1 to 25 of 59 Permanent API Design Jobs in London

The Role As a Founding Backend Engineer, you'll be instrumental in shaping our technical infrastructure from the ground up. You'll take ownership of our existing product and design, build, and maintain the systems that power our next phase of growth, ensuring our platform is robust, secure, and scalable. This is a unique opportunity to make a significant … tools like Terraform to programmatically manage cloud resources. CI/CD Pipeline Management : Some experience setting up and maintaining automated testing and deployment workflows using GitHub Actions. Development and API Design Scaling Applications : Previous success scaling applications to handle growing user bases and increasing traffic loads. API Design : Strong knowledge of RESTful API design More ❯

The Role As a Founding Backend Engineer, you'll be instrumental in shaping our technical infrastructure from the ground up. You'll take ownership of our existing product and design, build, and maintain the systems that power our next phase of growth, ensuring our platform is robust, secure, and scalable. This is a unique opportunity to make a significant … tools like Terraform to programmatically manage cloud resources. CI/CD Pipeline Management : Some experience setting up and maintaining automated testing and deployment workflows using GitHub Actions. Development and API Design Scaling Applications : Previous success scaling applications to handle growing user bases and increasing traffic loads. API Design : Strong knowledge of RESTful API design More ❯

Overview: We are seeking a technically proficient Data Analyst to join our IT Department. This role will focus on API design and systems integrations , playing a vital part in enabling data-driven decision-making and ensuring seamless data exchange across internal and external platforms. Key Responsibilities: Design, document, and maintain APIs to facilitate secure and efficient data … BI, Azure Foundry, and Fabric . Ensure data quality, compliance, and governance across all integrations. Support automation efforts by embedding APIs into existing workflows. Work closely with vendors to design solutions aligned with architectural standards and best practices. Key Skills & Experience: Proven experience in a Data Analyst or similar technical role. Strong hands-on experience with RESTful API design , documentation (Swagger/OpenAPI), and testing tools (e.g. Postman). Proficiency in SQL and scripting languages such as Python or R . Solid understanding of data modelling, ETL processes , and system integration . Experience working with Azure and Microsoft data tools including Power BI , Azure Foundry , and Fabric . Excellent communication skills and ability to engage effectively More ❯

professional services organisation is looking for a technically proficient Data Analyst to join the IT Department within the Strategy & Architecture Team. This role will have a strong focus on API design and integrations between systems. This role is critical in enabling data-driven decision-making and ensuring seamless data exchange across internal systems and external platforms. Key Responsibilities … Analyse and interpret complex datasets to support IT operations and strategic initiatives. Design, document, and maintain APIs that facilitate secure and efficient integration of data between systems. Create data dictionaries that describe data structures, elements, their meanings, and relationships within a dataset or database. Create Business Glossary and describe business terms, and their definitions, ensuring they are consistent across … fields. Essential Requirements Demonstrated experience in data analysis within an IT or technical environment. Strong proficiency in SQL and Scripting languages including Python or R. Practical experience with RESTful API design, documentation (eg Swagger/OpenAPI), and testing tools (eg Postman). Working knowledge of cloud platforms (primarily Azure) and associated data services. Strong understanding of data modelling More ❯

# Mid-Level Full-Stack Engineer (React + Go)Remote - EMEA/EngineeringThe Tyk API Management platform is helping to drive the connected world and power new products and services. We're changing the way that organisations connect any number of their systems and services.Whether internal, external, public or highly encrypted systems, Tyk helps businesses drive value across the … telecoms, healthcare, or media industries (to name just a few!)If you've banked online, used an app to check the news, or perhaps even driven a connected car, API's, and by extension, Tyk, make that possible. Founded in 2015 with offices in London - UK, London - Ontario, Atlanta and Singapore, we have many thousands of users of our … a varied user base hailing from every continent - even Antarctica. Our MissionTyk is on a mission to connect every system in the world. We've started by building an API Management platform. Total flexibility, default remote, radical responsibility If this sounds like an environment that you believe could work for you then read on to find out more. The More ❯

up-within a startup-style venture backed by the strength and stability of an established business. Key Responsibilities End-to-end development of high-quality, scalable SaaS platforms from design through deployment and maintenance. Architect and implement robust backend services primarily using Python and PostgreSQL. Develop and maintain responsive, performant front-end applications with TypeScript and modern frameworks (e.g. … development productivity and platform capabilities. Provide technical mentorship and leadership to development teams, fostering best practices in coding, testing, and deployment. Participate in code reviews, architecture discussions, and system design decisions. Troubleshoot and resolve complex technical issues across the full stack. Ensure software security, scalability, and performance are maintained at all times. Keep abreast of emerging technologies and industry … Proven expertise in full-stack development using: TypeScript (and JavaScript frameworks such as NextJS, Node, or Tailwind) Python (including frameworks like Django, Flask, or FastAPI) PostgreSQL and relational database design, optimisation, and maintenance. AI Development Tools such as Windsurf, Aider or Augment. Demonstrable experience building and scaling SaaS platforms in a production environment. Strong understanding and practical application of More ❯

