23 of 23 Permanent API Development Jobs in London

experience of different types of architectures and understanding of the tradeoffs between them. In this role, you'll be a senior contributor to the development and operation of our cutting-edge cloud-based platform. You should have a passion for both science and engineering, a proven ability to deliver … contribute to our mission! Responsibilities : As a Safe Intelligence Full Stack Software Engineer, you will: Engineering of Golang-based backend systems , focusing on API development and integration. Engineering on our TypeScript-based frontend systems , primarily utilizing React to craft intuitive and highly functional user interfaces. Productize and enhance ...

process flow diagrams, conducting time-motion studies, identifying bottlenecks and inefficiencies, and redesigning processes to be machine-readable and automation-ready using methodologies. Python Development - Strong proficiency in Python programming including object-oriented design, asynchronous programming, error handling, and writing clean, maintainable code. Experience with key libraries including Pandas … business process applications, configuring workflows, implementing business rules, managing records, and integrating Appian with external systems via REST APIs, web services, and connected systems. API Development & Integration - Proficient in designing and building RESTful APIs using FastAPI, Flask, or Django REST Framework for exposing AI models and automation services. ...

candidates have led enhancements, maintenance, or improvements of existing systems. This position is especially suitable for those with hands-on experience in financial system development or financial IT consulting. Employment Type: Full-time, Permanent Salary: £50k-£65k depending on experience Start Date: Negotiable Working Hours: Monday to Friday … Server • Propose and implement improvements or new functionalities for existing systems • Coordinate with internal and external stakeholders Financial Systems Developer Ideal Candidate: • Development experience with C#.NET (3+ years preferred) • Experience with SQL and database operations • Knowledge of financial systems or financial operations (e.g., payments, settlements, reporting) is a plus ...

databases infrastructure capabilities work. • Expertise in infrastructure components, performance tuning, and capacity planning. • Understanding of, and hands on experience of, micro services, software development, infrastructure automation, api development and basic application system's design. • Strong understanding experience on Site Reliability Engineering, DevOps Capabilities (CI/CD/ ...

healthcare pioneer, operating from the UK with fully remote and flexible work options. You'll play a critical role in a cloud-first, API-led platform, contributing 60% of your time to coding and 40% to design and exploring new tech to solve real problems.What you'll do Build … functional needs Tackle complex problems and contribute fresh ideas on technology and direction Essential skills 5+ years of Java engineering experience Strong backend development with Java, including API development Experience in a cloud-based environment: provisioning, deploying, and monitoring applications Commitment to quality, clean code ...

Laravel/PHP (10.x/8.1 +) and MySQL An expert with APIs, data, transformations and calculations Strong experience with data optimisation: ETL System Development (Extract, Transform, Load) API development and integrations Data analytics TDD - phpunit/pest SOLID Design Principles Experienced with Cloud Infrastructure (AWS preferred ...

networking and compliance. Collaborate with Agile teams to deliver high-quality, secure software at scale. Key Skills: Strong Node.js/NestJS and REST API development experience. Skilled in AWS Build and evolve backend services that support login, MFA, and client authentication Proficient with IaC, CI/CD (CloudFormation ...

What You'll Work On You'll be developing robust, secure, and efficient services using modern Java frameworks and tooling. Expect to contribute to API development, containerised applications, and cross-functional engineering initiatives. Must-Have Skills Strong commercial experience with Java Hands-on expertise with RESTful APIs Proficiency ...

focus on backend Python and TypeScript and some React work on the front end. You'll take ownership and work across the full development lifecycle, collaborating with customers to build and scale the product. The work is interesting and complex, you'll be able to contribute to the product … London office (close to Waterloo) with flexibility to work from home twice a week. About you: You have strong backend Python coding skills, including API development You have full stack experience, including TypeScript and React (or another framework) You have a good understanding of system design and scalability ...

focus on backend Python and TypeScript and some React work on the front end. You'll take ownership and work across the full development lifecycle, collaborating with customers to build and scale the product. The work is interesting and complex, you'll be able to contribute to the product … London office (close to Waterloo) with flexibility to work from home twice a week. About you: You have strong backend Python coding skills, including API development You have full stack experience, including TypeScript and React (or another framework) You have a good understanding of system design and scalability ...

earning substantial bonuses. What's in it for you: Salary to £90k Bonus paid every six months based on personal performance (10-25%) Professional development Pension Health Insurance Gym membership Social events, free fruit, snacks, coffee etc. Your role: As a Backend Software Engineer within the trading engine team … team on Greenfield projects which you'll take ownership of and will see the business impact of. There's a focus on backend and API development although you'll also have elements of front end work with JavaScript and React.js. Location: You'll be based in plush City ...

Storage, Pub/Sub, and orchestrating workflows with Composer or Vertex Pipelines. Domain Knowledge: Understanding of sports-specific data types ( event, tracking, scouting, video ) API Development: Experience building data-centric APIs using FastAPI , especially in serverless environments (e.g., Google App Engine) Streaming Data: Familiarity with real-time data ...

researchers, and founders. Freedom to experiment with state-of-the-art models, tools, and frameworks. Modern tech stack (Python, LangChain, Hugging Face, OpenAI API, Pinecone, Kubernetes, etc.). Flexible working — remote-first culture with in-person team sessions for collaboration. Career acceleration — opportunities to own projects, lead development … Data Pipelines, Prompt Engineering, Model Fine-Tuning, Cloud Computing, AWS, Azure, Google Cloud, AI Infrastructure, Transformers, Reinforcement Learning, Vector Databases, Pinecone, Weaviate, Semantic Search, API Development, AI Deployment, Model Serving, AI Automation, Early Stage Startup, AI Startups, Tech Startup, Machine Intelligence, Applied AI, AI Applications, AI Innovation ...

