[Hiring] Backend Engineer @A5 Sync

Role Description

This is a remote position. We are looking for a Backend Engineer (2+ years' experience) with strong TypeScript and Node.js experience designing, building, and maintaining scalable server-side applications for our multi-tenant B2B commerce platform.

• Work primarily with Express, PostgreSQL (TypeORM), Redis, and BullMQ workers.
• Collaborate closely with front-end developers and QA to deliver:
• REST APIs
• Background jobs
• Third-party integrations
• Design and implement RESTful APIs.
• Model data and write production-safe migrations using PostgreSQL and TypeORM.
• Build and operate background jobs and workers using Redis and BullMQ.
• Integrate third-party services and APIs, and webhooks.
• Optimize applications for performance, reliability, and operational safety.
• Troubleshoot and debug production issues across APIs, queues, and the database.
• Participate in code reviews and contribute to backend best practices.
• Document API behavior, technical designs, and specifications.
• Collaborate with cross-functional teams to scope and implement new features.
• Take full responsibility for the features you ship and follow through when something needs attention.

Qualifications

• 2+ years of professional experience with JavaScript/TypeScript (TypeScript strongly preferred).
• Strong experience with Node.js and Express.
• Solid experience with PostgreSQL and ORM (TypeORM preferred).
• Experience writing and reviewing database migrations for production systems.
• Experience with Redis and job queues such as BullMQ (or Bull / equivalent).
• Understanding of authentication, authorization, and security best practices (JWT, cookies/sessions, RBAC/permissions).
• Comfortable working within large, existing codebases and debugging production issues.
• Experience with version control systems like Git and collaborative code review.

Requirements

• Experience with multi-tenant SaaS, e-commerce, marketplace, or payments systems.
• Experience with dependency injection patterns (tsyringe, Inversify, or similar) - NestJS experience is a plus.
• Understanding of SOLID design principles, particularly interface-driven design and dependency inversion.
• Familiarity with Docker and containerization.
• Knowledge of CI/CD pipelines.
• Experience with cloud platforms/infrastructure (AWS, DigitalOcean, or Cloudflare).
• Exposure to testing frameworks like Jest.
• Experience with observability tools such as Sentry and structured logging.

Benefits

• Competitive salary based on experience.
• Festival Bonus: Standard 1-month Dashain/Tihar festival bonus.
• Generous Paid Time Off (PTO) and standard Nepali public holidays.
• Health and accidental insurance coverage.
• 100% Remote work from anywhere in Nepal (bring your own device/provided based on team placement).