Senior Full Stack Engineer (Frontend Focus)
Complexio
- London, England, United Kingdom
- London, England, United Kingdom
About
At Complexio, we’re building the intelligence layer for enterprise AI—automatically creating a connected understanding of an organisation’s people, processes and systems, and turning that into real-time automation and insight. Our platform ingests structured and unstructured data, constructs a living Event Knowledge Graph, and orchestrates multiple AI models to uncover hidden workflow opportunities and drive autonomous action.
As a Senior Frontend Full Stack Engineer, you will join us at an exciting inflection point: you’ll help shape the way thousands of enterprise-users engage with our platform. You’ll work with a team of software engineers, data scientists, product experts and business analysts to craft next-generation web applications and user experiences that bring our powerful automation engine to life. Your role will be foundational in translating data-rich insights into intuitive, performant, and scalable interfaces—bridging the gap between advanced AI infrastructure and real-world business impact.
If you are passionate about working at the intersection of rich front‑end engineering, full‑stack product delivery, and enterprise AI innovation, and you thrive in a fast‑moving, deeply technical team, then we’d love to hear from you.
Requirements
React + TypeScript (advanced)
Strong JavaScript fundamentals (async, modules, performance)
Experience with Vite, ESLint, modern tooling
Building scalable UI with components, hooks, and context
Integrating with REST APIs, async flows, error handling
Writing maintainable code + strong code review skills
Familiar with LLM‑based features (streaming, prompts, AI‑driven UI)
Testing with Vitest/Jest + React Testing Library
Good UX instincts & ability to work independently
Must‑Haves (Full‑Stack)
Python backend familiarity (FastAPI/async I/O, API contracts)
Nice‑to‑Haves
Experience with Electron apps (main/renderer, preload, IPC)
React Query / Zustand or other state libraries
Advanced TypeScript patterns (generics, mapped types)
Performance debugging (React Profiler, bundle optimization)
Knowledge of Radix/shadcn/ui or similar component libraries
Node.js fundamentals
Event‑driven systems familiarity
Benefits
Join a pioneering joint venture at the intersection of AI and industry transformation.
Work with a diverse and collaborative team of experts from various disciplines.
Opportunity for professional growth and continuous learning in a dynamic field.
Seniority level Mid‑Senior level
Employment type Full‑time
Job function Engineering and Information Technology
Industry Software Development
Referrals increase your chances of interviewing at Complexio by 2x
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Languages
- English
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