26 to 50 of 107 Permanent API Design Jobs

APIs, managing infrastructure with Cloudformation, and building modern user interfaces with React. You will work on a high-traffic system that handles billions of API calls, requiring strong attention to scalability, performance, and reliability. Key Responsibilities Design, develop, and maintain microservices and RESTful APIs (Node.js + AWS Lambda … Handle data and queries using relational databases (e.g., PostgreSQL) Collaborate in designing and developing the user interface using React Integrate and monitor AWS services (API Gateway, S3, CloudWatch, RDS, CloudFront, etc.) Ensure testability, code quality, and DevOps best practices Technical Requirements Minimum of 5 years of experience in full ...

Engineer to help us scale our data and analytics capabilities across the UK and international markets. In this role, you will contribute to the design, development and maintenance of the data pipelines, platforms and services that power Cervus’ analytics. Working closely with experienced engineers, analysts, and delivery teams … defence. You will also be encouraged to leverage modern AI tools to accelerate high quality, sustainable development. As a Full Stack Engineer, you will: • Design, develop, automatically test and maintain full-stack web applications with a focus on data pipelines, analytics dashboards, and reporting tools. • Build scalable RESTful APIs ...

core stack includes: The Engine: Expert-level C# and .NET Core mastery. Architecture: Deep understanding of SOA (Service Oriented Architecture) and complex Object-Oriented design patterns. System Dynamics: Specialized knowledge of concurrency, asynchrony, and parallelism —essential for real-time transactional processing. Data & Web: High proficiency in SQL Server … API design, and modern front-end fundamentals (HTML/CSS/JS). Reliability: A strict practitioner of TDD (Test Driven Development) and robust CI/CD processes. Desired Innovations Our client is actively modernizing. Exposure to the following is highly valued: Cloud & Orchestration: Azure ecosystems, Docker ...

role is for you. What you'll do You'll be at the core of a data-intensive platform powering hundreds of installations worldwide. Design and build scalable backend services, APIs, and data pipelines Work on our streaming data platform (real-time data processing, ingestion, and distribution) Ensure systems … reliable, observable, and performant Contribute to data modeling , database design, and architecture decisions Collaborate with front-end developers to deliver seamless end-to-end features Set up and improve monitoring, logging, and data quality checks Take ownership from development to deployment and production operations Continuously improve systems through experimentation ...

platform that supports thousands of connected devices in the field. Key Responsibilities Develop and maintain scalable backend services using Python (Django) and AWS Design and build robust APIs and data models for both internal and customer-facing applications Work with IoT communication protocols (e.g. MQTT, HTTP) to integrate with … data Collaborate with cross-functional teams including hardware and edge engineering Troubleshoot and resolve production issues in a fast-paced environment Contribute to system design, architecture discussions, and technical decision-making Support end users and work closely with customer teams to deliver reliable solutions Essential Skills and Experience Strong ...

ambiguity and proposing simple, robust solutions Contributing to architectural documentation and decision records Tech Stack & Experience Core technologies: .NET 10/ASP.NET Core Web API Entity Framework Core with Azure SQL .NET MAUI (iOS & Android) - offline-first design Angular 21 (strict TypeScript) DevExpress DevExtreme (v25) Microsoft Azure … experience with modern Angular (v15+) Hands-on Azure architecture and deployment experience Experience implementing Infrastructure as Code Experience integrating Azure Entra ID Strong REST API design knowledge Experience implementing CI/CD pipelines Security-first mindset with strong attention to detail Ability to work independently within defined architectural ...

ambiguity and proposing simple, robust solutions Contributing to architectural documentation and decision records Tech Stack & Experience Core technologies: .NET 10/ASP.NET Core Web API Entity Framework Core with Azure SQL .NET MAUI (iOS & Android) - offline-first design Angular 21 (strict TypeScript) DevExpress DevExtreme (v25) Microsoft Azure … experience with modern Angular (v15+) Hands-on Azure architecture and deployment experience Experience implementing Infrastructure as Code Experience integrating Azure Entra ID Strong REST API design knowledge Experience implementing CI/CD pipelines Security-first mindset with strong attention to detail Ability to work independently within defined architectural ...

ambiguity and proposing simple, robust solutions Contributing to architectural documentation and decision records Tech Stack & Experience Core technologies: .NET 10/ASP.NET Core Web API Entity Framework Core with Azure SQL .NET MAUI (iOS & Android) - offline-first design Angular 21 (strict TypeScript) DevExpress DevExtreme (v25) Microsoft Azure … experience with modern Angular (v15+) Hands-on Azure architecture and deployment experience Experience implementing Infrastructure as Code Experience integrating Azure Entra ID Strong REST API design knowledge Experience implementing CI/CD pipelines Security-first mindset with strong attention to detail Ability to work independently within defined architectural ...

