Backend Engineer | Senior | Go | Product & Startup Experience | Saily

At Saily, a product by Nord Security, we provide secure mobile data connectivity in 200+ destinations without roaming fees or plastic SIM cards, trusted by millions of paying customers and hundreds of thousands of travelers browsing at any given moment.

• 5+ years of backend development experience with strong skills in Python, PHP, Ruby, or similar
• Readiness to work in Go daily
• Experience in product companies, ideally startups or scale-ups
• Strong B2C experience preferred
• Solid system design skills
• Experience with SQL (MySQL, PostgreSQL) and NoSQL (Redis, Cassandra) solutions
• Experience with Kafka or similar event-driven systems
• Passion for building easy-to-use APIs
• Collaborative mindset

Nice to have:

• Experience building your own product or side project
• Experience with Kubernetes and microservice architecture
• Record of shipped experiments, tested hypotheses, and impact measurement
• Comfort working with AI-native tools like Claude Code, Codex, Cursor

• Own product features end-to-end from idea shaping through shipping, measuring, and iterating
• Build features supporting multi-dimensional personalization, A/B experimentation, and analytics
• Make technical decisions with a product lens
• Develop and maintain a high-quality, high-performance codebase in Go
• Mentor colleagues and raise engineering best practices
• Influence team's vision and long-range goals
• Run R&D spikes when the path forward isn't clear
• Collaborate across engineering, product, and design in a cross-functional team

Candidates must provide accurate and complete information; limited AI tool use for refining materials is allowed but final responsibility lies with the candidate. Applications may be processed with AI-based tools supporting human decision-making. Contact information is provided for data privacy inquiries and opting out of automated evaluation.