and proficient in English, written and spoken. Proficiency with TypeScript, Next.js, Node.js and React Native. Experience deploying to Google Cloud, Vercel, or other cloud providers. Comfort working across REST, WebSockets, GraphQL, or gRPC APIs. Ability to architect and maintain scalable, secure systems with a clean codebase. Experience working with CI/CD pipelines, version control (Git), and Agile methodologies. Organised More ❯
on with component libraries, monorepo tools (e.g., Nx, Turborepo), and state management (MobX, Zustand, Redux, or React Query). Familiar with REST, GraphQL, and real-time data streaming (e.g., WebSockets, SSE). Experience building for multi-tenant, micro-frontend architectures (preferred). Nice to Have Familiarity with accessibility standards (WCAG 2.1) and implementation of ARIA roles and semantic HTML. Experience More ❯
processes and much wanted user experience improvements; all to drive more business safely. You must have a successful experience developing real-time web front ends using both REST and websockets APIs. We are particularly looking for developers with an excellent knowledge and understanding of the software engineering fundamentals as well as strong solution design skills promoting simplicity, stability, performance and More ❯
an expert at building web apps. You have a track record of building responsive and performant public facing web applications, with a solid understanding of HTTP protocols, REST APIs, websockets, DOM manipulation. You operate across the stack . You have significant experience working with relational databases, knowledge of web and service authentication and web security best practices. You can architect More ❯
of best practices regarding performance, accessibility, and frontend security. Additionally, any of the following qualifications may help a candidate stand out: Experience in advanced web technologies such as WebGL, WebSockets, WebAssembly, web workers, and PWAs, Experience in UI and UX design, Experience in implementing sophisticated CSS animations Experience with Kubernetes Track record of delivering user-facing software at scale. Interview More ❯
Camel DevOps: Gitlab CI/CD, Ansible, Observability/Telemetry Unix: bash scripting, system and process monitoring Cloud: Experience with AWS, S3 Web: HTML5 frameworks: React, Redux, SSE/Websockets, CSSBootstrap Career Growth and Learning Opportunities Great opportunity to be at the intersection of business and technology. Gaining in-depth knowledge of both Cash Prime Brokerage and Synthetic Prime Brokerage More ❯
of best practices regarding performance, accessibility, and frontend security. Additionally, any of the following qualifications may help a candidate stand out: Experience in advanced web technologies such as WebGL, WebSockets, WebAssembly, web workers, and PWAs, Experience in UI and UX design, Experience in implementing sophisticated CSS animations. Experience with Kubernetes. Location We hire engineers in London and in Palo Alto. More ❯
inner workings and best practices You excel at UI/UX design implementation experience, creating pixel-perfect, accessible interfaces You have a solid understanding of HTTP protocols , REST APIs , websockets , and DOM manipulation You understand web security best practices and frontend authentication patterns You have an eye for design and track record of creating intuitive and innovative interfaces You're More ❯
happen, a real entrepreneurial spirit Bonus points Familiarity with building on the cloud AWS services - we use over 30 AWS services Experience working with ML technologies Protocols such as websockets and XMPP What you'll accomplish Collaborating on building new product features for our members. Building highly secure services (we handle sensitive personal data). Improving performance with investigative work. More ❯
happen, a real entrepreneurial spirit Bonus points Familiarity with building on the cloud AWS services - we use over 30 AWS services Experience working with ML technologies Protocols such as websockets and XMPP What you'll accomplish Collaborating on building new product features for our members. Building highly secure services (we handle sensitive personal data). Improving performance with investigative work. More ❯
make things happen, a real entrepreneurial spirit. Familiarity with building on the cloud AWS services - we use over 40 AWS services. Experience working with ML technologies. Protocols such as websockets and XMPP. What you'll accomplish Collaborating on building new product features for our members. Building highly secure services (we handle sensitive personal data). Improving performance with investigative work. More ❯
cloud infrastructure in AWS environments Experience performing database and database infrastructure support for highly available systems Working knowledge of TLS Demonstrated knowledge of network communications protocols, including multicast and WebSockets Experience using Ansible and Terraform to manage infrastructure Flexibility to take off-hours support calls and meetings as needs dictate Ability to learn quickly; a passion for new technology Self More ❯
