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- Tasks: Craft next-gen web applications and user experiences for enterprise AI.
- Company: Join Complexio, a pioneering tech company transforming AI in industry.
- Benefits: Enjoy professional growth, a collaborative team, and a dynamic work environment.
- Why this job: Shape how thousands engage with cutting-edge AI technology.
- Qualifications: Advanced React, TypeScript skills, and strong JavaScript fundamentals required.
- Other info: Fast-paced, technical team with opportunities for continuous learning.
The predicted salary is between 36000 - 60000 Ā£ per year.
At Complexio, we're building the intelligence layer for enterprise AIāautomatically creating a connected understanding of an organisation's people, processes and systems, and turning that into realātime 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 enterpriseāusers engage with our platform. You'll work with a team of software engineers, data scientists, product experts and business analysts to craft nextāgeneration web applications and user experiences that bring our powerful automation engine to life. Your role will be foundational in translating dataārich insights into intuitive, performant, and scalable interfacesābridging the gap between advanced AI infrastructure and realāworld business impact.
If you are passionate about working at the intersection of rich frontāend engineering, fullāstack product delivery and enterprise AI innovation, and you thrive in a fastāmoving, 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 LLMābased features (streaming, prompts, AIādriven UI)
- Testing with Vitest/Jest + React Testing Library
- Good UX instincts & ability to work independently
MustāHaves (fullāstack focus)
- Python backend familiarity (FastAPI/async I/O, API contracts)
NiceātoāHaves
- 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
- Eventādriven 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
Job Details
- Seniority level: MidāSenior level
- Employment type: Fullātime
- Industries: Technology, Information and Internet
Senior Full Stack Engineer (Frontend Focus) in London employer: Complexio
Contact Detail:
Complexio Recruiting Team
StudySmarter Expert Advice š¤«
We think this is how you could land Senior Full Stack Engineer (Frontend Focus) in London
āØTip Number 1
Network like a pro! Reach out to folks in your industry on LinkedIn or at meetups. A personal connection can often get you a foot in the door faster than any application.
āØTip Number 2
Show off your skills! Create a portfolio showcasing your projects, especially those that highlight your frontend expertise. This gives potential employers a taste of what you can do.
āØTip Number 3
Prepare for interviews by practising common technical questions and coding challenges. We recommend using platforms like LeetCode or HackerRank to sharpen your skills.
āØTip Number 4
Donāt forget to apply through our website! Itās the best way to ensure your application gets seen by the right people. Plus, we love hearing from passionate candidates like you!
We think you need these skills to ace Senior Full Stack Engineer (Frontend Focus) in London
Some tips for your application š«”
Tailor Your CV: Make sure your CV reflects the skills and experiences that align with the Senior Full Stack Engineer role. Highlight your expertise in React, TypeScript, and any relevant projects that showcase your frontend focus.
Craft a Compelling Cover Letter: Use your cover letter to tell us why you're passionate about enterprise AI and how your background makes you a great fit for our team. Share specific examples of your work that demonstrate your ability to create intuitive user experiences.
Showcase Your Projects: If you've worked on any notable projects, especially those involving scalable UI or integrating with APIs, make sure to include them in your application. We love seeing real-world applications of your skills!
Apply Through Our Website: We encourage you to apply directly through our website. Itās the best way for us to receive your application and ensures you donāt miss out on any important updates from our team.
How to prepare for a job interview at Complexio
āØKnow Your Tech Stack Inside Out
Make sure youāre well-versed in React, TypeScript, and JavaScript fundamentals. Brush up on async programming, modules, and performance optimisation techniques. Being able to discuss your experience with modern tooling like Vite and ESLint will show that youāre not just familiar but also passionate about the tech youāll be using.
āØShowcase Your Problem-Solving Skills
Prepare to discuss specific challenges you've faced in previous projects, especially around building scalable UIs or integrating with REST APIs. Use examples that highlight your ability to write maintainable code and conduct thorough code reviews. This will demonstrate your practical experience and thought process.
āØDemonstrate Your UX Instincts
Since the role involves crafting user experiences, be ready to talk about your approach to UX design. Share examples of how youāve translated complex data into intuitive interfaces. If you have experience with LLM-based features or performance debugging, make sure to mention those as they align closely with what Complexio is looking for.
āØAsk Insightful Questions
Prepare thoughtful questions about the team dynamics, the technology stack, and the companyās vision for AI integration. This shows your genuine interest in the role and helps you assess if itās the right fit for you. Plus, it gives you a chance to engage with the interviewers and make a memorable impression.
