Senior Backend Developer (Node.js)

Join Zeely AI as a Senior Backend Developer and help build one of the largest AI products for businesses. We're looking for a strong backend engineer who wants to work on high-load services, influence architectural decisions, and build systems that scale alongside a rapidly growing business.

Over the past six months, our backend team has grown to 14 engineers, and we're continuing to expand. Today, Zeely is the #1 AI product in its niche in the U.S. market, and our ambitious goal is to become a global company by 2028.

You'll be joining a strong engineering environment, working alongside former Tech Leads, Engineering Managers, and Senior Engineers who foster a high engineering standard, support each other's growth, and tackle complex technical challenges together.

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  Developing and maintaining the back-end of web applications

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  Designing and building REST APIs

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  Working with PostgreSQL and Redis databases

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  Integrating with third-party APIs

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  Building and deploying applications on AWS (EC2, S3, CloudFront)

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  Writing unit and integration tests

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  Optimizing application performance

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  Debugging and troubleshooting issues

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  Writing technical documentation

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  Conducting code reviews

• 5+ years of commercial experience with Node.js applications

• 1+ years of experience with microservices architecture

• 2+ years of hands-on work with Redis and PostgreSQL/MySQL (data modeling, indexing, caching, ORM such as Prisma/TypeORM/Drizzle ORM)

• Experience with AWS

• 2+ years of experience with message brokers

• 1+ years of experience with Docker

• Understanding of scalable and reliable system design principles

• Experience with version control systems (Git)

• 1+ years of experience with the NestJS framework

• Experience with payment systems

• Valid AWS certification

• Commercial experience with high-load systems

• Experience building back-end for iOS, Android, and web applications

• Experience with Terraform/Pulumi

• Commercial experience with AI APIs

• English level: Upper-Intermediate

• Work with cutting-edge technologies and contribute to building AI-powered tools

• Join a strong A-level team that motivates you to grow and achieve more

• Remote-first approach: work from anywhere, with the option to visit our offices in Warsaw and Kyiv

• Paid day offs and sick leaves — we care about your work-life balance

• Regular performance reviews to ensure your growth is transparent and rewarded

• Financial support — consultations for private entrepreneurs from our dedicated finance team