and implementation Experience building on container platforms such as Docker, Kubernetes Front-end skills Experience of using at least one of these JavaScript frameworks to create modern front-ends - React.js, Angular or Vue HTML, CSS, JavaScript (ES6) or TypeScript Webpack or Gulp A client-side Unit Testing framework e.g., Mocha or Jest Other technical skills API Management and Documentation (Swagger.io More ❯
lifecycle delivering user-centred digital solutions A full stack developer using core Java, CXF, Spring Boot, Jetty, Mustache, HTML, CSS & JavaScript JavaScript library and framework experience is preferable - Node, React, Angular Containerisation experience - Docker or Kubernetes or similar Experience of Microservices design and architecture Restful API Services experience Working within agile methods and using techniques such as Scrum, Kanban and More ❯
development, with exposure to both backend and frontend stacks. Strong programming proficiency in Python, C++, and Java (Quant/Trading grade codebases). Expertise in modern web development with React, Node.js, MongoDB, and SQL (Postgres, MySQL). Strong understanding of Git/GitHub, CI/CD workflows, code branching strategies, and code ownership. Prior work in a fintech, hedge fund More ❯
development, with exposure to both backend and frontend stacks. Strong programming proficiency in Python, C++, and Java (Quant/Trading grade codebases). Expertise in modern web development with React, Node.js, MongoDB, and SQL (Postgres, MySQL). Strong understanding of Git/GitHub, CI/CD workflows, code branching strategies, and code ownership. Prior work in a fintech, hedge fund More ❯
on delivering incremental value through high-quality, scalable, and maintainable solutions. Strong proficiency in C#, .NET, JavaScript, and TypeScript (required). Proficiency in front-end development using frameworks like React, Vue.js, or Angular (preferred but not required). Proficiency with PHP (desirable) Experience working with cloud infrastructure (AWS, GCP, or Azure) and containerization (Docker, Kubernetes). Strong understanding of CI More ❯
stakeholders (e.g., clients, users, product, platform, application owners). Design, develop, and maintain software applications using Python and SQL. Design and implement user interfaces using modern JS frameworks (e.g. React, Angular, or Vue.js). Build and maintain ETL/ELT pipelines and data models within data warehouses, an example pipeline being ingesting data from multiple Cyber Intelligence vendors. Architect and … transformation within data warehouses, knowledge of tools such as DBT is desired. Experience with front-end technologies, such as HTML5, CSS3, and JavaScript. Knowledge of JavaScript frameworks, such as React (preferred), Angular, and Vue.js. Knowledge of CSS frameworks, such as Bootstrap, Material UI, and Tailwind CSS. Strong understanding of API protocols and standards, including REST and GraphQL. Hands-on experience More ❯
Docker). • CI/CD pipeline experience, using GitHub Actions or Azure DevOps. • Database development skills in SQL, NoSQL, and cloud-native data stores. • Front-end development experience using React, with a solid grasp of UI/UX design and usability principles. • Proven experience in Agile teams, applying modern architecture, design patterns, unit testing, and maintaining high code quality standards. … Desirable Skills • Domain experience in the energy sector (e.g., downstream, upstream, integrated gas, energy trading, renewables & energy solutions). • Familiarity with Redux in React-based front-end development. • Experience with messaging systems such as Kafka, RabbitMQ, or Azure Service Bus. • Proficiency in Microservices and Cloud-Native Architecture. This needs combining with a positive attitude and an ability to work within More ❯
Docker). • CI/CD pipeline experience, using GitHub Actions or Azure DevOps. • Database development skills in SQL, NoSQL, and cloud-native data stores. • Front-end development experience using React, with a solid grasp of UI/UX design and usability principles. • Proven experience in Agile teams, applying modern architecture, design patterns, unit testing, and maintaining high code quality standards. … Desirable Skills • Domain experience in the energy sector (e.g., downstream, upstream, integrated gas, energy trading, renewables & energy solutions). • Familiarity with Redux in React-based front-end development. • Experience with messaging systems such as Kafka, RabbitMQ, or Azure Service Bus. • Proficiency in Microservices and Cloud-Native Architecture. This needs combining with a positive attitude and an ability to work within More ❯
