At a Glance
- Tasks: Design and build innovative software solutions that transform enterprise workflows.
- Company: Join Zalos, a pioneering tech startup focused on revolutionising enterprise software.
- Benefits: Competitive salary, hands-on experience, and direct collaboration with founders.
- Other info: Work in a dynamic team with excellent growth opportunities and no management barriers.
- Why this job: Own your projects and make a real impact in a fast-paced startup environment.
- Qualifications: Experience in AI-powered features and strong problem-solving skills.
The predicted salary is between 60000 - 80000 £ per year.
As Zalos's Founding Full-Stack Engineer, your job is to build the product experience that makes this real. You'll be designing and shipping the application surfaces, backend services, and workflow infrastructure that turn messy enterprise work into correct, auditable action across systems of record. This is a hard, important part of the product. It's entirely yours to own.
What we’re building
Enterprise software was built to store data and enforce process. It was never built to be used by humans who have better things to do. The result: highly trained people wasting hours every day fighting screens instead of doing the actual work.
Intent-to-action: A user describes an outcome. Zalos figures out which systems to touch, in which order, with which data, and executes it with the right approvals and a clean audit trail.
Cross-system workflows: Event-driven chains that span SAP, Salesforce, and ServiceNow simultaneously.
Computer-use for the long tail: Not every enterprise workflow has a reliable API. We use computer-use agents to automate the 30 to 40 percent of processes that live in screens, VDI sessions, and legacy thick clients.
What you'll work on
- Design and own the core agent architecture: how we take a natural language intent, decompose it into steps, call the right APIs and UI agents, handle failures gracefully, and close the loop with the user.
- Build reliable, production-grade LLM pipelines covering context management, tool use, structured outputs, and multi-step reasoning across systems with real enterprise data.
- Work directly with the founders and customers to understand where AI fails in real enterprise workflows and translate that into better systems.
- Set the technical standards for how we build AI at Zalos.
Must haves
- You’ve shipped AI-powered features that real users depend on in production. You know what breaks and how to prevent it.
- Deep hands-on experience with LLM APIs, agentic patterns, and tool/function calling.
- You think about reliability, latency, and cost as first-class engineering concerns, not afterthoughts.
- You build tests/evals before you ship, not after something breaks in front of a customer.
- High ownership: you take something from an ambiguous problem statement to a clean, working solution with minimal hand-holding.
- You’re pragmatic. Startups are always on fire somewhere. You know when to let something burn and when to drop everything.
Nice to haves
- Computer-use or browser automation work with tools like Playwright, browser agents, or UI parsing.
- Fine-tuning or RLHF on domain-specific tasks.
- Prior founding engineer or early-stage startup experience.
The team you’ll work with
You’ll work directly with the founders from day one. No engineering manager in the way, no sprint planning theatre.
Founding Full-Stack Engineer London, UK • In office employer: Zalos Limited
At Zalos, we pride ourselves on fostering a dynamic and innovative work culture where every team member has the opportunity to make a significant impact from day one. As a Founding Full-Stack Engineer in London, you'll collaborate directly with the founders and have the autonomy to shape our AI-driven product, all while enjoying a supportive environment that prioritises employee growth and development. With a focus on meaningful work and cutting-edge technology, Zalos offers a unique chance to be part of a transformative journey in enterprise software.
StudySmarter Expert Advice🤫
We think this is how you could land Founding Full-Stack Engineer London, UK • In office
✨Tip Number 1
Network like a pro! Reach out to people in your industry on LinkedIn or at local 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
Prepare for those interviews! Research the company and its products, especially if they’re working on AI and enterprise software. We want you to show them you’re not just another candidate, but someone who truly gets their mission.
✨Tip Number 3
Show off your projects! If you’ve built anything relevant, whether it’s a personal project or something from a previous job, make sure to discuss it. We love seeing how you’ve tackled real-world problems with your skills.
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, we’re always looking for passionate individuals who want to make a difference in the enterprise software space.
We think you need these skills to ace Founding Full-Stack Engineer London, UK • In office
Some tips for your application 🫡
Show Your Passion for Problem-Solving:When you write your application, let us see your enthusiasm for tackling complex problems. Share examples of how you've turned ambiguous challenges into clear solutions, especially in the realm of AI and enterprise software.
Highlight Your Hands-On Experience:Make sure to detail your experience with LLM APIs and any AI-powered features you've shipped. We want to know what you've built and how it’s made a difference for users. Don’t hold back on the specifics!
Demonstrate Your Pragmatic Approach:In your application, give us a glimpse of your pragmatic mindset. Talk about times when you had to prioritise tasks in a fast-paced environment and how you decided what to focus on. We love a good story about managing chaos!
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 you don’t miss out on any important updates from our team. Let’s get started on this journey together!
How to prepare for a job interview at Zalos Limited
✨Know Your Tech Inside Out
Make sure you’re well-versed in the technologies mentioned in the job description, especially LLM APIs and agentic patterns. Be ready to discuss your past experiences with these tools and how you've tackled challenges in production environments.
✨Showcase Your Problem-Solving Skills
Prepare to share specific examples of how you've taken ambiguous problems and turned them into clean, working solutions. Highlight your thought process and the steps you took to ensure reliability and efficiency in your projects.
✨Understand the User's Perspective
Since Zalos focuses on improving user experience in enterprise software, be prepared to discuss how you’ve designed features with real users in mind. Think about how you can translate user needs into technical solutions that enhance workflow.
✨Demonstrate High Ownership
Emphasise your ability to take ownership of projects from start to finish. Share instances where you’ve had to make tough decisions, like knowing when to prioritise tasks or let something go, especially in a fast-paced startup environment.
