backend developer for travel connectivity

Saily helps travelers stay connected with fast, secure mobile data in more than 200 destinations, without roaming fees or physical SIM cards.

• Own product features end-to-end, from shaping ideas with Product and Design to shipping, measuring, and iterating
• Build features for multidimensional personalization, A/B experimentation, and analytics
• Make technical decisions with a product-focused perspective and understand the reasons behind them
• Develop and maintain a high-quality, high-performance Go codebase
• Mentor colleagues and improve engineering best practices
• Influence the team’s vision and long-term goals, contributing to decisions about what to build and how
• Run R&D spikes when the path forward is unclear
• Collaborate across engineering, product, and design in a cross-functional team

• 5+ Years of backend development experience and strong skills in Python, PHP, Ruby, or similar; readiness to work in Go daily
• Experience at a product company, ideally a startup or scale-up, where speed, ambiguity, and ownership are the norm
• Solid system design skills, including knowing which patterns to use and when
• Experience with SQL solutions such as MySQL and PostgreSQL, and NoSQL solutions such as Redis and Cassandra
• Experience with Kafka or similar event-driven systems
• Passion for building easy-to-use, simple-to-understand APIs
• Collaborative mindset and willingness to discuss, rethink, and redesign ideas toward shared success
• Будет плюсом: B2C experience, having built a product independently, experience with K8s and microservice architecture, a track record of shipping experiments, testing hypotheses, and measuring impact, comfort working with AI-native tools such as Claude Code, Codex, and Cursor

• Extra vacation days, sick days, and time off
• Private health insurance in Lithuania and Poland, fully covered
• Free subscriptions to Calm, Headspace, and Mindletic, plus resilience and mindfulness training
• In-house gyms, sport cards, online workouts, and personal guidance
• Company-wide workation trip abroad
• Birthday, wedding, and new family member gifts
• Children’s summer camps and schedule flexibility
• Team-building activities and company events
• Access to the Vilnius HQ’s coffee bar, open gyms, kids’ room, music room, and massage chairs
• Candidates must provide accurate and complete information during recruitment. Limited AI use to refine application materials is acceptable, but candidates remain responsible for ensuring submissions reflect their own qualifications, skills, and experience. Broader AI assistance, if allowed for a role or stage, will be communicated in advance. Applications may be processed using automated evaluation tools, including an AI-based application review tool; every application is ultimately reviewed by a recruiter. Candidates may ask for information about AI use or exercise applicable data privacy rights