1 to 25 of 56 Permanent API Design Jobs in the South East

drive technical excellence, establish coding standards, and optimise real-time services for a fast-growing platform. You’ll be responsible for backend architecture, microservices design, database management (SQL), and cloud integration (AWS) while collaborating with designers, engineers, and product teams to deliver world-class gaming solutions. Key Responsibilities ✔ Develop … Lead – Drive the development of scalable, interactive gaming products using Java (11+), Scala & Spring Boot . ✔ Microservices & API Design – Design and implement modular microservices architecture with 3-tier API design . ✔ Cloud & DevOps – Work within an AWS environment (supported by an in-house DevOps team … experience (currently using Java 21). ✅ SQL Database Proficiency – Strong experience with SQL databases (PostgreSQL preferred). ✅ Microservices & Cloud – Deep knowledge of microservices architecture, API design, and AWS . ✅ Spring Boot & Scala – Nice to have but not essential. ✅ Betting, Gaming, or Big Data Background – Experience in real-time More ❯

control platforms such as GIT. Cloud and Testing: Enhance your skills with Cloudflare, AWS, Terraform, and testing frameworks like Xunit, Nunit, Jest, and Jasmine. API Design: Design, develop, and consume RESTful APIs. Agile Methodologies: Embrace Agile methodologies (Sprints, Scrum, Stand-Ups) to deliver high-quality, responsive solutions. … JavaScript and web technologies (Angular, Vue, React), HTML5, CSS3, IIS SQL Server and MySQL CI/CD tools (TeamCity) Source control platforms (GIT) RESTful API design and consumption Testing frameworks (Xunit, Nunit, Jest, Jasmine) Logging tools (Elasticsearch, Rollbar, Sentry) Nice to Have: Cloudflare, AWS, Terraform experience Join us More ❯

control platforms such as GIT. Cloud and Testing: Enhance your skills with Cloudflare, AWS, Terraform, and testing frameworks like Xunit, Nunit, Jest, and Jasmine. API Design: Design, develop, and consume RESTful APIs. Agile Methodologies: Embrace Agile methodologies (Sprints, Scrum, Stand-Ups) to deliver high-quality, responsive solutions. … JavaScript and web technologies (Angular, Vue, React), HTML5, CSS3, IIS SQL Server and MySQL CI/CD tools (TeamCity) Source control platforms (GIT) RESTful API design and consumption Testing frameworks (Xunit, Nunit, Jest, Jasmine) Logging tools (Elasticsearch, Rollbar, Sentry) Nice to Have: Cloudflare, AWS, Terraform experience Join us More ❯

control platforms such as GIT. Cloud and Testing: Enhance your skills with Cloudflare, AWS, Terraform, and testing frameworks like Xunit, Nunit, Jest, and Jasmine. API Design: Design, develop, and consume RESTful APIs. Agile Methodologies: Embrace Agile methodologies (Sprints, Scrum, Stand-Ups) to deliver high-quality, responsive solutions. … JavaScript and web technologies (Angular, Vue, React), HTML5, CSS3, IIS SQL Server and MySQL CI/CD tools (TeamCity) Source control platforms (GIT) RESTful API design and consumption Testing frameworks (Xunit, Nunit, Jest, Jasmine) Logging tools (Elasticsearch, Rollbar, Sentry) Nice to Have: Cloudflare, AWS, Terraform experience Join us More ❯

control platforms such as GIT. Cloud and Testing: Enhance your skills with Cloudflare, AWS, Terraform, and testing frameworks like Xunit, Nunit, Jest, and Jasmine. API Design: Design, develop, and consume RESTful APIs. Agile Methodologies: Embrace Agile methodologies (Sprints, Scrum, Stand-Ups) to deliver high-quality, responsive solutions. … JavaScript and web technologies (Angular, Vue, React), HTML5, CSS3, IIS SQL Server and MySQL CI/CD tools (TeamCity) Source control platforms (GIT) RESTful API design and consumption Testing frameworks (Xunit, Nunit, Jest, Jasmine) Logging tools (Elasticsearch, Rollbar, Sentry) Nice to Have: Cloudflare, AWS, Terraform experience Join us More ❯

