Middle JS Backend Developer

We’re looking for a Middle JS Backend Developer to help power an AI-driven go-to-market platform and boost the performance, scalability, and reliability of its backend ecosystem.
 

Join a fast-growing SaaS startup where your backend work will power an AI-driven platform used by modern go-to-market teams.

Beetroot is a trusted tech partner for startups and established brands worldwide. We’re helping our client scale their engineering capacity by expanding the backend team with skilled specialists who want to build meaningful technology.

Our client is a VC-funded SaaS startup with a commercially validated MVP. Their product combines automation, data insights, and AI assistance to help organizations optimize their sales and marketing operations.

In this role, you’ll directly shape the backend architecture of a platform used by modern go-to-market teams, ensuring high performance, scalability, and seamless integration across the ecosystem.

What you'll do in this role  

• Design, develop, and maintain scalable backend services and APIs using Node.js (Express/Nest.js) within the Next.js application ecosystem.
• Architect and implement RESTful APIs to support front-end applications.
• Integrate and manage third-party APIs and ensure seamless, reliable data flow across services.
• Collaborate with the Tech Lead to refactor existing code, improving maintainability and performance.
• Work closely with front-end developers to align server-side and client-side components.
• Contribute to product development, offering insights on feasibility, architecture, and technical trade-offs.
• Deploy and maintain applications in AWS, ensuring high availability and scalability.
• Participate in code reviews, technical discussions, and sprint planning.
• Document APIs, system architecture, and technical specifications.

We're looking for

• 3+ years of professional experience with Node.js.
• Strong proficiency in JavaScript/TypeScript and modern ES6+ features.
• Practical experience with Express.js or Nest.js.
• Solid experience working with MongoDB (schema design, aggregations, performance tuning)
• A proven track record of integrating third-party APIs (OAuth, API keys, webhooks)
• Familiarity with AWS services (EC2, S3, Lambda, RDS or similar)
• Experience designing RESTful APIs.
• Strong understanding of asynchronous programming and event-driven architecture.
• Experience using Git and modern collaboration workflows.
• Background working in Agile/Scrum teams.
• Strong problem-solving skills and attention to detail.
• Great communication and teamwork skills.

How to knock our socks off

• Experience with Next.js full-stack development.
• Integration experience with CRM systems (HubSpot, Salesforce, etc.)
• Experience working with OpenAI API or other LLM integrations.
• Familiarity with CI/CD pipelines and DevOps practices.
• Experience with AWS Lambda and serverless architectures.
• Knowledge of WebSocket implementation for real-time features.
• Hands-on experience with unit/integration testing (Jest, Mocha)
• Naming five or more dishes that include beetroot besides borshch.

✔ Not checking every box?

This job looks very exciting, but you hesitate to apply because of the confidence gap? Reach out to us anyway! Beetroot is an inclusive workplace that considers all applicants. We’re committed to openness — promoting equality and fostering an environment where different backgrounds, ideas, and experiences are not just accepted, but embraced. So let’s discover together whether we could be an excellent fit for each other.

Please send us your CV in English, and we'll be happy to discuss your application further.