Senior Software Engineer (Comms Core)

Role overview Build and operate backend infrastructure that delivers high volumes of customer communications reliably and on time. You’ll shape services for orchestration, delivery, preferences, templates, and observability across multi-region, multi-tenant environments, while helping teams meet technical goals and improve resilience. The position is remote within Poland and includes participation in an on-call rotation.

Responsibilities - Own quarterly technical goals for communications infrastructure and resolve open-ended engineering problems with teammates. - Design and evolve reliable backend services for large-scale messaging across regions and tenants. - Build and operate integrations with external messaging providers, accounting for reliability, latency, cost, and compliance. - Partner with product, design, analytics, security, and engineering teams throughout delivery, explaining trade-offs and technical constraints. - Define service objectives and metrics, improve alerting and incident response, and take part in on-call support. - Raise engineering quality through better design, testing, code review, rollout, and operational practices; mentor teammates and provide technical direction.

Requirements - At least five years of software engineering experience, with a strong grounding in system design and architecture. - Proficiency in Python, Kotlin, or a similar modern programming language. - Experience building highly available distributed systems using technologies such as AWS, MySQL, DynamoDB, and Kubernetes. - Experience designing multi-region, multi-tenant systems with isolation, scaling, recovery, and data consistency in mind. - Experience integrating third-party communications or messaging providers and handling their varied capabilities, rate limits, and failure modes. - Ability to plan and deliver significant system changes, work safely in a large codebase, communicate well, and evaluate AI-assisted coding suggestions carefully.

Benefits and work setup The role is remote-first within Poland. Listed benefits include private healthcare, paid leave and holidays, wellness and learning support, family and mental health resources, a technology setup stipend, and an employee stock purchase plan.