At a Glance
- Tasks: Join a high-growth AI startup and build cutting-edge software solutions.
- Company: Dynamic AI-native startup in Central London with a strong engineering culture.
- Benefits: Competitive salary, equity options, and a fast-paced work environment.
- Other info: Work fully onsite in a collaborative, elite team focused on rapid growth.
- Why this job: Make a real impact on innovative AI projects alongside industry leaders.
- Qualifications: 5+ years in software engineering with strong product instincts and technical skills.
The predicted salary is between 80000 - 100000 £ per year.
My client, a high-growth AI-native startup based in Central London, is looking for an exceptional Senior Backend or Full-Stack Engineer to join their core engineering team. This is a rare opportunity to join an engineering-led company at an early but high-traction stage, working directly on business-critical AI and communications infrastructure used in real-world production environments. The company operates as a genuinely AI-native engineering organisation. AI tooling, LLM-powered workflows, and rapid iteration are deeply embedded into how the team builds products day-to-day. The engineering culture is highly execution-focused, fast-moving, and extremely hands-on.
They are specifically looking for engineers operating at roughly Meta E5/E6 level (or equivalent from companies such as Meta, WhatsApp, Shopify, Stripe, Revolut, Deliveroo, etc.) with strong product engineering instincts and deep technical ability. The ideal candidate is a highly capable senior engineer who combines startup velocity with strong systems thinking and enjoys operating in high-ownership environments. You will work directly alongside the CTO (ex-JP Morgan) and Head of Engineering (ex-Meta) on core architecture, product direction, and scaling challenges.
Requirements:
- 5+ years of software engineering experience in high-performance production environments
- Experience building scalable distributed systems and production infrastructure
- Strong product engineering mindset with ability to move quickly and own features end-to-end
- Experience with TypeScript / Node.js strongly preferred
- Experience with modern frontend frameworks (React / Next.js) is a plus for full-stack candidates
- Strong understanding of system design, reliability, scalability, and observability
- Experience in startups or fast-paced product environments is highly desirable
- AI-native mindset — comfortable leveraging AI tooling and rapid iteration workflows
- Strong communication skills and ability to operate autonomously
- European language skills required (Spanish strongly preferred)
- Must already have right to work in the UK or Europe — visa sponsorship is not available outside Europe
- Must be willing to work fully onsite from the company’s Central London office
Tech Environment:
- AI-native workflows and internal LLM tooling
- Distributed systems and real-time infrastructure
- Modern cloud-native infrastructure and observability stack
What they offer:
- High-ownership environment with direct impact on product and architecture
- Small, elite engineering team
- Direct collaboration with experienced leadership (ex-Meta / ex-JP Morgan)
- Centrally located Marylebone office
- Fast-moving, ambitious startup environment with strong backing
This role is ideal for engineers who want to build quickly, solve difficult technical problems, and help shape the foundations of a high-growth AI company from an early stage. To apply, please send your CV or contact gala.santaballa@mondrian-alpha.com directly.
Senior Backend / Full-Stack Engineer (E5/E6 Level) – AI-Native Startup – Strong Comp + Equity employer: Mondrian Alpha
Join a high-growth AI-native startup in Central London, where you'll be part of an elite engineering team that thrives on innovation and rapid iteration. With a strong focus on ownership and direct impact on product architecture, this role offers exceptional growth opportunities alongside experienced leaders from top-tier companies. Enjoy a dynamic work culture that values collaboration and creativity, all while being centrally located in the vibrant Marylebone area.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Backend / Full-Stack Engineer (E5/E6 Level) – AI-Native Startup – Strong Comp + Equity
✨Tip Number 1
Network like a pro! Reach out to your connections in the tech industry, especially those who might know someone at the startup. A personal introduction can make all the difference in getting your foot in the door.
✨Tip Number 2
Show off your skills! If you have a portfolio or GitHub with projects that highlight your experience with TypeScript, Node.js, or any relevant tech, make sure to share it. It’s a great way to demonstrate your capabilities beyond just a CV.
✨Tip Number 3
Prepare for technical interviews by brushing up on system design and scalability concepts. Given the fast-paced environment of this AI-native startup, they’ll want to see how you think on your feet and tackle real-world problems.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, it shows you’re genuinely interested in joining their team.
We think you need these skills to ace Senior Backend / Full-Stack Engineer (E5/E6 Level) – AI-Native Startup – Strong Comp + Equity
Some tips for your application 🫡
Tailor Your CV:Make sure your CV reflects the skills and experiences that align with the job description. Highlight your experience in high-performance production environments and any relevant projects that showcase your product engineering mindset.
Showcase Your Technical Skills:Don’t just list your technical skills; demonstrate them! Include specific examples of how you've used TypeScript, Node.js, or modern frontend frameworks like React/Next.js in your previous roles. This will help us see your hands-on experience.
Communicate Clearly:Strong communication skills are key for this role. When writing your application, be clear and concise about your achievements and how they relate to the position. We want to understand your thought process and how you approach problem-solving.
Apply Through Our Website:We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures it gets into the right hands quickly. Plus, it shows your enthusiasm for joining our team!
How to prepare for a job interview at Mondrian Alpha
✨Know Your Tech Stack Inside Out
Make sure you’re well-versed in TypeScript, Node.js, and any modern frontend frameworks like React or Next.js. Brush up on your knowledge of distributed systems and production infrastructure, as these are crucial for the role. Be ready to discuss your past experiences with these technologies and how they relate to the company's AI-native environment.
✨Showcase Your Problem-Solving Skills
Prepare to discuss specific challenges you've faced in high-performance production environments. Think about how you approached these problems, the solutions you implemented, and the impact they had. This will demonstrate your strong product engineering mindset and ability to operate in fast-paced settings.
✨Emphasise Your Startup Experience
Since the company thrives in a startup culture, highlight your experiences in similar environments. Talk about how you’ve taken ownership of projects, worked autonomously, and contributed to rapid iterations. This will show that you can adapt quickly and thrive in their execution-focused culture.
✨Communicate Effectively
Strong communication skills are key for this role. Practice articulating your thoughts clearly and concisely, especially when discussing technical concepts. Be prepared to explain your ideas and decisions in a way that’s accessible to both technical and non-technical stakeholders, as you’ll be working closely with leadership.
