Senior Backend Developer (Node.js / NestJS / AWS)

About usWe’re a Ukrainian startup building a new generation of route-optimization and delivery-automation tools for couriers, drivers, and service businesses.Our vision — transform chaotic, inefficient deliveries into a seamless, intelligent ecosystem for both individuals and companies.Now building a scalable, production-grade product from scratch — the foundation for future B2B ecosystemWe’re looking for a Senior Backend Engineer to lead the backend direction and help architect the foundation for a system designed to scale from thousands to millions of users.Your roleLead backend architecture for a next-generation mobile app that will scale to millions of users. Work directly with the founder to design the system's architecture, performance, and scalability.What you'll doArchitect and implement backend systems using Node.js (NestJS)Design scalable data models with PostgreSQL or MongoDBBuild a modular, high-performance backend ready for multi-service expansionDevelop containerized infrastructure (Docker + Kubernetes)Take part in the configuration and management of AWS environments (ECS/Lambda, S3, RDS, CloudWatch)Collaborate with mobile developers for seamless API integrationOptimize performance, scalability, and fault toleranceRequired skills4+ years of backend development with Node.js / TypeScriptExpertise with NestJS and microservice or monolithic architectureProficiency in PostgreSQL or MongoDB (schema design, indexing, scaling)Experience building distributed, high-load systemsStrong understanding of AWS (EC2, S3, Lambda, RDS, CloudWatch, IAM)Hands-on with Docker, Kubernetes, and CI/CDKnowledge of cloud-native design and horizontal scalabilityStrong ownership and independent decision-makingNice to haveEvent-driven systems (Kafka, RabbitMQ, SQS)Real-time data flows (WebSockets, Pub/Sub, Firebase)Clean architecture patternsSoft skillsStrong technical leadership and architectural thinkingClear communication and collaborationProactive problem-solving approachAbility to work independently in a startup environmentWhat we offerCore role from day one — shape the entire backend systemHalf autonomy to architect, experiment, and define standardsLong-term collaboration and meaningful technical growthDirect work with the founder, product, and designRemote-first, async-friendly, zero bureaucracyTo apply: Send your CV and briefly describe your most technically challenging backend project.