Senior Backend Engineer (Go)

You’ll be solving complex challenges and maintaining our own infrastructure with 60PB+ monthly data traffic. Here are its scale and maturity in numbers:

• 6PB+ Ceph storage
• 60PB+ monthly data traffic through our systems
• 300k+ service requests/sec processed
• 500k+ Kafka messages/sec streamed

They're building the next generation of web scraping platform - new high-scale product endpoints, designed Go-first. We're looking for a strong backend engineer who wants to grow into Go, treats AI tools as a core part of how they build, and likes owning real problems at scale

### In this role, you’ll:

• Design and build new backend services and product endpoints, Go-first
• Work across our current Node.js/TypeScript core while new components grow in Go
• Write clear, tested, documented code that delivers real business value
• Partner with engineers to shape architecture and review each other's work

• 5+ years of backend development experience (any language).
• Some hands-on Go, or a genuine drive to build in it.
• Strong grasp of distributed systems and building for scale.
• You use AI coding tools (Claude, Copilot, Cursor, Codex or similar) as part of your daily workflow - and you're curious about where AI fits into production systems, not just your editor.
• Proactive, ownership-driven mindset and solid English and Lithuanian language knowledge.

Nice to have

• Familiarity with React/JS to understand how backend logic is visualized.
• Skilled in using Docker and Kubernetes for deployment and orchestration.
• Experience leading R&D initiatives and/or introducing new technologies/AI tools.

• Growth & Learning: 40+ internal learning options, external conferences, mentorship, and year-round knowledge-sharing.
• Health & Well-being: Private health insurance, psychotherapy, on-site well-being consultants, 24/7 gym access, and a wellness app.
• Celebration & Community: Team events, an overseas workation, quarterly team-building budgets, and plenty of ways to mark milestones together.
• Bonus vacation days, paid life-moment days off, barista coffee, and all the tools you need.
• Vast internal & external learning resources
• Guilds, communities & 500+ professionals by your side
• Tesonet network & knowledge sharing
• Yearly workation
• Year-round internal & Tesonet community events
• Team building budget
• Cyber City office perks
• Hybrid work (3 office days/ 2 WFH) & WFA options
• Latest tools, gadgets & tech stack
• Extra days off
• Special Tesonet product deals
• Private health insurance
• 24/7 gym
• Physical well-being specialists
• Psychologist/psychotherapist sessions
• Inclusive family-related time-off policy