Senior Software Engineer (For independent contractors)

Booking.com is seeking a hands-on Senior Software Engineer for the Pay-in Flexibility team. This team resides within the Fintech business unit and focuses on the development, operation, and scaling of payment solutions that offer travelers diverse payment methods and flexible timing, such as "Buy Now, Pay Later" and payment capabilities such as "Pay In Your Own Currency".

A Senior Software Engineer on the team will design, implement, and operate scalable, highly available payment services that let travelers choose when and in which currency to pay, while safeguarding revenue and compliance.

A suitable candidate leads end‑to‑end delivery: shaping engineering requirements, making architectural trade‑offs, driving experiments, and improving reliability and observability.

This role requires technical autonomy and the ability to unblock complex architectural bottlenecks without external guidance.

A Senior Software Engineer independently resolves high-priority production issues and leads code reviews and technical design sessions to elevate the engineering standards of junior and mid-level developers.

Technical leadership is a primary soft skill requirement, as the role demands the ability to shape engineering requirements.

Successful candidates demonstrate high levels of technical autonomy, navigate complex bottlenecks and resolve high-priority production issues independently.

Beyond individual contribution, the position requires a collaborative mindset and mentorship capabilities, particularly in leading code reviews and design sessions.

The role necessitates advanced analytical thinking to effectively balance architectural trade-offs while prioritizing system reliability and long-term observability.

The tech stack includes:

• JVM microservices (Java/Kotlin, Dropwizard/Spring)

• Kafka

• MySQL

• GitLab CI/CD

• containerized workloads with rich monitoring/alerting (Grafana, Graphite)

• data/ML pipelines

  
  

• Services are deployed via Harness/Kuhub on on-premise infrastructure.