DevEx (DX) Engineer in Platform - Internal Tooling

Preply

Preply

Barcelona, Spain · London, UK · Barcelona, Spain · Spain · Ukraine · Kyiv city, Ukraine · London, UK · United Kingdom
Posted on Feb 20, 2025

We power people's progress.

At Preply, we’re all about creating life-changing learning experiences. We help people discover the magic of the perfect tutor, craft a personalized learning journey, and stay motivated to keep growing. Our approach is human-led, tech-enabled - and it’s creating real impact. So far, 90,000 tutors have delivered over 20 million lessons to learners in more than 175 countries. Every Preply lesson sparks change, fuels ambition, and drives progress that matters.

The role

Are you passionate about improving the developer experience?

Are you passionate about improving the tooling and process for developing, building & releasing software?

Are you excited to help our engineering teams use AI to improve & streamline their processes?

If you recognise yourself in most of the above questions, keep reading!

We’re looking for a Platform Engineer in our Developer Experience team that can help us in our mission. This is a role focused on Backend engineering, however it has crossover with many other aspects.

What you’ll be doing:

  • Unlock Developer Productivity: Identify and resolve pain points in code, build, test, and deployment workflows to make our engineers’ lives easier.
  • Support: Become the go-to expert for diagnosing and resolving development environment and tool issues.
  • Tool Evaluation: Test, evaluate, and investigate software development tools, and collaborate with vendors to elevate our development process.
  • Automation: Automate repetitive tasks and streamline development workflows.
  • Collaboration: Partner with other tribes and squads in Platform tribe to deliver the best tools and practices for development workflows.
  • Documentation and Training: Develop clear guidelines and conduct training sessions to help developers adopt new tools and processes.
  • Onboarding: Simplify the onboarding process with user-friendly, self-service development environments.
  • Technical Excellence: Help improve the Backend engineering experience and keep our tooling in tip top shape, including AWS running infrastructure and tools supporting our engineers.
  • Data-Driven Improvements: Make measurable improvements to our CI/CD pipelines, ensuring fast and reliable builds (currently around 90 deployments per day).
  • Infrastructure Optimization: Maintain and optimize our development and testing infrastructure to provide stable and efficient environments.

Must Have

  • Python development experience
  • Experience with CI/CD systems (Jenkins - 1st priority, GitHub Actions - 2nd)
  • Understanding of testing approaches (unit, integration, e2e)
  • Experience with test automation and stability improvements
  • Kubernetes experience
  • Experience with infrastructure as code (Terraform)
  • Experience with AWS
  • Experience with backend applications monitoring, profiling, debugging

Nice to Have

  • On-call experience
  • Understanding of cloud architecture patterns
  • Experience with GraphQL
  • Database optimization experience
  • Experience with localization tooling and pipelines (crowdin)
  • Experience with FinOps practices and cost optimizations
  • Understanding of web performance optimization

Key Focus Areas

  1. Test Infrastructure
    • Improving test stability
    • Optimizing test execution speed
    • Managing test infrastructure
    • Implementing effective test isolation
  2. CI/CD Systems
    • Pipeline optimization
    • Build caching strategies
    • Ephemeral environments automations
  3. Infrastructure & Tooling
    • Kubernetes cluster management
    • AWS infrastructure optimization
    • Developer tooling improvements
    • Monitoring and debugging tools

Our Principles

  • Care to change the world - We are passionate about our work and care deeply about its impact to be life changing.
  • We do it for learners - For both Preply and tutors, learners are why we do what we do. Every day we focus on empowering tutors to deliver an exceptional learning experience.
  • Keep perfecting - To create an outstanding customer experience, we focus on simplicity, smoothness, and enjoyment, continually perfecting it as every detail matters.
  • Now is the time - In a fast-paced world, it matters how quickly we act. Now is the time to make great things happen.
  • Disciplined execution - What makes us disciplined is the excellence in our execution. We set clear goals, focus on what matters, and utilize our resources efficiently.
  • Dive deep - We leverage business acumen and curiosity to investigate disparities between numbers and stories, unlocking meaningful insights to guide our decisions.
  • Growth mindset - We proactively seek growth opportunities and believe today's best performance becomes tomorrow's starting point. We humbly embrace feedback and learn from setbacks.
  • Raise the bar - We raise our performance standards continuously, alongside each new hire and promotion. We build diverse and high-performing teams that can make a real difference.
  • Challenge, disagree and commit - We value open and candid communication, even when we don’t fully agree. We speak our minds, challenge when necessary, and fully commit to decisions once made.
  • One Preply - We prioritize collaboration, inclusion, and the success of our team over personal ambitions. Together, we support and celebrate each other's progress.

Diversity, Equity, and Inclusion

Preply is committed to creating a diverse and inclusive environment where people from all backgrounds can thrive. Different opinions and viewpoints are key ingredients in our success as a multicultural Ed-Tech company.

Preply will consider all applications for employment without regard to race, color, religion, gender identity or expression, sexual orientation, national origin, disability, age or veteran status. Together, we are The World Class.