Mobile Engineer

TryHackMe Ltd; Greater London; Remote; GBP 100,000 - 125,000; Full time

Job summary

A dynamic technology education company in the UK is seeking a Senior/Lead Mobile Engineer to build their first mobile experience from scratch. The role is hands-on and will cover everything from architecture to app store submissions. This is an exciting opportunity to help shape mobile engagement for learners globally. Ideal candidates will have proven experience in shipping mobile applications using React Native and Expo, and a passion for enhancing user experiences.

Benefits

Personal Development Budget

100% Remote Work

Health Insurance

Company Retreat

401k / Pension

Free Lunch

Enhanced Maternity & Paternity Leave

Free THM Subscription for Family

Qualifications

• Proven experience shipping mobile apps end-to-end to both app stores.
• Strong expertise in React Native and Expo.
• Comfortable working with product and design teams.

Responsibilities

• Build and maintain the mobile application using React Native inside Expo.
• Own the full mobile lifecycle: prototyping, metadata setup, store submission, and release.
• Integrate with backend APIs and ensure smooth connectivity.

Skills

React Native

Expo

TypeScript

Mobile App Delivery

API Integration

User Experience Focus

Job description

TryHackMe is entering an exciting new chapter: bringing our platform to mobile for the first time. We’re building a lightweight companion app that helps learners stay engaged, practise skills on the go, and deepen their connection with the THM ecosystem. This role sits at the heart of that mission.

You’ll partner closely with engineers, design, product, and content to shape what “THM on mobile” actually means. There’s no legacy, no inherited constraints — you’ll be building the foundations, the architecture, and the app experience from scratch. It’s a rare opportunity to own a greenfield mobile product at a fast-growing company with millions of users, helping us test, learn, and define the long-term mobile direction for the business.

The Role

We’re looking for a Senior/Lead Mobile Engineer to build TryHackMe’s first mobile experience from the ground up. Your work will help us understand how mobile can strengthen learner engagement, support daily practice, and bring the platform closer to our global community.

You’ll report to the Head of Engineering and work closely with a small cross-functional squad. The role is hands-on and delivery-focused: shaping the architecture, building the first version of the app, and navigating the practical realities of app-store approvals, metadata, and release processes. Success means delivering a lightweight but genuinely useful companion app that helps us test the waters for a broader mobile strategy.

Your responsibilities will include:

• Building and maintaining the mobile application using React Native inside Expo, delivering a high-quality experience across iOS and Android.
• Owning the full mobile lifecycle: prototyping, metadata setup, store submission, quality gates, and release.
• Integrating with backend APIs and working with engineering teams to ensure smooth connectivity and authentication flows.
• Establishing sensible foundations for build and deployment pipelines (CI/CD) as the app evolves.
• Ensuring compliance with Google Play and App Store requirements, including test accounts and submission standards.
• Setting technical direction and mobile best practices that can scale beyond a single developer.
• Working closely with product and design to scope features, prioritise effectively, and deliver rapid iterations.

Skills & Requirements

Essential

• A builder’s mindset — someone who thrives in scrappy, zero-to-one environments and gets energy from turning ambiguity into real product.
• Proven experience shipping mobile apps end-to-end to both app stores, ideally as the primary or sole engineer on at least one project.
• Strong expertise in React Native and Expo, with the judgement to make pragmatic technical decisions that balance speed and long-term direction.
• Comfortable working closely with product, design, and founders to shape what the app should be — not just implementing requirements, but helping define them.
• Experience integrating with backend APIs and handling real-world concerns like authentication, offline behaviour, lifecycle events, and error resilience.
• Solid grounding in TypeScript, modern React patterns, and the nuances of mobile performance, rendering, and app structure.
• Ability to navigate the gritty parts of mobile delivery: metadata, screenshots, test accounts, Apple submission quirks, and Play Store requirements.
• Someone who cares deeply about quality and user experience, even when moving fast — and knows when “good enough for v1” is the right call.
• Passion for building products that help people learn, grow, and push themselves — enthusiasm that matches the energy and mission that built TryHackMe.

Desirable

• Experience creating or extending native modules (Swift/Kotlin).
• Exposure to CI/CD for mobile (EAS, fastlane, or custom pipelines).
• Familiarity with Detox or mobile E2E testing approaches.
• Experience working in a startup or early-stage product environment, where wearing multiple hats is normal.
• Interest in cyber security, education, or developer learning ecosystems.

Benefits & Perks

💸 Salary - We hire across 34+ countries. We determine salaries based on Geographic Location, Seniority, Interview Performance, and Market Rates using leading compensation benchmarking tools.

🚣 100% Remote - Work from the UK or EU with strong alignment to UK working hours. We prioritise effective collaboration, predictable communication, and shared availability across the team.

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

👕 Swag Pack - Start your TryHackMe journey with a sought-after branded swag bundle!

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

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

🧡 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.

🍕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.

🎟Free THM subscription for your circle - We know our platform can be transformative, and we want to extend that impact to your family and friends!

Interviewing Process

• Stage One - Intro Conversation (30 mins): A short call with our Talent team and Hiring Manager. We’ll explore your background, experience shipping mobile apps, and what appeals to you about building a v1 product at TryHackMe.
• Stage Two - Portfolio Review (45–60 mins): A live walkthrough of the mobile app you’re most proud of, with our Hiring Manager and Engagement PM. We’ll talk through what you built, the architectural and product decisions behind it, and your experience navigating real-world mobile engineering challenges.
• Stage Three - Paid Take-Home Task + Presentation: You'll complete a small, focused React Native/Expo task (2–3 hours max) that helps us understand how you structure and deliver mobile functionality - We pay £200 for this work - Once submitted, you’ll join us for a 30–45 minute presentation where you walk us through your thinking, decisions, and what you’d refine with more time.
• Stage Four - Founder Conversation (30–45 mins): A conversation with one of our founders about TryHackMe’s direction, our mission, and how mobile fits into the future of the platform. This is an opportunity for you to understand our long‑term vision and ask deeper product and strategy questions.
• Decision: We move quickly once we have enough signal. Our aim is a thoughtful, fast, and respectful process.