Leverage tooling and automated testing to deliver quality software at speed Contribute to the core architecture of our systems, improving database performance, data integrity, API design, and distributed system reliability. Your experience with software resilience will help us build systems that gracefully handle unexpected scenarios Must-have Strong … experience with full-stack web development using TypeScript or other typed languages Experience with modern frontend frameworks (React preferred) Experience with backend development and API design (Node.js preferred) Understanding of distributed systems concepts — if you've built reliable microservices or dealt with API synchronisation, you already have … it Ability to work effectively in cross-functional teams Strong communication skills and customer empathy At least one of these areas Product thinking and design mentality: Experience working closely with users, translating complex requirements into simple interfaces, and making scope decisions based on customer value Deep distributed systems expertise More ❯

Java Full stack Software Engineer Job Description: Opportunity for talented Full Stack Software Engineer to join collaborative engineering team. This role will focus on design, architecture, and implementation of software components as well as the overall solution, utilizing concepts, and best engineering practices of microservices architecture. As Full Stack … improvements to provide our customers and partners future proof, flexible and scalable solutions, while maintaining high quality standards. You will be responsible for analysis, design, automation, engineering, research and development, implementation, following and implementing design patterns and principles, utilizing concepts of clean architecture and clean code. Primary Responsibilities … Develop and maintain server-side and client-side applications using React, TypeScript, Java, Spring Boot, ensuring code quality, efficiency, and adherence to best practices. Design and implement scalable and efficient data structures and algorithms to optimize application performance. Ensure seamless integration of front-end and back-end components to More ❯

Java Full stack Software Engineer Job Description: Opportunity for talented Full Stack Software Engineer to join collaborative engineering team. This role will focus on design, architecture, and implementation of software components as well as the overall solution, utilizing concepts, and best engineering practices of microservices architecture. As Full Stack … improvements to provide our customers and partners future proof, flexible and scalable solutions, while maintaining high quality standards. You will be responsible for analysis, design, automation, engineering, research and development, implementation, following and implementing design patterns and principles, utilizing concepts of clean architecture and clean code. Primary Responsibilities … Develop and maintain server-side and client-side applications using React, TypeScript, Java, Spring Boot, ensuring code quality, efficiency, and adherence to best practices. Design and implement scalable and efficient data structures and algorithms to optimize application performance. Ensure seamless integration of front-end and back-end components to More ❯

in Computer Science or relevant discipline 3-5 years professional software development experience Strong Python skills Some experience with Reinforcement Learning Solid grounding in API design, algorithms, design principles Well versed with industry standard development practices, testing frameworks, source control (git), CI, etc Experience of agile development More ❯

in Computer Science or relevant discipline 3-5 years professional software development experience Strong Python skills Some experience with Reinforcement Learning Solid grounding in API design, algorithms, design principles Well versed with industry standard development practices, testing frameworks, source control (git), CI, etc Experience of agile development More ❯

developers. This is an opportunity to shape the direction of our platform and foster a culture of collaboration and innovation. Key Responsibilities: Ruby Development: Design, build, and maintain robust, scalable, and high-performance Ruby applications. Write clean, maintainable, and efficient code following best practices and coding standards. Collaborate with … frontend developers to integrate backend services with the frontend. DevOps & Automation: Collaborate with the DevOps team to design and implement CI/CD pipelines and deployment automation. Ensure the smooth deployment of Ruby applications by utilizing infrastructure-as-code tools (e.g., Terraform, Ansible). Maintain and improve our cloud … based infrastructure (AWS, GCP, or Azure) to ensure scalability and reliability. Database Architecture & Optimization: Design and optimize databases (PostgreSQL, MySQL, or MongoDB) for high performance and scalability. Write efficient queries, manage indexing, and improve query performance. Implement data integrity and backup strategies to ensure data security. Leadership & Collaboration: Mentor More ❯

commercial consulting. Key Responsibilities Contribute to the development and evolution of their analytical capability, working alongside a highly skilled team of energy market experts. Design, build and maintain robust database infrastructure to optimise internal data workflows and enable scalable access to data to consultants and to our in-house … including cloud-based solutions, to enable efficient and scalable stochastic modelling of power systems and energy assets across European and global markets. Lead the design and improvement of UI/UX components of our internal modelling tools, ensuring ease of use, accessibility, and scalability across the company. Collaborate closely … Lambda, S3), Docker, CI/CD, serverless architecture Frontend development: e.g. JavaScript/TypeScript, React, Dash, or similar frameworks Backend APIs: FastAPI, Flask, RESTful API design UI/UX design for data tools (e.g., streamlining internal workflows and dashboards) Experience with energy systems modelling/optimisation, quantitative More ❯

