201 to 225 of 269 API Development Jobs in the UK

C# Backend Developer

Hiring Organisation
Quant Capital
Location
London, United Kingdom
Salary
£ 80 K
Tech: C#, concurrent .NET code,TCP/IP and websockets, SQLChallenge: Greenfield Trading platform, API development, industry specific challengesFirm: Well-known Commodity Trading Software Firm, City of London, 40 man flat Dev TeamPay: 85k, 20% Bonus- 750 training budget, Pension, Life/Health, Some Flex WorkingC# Backend Developer … FintechQuant is urgently looking for a junior and senior C# Software Engineer to join our high profile client.Current challenges greenfield trading platform development and Integration to other platformsOur client is a well known commodity trading platform.The environment is that of Facebook or Google, relaxed open with time to think ...

C# Developer – Buckinghamshire

Hiring Organisation
Quant Capital
Location
London, United Kingdom
Salary
£ 80 K
Tech: .C#, WPF DeveloperChallenge: Greenfield Automated Data platform, API development, industry specific challengesFirm: Well-known digital racing solutions, Buckingham 20 man flat Dev TeamPay: 50k, Benefits, Remote WorkingC# Developer RacingQuant Capital is urgently looking for a C# Developer to join our high profile client.My client is a rapidly … have any thought process.My client is based in BuckinghamCommutable fromMilton Keynes, London, Banbury, Oxford, Birmingham, St AlbansGreenfield. C# Lead Software Developer, .Net Senior Developer, Development Lead, Technical Lead, Lead Application Developer Fullstack (web technologies, HTML, JQuery, AngularJS, SQL Server, C#, API ...

Director Solution Specialist - Media Solutions

Hiring Organisation
Hackajob Ltd
Location
South West London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£90,000
ability to analyze business processes and workflows, with a knack for identifying efficiency improvements Interest in learning or experience with Spark, SQL, Python for API development is highly encouraged, but not required Excellent communication and interpersonal skills, with the ability to engage effectively with both technical … closely with product and technical teams to understand architecture, capabilities, and integration across Moody's offerings Act as a bridge between clients and product development teams, conveying feedback to support product enhancements and roadmap discussions This position offers a dynamic work environment, requiring up to 50% travel to engage ...

Director Solution Specialist - Media Solutions

Hiring Organisation
17918
Location
Westminster, West End, United Kingdom
ability to analyze business processes and workflows, with a knack for identifying efficiency improvements Interest in learning or experience with Spark, SQL, Python for API development is highly encouraged, but not required Excellent communication and interpersonal skills, with the ability to engage effectively with both technical … closely with product and technical teams to understand architecture, capabilities, and integration across Moody's offerings Act as a bridge between clients and product development teams, conveying feedback to support product enhancements and roadmap discussions This position offers a dynamic work environment, requiring up to 50% travel to engage ...

Junior C# Developer – Fintech

Hiring Organisation
Quant Capital
Location
London, United Kingdom
Salary
£ 70 K
Developer – FintechTo 60,000Quant is urgently looking for a Junior C# Software Engineer to join our high profile client.Current challenges greenfield trading platform development and Integration to other platforms Our client is a well known Prop Trading Business.The environment is that of Facebook or Google, relaxed open with time … will require your skills in multithreading, concurrency, performance profiling and optimization. We are looking for potential not experience.You will be responsible for the full development lifecycle, where you will get a lot of freedom to decide on code base, technology and architecture. The more knowledge you gain about ...

Full Stack JavaScript Developer

Hiring Organisation
Quant Capital
Location
London, United Kingdom
Salary
£ 80 K
working on a high demand website and have a key role with the Managing Director’s ear. There will certainly be exposure to API development, as well as front end work using React.The successful candidate also has the chance to transition between web and mobile app development.Required, desirable … MySQLExposure to NativeScript or React NativeAngular (v4+)Ideally we are looking for a bright junior to mid-level developer with good fundamentals in software development and the ability to learn fast.You must be hands on and have strong experience in the stack but not always in time served.You will ...

ITap Group Developer Vacancy – Full Stack Engineer

Hiring Organisation
Quant Capital
Location
London, United Kingdom
Salary
£ 80 K
working on a high demand website and have a key role with the Managing Director’s ear. There will certainly be exposure to API development, as well as front end work using React.The successful candidate also has the chance to transition between web and mobile app development.Required, desirable … Angular (v4+) Nice to havePHP AngularJS (1.x)Ideally we are looking for a bright junior to mid-level developer with good fundamentals in software development and the ability to learn fast.You must be hands on and have strong experience in the stack but not always in time served. ...

C# Web Developer Fintech- Hastings

Hiring Organisation
Quant Capital
Location
London, United Kingdom
Salary
£ 100 K
Tech: C# HTML5, Javascript, SQL, JQuery, GET Angular Challenge: Greenfield Investment platform, API development, industry specific challenges Firm: Fintech50 residential property peer to peer loans, Borough, 6 man flat Dev Team Pay: 45k, Bonus- 750 training budget, Pension, Life/Health, Flex/Home WorkingC# Web Developer FintechQuant … quiet, friendly environment with break-out rooms for planning and discussion.My client is based in Hastings VB.NET, C#, MVC 5 Entity Framework, Web API, Design Patterns ...