JavaScript and ES6+. Thoroughly experienced with React, React-Native (mainly around Expo), Redux and the core principles surrounding these. Familiar with modern front-end pipelines and tools. Experienced with WebSockets, RESTful based APIs. Interested in bringing diverse, innovative applications to life. Interested in modernizing and optimizing different mobile or web applications. Knowledge in native languages (Swift/Kotlin) and familiarity More ❯
environment. Proficiency in Python, Rust is a bonus. Proficiency in Unix based systems. Experience of cloud-based platforms (e.g. AWS). Experience with real-time data messaging (e.g. Redis, websockets). Experience with deployment and monitoring tools, e.g. supervisor, dockers, Grafana, Nagios, etc. Excellent problem-solving skills and attention to detail. Bachelor's or Master's degree in Computer Sciences More ❯
working with frontend web apps using a framework like NextJS Proficiency in writing safe, strict and well tested code in Typescript Seasoned experience with different protocols like HTTP and websockets Used to developing complex services from requirements to shipping Willing to learn new skills and really get stuck in Bags of common sense with the raw ability and energy to More ❯
out and coordinate where possible Specific experience that will make you stand out from other candidates Experience with Next.JS Experience building highly interactive frontends, ideally text editors Experience with websockets What we offer Diverse and internationally distributed team : joining our team means becoming part of a large, global community with people of more than 90 nationalities. We're more than More ❯
Senior UI Engineer - £120,000 – On-site (Central London) Overview We are hiring a Senior UI Engineer to join a high-performance technology team within a leading financial services organisation operating in the oil and energy derivatives space. The business More ❯
Required Skills & Experience Proven experience delivering front-end applications in electronic trading environments Strong understanding of performance optimisation and low-latency UI design Experience with real-time data technologies (WebSockets, FIX, etc.) Familiarity with containerized front-end platforms such as OpenFin is a plus Prior exposure to Fixed Income products (Rates, Credit, Bonds) or other capital markets Experience in data More ❯
experience in solution engineering or technical pre-sales, ideally in developer-first or infrastructure platforms. A working knowledge of event-driven systems, pub/sub messaging, and protocols like WebSockets, SSE, or MQTT. An ability to translate complex customer architectures into elegant, scalable solutions powered by Ably. Experience crafting tailored demos, prototypes, and PoCs that align with customer use cases More ❯
NO AGENCIES - Please do not attempt to canvas from here We are a highly successful UK-based Events Management SaaS company looking for an ambitious PHP Technology/Software Architect to help oversee the next phase of development of our More ❯
We are seeking a highly skilled and motivated front end application developer to play a role on a greenfield multiyear transformation program aimed at modernizing and scaling the electronic FX Options Trading Business Responsibilities: Be part of a team of More ❯
The Trading Infrastructure team is building a high-performance, front-to-back Trading Platform that supports multi-asset trading. The platform is designed to handle financial instruments with low-latency execution, robust risk controls, and seamless integration across trading, risk More ❯
management, data masking, and audit logging. Translate UX/UI designs into modular, reusable components aligned with enterprise design systems. Integrate front-end applications with REST/GraphQL APIs, WebSockets, and backend services. Collaborate closely with AI engineers, backend developers, and cloud architects to deliver end-to-end solutions. Ensure compliance with cybersecurity and data privacy standards through secure coding … greenfield or innovation lab settings. Experience developing interactive UIs, dashboards, chat interfaces, and data visualisations for AI-powered tools. Skilled in integrating front-end applications with APIs (REST, GraphQL, WebSockets) and backend services. Deep understanding of front-end security practises (e.g., OWASP, CSP, input sanitization, role-based access). Familiarity with secure API design, token management, and data privacy obligations More ❯
London, South East, England, United Kingdom Hybrid / WFH Options
Pontoon
management, data masking, and audit logging. Translate UX/UI designs into modular, reusable components aligned with enterprise design systems. Integrate front-end applications with REST/GraphQL APIs, WebSockets, and backend services. Collaborate closely with AI engineers, backend developers, and cloud architects to deliver end-to-end solutions. Ensure compliance with cybersecurity and data privacy standards through secure coding … greenfield or innovation lab settings. Experience developing interactive UIs, dashboards, chat interfaces, and data visualisations for AI-powered tools. Skilled in integrating front-end applications with APIs (REST, GraphQL, WebSockets) and backend services. Deep understanding of front-end security practises (e.g., OWASP, CSP, input sanitization, role-based access). Familiarity with secure API design, token management, and data privacy obligations More ❯
