Backend Engineer | Senior | Transition To Go | Saily

at Nord Security
📍 Warsaw, Poland
PLN 237,600-400,800 per year
SENIOR
✅ Hybrid

SCRAPED

Used Tools & Technologies

Not specified

Required Skills & Competences ?

Go @ 4 Kafka @ 4 Kubernetes @ 1 MySQL @ 4 Redis @ 4 Ruby @ 4 Python @ 4 SQL @ 4 R @ 4 NoSQL @ 4 AWS @ 4 Communication @ 4 PHP @ 4 PostgreSQL @ 4 API @ 4 Experimentation @ 4 Cassandra @ 4

Details

At Saily, we’re removing the hassle from getting secure data plans while traveling.

No roaming charges, no plastic SIM cards. Just fast, secure mobile data in 150+ countries. Join the team behind Lonely Planet’s #1 eSIM—built for explorers, powered by NordVPN.

Your impact? Helping people stay securely connected, wherever they go.

Responsibilities

  • Enhance the Saily product by developing and maintaining new features.
  • Create features to support layers of multi-dimensional personalization, A/B experimentation, and analytics.
  • Develop and maintain a high-quality codebase; constantly seek to improve code and performance.
  • Mentor colleagues on development best practices and provide technical guidance.
  • Influence the overall vision and long-range goals of your team.
  • Perform R&D operations when required.
  • Work as part of a cross-functional team and help ensure smooth communication between team members.
  • Collaborate with engineering, product, and design professionals from other teams.

Please keep in mind that this position requires office attendance 3 times a week!

Requirements

  • Over 4 years of experience in backend development.
  • Preferably a background in Python, PHP, or Ruby.
  • Strong understanding of system design and patterns — you know what patterns to use, when, and why.
  • Experience with SQL (MySQL, PostgreSQL) and NoSQL (Cassandra, Redis) solutions.
  • Previous experience with Kafka.
  • Previous experience with Kubernetes and microservice architecture is a plus.
  • Passionate about building APIs that are easy to use and simple to understand.
  • A collaborative mindset; you enjoy discussing, rethinking, and redesigning ideas to create shared success.

Tools & Technologies

  • Go
  • MySQL
  • Kafka
  • Kubernetes
  • AWS
  • Redis

Salary

  • Gross salary: 19,800–33,400 PLN per month (approximately 237,600–400,800 PLN per year).

Additional Information

  • Commitment: Full Time
  • Team: Backend - Saily
  • Location: Warsaw, Poland (office attendance required ~3x/week)
  • Workplace type: Onsite / Hybrid (see office attendance requirement above)