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, wellness 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.
Lead/ Senior Full-Stack Engineer in London employer: Praktika.ai
At Praktika, we pride ourselves on being an innovative employer that empowers our team to shape the future of language learning through cutting-edge AI technology. With a strong focus on employee growth, we offer generous benefits including equity options, extensive holiday allowances, and a supportive work culture that encourages collaboration and creativity. Join us in our vibrant location, where you'll have access to an array of resources and tools to enhance your skills while making a meaningful impact on millions of learners worldwide.
StudySmarter Expert Advice🤫
We think this is how you could land Lead/ 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. A personal connection can often get you a foot in the door faster than any application.
✨Tip Number 2
Show off your skills! Create a portfolio that highlights your best projects, especially those that align with what Praktika is doing. This will give you an edge and show you're serious about the role.
✨Tip Number 3
Prepare for interviews by practising common questions and scenarios related to full-stack development. We want to see how you think and solve problems, so be ready to showcase your product mindset!
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets seen. Plus, it shows you’re genuinely interested in being part of the Praktika team.
We think you need these skills to ace Lead/ 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 excited you are about the role and how you can contribute to our mission at Praktika.
Tailor Your Experience:Make sure to highlight your relevant experience with full-stack development, especially with Typescript, React, and Node.js. We’re looking for specific examples of how you've tackled user problems and driven business outcomes in your previous roles.
Be Data-Driven:Since we value a data-driven approach, include any experiences you have with A/B testing, funnel optimisation, or analytics tools. Show us how you've used data to inform your decisions and improve user experiences.
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 from our team!
How to prepare for a job interview at Praktika.ai
✨Know Your Tech Stack
Make sure you’re well-versed in the technologies mentioned in the job description, especially Typescript, React, and Node.js. Brush up on your knowledge of modern full-stack tooling like Next.js and CSS-in-JS or Tailwind, as these will likely come up during technical discussions.
✨Showcase Your Product Mindset
During the interview, emphasise your ability to think beyond just coding. Share examples of how you've approached user problems and business outcomes in previous projects. This will demonstrate that you understand the bigger picture and can contribute to product vision.
✨Prepare for A/B Testing Questions
Since the role involves running experiments and analysing results, be ready to discuss your experience with A/B testing and funnel optimisation. Bring specific examples of tests you've conducted, what you learned, and how it impacted user experience or conversion rates.
✨Demonstrate Your UI/UX Sensibility
Given the emphasis on creating delightful user experiences, be prepared to talk about your approach to UI/UX design. Discuss any projects where you focused on animations, micro-interactions, or conversion details, and how these elements improved user engagement.
