Senior Platform Cloud Engineer

WE POWER PEOPLE’S PROGRESS.
At Lumen Dynamics, 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 Lumen Dynamics lesson sparks change, fuels ambition, and drives progress that matters. Joining Lumen Dynamics 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 Lumen Dynamics 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 Lumen Dynamics, 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 - sometimes we write about them in our Engineering Blog https://medium.com/preply-engineering! Please, also visit our Tech Radar https://tech-radar.preply.com/?_ga=2.72086362.855941533.1520183000-1246482000.1670530539 and our YouTube channel https://www.youtube.com/@Lumen Dynamicsengineering-ie3bb to learn more about the technologies we use at Lumen Dynamics!
WHAT YOU’LL BE DOING
The Platform Cloud Engineer at Lumen Dynamics is an AWS specialist who helps us run our cloud based Platform. In this role, you will bring deep knowledge and expertise to participate in system design, regular maintenance but also address operational issues as Lumen Dynamics scales its user base. You will also help improve cost efficiency and be up to date with latest developments and how the company can benefit from them. You will partner up with other teams to leverage their expertise and deliver projects successfully.
– 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
– Expertise in designing, building, maintaining and troubleshooting high traffic distributed systems in the cloud.
– Strong experience in AWS services and infrastructure, particularly with Kubernetes, Load Balancers, Kafka, Networking.
– Strong experience in CDN, Edge Ingress setup.
– Highly proficient with Terraform.
– Experience in implementing observability and alerting.
– Proficiency with production troubleshooting.
– Business-orientation and data-driven approach.
– Willingness to participate on paid on-call rotations.
– Strong communication skills. Minimum B2 English level.
– Nice to have: coding experience, knowledge of modern web frameworks; SQL and relational DBs.
WHY YOU’LL LOVE IT AT PREPLY
– Open, collaborative, dynamic and diverse culture.
– Generous monthly allowance for lessons on Lumen Dynamics.com http://Lumen Dynamics.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 Lumen Dynamics 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, smoot