Senior Java Software Engineer

Job summary
Permanent contract
Tallinn
A few days at home
Salary: Not specified
Skills & expertise
Leadership
Mentoring
Collaboration and teamwork
Problem-solving skills
Java
+4

Onoff
Onoff

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The position

Job description

🔥 Senior Java Engineers Wanted: Build the Future of Communication with Onoff! 🔥

Onoff is looking for seasoned Senior Java Engineers who are passionate about clean architecture, scalable systems, and mentoring others while still staying hands-on with code. Sounds fascinating? Keep reading..

🚀 Why Join Onoff?

At Onoff, we’re not just writing code, we’re reshaping the telecom industry with a product-first mindset and world-class engineering. This is your chance to lead innovation in a profitable SaaS company that’s growing fast.

💡 Lead & Influence – Make architectural decisions and shape technical direction.

📈 High Impact Work – Build core systems, scale next-gen telecom SaaS products, and bring bold ideas to life.

🌎 Flexibility – Work the way that works best for you.

💰 Compensation – We invest in top talent.

🏖 Extra Time Off – Rest, reset, and recharge.

🩺 Private Health Plan – Because your well-being matters.

✈️ Travel Budget – For work and inspiration beyond the screen.

📚 Continuous Learning – Stay sharp, stay curious.

🎉 Epic Team Culture – Ambitious work, good people, and plenty of celebration.

🔧 What You’ll Be Leading

  • Architecting and building scalable, high-availability back-end services for our global communication platform.
  • Designing APIs and infrastructure with performance and security in mind.
  • Mentoring engineers, driving code quality, and championing best practices.
  • Collaborating with product, design, and cross-functional teams to deliver end-to-end solutions.
  • Taking ownership of key initiatives from idea to deployment—and beyond.

🛠 What You Bring

  • Deep Java expertise – You write beautiful, efficient, production-ready code.
  • Experience with Docker, MySQL, AWS – You can build and scale infrastructure like a pro.
  • Leadership mindset – You enjoy guiding others and driving technical conversations.
  • Problem-solving superpowers – You break down complexity and find elegant solutions.
  • Product passion – You care about the what and why as much as the how.
  • Startup energy – You thrive in fast-paced, evolving environments.

👉 Ready to step up and lead? Send us your CV 📩 and let’s build something extraordinary together, with you at the helm.

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