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- Tasks: Design and build scalable backend systems in a fast-paced environment.
- Company: Fast-growing tech start-up with a low-ego, high-performing culture.
- Benefits: Competitive salary, equity options, and direct access to leadership.
- Why this job: Make an impact from day one by shaping core infrastructure.
- Qualifications: Experience in backend systems and a collaborative mindset.
- Other info: Streamlined interview process and excellent career growth opportunities.
The predicted salary is between 70000 - 90000 £ per year.
My client, a fast-growing and well-backed technology company, is seeking multiple senior backend and platform engineers to join its London team. This is a unique opportunity to join a high-performing, low-ego engineering culture, working on complex, real-world systems with immediate ownership and impact. The team is focused on building and scaling core backend infrastructure and internal platforms that power critical business functionality. These roles sit at the intersection of backend engineering, distributed systems, and infrastructure, offering the chance to shape both technical direction and engineering standards within a rapidly evolving environment. You’ll be working closely with senior leadership and a small, highly capable team, contributing to the design, build, and optimisation of systems from the ground up.
Responsibilities:
- Design and build scalable backend systems and services in a high-availability environment
- Develop and improve core infrastructure, tooling, and internal platforms used across engineering teams
- Contribute to architectural decisions and help shape long-term technical direction
- Identify and resolve performance, reliability, and scalability challenges across systems
- Work cross-functionally to support and unblock multiple engineering teams
- Improve engineering workflows, system efficiency, and overall platform robustness
- Take ownership of key systems and deliver high-impact solutions from concept to production
- Collaborate closely with stakeholders in a fast-paced, iterative development environment
Requirements:
- Strong experience building backend or infrastructure systems at scale
- Solid understanding of distributed systems, performance, and reliability
- Experience working in high-quality engineering environments (e.g. leading tech firms or high-growth startups)
- Proven ability to take ownership and deliver complex systems end-to-end
- Comfortable working in fast-moving, ambiguous environments
- Strong problem-solving skills and systems thinking
- Collaborative mindset with a low-ego, team-first approach
Nice to have:
- Experience with real-time systems, messaging, or communications infrastructure
- Exposure to modern backend languages and frameworks (e.g. Elixir or similar functional paradigms)
- Background in platform engineering, developer infrastructure, or internal tooling
- Previous experience in startup or scaling environments
What You Can Expect:
- High levels of ownership and responsibility from day one
- Direct access to leadership and influence over technical direction
- A fast-moving, collaborative, and low-bureaucracy environment
- Strong engineering culture focused on impact and execution
- Competitive compensation with meaningful equity upside
- The opportunity to build systems from the ground up, rather than maintain legacy platforms
My client is looking to move quickly for the right individuals and offers a streamlined interview process (1 week maximum). To apply, either respond to this advert or send your CV directly to sasha.duquesne@mondrian-alpha.com.
Senior Backend / Platform Engineer – High-Growth SaaS Start-Up – Discrete Search – Excellent Compensation + Equity employer: Mondrian Alpha
Contact Detail:
Mondrian Alpha Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Senior Backend / Platform Engineer – High-Growth SaaS Start-Up – Discrete Search – Excellent Compensation + Equity
✨Tip Number 1
Network like a pro! Reach out to your connections in the tech industry, especially those who work at startups or in backend engineering. A personal referral can make all the difference in getting noticed by hiring managers.
✨Tip Number 2
Prepare for technical interviews by brushing up on your coding skills and system design knowledge. Practice common interview questions and scenarios that relate to backend systems and distributed architecture. We want you to shine!
✨Tip Number 3
Showcase your projects! Whether it's a GitHub repo or a personal website, having tangible examples of your work can really impress potential employers. Highlight any complex systems you've built or optimised, especially in high-availability environments.
✨Tip Number 4
Don’t forget to apply through our website! It’s the quickest way to get your application in front of the right people. Plus, we love seeing candidates who take the initiative to engage directly with us.
We think you need these skills to ace Senior Backend / Platform Engineer – High-Growth SaaS Start-Up – Discrete Search – Excellent Compensation + 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 backend engineering experience and any work with distributed systems, as these are key for us.
Craft a Compelling Cover Letter: Use your cover letter to tell us why you're excited about this role and how you can contribute to our team. Share specific examples of your past work that demonstrate your problem-solving skills and ownership mentality.
Showcase Your Technical Skills: Don’t shy away from listing your technical proficiencies, especially in modern backend languages or frameworks. If you have experience with real-time systems or platform engineering, make sure to mention it!
Apply Through Our Website: We encourage you to apply through our website for a smoother process. It helps us keep track of applications and ensures you don’t miss out on any important updates from us.
How to prepare for a job interview at Mondrian Alpha
✨Know Your Tech Inside Out
Make sure you’re well-versed in the backend technologies and frameworks mentioned in the job description. Brush up on distributed systems, performance optimisation, and any specific languages like Elixir. Being able to discuss your past experiences with these technologies will show that you’re not just a fit for the role, but also passionate about the work.
✨Showcase Your Problem-Solving Skills
Prepare to discuss specific challenges you've faced in previous roles and how you tackled them. Think of examples where you improved system efficiency or resolved scalability issues. This will demonstrate your ability to think critically and act decisively in high-pressure situations, which is crucial for this fast-paced environment.
✨Emphasise Collaboration and Ownership
Since the role involves working closely with senior leadership and cross-functional teams, be ready to share examples of how you’ve successfully collaborated in the past. Highlight instances where you took ownership of projects and drove them to completion, as this aligns perfectly with the company’s low-ego, team-first culture.
✨Ask Insightful Questions
Prepare thoughtful questions about the company's engineering culture, the challenges they face, and their vision for the future. This not only shows your genuine interest in the role but also gives you a chance to assess if the company aligns with your values and career goals. It’s a two-way street, after all!