Database Management: Design, optimize, and maintain complex SQL data models, ensuring efficient data structures, query performance, and reliability. Full-Stack Development: Develop responsive and performant front-end applications using ReactJS, focusing on UX/UI best practices. Integration & Automation: Architect and maintain integrations with external APIs such as AWS, Stripe, Zendesk, Twilio, Google Analytics, Google Ads, HMRC, etc... Code Quality … in Computer Science or related field from a Tier 1 university. Experience: Minimum of 4 years of full-time professional experience in software development, with strong expertise in TypeScript, ReactJS, and Next.JS. Solid experience in building RESTful APIs Leadership: Proven track record of leading development teams and managing large-scale projects. Database Expertise: In-depth experience with PostgreSQL/SQL More ❯
Database Management: Design, optimize, and maintain complex SQL data models, ensuring efficient data structures, query performance, and reliability. Full-Stack Development: Develop responsive and performant front-end applications using ReactJS, focusing on UX/UI best practices. Integration & Automation: Architect and maintain integrations with external APIs such as AWS, Stripe, Zendesk, Twilio, Google Analytics, Google Ads, HMRC, etc... Code Quality … in Computer Science or related field from a Tier 1 university. Experience: Minimum of 4 years of full-time professional experience in software development, with strong expertise in TypeScript, ReactJS, and Next.JS. Solid experience in building RESTful APIs Leadership: Proven track record of leading development teams and managing large-scale projects. Database Expertise: In-depth experience with PostgreSQL/SQL More ❯
modern engineering tools (Git, CI/CD), cloud platforms (Azure, AWS), and Infrastructure as Code (Terraform, Pulumi). Familiarity with various frameworks across front-end and back-end stacks (React, Angular, Vue, Blazor, FastAPI, Spring Boot, Django, .NET). Experience designing and justifying architectural choices. Ability to communicate complex concepts clearly to both technical and non-technical audiences. Experience with More ❯
City of London, London, England, United Kingdom Hybrid / WFH Options
Client Server Ltd
Senior C# Developer/Engineer (C# .Net Core React) London/WFH to £80k Are you a skilled C# Developer looking to work on complex and interesting systems with continual learning and self development opportunities You could be progressing your career at in a senior, hands-on role at a successful and scaling Retail FX Brokerage working on Greenfield systems. … a Senior C# Developer you'll be designing and developing high quality, maintainable, and reliable code for a real-time, low latency trading systems built mostly in C# and React deployed to Azure. You'll focus on C# .Net backend development within an AWS environment, but also with exposure across the full technology stack in a modern development environment with …/Kubernetes, EKS You have a good understanding of CQRS and event driven architectures Ideally you will also have some front end development experience with JavaScript/TypeScript/React.js or Angular You have strong analytical and problem solving skills You're collaborative with excellent communication skills What's in it for you: As a Senior C# Developer/Engineer More ❯
to improve release velocity and confidence. Technical Skills Required: Proficiency in modern programming languages and frameworks (e.g. JavaScript/TypeScript, Python, .NET, Node.js). Experience with frontend development (e.g. React, Angular, Hugo). Strong understanding of backend systems, API design, and system integration. Comfortable working with cloud platforms such as Microsoft Azure or AWS. Familiarity with databases (SQL/NoSQL More ❯
Knowledge on Document management and generation systems/applications. Experience with CI/CD pipelines. Familiarity with message brokers (e.g., RabbitMQ, Kafka). Knowledge of front-end technologies (Angular, React). Security-conscious development practices. Profound knowledge and experience in using J2EE/Jakarta EE frameworks and technologies such as Enterprise JavaBeans (EJB)/CDI, EJB Lites, Java Server Pages More ❯
Knowledge on Document management and generation systems/applications. Experience with CI/CD pipelines. Familiarity with message brokers (e.g., RabbitMQ, Kafka). Knowledge of front-end technologies (Angular, React). Security-conscious development practices. Profound knowledge and experience in using J2EE/Jakarta EE frameworks and technologies such as Enterprise JavaBeans (EJB)/CDI, EJB Lites, Java Server Pages More ❯
London, England, United Kingdom Hybrid / WFH Options
Client Server
a Backend Software Engineer you'll be designing and developing high quality, maintainable, and reliable code for a real-time, low latency trading systems built mostly in C# and React deployed to Azure. You'll focus on C# .Net backend development within an AWS environment, but also with exposure across the full technology stack in a modern development environment with …/Kubernetes, EKS You have a good understanding of CQRS and event driven architectures Ideally you will also have some front end development experience with JavaScript/TypeScript/React.js or Angular You have strong analytical and problem solving skills You're collaborative with excellent communication skills What's in it for you: As a Backend Software Engineer/Developer … competitive package: Up to £80k salary Bonus Private Healthcare Pension 25 days holiday Apply now to find out more about this Backend Software Engineer/Developer (C# .Net Core React) opportunity. At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come More ❯