ambiguity and proposing simple, robust solutions Contributing to architectural documentation and decision records Tech Stack & Experience Core technologies: .NET 10/ASP.NET Core Web API Entity Framework Core with Azure SQL .NET MAUI (iOS & Android) - offline-first design Angular 21 (strict TypeScript) DevExpress DevExtreme (v25) Microsoft Azure … experience with modern Angular (v15+) Hands-on Azure architecture and deployment experience Experience implementing Infrastructure as Code Experience integrating Azure Entra ID Strong REST API design knowledge Experience implementing CI/CD pipelines Security-first mindset with strong attention to detail Ability to work independently within defined architectural ...

people actually love to use? We are representing a globally recognized digital product studio that sits at the sweet spot of high-end aesthetic design and hardcore engineering. They're looking for a Senior & Lead Full-stack Engineer to join the growing function. This isn't a "ticket-taking … robust, scalable backend. What You Bring to the Table React Node/TypeScript/JavaScript Cloud: AWS, Azure, or GCP. APIs: API design and integration (REST & GraphQL). Databases: SQL, NoSQL, real-time, etc. AI Tooling: Confident using AI-boosted environments to ensure quality (Claude or similar). ...

Security Architecture Deep knowledge of IAM, encryption, compliance frameworks Ability to enforce security controls across cloud environments Integration Architecture Knowledge of event-driven patterns, API design, and hybrid connectivity Non-Functional Requirements Expert in designing highly available, fault-tolerant and resilient systems Experience with observability, monitoring, disaster recovery ...

MUST apply via this advert ** We are looking for a AI engineer someone that is capable of deploying and maintaining infrastructure: Python (must) API design and frameworks FastAPI ideally (but Flask and Django, in said order, would indicate this) Experience with AWS ideally (Azure or GCP would … frameworks CI/CD GitHub actions (GitLab, TeamCity, CircleCI) This is data related software development, responsible for whole lifecycle and developed end point for API data pipeline. Must be able to write infrastructure code in terraform or AWS but can be taught. We design and develop across ...

MUST apply via this advert ** We are looking for a AI engineer someone that is capable of deploying and maintaining infrastructure: Python (must) API design and frameworks FastAPI ideally (but Flask and Django, in said order, would indicate this) Experience with AWS ideally (Azure or GCP would … frameworks CI/CD GitHub actions (GitLab, TeamCity, CircleCI) This is data related software development, responsible for whole lifecycle and developed end point for API data pipeline. Must be able to write infrastructure code in terraform or AWS but can be taught. We design and develop across ...

agility with the backing of a well-established business. The Senior Back End Developer will... take ownership of backend engineering for a new API-first data intelligence platform. Role Highlights Design and build scalable backend systems from a true greenfield starting point Define architecture, balancing rapid delivery with … long-term scalability Develop API-first services for data-heavy, enterprise-grade applications Embed observability, metrics, and performance tracking from day one Collaborate within a small, high-autonomy team shaping a new product You Will Need Extensive backend development experience within data-driven B2B environments Strong programming skills ...

evolving technology landscape. This role is focused on the Microsoft tech stack, so we are looking for someone with good experience in C#.NET. Responsibilities Design, develop, test, and deploy backend applications using .NET and C# Translate business requirements into clean, maintainable, and scalable technical solutions Contribute to system design … contribute to improving overall code quality Diagnose and resolve bugs, performance issues, and production incidents Work with SQL databases, including query optimisation and schema design Collaborate with frontend developers and stakeholders to deliver complete features Continuously improve technical skills and contribute ideas to enhance systems and processes Requirements 3+ ...

Full Stack (Backend) Engineer who thrives on building clean, scalable systems quickly. You’ll play a key role in shaping our backend architecture—from API design and data pipelines to job processing and observability. What You’ll Do Design and build robust backend systems Architect scalable infrastructure … processing, analytics, and event tracking Build internal tooling for rate limiting, quotas, and authentication Design, develop, and maintain APIs and backend services Collaborate closely with product, design, and CX to deliver exceptional features Optimize for performance, security, and scalability Write clean, maintainable, efficient code Stay current with emerging ...

collaboration in a fast-moving startup environment. The RoleTechnical Strategy & Leadership Work alongside the founder to define and evolve the technical roadmap Lead architectural design and critical technology decisions Champion engineering best practices, code quality, and technical excellence Mentor, coach, and grow engineers at all levels Foster a culture … ownership, collaboration, and innovation Backend Architecture & Development Architect, build, and scale backend services and RESTful APIs Design, optimise, and maintain MongoDB database solutions Improve system reliability, performance, and scalability Resolve complex production issues with robust solutions Implement microservices and modern backend patterns Collaboration & Delivery Partner with Product, Design ...