Senior API/PHP Developer – Fully Remote (UK) – £80,000+ Venchr is partnering with a fast-growing SaaS company that’s redefining financial management in the luxury and yachting sector. Their platform unites accounting, payments, FX, and project management into a single, powerful ecosystem — helping clients worldwide streamline complex operations with ease. They’re now seeking a Lead PHP … Developer with a strong focus on API architecture and backend systems to join their fully remote UK-based engineering team. In this role, you’ll take ownership of designing, developing, and optimizing APIs that power mission-critical services. You’ll collaborate closely with product, DevOps, and frontend teams to ensure the platform remains scalable, secure, and future-proof. Beyond … hands-on coding, you’ll play a key part in setting technical standards, mentoring other engineers, and driving forward the API and integration strategy that underpins the company’s growth. What You’ll Bring Proven experience leading backend/API development using PHP and Laravel Expertise in RESTful API design, versioning, authentication, and performance optimization Strong More ❯

Senior API/PHP Developer – Fully Remote (UK) – £80,000+ Venchr is partnering with a fast-growing SaaS company that’s redefining financial management in the luxury and yachting sector. Their platform unites accounting, payments, FX, and project management into a single, powerful ecosystem — helping clients worldwide streamline complex operations with ease. They’re now seeking a Lead PHP … Developer with a strong focus on API architecture and backend systems to join their fully remote UK-based engineering team. In this role, you’ll take ownership of designing, developing, and optimizing APIs that power mission-critical services. You’ll collaborate closely with product, DevOps, and frontend teams to ensure the platform remains scalable, secure, and future-proof. Beyond … hands-on coding, you’ll play a key part in setting technical standards, mentoring other engineers, and driving forward the API and integration strategy that underpins the company’s growth. What You’ll Bring Proven experience leading backend/API development using PHP and Laravel Expertise in RESTful API design, versioning, authentication, and performance optimization Strong More ❯

Senior API/PHP Developer – Fully Remote (UK) – £80,000+ Venchr is partnering with a fast-growing SaaS company that’s redefining financial management in the luxury and yachting sector. Their platform unites accounting, payments, FX, and project management into a single, powerful ecosystem — helping clients worldwide streamline complex operations with ease. They’re now seeking a Lead PHP … Developer with a strong focus on API architecture and backend systems to join their fully remote UK-based engineering team. In this role, you’ll take ownership of designing, developing, and optimizing APIs that power mission-critical services. You’ll collaborate closely with product, DevOps, and frontend teams to ensure the platform remains scalable, secure, and future-proof. Beyond … hands-on coding, you’ll play a key part in setting technical standards, mentoring other engineers, and driving forward the API and integration strategy that underpins the company’s growth. What You’ll Bring Proven experience leading backend/API development using PHP and Laravel Expertise in RESTful API design, versioning, authentication, and performance optimization Strong More ❯

Senior API/PHP Developer – Fully Remote (UK) – £80,000+ Venchr is partnering with a fast-growing SaaS company that’s redefining financial management in the luxury and yachting sector. Their platform unites accounting, payments, FX, and project management into a single, powerful ecosystem — helping clients worldwide streamline complex operations with ease. They’re now seeking a Lead PHP … Developer with a strong focus on API architecture and backend systems to join their fully remote UK-based engineering team. In this role, you’ll take ownership of designing, developing, and optimizing APIs that power mission-critical services. You’ll collaborate closely with product, DevOps, and frontend teams to ensure the platform remains scalable, secure, and future-proof. Beyond … hands-on coding, you’ll play a key part in setting technical standards, mentoring other engineers, and driving forward the API and integration strategy that underpins the company’s growth. What You’ll Bring Proven experience leading backend/API development using PHP and Laravel Expertise in RESTful API design, versioning, authentication, and performance optimization Strong More ❯