City of London, London, England, United Kingdom Hybrid / WFH Options
Client Server Ltd
a Backend Software Engineer you'll be designing and developing high quality, maintainable, and reliable code for a real-time, low latency trading systems built mostly in C# and React deployed to Azure. You'll focus on C# .Net backend development within an AWS environment, but also with exposure across the full technology stack in a modern development environment with …/Kubernetes, EKS You have a good understanding of CQRS and event driven architectures Ideally you will also have some front end development experience with JavaScript/TypeScript/React.js or Angular You have strong analytical and problem solving skills You're collaborative with excellent communication skills What's in it for you: As a Backend Software Engineer/Developer … competitive package: Up to £80k salary Bonus Private Healthcare Pension 25 days holiday Apply now to find out more about this Backend Software Engineer/Developer (C# .Net Core React) opportunity. At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Haystack
aptitude and a genuine passion for sustainability. Key Responsibilities: Develop and maintain both frontend and backend components of digital solutions. Contribute to user interface development using technologies such as React.js, TypeScript, and Tailwind CSS. Support backend development using Python (Django/FastAPI) and Node.js (Express). Assist with database development and maintenance (PostgreSQL, MySQL, and optionally MongoDB/DynamoDB). More ❯
aptitude and a genuine passion for sustainability. Key Responsibilities: Develop and maintain both frontend and backend components of digital solutions. Contribute to user interface development using technologies such as React.js, TypeScript, and Tailwind CSS. Support backend development using Python (Django/FastAPI) and Node.js (Express). Assist with database development and maintenance (PostgreSQL, MySQL, and optionally MongoDB/DynamoDB). More ❯
in Computer Science, Computer Engineering or related field. It would be great if you have: Knowledge of DevOps tools, e.g. Jenkins, Sonar and CI/CD principles Experience with React/Angular frameworks Financial Services and/or Software Consulting experience We’re committed to providing our people with a great environment to work in. You can expect ongoing skills More ❯
Python - familiarity with these is a strong advantage. Solid knowledge of relational databases and proficiency in SQL (e.g., MySQL). Practical experience in modern front-end technologies including TypeScript, React, and CSS. Experience architecting solutions using cloud infrastructure, particularly AWS. Competency with standard development and collaboration tools (e.g., Git, GitLab, CI/CD workflows). Excellent communication and stakeholder management More ❯
based development in git. Experience with back-end web application frameworks (Django, FastAPI, etc) NICE TO HAVE Google Cloud (Cloud Functions, AppEngine, PubSub, Stackdriver, etc.) Docker, Kubernetes Typescript, NodeJS, React, Webpack etc. Java, C# Experience within the advertising/media agency space. Terraform If you are ready to be at the forefront of the AdTech industry, shaping its future, and More ❯
SFTP, JDBC, CSV, XML, JSON, XSL, encryption standards such as PGP, x509. Minimum 5 years of experience working on JavaScript, CSS3 and HTML5 and third-party libraries such as React Js, Angular, jQuery Minimum 5 years of experience working server-side programming languages such as Net, Java, Ruby and Python Minimum 5 years of experience in API development using web More ❯
Senior Full Stack Engineer London, UK - Fully Onsite Key Technologies: Java, JavaScript, React, Docker, Kubernetes Perm Role | £80,000 - £120,000 Harrington Starr has partnered with a leading financial institution on a mission to transform investment banking through cutting-edge technology. Their Investment Banking Middle Office Technology team plays a crucial role in enabling efficient trade management with institutional counterparties. … shape solutions Contribute to agile best practices Key Requirements: 5+ years of core Java development experience Expertise in microservices architectures (Spring Boot, Docker, Kubernetes) Strong experience with GUI technologies (React, TypeScript, HTML5) Experience in full SDLC (Git, Maven, Bamboo) Strong understanding of modern software design & architecture A proactive mindset and a collaborative approach Key Benefits: Private pension plan Up to More ❯
