Senior Site Reliability Engineer Location: London, United Kingdom

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.

As a member of the Platform tribe, the Site Reliability Engineer (SRE) at Preply combines software development, infrastructure operations and business skills to run a large-scale, fault-tolerant, global language education platform. The SRE ensures that Preply systems have high reliability, top-in-the-industry uptime and a fast rate of product innovations. Additionally, SREs keep an ever-watchful eye on the capacity and performance of our system. You will work on core parts of our platform and help us to meet the challenges of growing our organization in terms of both traffic and the number of developers. The SRE team unites infrastructure, engineering and business to ensure great synergy that helps Preply succeed.

Our main focuses are:

• Top in the industry uptime record and latency.
• Blazingly fast Lead Time for our product engineers.
• Running infrastructure in a cost effective way.

We work in small teams, thus you will be able to influence system design and contribute a lot to the company's growth. We’re really serious about it: you’ll be able to actually measure how your work impacts business and present it to the whole company. We promote self-direction to work on meaningful projects, while we also strive to create an environment that provides the support and mentorship needed to learn and grow. We release our product 70-80 times per day by leveraging modern technologies like Kubernetes, Docker and top-notch CI/CD processes. We have diverse technical challenges that will allow you to develop your skills across the stack.

What you’ll be doing:

• Own the availability and performance of mission-critical services and build automation to prevent problems recurrence.
• Improve the lead time of Engineers at Preply.
• Improve the system’s scalability, observability, and alerting.
• Practice sustainable incident response and blameless postmortems.
• Collaborate with product teams to help them tackle technical issues and design new systems.
• Strengthen credibility with the quality of the team's technical execution.
• Follow the best FinOps practices.
• Manage on-call rotation across the team.

What you need to succeed:

• Expertise in problem solving and analyzing high loaded systems.
• Proficiency with production troubleshooting.
• Business-orientation and data-driven approach.
• Strong experience with k8s, Docker, Helm or similar technologies.
• Experience with AWS or any other cloud provider.
• Understanding of Networking: network topologies and common network protocols and services.
• Experience coding in one or more programming languages.
• Any knowledge of modern web frameworks is a plus, as well as SQL and relational DBs.
• Willingness to participate on paid on-call rotations.
• Strong communication skills.
• Minimum B2 English level.

Why you’ll love it at Preply:

• Open, collaborative, dynamic and diverse culture.
• Generous monthly allowance for lessons on Preply.com.
• Learning & Development budget, including time off for your self-development.
• Competitive financial package with equity, leave allowance.
• Opportunity to shape the lives of learners and tutors from over 175 countries through language learning and teaching.

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.