123pracovat

• Prague 9, CZ  

• Software engineer

• Full time job

• Education is not essential

• 140 000 - 200 000 CZK/month

Bookbot is a recommerce platform that operates in 9 countries, ships books to 40 countries and has already sold over 10 million books. Every day we sell around 25,000 books and receive a little bit more. We are the 16th fastest growing tech startup in the CEE region.

Who we’re looking for:

• You are an experienced platform engineer with expertise in AWS & Kubernetes.

• You can quickly get up to speed with our infrastructure and help relieve our CTO David, by taking over a range of responsibilities.

• You’re not afraid to propose new solutions and can independently choose the most efficient technological strategies for your team.

• You are also familiar with our application stack:

• Backend: Typescript (AdonisJS on older things, NestJS on the new ones), MySQL, Redis, Manticore, Kafka)

• Frontend: Next.js, SWR, MaterialUI, BaseUI

• You have good knowledge of the Czech and English languages.

What is your great advantage - you have some experience in leading a small DevOps team, but you are still very hands-on (about 80% of your time). Or you want to take a step in your career towards leadership.

Your responsibilities (on top of being a platform engineer):

• Have a clear overview of what’s happening in the teams and the broader context.

• Ensure the delivery of results that align with requirements and priorities.

• Regularly report to the CTO and sync with the Product Managers.

• Represent the entire team and be the main contact for the Platform team.

• Organize team demos/presentations.

• Assist Product with ticketing and estimations.

• Help manage sprints to ensure everything is well planned and completed on time.

• Moderate daily stand-ups.

Current and upcoming Platform team projects:

• Kafka Optimization & Reliability

• Designing and managing Kafka consumers with auto-distribution across a worker pool

• Implementing circuit breakers and consumer-based topic control

• Leading zero-downtime migration to self-managed Kafka using Strimzi and MirrorMaker

• CDC with Debezium

• Streaming data from MySQL to Snowflake (including audit logs)

• Implementing transactional outbox patterns

• Secrets Management

• Replacing the current secrets pipeline (AWS Secrets Terraform K8s Secret) with a more flexible solution like External Secrets Operator

• File Handling & S3 Uploads

• Refactoring image upload pipeline to use UUIDs instead of auto-increment IDs

• Enabling direct uploads to S3 using presigned URLs

• Scalability & Infrastructure

• Revamping Kubernetes resource limits/requests

• Implementing autoscaling using Karpenter and KEDA

• Leveraging spot instances for cost optimization

• Testing & CI/CD Enhancements

• Integrating Cypress tests into the CI pipeline

• Finalizing per-PR deployment isolation:

• Separate instances of MailDev

• Isolated Manticore index clusters

• Kafka topic cleanup automation

• Implementing simple A/B testing across backend and frontend

• Setting up alerts and dashboards for everything - we need to know about infrastructure issues before they happen, or at least before customer support does.

• Defining blueprints so that regular developers can easily set up monitoring for their features.

DevOps Tech Stack:

• Kubernetes, AWS.

• Terraform, ArgoCD, GitHub Actions, Prometheus, Loki, Manticore Search, Redis, Kafka, Keda, Aurora, MySQL.

How we work:

• The Platform team currently consists of about 3.5 people, including our CTO, David Gazdoš. There are 18 developers overall.

• We have daily stand-ups, weekly Backend Tech Meetings and Frontend Tech Meetings, and bi-weekly deep dives into new features.

• Our office is at Kolbenova metro station, and we work onsite with flexible working hours.

What we offer:

• Our budget is 140,000 - 200,000 CZK/month

• Work with awesome people like the internal systems guru Simon, and CTO David. The team is full of good vibes, and we sometimes grab a beer or go rock climbing together.

• Listen to a podcast with David & Simon to get an even better understanding of how our development team works and what we’re currently tackling.

• We build everything in-house, so there’s a wide variety of problems to solve-you won’t get bored, and there’s always something to work on and innovate.

• You’ll see the results of your work immediately - when we rework or optimize a process, it typically has visible positive effects, not just on the website but also in the warehouse, shipping, customer support, or intake. If something goes wrong, you'll hear about it within minutes!

• An amazing opportunity to have a significant impact on the future of Knihobot and to grow with us exponentially.

• MultiSport card, employee discounts on buying and selling books, and discounts with partners.

• Professional development budget.

• One extra week of vacation after one year of cooperation, two extra weeks after two years.

• Option to gain ESOP (employee stock ownership plan) and have a financial stake in the company’s success.

• An informal environment and a pragmatic approach to getting things done.

Kateřina Nushartová

+420775993552