Senior API/PHP Developer – Fully Remote (UK) – £80,000+ Venchr is partnering with a fast-growing SaaS company that’s redefining financial management in the luxury and yachting sector. Their platform unites accounting, payments, FX, and project management into a single, powerful ecosystem — helping clients worldwide streamline complex operations with ease. They’re now seeking a Lead PHP … Developer with a strong focus on API architecture and backend systems to join their fully remote UK-based engineering team. In this role, you’ll take ownership of designing, developing, and optimizing APIs that power mission-critical services. You’ll collaborate closely with product, DevOps, and frontend teams to ensure the platform remains scalable, secure, and future-proof. Beyond … hands-on coding, you’ll play a key part in setting technical standards, mentoring other engineers, and driving forward the API and integration strategy that underpins the company’s growth. What You’ll Bring Proven experience leading backend/API development using PHP and Laravel Expertise in RESTful API design, versioning, authentication, and performance optimization Strong More ❯

Senior API/PHP Developer – Fully Remote (UK) – £80,000+ Venchr is partnering with a fast-growing SaaS company that’s redefining financial management in the luxury and yachting sector. Their platform unites accounting, payments, FX, and project management into a single, powerful ecosystem — helping clients worldwide streamline complex operations with ease. They’re now seeking a Lead PHP … Developer with a strong focus on API architecture and backend systems to join their fully remote UK-based engineering team. In this role, you’ll take ownership of designing, developing, and optimizing APIs that power mission-critical services. You’ll collaborate closely with product, DevOps, and frontend teams to ensure the platform remains scalable, secure, and future-proof. Beyond … hands-on coding, you’ll play a key part in setting technical standards, mentoring other engineers, and driving forward the API and integration strategy that underpins the company’s growth. What You’ll Bring Proven experience leading backend/API development using PHP and Laravel Expertise in RESTful API design, versioning, authentication, and performance optimization Strong More ❯

our Forward Deployed Engineering Team. You will serve as the crucial link between our advanced AI agents and the wider enterprise technology landscape. Your primary responsibility will be to design, build, and manage the integrations that enable our Agentforce agents to take meaningful, autonomous actions across various business systems. You will not only connect agents to systems but also … in connecting disparate systems and are excited by the challenge of enabling AI to act upon its insights, this role is for you. Your Impact System & Agent Integration Architecture: Design and implement robust, scalable, and secure integration patterns that connect Agentforce to a wide range of enterprise applications and enable communication between different AI agents. Multi-Agent Orchestration: Design … agents. Agent-to-Agent Communication (A2A): Develop and implement protocols and standards for inter-agent communication, enabling different AI agents to collaborate, share information, and hand off tasks effectively. API Development and Management: Develop, deploy, and maintain custom APIs (REST, SOAP) to facilitate seamless data exchange and action execution between Agentforce and other systems. Workflow Automation: Collaborate with business More ❯

Fullstack Engineer, you will be pivotal in both frontend and backend development, crafting responsive, scalable web applications. This role requires strong expertise across the stack — from UI/UX design principles to backend integrations. You will design and implement APIs using JavaScript, TypeScript, and React, ensuring seamless performance and scalability. We’re looking for a proactive and experienced … and enjoys leading complex projects from conception to delivery. You’ll be both a technical leader and a driver of innovation across the team. Key Responsibilities Data Pipeline Architecture Design and implement robust, scalable data pipelines. Optimise data flow between databases (MySQL, MongoDB) and applications. Fullstack Development Develop high-quality, scalable applications using Node.js, TypeScript, and React. Collaborate with … frameworks and state management libraries like Redux or Context API. Hands-on experience with cloud services (AWS or GCP), particularly for deploying and managing applications0. Strong understanding of RESTful API design (GraphQL experience a plus). Analytical mindset with the ability to design, optimise, and troubleshoot complex UIs and fullstack integrations. Excellent communication and leadership skills with More ❯

Fullstack Engineer, you will be pivotal in both frontend and backend development, crafting responsive, scalable web applications. This role requires strong expertise across the stack — from UI/UX design principles to backend integrations. You will design and implement APIs using JavaScript, TypeScript, and React, ensuring seamless performance and scalability. We’re looking for a proactive and experienced … and enjoys leading complex projects from conception to delivery. You’ll be both a technical leader and a driver of innovation across the team. Key Responsibilities Data Pipeline Architecture Design and implement robust, scalable data pipelines. Optimise data flow between databases (MySQL, MongoDB) and applications. Fullstack Development Develop high-quality, scalable applications using Node.js, TypeScript, and React. Collaborate with … frameworks and state management libraries like Redux or Context API. Hands-on experience with cloud services (AWS or GCP), particularly for deploying and managing applications0. Strong understanding of RESTful API design (GraphQL experience a plus). Analytical mindset with the ability to design, optimise, and troubleshoot complex UIs and fullstack integrations. Excellent communication and leadership skills with More ❯

