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- Tasks: Build and scale innovative cloud security products using cutting-edge technologies.
- Company: Exciting Series A cloud security startup backed by top investors.
- Benefits: Competitive salary, equity options, and a dynamic work environment.
- Other info: Fast-paced growth with opportunities to shape the future of cloud security.
- Why this job: Join a high-impact team solving real-world security challenges for major clients.
- Qualifications: Experience in software development and a passion for collaborative problem-solving.
The predicted salary is between 60000 - 120000 £ per year.
Join a high‑calibre engineering team building the future of cloud intrusion detection. You will develop intelligent canary tripwires that protect massive clients like Riot Games and Docker. Working directly with the founders, you'll ship daily to process billions of events using a powerful stack of C#, .NET Core, and AWS.
Why this role is remarkable:
- Join one of the UK's most exciting startups, recently raising a $20M Series A led by FirstMark and featured on Sifted's 2025 "London Startups To Watch."
- Experience explosive growth with a company that doubled ARR last quarter and plans to triple its headcount over the next year.
- High‑impact work environment where you will solve real‑world problems, such as uncovering P1 security flaws in major AI platforms like Google Gemini.
What You Will Do:
- Build and scale a cloud‑native security product using C# on .NET Core 10, Terraform, and HTMX within an AWS environment.
- Collaborate face‑to‑face with technical founders and high‑profile customers to translate security research into robust, production‑ready detection features.
- Take ownership of end‑to‑end delivery in a low‑bureaucracy environment, shipping code daily and maintaining infrastructure as code for planetary‑scale event processing.
The ideal candidate:
- Proven track record of shipping software at scale or in critical environments, ideally within a product‑focused company or high‑growth startup.
- Strong proficiency in any object‑oriented language; while we use C#, we value architectural instinct and engineering quality over specific language syntax.
- A proactive builder who thrives in an on‑site, collaborative culture and is excited by the pace of an early‑stage company defining a new security category.
Founding Engineer (£60k-£120k + Equity) at $20M Series A cloud security startup in London employer: Jack & Jill
Contact Detail:
Jack & Jill Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Founding Engineer (£60k-£120k + Equity) at $20M Series A cloud security startup in London
✨Tip Number 1
Network like a pro! Reach out to people in the industry, attend meetups, and connect with potential colleagues on LinkedIn. The more you engage, the better your chances of landing that Founding Engineer role.
✨Tip Number 2
Show off your skills! Create a portfolio or GitHub repository showcasing your projects, especially those using C# and AWS. This gives you a chance to demonstrate your expertise and passion for cloud security.
✨Tip Number 3
Prepare for technical interviews by brushing up on your coding skills and system design principles. Practice common interview questions and scenarios related to cloud security to impress the founders.
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets noticed. Plus, it shows you're genuinely interested in being part of our exciting journey at this startup.
We think you need these skills to ace Founding Engineer (£60k-£120k + Equity) at $20M Series A cloud security startup in London
Some tips for your application 🫡
Tailor Your CV: Make sure your CV reflects the skills and experiences that align with our needs. Highlight your experience in cloud security, C#, and any relevant projects you've worked on. We want to see how you can contribute to our mission!
Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Share your passion for cloud security and why you're excited about joining our team. Let us know how your background makes you a perfect fit for this role.
Showcase Your Projects: If you've worked on any relevant projects, make sure to include them in your application. Whether it's a personal project or something from a previous job, we love seeing what you've built and how it relates to what we do.
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. Plus, it shows us you’re keen to join our team!
How to prepare for a job interview at Jack & Jill
✨Know Your Tech Stack
Make sure you’re well-versed in C#, .NET Core, and AWS. Brush up on your knowledge of cloud security concepts and be ready to discuss how you've used these technologies in past projects. This will show that you’re not just a fit for the role but also genuinely interested in the tech they’re using.
✨Showcase Your Problem-Solving Skills
Prepare examples of how you've tackled complex problems in previous roles, especially in high-pressure environments. Think about specific instances where you identified a critical issue and how you resolved it. This will demonstrate your ability to thrive in a fast-paced startup setting.
✨Understand Their Vision
Research the company’s mission and recent achievements, like their Series A funding and growth plans. Be ready to discuss how you can contribute to their goals, particularly in building robust security features. This shows that you’re aligned with their vision and ready to make an impact.
✨Be Ready for Collaboration
Since this role involves working closely with founders and customers, prepare to discuss your experience in collaborative environments. Share examples of how you’ve successfully worked in teams to deliver projects, highlighting your communication skills and ability to take ownership of tasks.