Senior II Platform Software Engineer in London

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 personalised learning journey, and stay motivated to keep growing. Our approach is human-led, tech-enabled - and it’s creating real impact. We’ve just reached unicorn status with a $150M Series D, accelerating our vision to transform education through human-led, AI-enhanced learning. Today, 100,000+ tutors teach 90+ languages to learners in 180 countries - and we’re only getting started. As a category-defining company, we’re shaping what the future of learning looks like at global scale.

Every Preply lesson sparks change, fuels ambition, and drives progress that matters. Joining Preply means helping define the future of education at global scale, and building something that truly matters for millions of people, every day.

Meet the team! 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.
• Invest in Platform’s scalability.
• Develop core services & tooling powering our Platform.
• 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 in the company's growth. 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’ve reached 90%+ adoption of AI coding tools across engineering, and we’re now moving towards more autonomous, AI-Augmented development at scale. At Preply, engineers have direct access to the best tools available, with the freedom to use them fully and experiment as they build.

We have diverse technical challenges that will allow you to develop your skills across the stack.

What you’ll be doing:

• The Software Platform Engineer at Preply combines software engineering practices with cloud infrastructure, distributed systems patterns, storage systems and observability to deliver on a wide range of projects - ranging from tooling to core Platform services which serve production traffic.
• Own the availability and performance of mission-critical services and build automation to prevent problems recurrence.
• Improve the system’s scalability, observability, and alerting.
• Build tooling to improve our platform and accelerate the overall software development.
• 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.
• Participate in on-call rotation across the team.

What you need to succeed:

• Extensive experience (~8 years) in designing, building, maintaining and troubleshooting high traffic distributed systems.
• Proficient software engineering skills. Strong coding experience in one or more programming languages (preferably Python).
• Experience with at least one major public cloud, its services and infrastructure (preferably AWS).
• Experience in implementing observability and alerting.
• Willingness to participate on paid on-call rotations.
• Business-orientation and data-driven approach.
• Nice to have: knowledge of modern web frameworks; SQL and relational DBs.
• 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, and leave allowance.
• Opportunity to shape the lives of learners and tutors from over 175 countries through language learning and teaching.

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.com is committed to creating an inclusive environment where people of diverse backgrounds can thrive. We believe that the presence of different opinions and viewpoints is a key ingredient for our success as a multicultural Ed-Tech company. That means that 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.