Junior CTO / Full Stack JavaScript Developer

Hiring Organisation
Quant Capital
Location
London, United Kingdom
Salary
> £ 150 K
will be working on a high demand website and have a key role with the CEO’s ear. There will certainly be exposure to API development, as well as front end work using React.Managing outsourcing.Required, desirable and nice to have skills and exposure (the below also gives ...

NextGen IAM Engineer: Cloud-Native & API-Driven

Hiring Organisation
Jobleads-UK
Location
Sheffield, England, United Kingdom
Resources seeks an Engineer, NextGen IAM to join a large enterprise tech environment in Sheffield. The role focuses on cloud-native identity services, API development and secure integrations with enterprise platforms. The candidate will implement authentication, authorisation and federation, develop IaC and participate in CI/CD, testing … automation efforts across development, testing and production environments. #J-18808-Ljbffr ...

Systems Engineer - Windows

Hiring Organisation
Hudson River Trading
Location
London, United Kingdom
Salary
£ 80 K
similar configuration-as-code tool) to manage a fleet of Windows devicesProven ability to provision Microsoft Azure resources with TerraformProficiency with Microsoft Graph API developmentExperience developing scripts and tools using PowerShellFamiliarity with Microsoft Intune, Autopilot, Entra ID, and Active DirectoryA general design approach that incorporates security best practices, business ...

Principal Engineer

Hiring Organisation
Verisk Analytics
Location
London, United Kingdom
Salary
£ 80 K
such as Azure or AWSExperience developing and deploying microservices-based applicationsStrong understanding of high-availability, scalability, and performance optimization conceptsExperience working within Agile software development environmentsNice to haveExperience with Swift and the Vapor framework for server-side API developmentExperience building APIs with technologies such as C# or JavaExperience … growth, technical leadership, and long-term career developmentJoin a stable, global organization investing heavily in modern technology and platform transformation#LI-KS1#HybridLead the design and development of large-scale software solutions that support critical business capabilitiesShape technical architecture and engineering standards across multiple products and teamsBuild modern, cloud-native applications ...

Engineering Manager

Hiring Organisation
Adele Carr Recruitment Limited
Location
Manchester, Lancashire, United Kingdom
Employment Type
Full-Time
Salary
£80,000 - £85,000 per annum
suited to an experienced Lead Developer, Technical Lead or Engineering Manager who enjoys developing people, solving complex technical problems and contributing directly to the development of modern software products. You will lead a team of Software Engineers, provide technical direction and work closely with Product, Architecture and other stakeholders … high-quality solutions. What you'll be doing Lead, coach and support a team of Software Engineers through regular one-to-ones, feedback and development planning. Remain hands-on, contributing to software design, coding, testing and technical problem-solving. Provide technical leadership across applications built using Java and modern ...

Senior Backend Engineer

Hiring Organisation
Teya Solutions
Location
London, United Kingdom
Salary
£ 80 K
code to support critical business needs, ensuring scalability, performance, and reliability across Teya's systems.Take ownership of features and projects throughout the full software development lifecycle, including scoping, design, development, testing, deployment, and maintenance.Collaborate closely with cross-functional teams (including product, design, data science, security, and operations … reliability, and scalability of products across the business.Contribute to process improvements, focusing on continuous integration, delivery, and deployment to ensure a smooth and stable development pipeline.Participate in code reviews, share feedback constructively, and help elevate the overall quality and performance of the team’s output.Mentor and support fellow developers ...

C# Backend Developer Fintech

Hiring Organisation
Quant Capital
Location
London, United Kingdom
Salary
£ 100 K
Tech: C#, concurrent .NET code,TCP/IP and websockets, SQLChallenge: Greenfield Trading platform, API development, industry specific challengesFirm: Well-known Commodity Trading Software Firm, City of London, 40 man flat Dev TeamPay: 80k, 20% Bonus- 750 training budget, Pension, Life/Health, Some Flex WorkingC# Backend Developer … FintechQuant is urgently looking for a junior and senior C# Software Engineer to join our high profile client.Current challenges greenfield trading platform development and Integration to other platformsOur client is a well known commodity trading platform.The environment is that of Facebook or Google, relaxed open with time to think ...

Blockchain Engineers

Hiring Organisation
Fuel Recruitment
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 800 Daily
blockchain platforms such as Canton and Ethereum. Working in a cloud native environment (GCP) with a good Back End Java Back End app development and building resilient, scalable, high performing enterprise applications. Expertise in messaging and event driven architecture, API development, Microservices and performance optimisation. The roles ...

