Senior Backend Developer (Node.js)

Format: Remote, outstaff
Responsibilities
Design, develop, and maintain scalable microservices using Node.js, NestJS, and TypeScript
Build and optimize high-load backend services processing real-time data and serving millions of users
Develop and optimize marketing and mass-notification pipelines, including bulk messaging campaigns for a multi-million user base
Design and implement event-driven architectures using Kafka and other messaging technologies
Work with ClickHouse for analytics and high-volume data processing, as well as MySQL/PostgreSQL and MongoDB
Design and develop internal CRM solutions to support customer data management and business operations
Ensure high performance, reliability, scalability, and fault tolerance of backend services
Collaborate with other engineering teams to design and deliver scalable solutions
Required Qualifications
Mandatory: proven commercial experience in the gambling/betting industry, working with high-load products serving millions of users
5+ years of commercial backend development experience
Expert-level knowledge of Node.js, NestJS, and TypeScript
Strong experience with Kafka, RabbitMQ, or similar message brokers
Hands-on experience with ClickHouse or other big-data/analytical storage solutions
Strong knowledge of MySQL/PostgreSQL and MongoDB
Experience with Docker and Kubernetes
Proven experience designing and implementing microservice and event-driven architectures
English — Intermediate or above
Nice to Have
Experience working with FinTech or crypto platforms
Experience with Python (Django/Flask) and Celery
Experience with AWS or GCP
Previous experience working in remote or outstaffing teams