Backend Engineer | Senior | Transition to Go | Saily

At Saily, a company providing secure mobile data connectivity without roaming fees or plastic SIM cards in over 200 destinations, millions of paying customers use their service. The company fosters an AI-native Product Engineering culture where engineers solve customer problems end-to-end with AI agents supporting code generation and routine tasks.

• Over 4 years of experience in backend development
• Experience with backend languages: PHP, Python, C#/.NET, Java, Kotlin
• Proven knowledge of system design and design patterns
• Experience with Kubernetes and microservice architecture is a plus
• Experience with SQL databases (MySQL, PostgreSQL) and NoSQL databases (Cassandra, Redis)
• Experience with Kafka
• Passion for building user-friendly APIs
• Strong product mindset focused on problems, outcomes, and impact
• Curiosity about AI and willingness to work with AI agents

• Build a completely new sophisticated microservices system for the new eSim Product
• Create features to support layers of multi-dimensional personalization, A/B experimentation, and analytics
• Develop and maintain a high-quality codebase
• Seek to improve code and performance constantly
• Mentor colleagues on development best practices and provide technical guidance
• Exercise influence on the overall vision and long-range goals of your team
• Perform R&D operations whenever required
• Use AI agents for specifications, coding, analysis, testing, and iteration
• Work as part of a cross-functional team and help to ensure smooth communication between all team members
• Collaborate with engineering, product, and design professionals from other teams

Candidates are expected to provide accurate and complete information; limited AI use for application materials is allowed but candidates are responsible for submissions. AI-based application review tools are used for evaluation but do not replace human decision-making. Candidates may opt out by direct application via email.