Senior Backend Developer (Node.js)

Join us as a Senior Node.js Developer and become part of a team that builds an innovative product with clean code, bold solutions, and a strong team spirit! You’ll work directly with stakeholders, influencing key decisions and driving product growth. Zeely AI is a platform that leverages artificial intelligence to generate viral UGC videos and ad banners, and to launch effective ad campaigns on Facebook and Instagram — helping small businesses get noticed and grow. We already have 1 million users in the US, making us one of the Top 3 players in our vertical on the American market by active user count. Zeely is a stable product, growing more than 4x annually in the US, with a team of 130+ professionals. We are proud to be part of the Google for Startups Alumni community and official partners of Meta and TikTok. In 2024, Zeely was recognized among the Top 25 fastest-growing startups in Ukraine by Forbes. Your key responsibilities: Developing and maintaining the back-end of web applications Designing and building REST APIs Working with PostgreSQL and Redis databases Integrating with third-party APIs Building and deploying applications on AWS (EC2, S3, CloudFront) Writing unit and integration tests Optimizing application performance Debugging and troubleshooting issues Writing technical documentation Conducting code reviews What we’re looking for: 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) Nice to have: 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 Why it’s exciting to work with us: 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 Recruitment process: Intro call > Test Task > Technical Interview > Final Interview > Reference check > Offer Send us your CV — we’d love to get to know you better!