Stack Developer - Remote - Competitive Salary I'm working with an exciting organisation that is looking to appoint a Senior Full Stack Developer to help design and deliver secure, cloud-native applications within a modern Microsoft and Azure ecosystem. This is an excellent opportunity for an experienced full-stack engineer … maintaining unit and frontend tests (NUnit and ViTest) Contributing to CI/CD pipeline improvements and secure deployment practices Participating in architecture and technical design reviews Ensuring all development aligns with OWASP security best practices Tech Stack & Environment Core technologies: .NET 10/ASP.NET Core Angular 21 (mandatory) DevExpress ...

Stack Developer - Remote - Competitive Salary I'm working with an exciting organisation that is looking to appoint a Senior Full Stack Developer to help design and deliver secure, cloud-native applications within a modern Microsoft and Azure ecosystem. This is an excellent opportunity for an experienced full-stack engineer … maintaining unit and frontend tests (NUnit and ViTest) Contributing to CI/CD pipeline improvements and secure deployment practices Participating in architecture and technical design reviews Ensuring all development aligns with OWASP security best practices Tech Stack & Environment Core technologies: .NET 10/ASP.NET Core Angular 21 (mandatory) DevExpress ...

Stack Developer - Remote - Competitive Salary I'm working with an exciting organisation that is looking to appoint a Senior Full Stack Developer to help design and deliver secure, cloud-native applications within a modern Microsoft and Azure ecosystem. This is an excellent opportunity for an experienced full-stack engineer … maintaining unit and frontend tests (NUnit and ViTest) Contributing to CI/CD pipeline improvements and secure deployment practices Participating in architecture and technical design reviews Ensuring all development aligns with OWASP security best practices Tech Stack & Environment Core technologies: .NET 10/ASP.NET Core Angular 21 (mandatory) DevExpress ...

Stack Developer - Remote - Competitive Salary I'm working with an exciting organisation that is looking to appoint a Senior Full Stack Developer to help design and deliver secure, cloud-native applications within a modern Microsoft and Azure ecosystem. This is an excellent opportunity for an experienced full-stack engineer … maintaining unit and frontend tests (NUnit and ViTest) Contributing to CI/CD pipeline improvements and secure deployment practices Participating in architecture and technical design reviews Ensuring all development aligns with OWASP security best practices Tech Stack & Environment Core technologies: .NET 10/ASP.NET Core Angular 21 (mandatory) DevExpress ...

support junior and senior engineers Conduct code reviews and uphold engineering best practices Backend Engineering Build and maintain scalable backend services and RESTful APIs Design and optimise MongoDB database solutions Improve and maintain existing backend infrastructure Troubleshoot production issues and implement robust solutions Collaboration & Delivery Work closely with cross … have experience with: MongoDB (data modelling, indexing, aggregation, performance tuning) Node.js and the wider JavaScript/TypeScript ecosystem Express.js and/or Fastify RESTful API design AWS or similar cloud platforms Microservices architecture Testing frameworks (Vitest, Jest, Mocha, etc.) CI/CD pipelines & DevOps practices GitHub workflows Observability ...

shaping the future of the product. What you’ll be doing: • Designing and building scalable microservices using Node.js (Nest.js) and React • Driving an API-first architecture with strong focus on service-to-service communication and contract testing • Owning features end-to-end, from idea to production with a strong … What they’re looking for: • Strong experience building distributed systems/microservices architectures • Deep hands-on expertise with Node.js and React • Solid understanding of API design, event-driven systems, and contract testing • Experience working in fast-paced, ambiguous environments • Passion for automation, clean code, and solving real customer ...

with high autonomy. This is a high-seniority individual contributor role. You will have been the primary owner of production systems, accountable for their design, deployment, and reliability under real-world load. You will be hands-on, responsible for both building and deploying the systems you work on. About … communities together through real-world classes, clubs and events. We are a product-led company with a high bar for quality, where thoughtful software design is the main engine of adoption and retention. Our growth has come not from sales people, but from customers who became our champions, because ...

locally) c£55,000 to £65,000 per year Pension, Bonuses, Training and Development, etc. Skills and Experience: Expertise in C#, .NET Core, REST API design and backend architecture. Strong SQL skills with the ability to create performant, reliable database logic. Strong understanding of ORM patterns, data mapping … product and offshore teams. Experience integrating services into CI/CD pipelines (GitHub Actions or Azure DevOps). Familiarity with clean architecture, domain-driven design, or similar engineering patterns. Understanding of containerisation workflows (Docker) and AKS operational concepts. Mentoring experience or leadership within engineering teams. Exposure to API ...