At a Glance
- Tasks: Lead the frontend development of an innovative AI knowledge assistant for maritime shipping.
- Company: Join Complexio, a forward-thinking tech company revolutionising enterprise AI.
- Benefits: Enjoy a competitive salary, flexible work options, and opportunities for professional growth.
- Other info: Work in a flat organisation where engineers drive decisions and innovation.
- Why this job: Shape the future of enterprise AI UX and make a real impact on product direction.
- Qualifications: 5+ years of frontend experience with strong product sense and real-time UI skills.
The predicted salary is between 48000 - 72000 £ per year.
Complexio is building Stevie — an enterprise AI knowledge assistant that gives executives and operators a complete view of their organization through knowledge graphs. Our customers are large maritime shipping companies managing hundreds of vessels, thousands of daily emails, and complex commercial operations.
We are looking for a Senior or Lead Frontend Engineer to own Stevie's frontend. The interface is the product — it determines whether enterprise customers trust the intelligence, get value quickly, and come back. You will shape all of that.
Why This Role
Enterprise AI UX is unsolved. You won’t copy patterns — you’ll create them. Citations from knowledge graphs, streaming AI responses that feel trustworthy, confidence indicators on operational intelligence. You own the full frontend. No separate frontend team. You are it — with real influence on product direction and architectural decisions. Flat org, real impact. Domain owners have authority. Engineering decisions are made by engineers, not managers. You’ll own the full frontend — conversational AI interfaces, content feeds, document generation, collaborative features. The product is evolving fast and you’ll shape what gets built and how.
Must-haves
- 5+ years of frontend experience in production. You understand rendering models, performance characteristics, and architectural patterns deeply.
- Strong product sense. You push back when the UX doesn’t make sense. You’ve shipped real user-facing products.
- Real-time/streaming UI experience. WebSockets, SSE, or similar live data patterns.
- Comfort with ambiguity. You take vague problems and turn them into concrete frontend solutions.
- You ship. End-to-end — prototype to production to iteration on feedback.
Strong signals
- Enterprise/B2B SaaS. You know the difference between consumer UX and building for a CFO who needs to trust a number.
- AI product experience. Latency UX, citation rendering, hallucination presentation.
- Design sensibility. Polished interfaces without a designer in the room.
- Backend literacy. You can read a REST API and collaborate with backend engineers on data contracts.
- Startup experience. Small teams, multiple hats, fast without cutting corners.
How We Work
- Direct communication. Honest feedback, hard questions, no hiding behind process.
- Ownership over tasks. You’re asked what you shipped and learned, not to fill out status reports.
- Speed with quality. We ship fast because we scope well. Customer feedback cycles are weeks, not quarters.
- AI-augmented workflow. We use AI tools extensively and expect you to be comfortable with AI-assisted development.
Lead Full-Stack Engineer employer: Complexio
At Complexio, we pride ourselves on being an exceptional employer that fosters a culture of innovation and ownership. As a Lead Full-Stack Engineer, you will have the unique opportunity to shape the future of enterprise AI while working in a flat organisational structure that values direct communication and rapid feedback. With a focus on employee growth and the use of cutting-edge AI tools, we empower our team members to take charge of their projects and make a real impact in the maritime shipping industry.
StudySmarter Expert Advice🤫
We think this is how you could land Lead Full-Stack Engineer
✨Tip Number 1
Network like a pro! Reach out to folks in your industry on LinkedIn or at meetups. We all know that sometimes it’s not just what you know, but who you know that can get you in the door.
✨Tip Number 2
Show off your skills! Create a portfolio or GitHub repo showcasing your projects. We want to see what you can do, especially if you’ve built something that aligns with enterprise AI or real-time UI.
✨Tip Number 3
Prepare for those interviews! Research the company and their products, especially Stevie. We need to see that you understand the challenges of building trust in AI interfaces and how you can contribute.
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, we love seeing candidates who take that extra step to connect directly with us.
We think you need these skills to ace Lead Full-Stack Engineer
Some tips for your application 🫡
Show Your Passion for AI and UX:When you're writing your application, let your enthusiasm for AI and user experience shine through. We want to see how you can contribute to creating innovative solutions that make a real impact in the enterprise space.
Highlight Your Frontend Experience:Make sure to detail your frontend experience clearly. We’re looking for someone with at least 5 years in production, so share specific projects where you've shaped user-facing products and tackled complex challenges.
Demonstrate Your Problem-Solving Skills:We love candidates who can turn vague problems into concrete solutions. Use your application to showcase examples of how you've navigated ambiguity and delivered effective frontend solutions in the past.
Apply Through Our Website:Don’t forget to apply through our website! It’s the best way for us to receive your application and ensures you’re considered for this exciting opportunity to shape Stevie's frontend.
How to prepare for a job interview at Complexio
✨Know Your Frontend Inside Out
Make sure you brush up on your frontend knowledge, especially around rendering models and performance characteristics. Be ready to discuss your past projects where you've tackled complex UI challenges, as this will show your depth of experience.
✨Showcase Your Product Sense
Prepare examples of how you've pushed back on UX decisions in the past. This role requires a strong product sense, so be ready to explain how you ensure that user-facing products are not just functional but also intuitive and trustworthy.
✨Embrace Ambiguity
Expect to face vague problems during the interview. Think about how you can turn these into concrete solutions and be prepared to share your thought process. This will demonstrate your ability to thrive in a fast-paced, evolving environment.
✨Highlight Your Collaboration Skills
Since you'll be working closely with backend engineers, be ready to discuss your experience with REST APIs and how you've collaborated on data contracts. This shows that you can bridge the gap between frontend and backend, which is crucial for this role.
