At Pooleno, we’re on a mission to build innovative, high-quality solutions that empower people to trade and invest with confidence. We’re passionate about creating products that are reliable, secure, and easy to use — and we know this is only possible with talented, curious, and driven people on our team.
We’re looking for a Senior Node.js Backend Developer to join us and help shape the future of our platform while working alongside a group of supportive, skilled professionals who care about excellence and collaboration.
Required Skills
Strong proficiency in Node.js and solid understanding of JavaScript fundamentals
Hands-on experience with the NestJS framework
In-depth knowledge of Microservices Architecture and building scalable, distributed systems
Proficiency with messaging/streaming systems such as Kafka or NATS, including designing reliable event-driven workflows
Strong experience with databases:
Relational (PostgreSQL, MySQL)
NoSQL (MongoDB, Redis)
Proficiency in TypeScript and clean, modular code practices
Experience writing unit and integration tests with modern frameworks to ensure system reliability
Strong understanding of Cloud-Native principles and deployment practices (Kubernetes, container orchestration)
Practical experience applying Software Design Patterns in backend services
Solid knowledge and application of Domain-Driven Design (DDD)
Familiarity with CQRS (Command Query Responsibility Segregation) and event-driven architectures
Experience ensuring non-functional qualities such as low-latency performance, high availability (HA), and fault tolerance in backend systems
Strong awareness of security best practices (API security, secrets management, encryption, compliance requirements)
Experience working in Agile teams (Scrum/Kanban) with iterative delivery practices
Ability to produce clear, maintainable technical documentation (APIs, architecture, design decisions)
Strong teamwork and collaboration skills with cross-functional teams (QA, DevOps, Product, Frontend)
Preferred Skills (Nice to Have)
Experience with CI/CD pipelines and automation (GitLab CI/CD, GitHub Actions, Jenkins, etc.)
Familiarity with Docker and containerization concepts
Experience working with gRPC for service-to-service communication
Exposure to monitoring/logging stacks (Prometheus, Grafana, ELK, OpenTelemetry) for observability
Experience in implementing advanced distributed system patterns (Saga, Event Sourcing, Outbox pattern)
Knowledge of disaster recovery strategies and backup/restore practices in distributed databases
Responsibilities
Design, develop, and maintain scalable backend microservices using NestJS and Node.js
Build and optimize APIs for high-performance, low-latency trading systems
Integrate services with Kafka/NATS for real-time messaging and event-driven workflows
Design and maintain schemas across PostgreSQL, MySQL, and MongoDB databases, ensuring data consistency, availability, and partition tolerance
Apply DDD, CQRS, and design patterns to deliver clean, maintainable, and testable code
Ensure backend services meet non-functional requirements such as throughput, resilience, observability, and compliance
Write comprehensive unit and integration tests to ensure system reliability under production load
Implement monitoring, logging, and alerting to detect issues proactively and support incident response
Collaborate within an Agile team, participating in sprint planning, daily standups, and retrospectives
Produce and maintain documentation for APIs, services, architecture, and operational runbooks
Work closely with cross-functional teams (DevOps, QA, Product) to ensure secure, compliant, and resilient delivery
Participate in code reviews and architecture discussions, contributing to team knowledge sharing and continuous improvement
هولدینگ بیتکس در مسیر توسعه محصولات حوزه فینتک قدم برمیداره. ما از نیمه نخست سال ۱۳۹۹ طراحی و توسعه پلتفرمهای حوزه دیفای و معاملات رمزارز رو شروع کردیم، کم کم به سمت هوش مصنوعی رفتیم و در نهایت به دنیای طلایی معاملات آنلاین طلای آب شده قدم گذاشتیم. به این ترتیب با شرکت «بستر یگانه تحول کیش» جای خودمون رو در عرصه فناوریهای نوین مالی باز کردیم. ما در بیتکس طرفدار پر و پا قرص تکنولوژی در حوزه مالی هستیم و جمعی از خبرهترین متخصصان و نوآوران این حوزه رو کنار هم آوردیم.
طی سالهای فعالیتمون موفق به توسعه ۳ محصول شدیم:
صرافی پول نو: پول نو یک بستر خرید و فروش رمزارزه که به صورت OTC معامله رمزارزها رو به سادگی برای مردم کشورمون فراهم میکنه. پول نو از سال ۱۳۹۹ شروع به کار کرده و برای کاربران رمزارز در ایران نامی شناخته شده است.
زربان: اولین پروتکل دیفای در ایرانه که خدمات وام،سپردهگذاری و ایجاد توکن زر رو به صورت غیر متمرکز در اختیار کاربران میگذاره. ما با توسعه زربان گامی بلند به سمت ارائه خدمات دیفای به دوستداران دنیای غیر متمرکز برداشتیم.
طلانو: بستر امن خرید و فروش طلای آب شده طلانو رو توسعه دادیم تا راهی قابل اتکا باشه برای تمام کسانی که دوست دارن ارزش پولشون رو با خرید طلا حتی با مقادیر کم حفظ کنن.