commercial consulting. Key Responsibilities Contribute to the development and evolution of their analytical capability, working alongside a highly skilled team of energy market experts. Design, build and maintain robust database infrastructure to optimise internal data workflows and enable scalable access to data to consultants and to our in-house … including cloud-based solutions, to enable efficient and scalable stochastic modelling of power systems and energy assets across European and global markets. Lead the design and improvement of UI/UX components of our internal modelling tools, ensuring ease of use, accessibility, and scalability across the company. Collaborate closely … Lambda, S3), Docker, CI/CD, serverless architecture Frontend development: e.g. JavaScript/TypeScript, React, Dash, or similar frameworks Backend APIs: FastAPI, Flask, RESTful API design UI/UX design for data tools (e.g. streamlining internal workflows and dashboards) Experience with energy systems modelling/optimisation, quantitative More ❯

s a unique opportunity to help shape the future of marketing by rapidly translating strategic requirements into intelligent, scalable solutions. Key Responsibilities Solution Architecture: Design scalable, modular architectures for AI-driven marketing applications and microservices. Requirements Engineering: Gather, analyse, and translate business and marketing requirements into detailed technical specifications. … and cloud services. MarTech Innovation: Research and implement AI solutions specifically targeting marketing use cases (content generation, audience analytics, personalisation). Data Pipeline Architecture: Design robust data flows between marketing systems and AI services. Technical Leadership: Provide strategic direction, mentorship, and best practices for AI implementation across the team. … development tools (e.g., GitHub Copilot, Amazon CodeWhisperer) and integrating large language models (LLMs) and AI APIs. Deep understanding of microservices architecture, Model Context Protocol, API design, and cloud platforms (GCP, Azure). Skilled in containerisation and orchestration (Docker, Kubernetes), version control (Git, BitBucket), and CI/CD pipelines. More ❯

to define target state architecture and roadmap. Transactional Banking Experience (Payments, Governance, Compliance) Proficient in defining the target state architecture, roadmap and high-level design for the assigned scope based on business outcomes and aligned with the bank's strategy. The target state architecture and solution should cover all … Proficient in Cash Management & Liquidity domain along with deep understanding of integration to Payments and Core Banking platforms. Proficient in Cloud Native Architecture, Microservices design patterns, API design, Event-Driven Architecture and Database concepts. Expected to have good understanding of monolithic to microservices migration. Responsibilities – Current state More ❯

Application Security Specialist Our client is looking to hire mid-level API & Application Security Specialist to join them on a 6-month initial contract, to work remotely with some occasional trips to the London site. This role will be operating INSIDE IR35 Key Skills Required: Deep knowledge of OWASP … API Top 10 Able to review Swagger/Open API specs for vulnerabilities Advise on secure API design patterns Familiar with fallback controls such as WAF's, API gateways Experience using SIEM/logging tools to track API threats Familiarity with NIST, OWASP SAMM … or internal security frameworks Experience producing risk dashboards/reports for API's Able to translate technical risks into business language, collaborating with key stakeholders If interested in this role, please apply today More ❯

Application Security Specialist Our client is looking to hire mid-level API & Application Security Specialist to join them on a 6-month initial contract, to work remotely with some occasional trips to the London site. This role will be operating INSIDE IR35 Key Skills Required: Deep knowledge of OWASP … API Top 10 Able to review Swagger/Open API specs for vulnerabilities Advise on secure API design patterns Familiar with fallback controls such as WAF's, API gateways Experience using SIEM/logging tools to track API threats Familiarity with NIST, OWASP SAMM … or internal security frameworks Experience producing risk dashboards/reports for API's Able to translate technical risks into business language, collaborating with key stakeholders If interested in this role, please apply today More ❯

