Senior Full Stack Engineer (Frontend Focus)

Our client is a leader in capital markets technology, delivering cutting-edge AI and web solutions to revolutionize financial data processing and decision-making within financial ecosystems.

• Minimum of 6 years of experience in full-stack development with focus on Python and JavaScript.
• Strong expertise in React, TypeScript, and modern JavaScript (ES6+).
• Proven experience with back-end frameworks such as FastAPI, Django, or Flask.
• Solid understanding of REST API design, asynchronous data handling, and front-end best practices.
• Familiarity with HTML5, CSS3, and responsive UI design.
• Knowledge of relational and NoSQL databases like PostgreSQL and MongoDB.
• Strong grasp of Git and collaborative development workflows.
• Good understanding of web security, performance, and accessibility fundamentals.

Nice to have:

• Production experience with Next.js (SSR, SSG, API routes).
• Hands-on experience building or integrating AI/LLM features (e.g., prompt engineering, vector databases, LangChain, LlamaIndex).
• Experience working with Claude and other AI solutions.
• Familiarity with state management libraries (Redux, React Query).
• Knowledge of CSS frameworks like Tailwind or styled-components.
• Experience with cloud deployment, infrastructure (AWS, GCP), Docker, and CI/CD pipelines.
• Testing expertise with Pytest, Jest, React Testing Library, or Cypress.

• Design and develop end-to-end features including React/Next.js interfaces and Python back-end services and APIs.
• Implement, maintain, and optimize AI/LLM-powered functionalities such as RAG pipelines, agentic workflows, and API integrations.
• Build responsive, accessible user interfaces from design specifications to production deployment.
• Write clean, well-tested, and maintainable code across both front-end and back-end layers.
• Design and implement REST/GraphQL APIs and data models for complex financial and market data.
• Collaborate with designers, data/ML engineers, and product managers to deliver features end-to-end.
• Optimize applications for performance, scalability, security, and cross-browser compatibility.
• Participate in code reviews and contribute to engineering standards and best practices.
• Leverage AI-assisted development tools to accelerate delivery and enhance code quality.

Only candidates with an existing legal right to work in the European Union will be considered.