Senior Full-Stack Engineer – Certifications

Full-time, remote.

Join TryHackMe as a Senior Full-Stack Engineer on our Certifications Squad! 🥷

TryHackMe is the fastest growing online cybersecurity training platform. Our mission is to make learning and teaching cybersecurity easier through gamified security exercises and challenges. In just a handful of years, we’ve grown into a highly profitable business trusted by over 9 million learners and 1,000+ enterprise organisations globally, including Google, KPMG and the US Military and our growth isn’t slowing down.

Most cyber security certifications test what you've memorised. Ours test what you can do. SAL1 and SAL2 put candidates inside a live SOC simulator, PT1 is a hands-on penetration test with a professional report, and AI1 covers AI security. Now we're building the next level: certificates that validate the path a learner chose on TryHackMe and prove their quality to prospective and current employers. You'll join a high-autonomy, high-velocity squad where your decisions directly impact real learners from day one.

Location / Time Zone: 100% Remote (UK / EU based with strong overlap with UK business hours required).

The Stack & Engineering Culture

Core Stack: TypeScript, React, Next.js, Node.js, Express, MongoDB High Velocity: We operate as a high-trust, high-autonomy team shipping 250+ PRs per week Pragmatic AI Workflow: We actively leverage modern AI development tools (Cursor, Claude Code, Codex) to accelerate execution

The Certification Squad & What You'll Own

You'll be embedded in a small, cross-functional squad (engineers, product manager, designer) with end-to-end ownership of how TryHackMe certifications are built, taken, and trusted. That means:

Next-level certificates: Design and build credentials that validate a learner's chosen path on TryHackMe and show employers, current and prospective, the quality behind them. Exam experience: Own the product around the exam, from how learners prepare and book to how they take it and receive and share their result. Cutting-edge exam content: Work directly with our in-house Content Engineering team on the content and scenarios that make our exams practical, realistic and hard to game, and on the environments they run in. Employer trust: Build the verification and sharing tools that let employers confirm what a certificate means and what the holder can do. Cross-functional delivery: Work closely with Product, Marketing and Content Engineering to take certifications from idea to launch and keep improving them.

Day-to-Day Responsibilities

End-to-End Ownership: Take ambiguous, loosely defined product problems from initial concept through design, implementation and production deployment.
Architecture & Craft: Design scalable, reliable and secure RESTful APIs and modern frontend interfaces, keeping long-term maintainability and system performance in mind. Exams need to be dependable and fair, so reliability matters.
Cross-Functional Partnering: Work directly alongside product managers, designers and Content Engineers to shape how problems get solved, not just pick up pre-written tickets.
Engineering Leadership: Elevate squad quality through thoughtful code reviews, system design discussions, and mentoring fellow engineers.
Product Curiosity: Validate what works using data, user feedback, and experimentation rather than relying on opinions.

What You'll Bring

Core Technical Mastery: Strong commercial full-stack experience building production SaaS applications with advanced TypeScript, Node.js, React and MongoDB/SQL fundamentals.

Product Engineer Mindset: You care deeply about user impact and business outcomes, not just backend plumbing. You prefer shipping real value quickly over endless corporate red tape.
High Ownership & Autonomy: Comfort working in fast-paced environments where you take full accountability for your features, from database schemas to UI polish.
AI-Assisted Efficiency: Experience using modern AI dev tools (Cursor, Claude) to move faster, combined with the technical judgment to critically evaluate and test generated code.
Clear Communication: Ability to explain complex technical trade-offs clearly to both technical and non-technical teammates.
Nice to have: Experience with Sanity (or a similar headless CMS).
Bonus Points: A genuine interest in cybersecurity or online education, an active TryHackMe profile you're proud of, or a TryHackMe certification you've earned yourself.

Why TryHackMe?

High Impact & High Autonomy: Work in a small team where your code directly reaches millions of learners and global enterprises, not lost inside a 500-person engineering department.
Elite Sports Team Mindset: We foster a candid, direct feedback culture built on rapid execution, high trust, and extreme ownership.
Profitable & Fast-Growing: Enjoy the velocity of an early-stage scale-up backed by the stability of a highly profitable, self-sustaining business.

Benefits & Perks

🚣 100% Remote - In a fully digital world, work from anywhere you want!

🕒 Flexi Time - Choose your own hours as long as you have at least 4 hours of overlap with the UK timezone (from 8am - 6pm)

💻 Tools - a dedicated work laptop + any accessories you need to do your best work.

👕 Swag Pack - start your TryHackMe journey with a branded swag bundle!

💪 Personal Development - £2,500 training budget to acquire certifications, and more.

⛱️ Company Retreat - an annual company retreat, fully paid for by us!

🍕Lunch on us - whether you're a pizza-lover, salad obsessed or a big sushi fan, TryHackMe will cover the cost of your lunch order during our recurring company virtual lunches.

🧡 Health Insurance - if you're in a country that doesn't have public health care.

🍼 Enhanced Maternity & Paternity- an enhanced package on top of statutory requirements.

💸 401k / Pension - TryHackMe makes it easy to save money for your retirement.

Our Hiring Process

Stage 1: Introductory Chat with Talent Partner (~15 mins)

Stage 2: Technical & Experience Interview with the Head of Engineering

Stage 3: Take-Home AI-Assisted Technical Assessment + Follow up with the Engineers

Stage 4: Founders Interview (Culture & Operating Alignment) with Co-Founder

Senior Full-Stack Engineer – Certifications