At a Glance
- Tasks: Own and evolve web assets, drive product decisions, and build engaging user experiences.
- Company: Join Praktika, a leading AI language learning app with over 2 million users.
- Benefits: Equity options, 26 days holiday, health benefits, and an annual educational budget.
- Other info: Dynamic team culture with excellent growth opportunities and yearly off-sites.
- Why this job: Be part of a mission to revolutionise language learning with cutting-edge AI technology.
- Qualifications: Experience in Typescript, React, Node.js, and a strong UI/UX sense.
The predicted salary is between 60000 - 80000 € per year.
About Us
At Praktika, we are building the best AI tutors to teach millions of students new languages. Since we launched our mobile apps in 2023, we have gained over 2 million MAU, become one of the world's top-4 learning apps, and are aiming to lead the AI revolution in education and become the solution of choice for contemporary language learners. We've secured our $30 million Series A funding and are scaling the team to run faster!
About The Role
We are seeking a Senior Full-stack Engineer for our web team to own and evolve all web-facing assets at Praktika — from onboarding flows and landing pages to internal tools and web-based product features. This is a full-cycle product engineering role: you'll contribute to the product vision, design experiments, ship features, and measure impact. You'll work closely with Product, Marketing, and Growth teams to drive conversion, retention, and user experience across all web touchpoints.
What You'll Do At Praktika:
- Own the entire web stack — main website, onboarding funnels, customer portals, web app, and internal tools.
- Lead architecture, development, experiments and operations for all web applications.
- Drive product decisions: dive into the product vision, run A/B tests, analyze results, and iterate fast.
- Build adaptive, animated, mobile-first experiences that convert and delight users.
- Integrate with backend services (using Swagger Docs), authentication providers (Google/Apple SSO), and payment gateways (Stripe, PayPal, Revenuecat).
- Set up and optimize analytics, tracking, and conversion funnels in collaboration with Growth and Marketing.
- Ship production-ready code end-to-end — from idea to deployment to monitoring.
What We Are Looking For From You:
- Product mindset first: you think in user problems and business outcomes, not just code.
- Extensive experience with Typescript, React (hooks, context, state management) and Node.js.
- Proficiency with modern full-stack tooling: TypeScript, Next.js or similar, CSS-in-JS or Tailwind.
- Hands‑on experience integrating auth providers (Firebase, Auth0), payment systems (Stripe, Revenuecat, PayPal), feature flag platforms (LaunchDarkly, Flagsmith) and analytics/marketing tools (Amplitude, Posthog).
- Strong sense of UI/UX — you care about animations, micro-interactions, and conversion details.
- Comfortable working with RESTful APIs and collaborating with backend teams.
- Data‑driven approach: experience with A/B testing, funnel optimization, and analytics tools.
- Bonus: Portfolio showcasing high-quality web projects and successful conversion experiments.
Why Should You Join Praktika:
- Equity that grows with your impact: Equity growth via stock options.
- 26 days of holidays plus bank holidays (34 days per year).
- Yearly off‑sites: Last year was Istanbul.
- Health and wellness benefits via Safetywing.
- Access to an AI toolkit, including Claude, Cursor, Codex, and other productivity tools.
- Annual educational budget of up to $1,000.
Apply now to be part of a team that is redefining language learning for millions of users worldwide. At Praktika.ai we are on a mission to deliver efficient and engaging learning experiences for billions of people worldwide by bridging the gap between learning apps and human tutors. We have done this by creating a fully automated language tutorship experience powered by generative AI Avatars.
Senior Full-Stack Engineer in London employer: Praktika.ai
At Praktika, we pride ourselves on being an innovative employer that empowers our team members to make a significant impact in the world of language learning. With a strong focus on employee growth, we offer generous benefits such as equity options, extensive holiday allowances, and an annual educational budget, all within a collaborative and dynamic work culture. Join us in our mission to revolutionise education through AI, while enjoying unique perks like yearly off-sites and access to cutting-edge tools.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Full-Stack Engineer in London
✨Tip Number 1
Network like a pro! Reach out to folks in your industry on LinkedIn or at meetups. We all know that sometimes it’s not just what you know, but who you know that can get you in the door.
✨Tip Number 2
Show off your skills! Create a portfolio that highlights your best projects and experiments. We want to see your coding prowess and how you’ve tackled real-world problems, especially in web development.
✨Tip Number 3
Prepare for those interviews! Research Praktika and come armed with questions about their product vision and user experience strategies. We love candidates who are genuinely interested in our mission.
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, we’re always on the lookout for passionate individuals ready to join our journey in revolutionising language learning.
We think you need these skills to ace Senior Full-Stack Engineer in London
Some tips for your application 🫡
Show Your Passion:When writing your application, let your enthusiasm for language learning and AI shine through. We want to see how your passion aligns with our mission at Praktika!
Tailor Your Experience:Make sure to highlight your experience with full-stack development, especially with Typescript, React, and Node.js. We’re looking for specific examples that demonstrate your skills and how they can benefit our web team.
Be Data-Driven:Since we value a data-driven approach, include any relevant metrics or results from your past projects. Show us how you’ve used analytics to drive product decisions and improve user experiences.
Apply Through Our Website:Don’t forget to apply through our website! It’s the best way for us to receive your application and ensures you’re considered for this exciting opportunity at Praktika.
How to prepare for a job interview at Praktika.ai
✨Know Your Tech Stack
Make sure you’re well-versed in Typescript, React, and Node.js. Be ready to discuss your experience with these technologies and how you've used them in past projects. Practika is looking for someone who can hit the ground running, so showcasing your technical skills will definitely give you an edge.
✨Showcase Your Product Mindset
During the interview, emphasise your understanding of user problems and business outcomes. Share examples of how you've contributed to product vision and driven conversion through your work. This role is all about owning the web stack, so demonstrating a strong product mindset will resonate well with the team.
✨Prepare for A/B Testing Discussions
Since you'll be diving into product decisions and running experiments, be prepared to talk about your experience with A/B testing and funnel optimisation. Bring specific examples of tests you've run, what you learned from them, and how they impacted user experience or conversion rates.
✨Demonstrate Your UI/UX Sensibility
Practika values a strong sense of UI/UX, so be ready to discuss your approach to creating engaging, mobile-first experiences. If you have a portfolio, bring it along to showcase your best work, especially projects that highlight animations and micro-interactions that enhance user engagement.