Fullstack Engineer, you will be pivotal in both frontend and backend development, crafting responsive, scalable web applications. This role requires strong expertise across the stack — from UI/UX design principles to backend integrations. You will design and implement APIs using JavaScript, TypeScript, and React, ensuring seamless performance and scalability. We’re looking for a proactive and experienced … and enjoys leading complex projects from conception to delivery. You’ll be both a technical leader and a driver of innovation across the team. Key Responsibilities Data Pipeline Architecture Design and implement robust, scalable data pipelines. Optimise data flow between databases (MySQL, MongoDB) and applications. Fullstack Development Develop high-quality, scalable applications using Node.js, TypeScript, and React. Collaborate with … frameworks and state management libraries like Redux or Context API. Hands-on experience with cloud services (AWS or GCP), particularly for deploying and managing applications0. Strong understanding of RESTful API design (GraphQL experience a plus). Analytical mindset with the ability to design, optimise, and troubleshoot complex UIs and fullstack integrations. Excellent communication and leadership skills with More ❯

Fullstack Engineer, you will be pivotal in both frontend and backend development, crafting responsive, scalable web applications. This role requires strong expertise across the stack — from UI/UX design principles to backend integrations. You will design and implement APIs using JavaScript, TypeScript, and React, ensuring seamless performance and scalability. We’re looking for a proactive and experienced … and enjoys leading complex projects from conception to delivery. You’ll be both a technical leader and a driver of innovation across the team. Key Responsibilities Data Pipeline Architecture Design and implement robust, scalable data pipelines. Optimise data flow between databases (MySQL, MongoDB) and applications. Fullstack Development Develop high-quality, scalable applications using Node.js, TypeScript, and React. Collaborate with … frameworks and state management libraries like Redux or Context API. Hands-on experience with cloud services (AWS or GCP), particularly for deploying and managing applications0. Strong understanding of RESTful API design (GraphQL experience a plus). Analytical mindset with the ability to design, optimise, and troubleshoot complex UIs and fullstack integrations. Excellent communication and leadership skills with More ❯

standard Back End role. We are seeking a foundational engineer to own our single greatest strategic asset: our unique, privileged access to network-level intelligence via the GSMA CAMARA API standard. This is our right to win, and you will be the engineer responsible for building the bridge to it. You will be the Critical Path Owner for Track … Key Responsibilities Telco Integration & Architecture Own and build the Security Signal Ingestion path, the secure, low-latency, and out-of-band data channel connecting to our founding members' network API gateways. Architect and implement a carrier-agnostic, vendor-agnostic connector layer to consume RESTful APIs from a heterogeneous global landscape of telco partners and IMS vendors (eg, Nokia, Ericsson … technical liaison to the engineering teams at our telco founders (Deutsche Telekom, Singtel, SKT, etc.), working hand-in-glove to navigate, validate, and productionize their new CAMARA network APIs. Design and build the high-throughput microservices that will query, ingest, normalize, and cache network signals (eg, sim-swap, device-roaming-status) to be used in our Real Time Scam More ❯

a standard backend role. We are seeking a foundational engineer to own our single greatest strategic asset: our unique, privileged access to network-level intelligence via the GSMA CAMARA API standard. This is our right to win, and you will be the engineer responsible for building the bridge to it. You will be the Critical Path Owner for Track … Key Responsibilities Telco Integration & Architecture ? Own and build the Security Signal Ingestion path, the secure, low-latency, and out-of-band data channel connecting to our founding members' network API gateways. ? Architect and implement a carrier-agnostic, vendor-agnostic connector layer to consume RESTful APIs from a heterogeneous global landscape of telco partners and IMS vendors (e.g., Nokia, Ericsson … technical liaison to the engineering teams at our telco founders (Deutsche Telekom, Singtel, SKT, etc.), working hand-in-glove to navigate, validate, and productionize their new CAMARA network APIs. ? Design and build the high-throughput microservices that will query, ingest, normalize, and cache network signals (e.g., sim-swap, device-roaming-status) to be used in our real-time Scam More ❯

