentic solutions , primarily within the Microsoft Agentic AI ecosystem , leveraging low-code technologies to design, orchestrate and deploy...

Salary £400-£425 Outside Ir35 City Taunton Province Somerset Country United Kingdom Postal Code TA1 Job Description   About Scrumconnect Consulting   Scrumconnect Consulting is a multi-award-winning digital consultancy, recognised for delivering impactful and innovative technology solutions across UK government departments. Our work has positively influenced the lives of over 40 million UK citizens. We are passionate about user-centred design, agile delivery, and building digital services that make a real difference. Our teams work at the forefront of innovation, helping organisations transform and deliver high-quality, scalable solutions that truly matter.   Role Purpose Join a blended agile delivery squad working on large-scale, secure digital services for a government client. As a Senior Developer, you will bring strong hands-on experience across both .NET and Python, contributing to...

Salary £450-£500 Outside IR35 City Taunton Province Somerset Country United Kingdom Postal Code TA1 Job Description About Scrumconnect Consulting   Scrumconnect Consulting is a multi-award-winning digital consultancy, recognised for delivering impactful and innovative technology solutions across UK government departments. Our work has positively influenced the lives of over 40 million UK citizens.   We are passionate about user-centred design, agile delivery, and building digital services that make a real difference. Our teams work at the forefront of innovation, helping organisations transform and deliver high-quality, scalable solutions that truly matter.   Overview We are seeking an experienced Lead Technical Developer to provide hands-on technical leadership within a client delivery team. You will be responsible for driving engineering standards, code quality, and the technical...

Skills & Experience Job roles: Back End Experience level: Lead Core skills considered: APIs, REST, SOAP, JSON, SQL Other skills considered: Java, Groovy, CI/CD, AWS, Azure Logistics Base salary: Undisclosed Employment type: Freelance/Contract Remote working: Hybrid Visa sponsorship: Not available Job Description We are looking for a hands-on Boomi Integration Architect who can design scalable integration solutions while leading development and delivery. The role combines architecture, technical leadership, client engagement and hands-on Boomi development. Key Responsibilities Design enterprise integration solutions using the Boomi platform. Lead discovery, requirements and solution-design sessions. Build and review complex Boomi integration processes. Develop reusable APIs, components and integration frameworks....

Skills & Experience Job roles: Back End Experience level: Mid, Senior Core skills considered: APIs, REST, SOAP, SQL, Java Other skills considered: Groovy, CI/CD, AWS, Azure Logistics Base salary: Undisclosed Employment type: Freelance/Contract Remote working: Hybrid Visa sponsorship: Not available Job Description We are looking for an experienced Boomi Developer to design, build, test and support integration solutions using the Boomi Enterprise Platform. The role requires strong hands-on development skills across APIs, cloud applications, databases and enterprise systems. Key Responsibilities Develop and maintain integration processes using Boomi. Build integrations between cloud and on-premises applications. Configure Boomi connectors, maps, profiles, process properties and environment extensions. Develop REST,...

London, UK Apply CoreWeave is The Essential Cloud for AI™. Built for pioneers by pioneers, CoreWeave delivers a platform of technology, tools, and teams that enables innovators to build and scale AI with confidence. Trusted by leading AI labs, startups, and global enterprises, CoreWeave combines superior infrastructure performance with deep technical expertise to accelerate breakthroughs and turn compute into capability. Founded in 2017, CoreWeave became a publicly traded company (Nasdaq: CRWV) in March 2025. Learn more at  www.coreweave.com .   We're proud to be a Living Wage accredited Employer.   What You’ll Do: The Monolith AI Platform Engineering Team at CoreWeave  is responsible for transitioning existing client environments to Monolith AI’s next-generation platform, maintaining the high velocity needed to support a rapidly growing customer base. This team works...

Senior Front-End React Developer At Bridebook, we're digitising the wedding industry! Join us in transforming the wedding planning experience for engaged couples around the world. Full-time Contractor · Remote · Competitive Day Rate Who is Bridebook anyway? Bridebook is a revolutionary wedding planning platform that seeks to make wedding planning an enjoyable, intuitive, and rewarding experience for couples, guests, and industry partners. Launched in the UK, Bridebook has over 1,000,000 planning couples and has been featured in major outlets such as the New York Times, the BBC, and the App Store. After seven years and many iterations later, we have 2 in 3 engaged UK couples and 1 in 3 engaged German couples using Bridebook, and have recently expanded into the French and Irish markets. While we serve a very emotional and creative industry, we are disrupting the wedding industry by leveraging cutting-edge technology to provide seamless and...

About the Role The Business Central Developer designs, customises and supports Microsoft Dynamics 365 Business Central solutions for our clients, working closely with Delivery Managers, Application Managers and functional teams. This is a contract engagement for a hands-on developer who can own extension development, integrations and Level 3 support end to end, and who brings Power Platform skills to extend BC-based workflows into Power Apps and Power Automate.   The Role Role purpose As Business Central Developer, you will design, build and support AL extensions and integrations across live client environments, working alongside Delivery Managers, Application Managers and functional consultants. You will turn business requirements into reliable, well-engineered BC solutions, extend that automation into the Power Platform where it adds value, and provide dependable Level 3 support across the engagements you own.   This is a hands-on...

Senior Umbraco .NET Developer Location: PSP IT, Spalding, Lincolnshire Employment Type: 6 month contract, possibly leading to permanent Working Pattern: Office-based, Hybrid may be considered for right applicant Department: Development About PSP IT PSP IT is a growing technology business specialising in digital transformation, bespoke software development, enterprise applications and the ongoing support and modernisation of business-critical systems. We work closely with our clients to understand their business challenges and deliver robust, scalable and effective technology solutions. As part of our continued growth, we are looking for an experienced Senior Umbraco Full Stack .NET Developer to join our Development team in Spalding. About the Role We are looking for an accomplished Full Stack .NET Developer with strong commercial experience of Umbraco CMS to take a senior role in the design, development and delivery of modern web applications,...

Senior Java Developer (6 month contract) Full job description First Derivative is driven by people, data, and technology, unlocking the value of insight, hindsight, and foresight to drive organizations forward. Counting many of the world's leading investment banks as clients, we help our clients navigate the data-driven, digital revolution that is transforming the financial services sector. Our global teams span across 15 offices serving clients across EMEA, North America and APAC. As an EPAM Systems, Inc. (NYSE: EPAM) company, a leading global provider of digital platform engineering and development services, we deliver advanced financial services solutions by empowering operational insights, driving innovation, and enabling more effective risk management in an increasingly data-centric world. Together with EPAM, we combine deep industry expertise with cutting-edge technology to help clients stay ahead in a rapidly evolving financial landscape, offering...