Application Security Specialist Our client is looking to hire mid-level API & Application Security Specialist to join them on a 6-month initial contract, to work remotely with some occasional trips to the London site. This role will be operating INSIDE IR35 Key Skills Required: Deep knowledge of OWASP … API Top 10 Able to review Swagger/Open API specs for vulnerabilities Advise on secure API design patterns Familiar with fallback controls such as WAF's, API gateways Experience using SIEM/logging tools to track API threats Familiarity with NIST, OWASP SAMM … or internal security frameworks Experience producing risk dashboards/reports for API's Able to translate technical risks into business language, collaborating with key stakeholders If interested in this role, please apply today More ❯

into technical solutions. Outstanding skills in React, Redux/MobX, Typescript, HTML5, CSS, and Figma. Experience working with UX/visual designers to implement design specifications using our tech stack. Experience with automated web UI testing frameworks. At least 10 years of commercial experience, ideally with a degree in … Computer Science or Engineering. Desirable Skills: Understanding of Web Services protocols such as REST, API design, and tooling like Swagger. Experience with Redis, SignalR, C#, and ASP.Net MVC (SAS uses .NET Core). Experience with high-scalability projects involving cloud infrastructure design and implementation, preferably on MS More ❯

build a Quality Management System that aligns with regulatory requirements whilst preserving our engineering culture Develop core architecture improvements for system reliability, database performance, API security, and distributed system design Mentor the team on security and quality best practices, helping to build a culture where compliance is a … DevOps practices (AWS preferred) Experience implementing and maintaining security controls and compliance frameworks Proficiency with infrastructure-as-code and GitOps methodologies Strong fundamentals in API design, databases, networks, and distributed systems Experience with CI/CD pipelines and automated testing TypeScript and Node.js proficiency in production environments Understanding More ❯

experienced Senior Machine Learning Operation Engineers to join our Data Function. You'll play a significant role within our Data Function, working on the design and implementation of machine learning model engineering frameworks, solutions, and best practices. You'll be technically proficient in machine learning and its applications; you … troubleshoot problems quickly Excellent problem-solving and analytic skills Powering the business with the right tools What's involved: You'll contribute to the design and implementation of Machine Learning Engineering standards and frameworks. You'll support model development, with an emphasis on auditability, versioning, and data security. You … model testing and validation. You'll assist in the optimisation of deployed ML model scoring code in production services. You'll assist in the design and implementation of data pipelines and engineering infrastructure to embed scaled machine learning solutions. You'll use CI/CD pipelines, manage the deployment More ❯

to meet new challenges. About the Role: OQC are looking for a Senior Software Engineer to join our growing team, developing web-based/api-based solutions for a variety of challenges encountered by our partners and end-users. In this role, you will also develop and maintain critical … the work within a team. Strong understanding of common data structures and programming methods. Strong problem solving, troubleshooting and analysis skills. Demonstrated ability to design, develop, and test high-performance distributed systems. Technically versatile and able to learn new skills that you can apply across multiple types of work. … Experience with containerised microservices and deployment in global environment. Strong knowledge of API design, RESTful principles, and microservices architecture. Uphold development standards and prioritize best coding practices. Cloud solutions experience. Desirable skills and experience: Experience in building web applications and working knowledge of one or more of JavaScript More ❯

talented 3 Fullstack Engineers (React/Python) to join the growing team and contribute to the development of intelligent, scalable digital products. Key Responsibilities: Design, build, and maintain scalable fullstack web applications using React on the frontend and Python (Django/FastAPI/Flask) on the backend. Collaborate closely … and modern JavaScript (ES6+) or TypeScript. Proficiency in Python , ideally with experience in web frameworks such as Django, FastAPI, or Flask. Strong understanding of API design, microservices, and web architecture. Experience with relational and NoSQL databases (e.g. PostgreSQL, MongoDB). Comfortable working with cloud services like AWS, Azure More ❯

with functional concepts Experience working with version control systems Experience writing testable code Good to have Technical Skills: Understanding of web application architecture and api design Understanding of event driven architecture including use of message brokers (eg. Apache Kafka, RabbitMQ, SQS etc) Understanding of micro service architecture Understanding More ❯

familiarity with functional concepts. Experience with version control systems. Experience writing testable code. Good to Have Technical Skills Understanding of web application architecture and API design. Knowledge of event-driven architecture and message brokers like Apache Kafka, RabbitMQ, SQS, etc. Understanding of microservice architecture. Knowledge of CI/CD More ❯