Python Django Developer

Hiring Organisation
Quant Capital
Location
London, United Kingdom
Salary
£ 80 K
Django Developer Times Fastest Growing Quant Capital is urgently looking for a Python Django Developer to join our high profile client in their main development team.Our client is a small but well known big data property software business, disrupting a well established market.The Python Developer will join an innovative … their product will be the enterprise-grade technology platform written in Python and Twisted with a Django frontend. This is a unique green field development opportunity that will allow you to play a part in shaping the future of social data and be rewarded accordingly.On ...

Sr. Ad Tech Consultant, Ad Tech Solutions (ATS)

Hiring Organisation
Amazon
Location
London, United Kingdom
Salary
£ 80 K
Spain and Italy. You will help customers to achieve their business outcomes by solving technical challenges related to conversion tracking, first party data uploads, API development, AMC SQL query customization, and building custom audiences. You will work closely with our Ad Tech Account Executives to accelerate customer adoption … Experience designing and implementing cloud-based solutions (AWS or equivalent) or on-premise integrations- Experience with integration, testing and automation experience- Experience in software development using object-oriented programming languagesAmazon is an equal opportunities employer. We believe passionately that employing a diverse workforce is central to our success. ...

Frontline AI Engineer - Deploy & Scale Agentic Systems

Hiring Organisation
Jobleads-UK
Location
Crawley, England, United Kingdom
prem, hybrid and restricted environments. You will design production architectures for agentic AI, LLM and vision‐language apps. The role requires strong Python, API development, Docker, cloud deployments, and secure, observable production systems. You will build connectors, CI/CD, monitoring, and ensure reliability, performance and cost efficiency ...

Senior PHP & API Engineer — Modernize & Innovate

Hiring Organisation
Jobleads-UK
Location
Twyford, England, United Kingdom
join our team and help modernise our Brightlime CRM platform and broader tech stack. This hands-on role focuses on PHP, MySQL and robust API development across legacy systems and modern components. You will design and support RESTful APIs, integrate third-party services and ensure reliable data exchange ...

Full Stack Engineer- London

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
engineering team delivering strategic lending and banking technology initiatives. This role requires a hands‐on engineer with strong experience across modern Java backend development, React-based front-end technologies, cloud‐native engineering, and microservices architecture. The successful candidate will contribute across the full software development lifecycle, working within … microservices using Java and Spring Boot. Develop responsive front-end solutions using React and/or React Native. Contribute to cloud-native application development on AWS. Implement secure coding standards and engineering best practices. Develop automated testing and integration solutions. Participate in CI/CD pipeline development ...

Senior Full Stack Developer

Hiring Organisation
Anson Mccade
Location
Leeds, West Yorkshire, Yorkshire, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£70,000
organisations, building resilient cloud-native applications that serve thousands of users. This is an opportunity to join a business renowned for engineering quality, modern development practices and a strong focus on continuous improvement. The Role Build and deliver enterprise-scale applications using Kotlin and modern JVM technologies. Help shape … knowledge of Java and the wider JVM ecosystem. Experience building backend solutions using Spring Boot and related frameworks. Strong understanding of microservices architecture and API development. Experience working with cloud platforms such as AWS, Azure or GCP . Exposure to containerisation technologies including Docker and Kubernetes . Experience with ...

Software Engineer

Hiring Organisation
Jobleads-UK
Location
Milton Keynes, England, United Kingdom
code quality through TDD, CI/CD, and Agile principles. Contributing to cloud-based solutions on AWS/Azure, using Kubernetes, Docker, and API development. Main Skills Needed Strong experience with C# and .Net Core in a professional setting. Familiarity with front-end frameworks such as Typescript and React … desirable). Experience with Web API, Kubernetes/Docker, and cloud platforms like AWS or Azure. Knowledge of SQL and NoSQL databases, with an understanding of REST, SOLID principles, and TDD. Good communication skills and effective team collaboration within an Agile/Scrum environment. What ...

.NET Cloud Migration Engineer - AWS/API

Hiring Organisation
Jobleads-UK
Location
City of Westminster, England, United Kingdom
travel to the City office three times per week; this role is outside IR35 and pays £500-£550 per day. Experience with AWS and API development is desirable. #J-18808-Ljbffr ...

Senior IT Engineer (AI)

Hiring Organisation
Iterable
Location
London, United Kingdom
Salary
£ 80 K
value applicants for the skills they bring beyond a job description.ResponsibilitiesIntegration & Automation: Design and build integrations between AI platforms and corporate business systems, including API development and workflow automation.AI Operationalization: Evaluate and operationalize AI tools as the company's needs evolve—starting with Gemini Enterprise.Cloud Resource Management: Manage … into building with AI tools.Technical Communication: Ability to communicate clearly with both technical and non-technical colleagues.Operational Mindset: Demonstrated ability to manage both creative development and steady-state operational tasks.Additional (Preferred)Familiarity with Terraform or other infrastructure-as-code tools.Experience with enterprise integrations involving Salesforce, Snowflake, or HRIS systems.Familiarity ...