flexible environment for an experienced technical leader. As Head of Engineering, you'll guide a talented, fast-moving team building a cloud-native, API-driven platform that's transforming global healthcare. This is a rare opportunity to remain hands-on in Java code (around 20%) while shaping engineering direction … platform. Collaborate with product leadership to design and implement solutions that align to business goals and customer needs. Drive engineering excellence through modern development practicesclean code, TDD, automation, and cloud-native deployment. Introduce and evaluate emerging technologies that strengthen the platform's reliability and innovation. Essential skills Proven experience ...

that data remains fresh and accurate. You’ll work with high volumes of script processing, collaborate on middleware integrations (ideally AMPS), and contribute to API development using FastAPI. You’ll also support deployments on Unix/Linux, OpenShift, Docker, and Kubernetes, while writing unit tests and documenting tasks … Jira. Occasionally, you may assist with front-end components using React. Must-Haves 4+ years of Python development experience. Strong understanding of monitoring platforms and scripting. Ability to schedule scripts and ensure data integrity. Proficiency in: JSON and data manipulation React REST APIs, FastAPI Unix/Linux OpenShift, Docker ...

Collaboration style - You work well with others but are equally effective independently Nice to Have: Experience with modern frontend frameworks (React, etc) Background in API development or distributed systems For more information, please apply! *Please note that this role will not be able to provide sponsorship support. Research ...

Experience: 8+ years Job Summary : We are seeking a highly skilled and experienced Senior Data Engineer to join our team and contribute to the development and maintenance of our cutting-edge Azure Databricks platform for economic data. This platform is critical for our Monetary Analysis, Forecasting, and Modelling activities. … strong understanding of data engineering principles, big data technologies, cloud computing (specifically Azure), and experience working with large datasets. Key Responsibilities : Data Pipeline Development & Optimisation : Design, develop, and maintain robust and scalable data pipelines for ingesting, transforming, and loading data from various sources (e.g., APIs, databases, financial data providers ...

design patterns and principles, including SOLID Strong understanding of automated testing practices Expertise in performant MySQL and relational database design Hands-on experience with API design and development Comfortable using modern tooling, including Docker, Git, PHPStan, PHPUnit and CI/CD Experience in Symfony Familiarity with cloud services … setup - we'll provide the right equipment to get you started. Beautiful collaborative office space - with places to eat, shop and relax. £500 personal development budget each year for training, events, or certifications. Summer and Winter team days - recent outings include spa days, archery, clay pigeon shooting, pottery ...

Skills and Experience Essential Strong communication skills with both stakeholders and technical engineers. Advanced React experience using TypeScript. Strong Node.js knowledge for service and API development. Solid testing experience covering code quality, security, customer journeys, and accessibility. Excellent knowledge of writing semantic, accessible, and modular front-end code. Experience … integrating with services via RESTful APIs. Experience with agile software development methodologies. Practical experience setting up and running CI/CD pipelines. Experience working with cloud platform services. Familiarity with Storybook, atomic design principles, and design language systems. Desirable Knowledge of Azure cloud platform services. Experience working with monorepo ...

aligned with business goals. What They Are Looking For Degree in Computer Science, Information Systems, or related field. Minimum 3 years' experience in software development, with strong skills in SharePoint, SQL Server, and the .NET environment. Proficiency in C#, ASP.NET MVC/Core, and web API development. Experience … with front-end frameworks and modern development practices. Strong problem-solving skills and ability to manage multiple projects. Excellent communication and collaboration skills. Why Apply? This is a fantastic opportunity to join a prestigious global organization that values innovation and offers a collaborative, forward-thinking environment. You'll work ...

Enhanced paid sick leave and paid family leave provisions- Eye care and winter flu jabs vouchers- Cycle to work scheme- Investing in your professional development with ongoing quality training and career development opportunitiesThis is a brilliant opportunity for a talented software engineer who’s confident working with Node.js … 59.Other organisations may call this role Software Engineer, Software Developer, Back-End Software Engineer, Server-Side Developer, Full Stack Developer, or API Developer. Our commitment to Equality, Diversity & Inclusion: We are happy to consider any reasonable adjustments that candidates may need during the recruitment process, and you will ...

Enhanced paid sick leave and paid family leave provisions - Eye care and winter flu jabs vouchers - Cycle to work scheme - Investing in your professional development with ongoing quality training and career development opportunities This is a brilliant opportunity for a talented software engineer whos confident working with Node.js … 59. Other organisations may call this role Software Engineer, Software Developer, Back-End Software Engineer, Server-Side Developer, Full Stack Developer, or API Developer. Our commitment to Equality, Diversity & Inclusion: We are happy to consider any reasonable adjustments that candidates may need during the recruitment process, and you will ...

schedule and that data remains fresh and accurate. You’ll work with high volumes of script processing, collaborate on middleware integrations, and contribute to API development. You’ll also support deployments while writing unit tests and documenting tasks in Jira. Occasionally, you may assist with front-end components using … would require you to be on-site 5 days a week (Monday - Friday) out of the office in London. Must-Haves: Strong Python development experience Strong understanding of monitoring platforms and scripting Demonstrated data manipulation skills; ensuring data integrity Experience with middleware tools, preferably AMPS Proficiency in JSON, React ...