At a Glance
- Tasks: Lead the design and development of scalable AI systems and workflows.
- Company: Join a rapidly growing tech company at the forefront of AI innovation.
- Benefits: Competitive salary up to £220k, flexible work options, and career growth opportunities.
- Other info: Dynamic environment with a focus on mentorship and hands-on coding.
- Why this job: Make a real impact in AI by shaping the future of technology.
- Qualifications: Extensive experience in software architecture and proficiency in modern programming languages.
This role is with one of Dex's trusted partner companies.
We work closely with their teams to truly understand their culture, goals, and what they're looking for, so we can match you with the right opportunity and give you context about the role before you commit to a process.
The role
AI agents need to learn.
This lab builds the interactive, resettable digital environments where they do it: navigating software, completing tasks, learning from failure, and improving through trial and error.
This isn't just research; it's about generating the experiential data that trains increasingly capable AI systems.
They've raised significant funding and work directly with frontier AI labs, growing rapidly with a team from leading tech companies and successful startups.
This is a Staff or Principal Software Engineer role, offering genuine technical authority without disconnecting you from the code.
You'll own major platform areas, from technical direction to production delivery, designing scalable systems for AI simulation, data generation, and agent workflows.
This isn't a ticket-crunching role; it's about leading architecture across distributed systems and data-intensive infrastructure, turning ambiguous problems into clear plans, and guiding other engineers.
You'll stay deeply hands-on, helping the team make better decisions and improving engineering practices as the organisation scales.
- The work
- Own the technical direction and production delivery for major platform areas, from concept to deployment.
- Design and build scalable distributed systems for AI simulation, data generation, and agent workflow orchestration.
- Lead architectural decisions across backend services and data-intensive infrastructure, ensuring reliability and performance at scale.
- Translate ambiguous technical and business challenges into clear, actionable engineering plans.
- Drive improvements in engineering practices: testing, observability, deployment, and overall system reliability.
What You Bring
- You have extensive experience building and operating complex production systems, with a strong background in architecture and system design.
- You've led large, ambiguous engineering initiatives, designing distributed systems, data platforms, or complex technical workflows.
- You are proficient in one or more typed languages (e. g., Type Script, Go, Java, Rust) and have a deep understanding of cloud architecture (AWS or GCP).
- You can provide technical direction and mentorship while remaining deeply hands-on, actively contributing to code and reviews.
- You thrive in fast-changing environments, making pragmatic trade-offs around scalability, reliability, and delivery speed.
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Staff / Principal Software Engineer, AI Platform (up to £220k) employer: Dex
At Dex, we pride ourselves on being an exceptional employer, offering a dynamic work culture that fosters innovation and collaboration. Our London-based team enjoys a hybrid working model, competitive benefits, and ample opportunities for professional growth, all while contributing to cutting-edge technology in the healthcare sector. Join us to make a meaningful impact in real-time systems and edge deployment, surrounded by a supportive team dedicated to excellence.
StudySmarter Expert Advice🤫
We think this is how you could land Staff / Principal Software Engineer, AI Platform (up to £220k)
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Dex or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Dex.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Dex.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Dex that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Staff / Principal Software Engineer, AI Platform (up to £220k)
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Dex.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Dex and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at Dex
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Dex uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
