At a Glance
- Tasks: Own the stability and performance of the Duolingo Android app for millions of learners.
- Company: Join a leading language learning platform with a focus on innovation.
- Benefits: Comprehensive health benefits, generous paid time off, and professional development stipends.
- Other info: Dynamic team culture with opportunities for mentorship and career growth.
- Why this job: Make a real impact on app performance while working with cutting-edge technology.
- Qualifications: Strong Kotlin skills and experience with large-scale Android applications.
The predicted salary is between 59400 - 72600 £ per year.
As an Android engineer on our Application Stability and Performance team, you’ll own the stability and performance of the Duolingo Android Learning app for millions of learners. This team builds the tooling other engineers depend on to keep the app performant, like AI agent driven crash and memory analysis, coroutine system tracing, and Macrobenchmark suites that catch regressions before they ship.
You’ll also own the performance metrics that feed into our experiment analyses and help ensure hundreds of concurrent experiments surface any performance issues or regressions.
- Lead architectural initiatives to fix the slowest parts of the app, from startup to critical learning flows.
- Own and evolve our performance tooling with tracing, benchmarking, and automated regression detection.
- Serve as a bridge between Client Platform and Product feature teams, helping them understand and act on the performance data we provide.
- Foster a culture of engineering excellence around performance and mentor engineers of all experience levels.
Benefits:
- Medical, dental, and vision for employees as well as eligible partners and dependents.
- Mental health benefits such as therapy sessions and coaching to support you to be your best self.
- Fertility benefits to support your family planning journey.
- Fully paid parental and adoption leave.
- Fully paid subscription to Care.com and paid backup days for dependents and your fur family.
- 401(k) with generous match and immediate vesting.
- 20 days of paid time off, with two additional weeks off for winter break.
- First-time home buyer bonus (in Pittsburgh).
- Competitive salaries and equity.
- Yearly stipend for professional development.
- Transportation reimbursement for however you get to work.
- Lunch prepared daily by our in-house chefs.
- Annual international retreat for all full-time employees.
- Monthly events celebrating our team and their amazing work.
- On-site gym and massages.
- Game room for taking brain breaks.
Qualifications:
- Strong Kotlin skills and deep familiarity with coroutines, Jetpack Compose, and modern architecture patterns.
- Experience optimizing startup time, memory, and network usage for low-memory devices.
- Strong problem-solving skills and a passion for tackling difficult challenges.
- Experience identifying the root cause and resolving ANRs, memory leaks, dropped frames, and complex crashes.
- Worked on and shipped large scale Android applications.
- Experience with crash observability tooling like Sentry and Android Vitals.
- Expertise in Android tracing tooling like the AndroidX Tracing Library and Perfetto.
Senior Android Engineer (Client Platform, Application Stability and Performance) employer: Duolingo
Duolingo is an exceptional employer that fosters a dynamic and inclusive work culture in the heart of London. With a strong emphasis on employee growth, you will have access to unique opportunities for professional development while collaborating with diverse teams across the EMEA region. The company's commitment to translating global HR strategies into local practices ensures that your contributions will have a meaningful impact on the organisation and its people.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Android Engineer (Client Platform, Application Stability and Performance)
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Duolingo or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Duolingo.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Duolingo.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Duolingo that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Senior Android Engineer (Client Platform, Application Stability and Performance)
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Duolingo.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Duolingo and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at Duolingo
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Duolingo uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
