Senior Product Engineer (AI-native)

About the role

At Saily we’re removing the hassle of staying connected while traveling, offering fast, secure mobile data in over 200 destinations. We are seeking a senior product engineer to own end‑to‑end feature development in an AI‑native environment.

Key responsibilities

• Own problems end‑to‑end—from idea to production.
• Deliver features without fully defined specifications.
• Work directly with product, design, data, and engineering teams.
• Operate in small, autonomous teams and use AI agents for coding, testing and iteration.
• Deliver twice the output of a non‑AI senior engineer.
• Improve internal AI agent network and development workflows.
• Move across the stack as needed, focusing on user and business outcomes.

Required profile

• Proven experience designing, building, and deploying AI‑native tools or applications with measurable adoption.
• 5+ years of full‑stack development experience delivering real products.
• Strong product mindset focused on problems, outcomes, and impact.
• Comfortable operating with minimal guidance and without initial acceptance criteria.

Required skills

• Backend: Go, MySQL, Kafka, Docker, Kubernetes, AWS, Redis.
• Frontend: Next.js, React.js, TypeScript, GraphQL, Tailwind CSS, Cloudflare Workers.
• iOS: SwiftUI, Xcode, Combine, Swift Package Manager, MVVM Architecture.
• Android: Kotlin, Android Studio, Hilt, Coroutines, Jetpack Compose, MVVM Architecture.
• AI tools: Claude Code, OpenAI Codex, OpenCode, Cursor with Composer.

What we offer

• Training, mentorship and growth opportunities.
• Extra vacation days, sick days and flexible time off.
• Private health insurance in Lithuania and Poland.
• Free subscriptions to Calm, Headspace and Mindletic.
• In‑house gyms, sport cards and online workouts.
• Company‑wide workation trips.
• Remote work from anywhere.
• Team building events and a Vilnius HQ with coffee bar, gyms and more.