including: TypeScript/JavaScript (NextJS, NodeJS, Tailwind) Python (Django, Flask, or FastAPI) PostgreSQL Experience with building and scaling SaaS platforms in production. Strong background in software architecture, microservices, and API design. Hands-on experience with cloud platforms (AWS, Azure, or GCP). Excellent communication skills, capable of motivating and aligning technical teams. Desirable: Experience with AI tools, APIs, ML More ❯

including: TypeScript/JavaScript (NextJS, NodeJS, Tailwind) Python (Django, Flask, or FastAPI) PostgreSQL Experience with building and scaling SaaS platforms in production. Strong background in software architecture, microservices, and API design. Hands-on experience with cloud platforms (AWS, Azure, or GCP). Excellent communication skills, capable of motivating and aligning technical teams. Desirable: Experience with AI tools, APIs, ML More ❯

reflects the great diversity of our real customers and users across the world. What You’ll Do Own our engineering stack from MVP to scale — backend, frontend, infra . Design architecture, choose tools, and set engineering standards. Work directly with early users to iterate quickly. Collaborate with the founding team on strategy, hiring, and scaling the tech team. Ship … high-quality, user-focused features (that change Oceans and planet) fast. What We’re Looking For 5+ years of backend expertise in Go including API design, microservices architecture, gRPC/REST services, and database design (PostgreSQL, Redis). Frontend proficiency with React/Next.js, responsive design, and modern JavaScript/TypeScript Cloud infrastructure knowledge including AWS … and opportunity. Expert in solving deep technical problems with customer outcomes top of mind. Ability to evaluate and make decisions based on a balanced assessment of key factors, including design, scalability, performance, technical debt and cost efficiency. Working highly collaboratively in a team environment. What We Offer Professional Impact & Growth Build a high-impact platform from emerging MVP to More ❯

reflects the great diversity of our real customers and users across the world. What You’ll Do Own our engineering stack from MVP to scale — backend, frontend, infra . Design architecture, choose tools, and set engineering standards. Work directly with early users to iterate quickly. Collaborate with the founding team on strategy, hiring, and scaling the tech team. Ship … high-quality, user-focused features (that change Oceans and planet) fast. What We’re Looking For 5+ years of backend expertise in Go including API design, microservices architecture, gRPC/REST services, and database design (PostgreSQL, Redis). Frontend proficiency with React/Next.js, responsive design, and modern JavaScript/TypeScript Cloud infrastructure knowledge including AWS … and opportunity. Expert in solving deep technical problems with customer outcomes top of mind. Ability to evaluate and make decisions based on a balanced assessment of key factors, including design, scalability, performance, technical debt and cost efficiency. Working highly collaboratively in a team environment. What We Offer Professional Impact & Growth Build a high-impact platform from emerging MVP to More ❯

reflects the great diversity of our real customers and users across the world. What You’ll Do Own our engineering stack from MVP to scale — backend, frontend, infra . Design architecture, choose tools, and set engineering standards. Work directly with early users to iterate quickly. Collaborate with the founding team on strategy, hiring, and scaling the tech team. Ship … high-quality, user-focused features (that change Oceans and planet) fast. What We’re Looking For 5+ years of backend expertise in Go including API design, microservices architecture, gRPC/REST services, and database design (PostgreSQL, Redis). Frontend proficiency with React/Next.js, responsive design, and modern JavaScript/TypeScript Cloud infrastructure knowledge including AWS … and opportunity. Expert in solving deep technical problems with customer outcomes top of mind. Ability to evaluate and make decisions based on a balanced assessment of key factors, including design, scalability, performance, technical debt and cost efficiency. Working highly collaboratively in a team environment. What We Offer Professional Impact & Growth Build a high-impact platform from emerging MVP to More ❯

reflects the great diversity of our real customers and users across the world. What You’ll Do Own our engineering stack from MVP to scale — backend, frontend, infra . Design architecture, choose tools, and set engineering standards. Work directly with early users to iterate quickly. Collaborate with the founding team on strategy, hiring, and scaling the tech team. Ship … high-quality, user-focused features (that change Oceans and planet) fast. What We’re Looking For 5+ years of backend expertise in Go including API design, microservices architecture, gRPC/REST services, and database design (PostgreSQL, Redis). Frontend proficiency with React/Next.js, responsive design, and modern JavaScript/TypeScript Cloud infrastructure knowledge including AWS … and opportunity. Expert in solving deep technical problems with customer outcomes top of mind. Ability to evaluate and make decisions based on a balanced assessment of key factors, including design, scalability, performance, technical debt and cost efficiency. Working highly collaboratively in a team environment. What We Offer Professional Impact & Growth Build a high-impact platform from emerging MVP to More ❯