26 to 50 of 116 API Design Jobs

Senior Developer, Back End, API, .Net SQL, NW London to £80K (office based role) A Senior Back End Developer is required to join this established financial software house based in North London. They work with some of the leading brands in retail and media, offering financial management systems developed … required with expertise in .NET, C#/VB, SQL Server, and SAP Business One integration. The ideal candidate should have strong skills in RESTful API development, database optimization, and Azure DevOps pipeline management. Knowledge of API security, CI/CD automation, and Swagger documentation is recommended. Responsibilities API ...

Genesis10 is currently seeking an Infrastructure Design Engineer (Cloud) for a contract position with a Global Financial Institution located in Charlotte, NC, Plano, TX, or Pennington, NJ. This is a 12+ month contract opportunity. This role will focus on modernizing processes and migrating applications to the cloud. The ideal … public cloud environments, with a strong emphasis on Terraform, AWS, and Azure. You will partner with internal architecture, engineering, and development teams to define design patterns and ensure solutions meet resiliency, security, and compliance standards. Responsibilities: Design, develop, and manage infrastructure solutions for cloud environments, utilizing both ...

autonomy over how things get built. You'll also play a mentorship role - raising the engineering bar across the team as we scale. Responsibilities Design scalable, secure, and fault-tolerant full-stack architectures, ensuring high availability and resilience across Azure-hosted environments Architect robust backend services in Python using … modern frameworks (FastAPI, Pydantic), implementing clean API design, efficient data pipelines, and integration patterns within our Azure ecosystem Establish and enforce best practices for the TypeScript/React frontend, ensuring a highly performant, accessible, and intuitive user experience, including real-time interfaces and interactive data visualisations Lead ...

comfortable identifying problems and driving solutions independently. You will take end-to-end ownership of features, contributing across both backend and frontend to design, build, and deliver high-quality product experiences. In this role, you will primarily work on Purchase Warrior, helping to develop and scale the platform … platform used by thousands of businesses across the UK Opportunities for growth as the engineering team and platform continue to expand Key Responsibilities Design, build, and maintain scalable backend services and APIs Develop frontend features to deliver complete product functionality Take end-to-end ownership of features from design ...

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 ...

expertise in Corporate Payments and major payment schemes (SEPA, FPS, CHAPS, SWIFT). Regulatory change experience (PSD2/3, ISO 20022, Open Banking). API design, microservices, integration platforms. Cloud experience (AWS/Azure/GCP), DevOps, CI/CD, Docker/Kubernetes. Knowledge of Java, .NET, Python ...

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 ...