Backend Developer

22 hours ago

Bengaluru, Karnataka, India Delightree Full time US$ 90,000 - US$ 1,20,000 per year

About The Role
We are seeking a
Backend Developer
with 1+ years of professional experience and strong expertise in GraphQL and MongoDB. The ideal candidate must have hands-on, non-negotiable experience with complex MongoDB aggregation pipelines and performance optimization. You will be responsible for building and maintaining scalable backend services, writing optimized database queries, and ensuring high performance of our APIs.

Key Responsibilities

  • Design, build, and maintain backend services using with GraphQL APIs.
  • Create efficient and maintainable MongoDB aggregation pipelines for data querying and reporting.
  • Ensure GraphQL schema design adheres to best practices for scalability and maintainability.
  • Optimize database queries for performance, indexing, and scalability.
  • Collaborate with frontend teams to design API contracts and improve data fetching strategies.
  • Write clean, reusable, and well-documented backend code.
  • Debug and troubleshoot production issues efficiently.
  • Implement security best practices in API development.
  • Participate in code reviews to maintain high-quality standards.

Required Skills & Experience

  • 1+ years of experience as a backend developer in a professional setting.
  • Strong proficiency in and JavaScript (ES6+).
  • Mandatory hands-on experience with GraphQL (queries, mutations, resolvers, schema stitching, performance optimization).
  • Non-negotiable expertise in MongoDB aggregation framework:
  • Complex data transformations.
  • Multi-collection joins using $lookup.
  • Grouping, filtering, projecting, and sorting with performance in mind.
  • Query optimization using indexes.
  • Experience with MongoDB query profiling and performance tuning.
  • Familiarity with database design and data modeling for NoSQL.
  • Understanding of authentication/authorization in APIs (JWT, OAuth).
  • Experience with Git and version control workflows.

Good To Have

  • Experience with TypeScript.
  • Knowledge of Graphql, Apollo Server and
  • Familiarity with caching strategies (Redis, in-memory caching).
  • Exposure to AWS services (Lambda, S3, EC2, or similar).

Soft Skills

  • Strong analytical and problem-solving abilities.
  • Ability to work independently and debug complex backend issues.
  • Effective communication and collaboration with cross-functional teams.
  • Proactive learning attitude to keep up with evolving backend technologies.

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