Sr. MERN Stack Developer

Job Summary

We are seeking an experienced Senior MERN Stack Developer with a strong background in building scalable, high-performance, and event-driven web applications. The ideal candidate will be an expert in Node.js, Express.js, and modern JavaScript (ES2021+) , with proficiency in MongoDB , Redis , and Kafka .

This role demands deep technical expertise in back-end and front-end development using the MERN stack, coupled with hands-on experience in real-time data streaming , search optimization , and intelligent caching strategies . The candidate should also have a solid understanding of TypeScript , microservices , and cloud-based data solutions such as BigQuery and Google Cloud Retail Search (Vertex AI) .

Key Responsibilities

• Design, develop, and maintain scalable applications using MongoDB, Express.js, React.js, and Node.js .
• Implement and optimize event-driven architectures using Kafka with robust producer–consumer design patterns.
• Architect and manage MongoDB schemas , aggregation pipelines , and indexing strategies for performance and scalability.
• Utilize Redis for intelligent caching, session management, and distributed locking.
• Integrate and fine-tune search platforms like Algolia and Google Cloud Retail Search (Vertex AI) to enhance user experience.
• Design and manage data flows using BigQuery or equivalent data warehouse systems for analytics and insights.
• Collaborate with cross-functional teams including product managers, UI/UX designers, and DevOps engineers to deliver end-to-end solutions.
• Conduct code reviews, enforce best practices, and mentor junior developers.
• Implement CI/CD pipelines and automated testing for consistent, high-quality deployments.
• Monitor system performance, troubleshoot issues, and optimize code for scalability and reliability.

Required Technical Skills

• Languages & Frameworks:
  • Expert in Node.js (v18+) , Express.js , and JavaScript (ES2021+)
  • Strong understanding of asynchronous event loops , non-blocking I/O , and concurrency control
  • Experience with TypeScript preferred
• Databases & Storage:
  • Advanced MongoDB skills (schema design, aggregation pipelines, indexing optimization)
  • Proficiency with Redis for caching, session handling, and distributed systems
  • Familiarity with SQL databases (e.g., PostgreSQL)
• Event-Driven Architecture:
  • Deep expertise in Kafka (producers, consumers, partitioning, offsets, consumer groups)
  • Experience with message deduplication , event replay , and idempotent processing
• Search & Data Systems:
  • Hands-on integration with Algolia Search API and Google Cloud Retail Search (Vertex AI)
  • Understanding of ranking models , facet optimization , and query expansion
  • Experience with BigQuery or equivalent data warehouse tools
  • Knowledge of search analytics , user behavior tracking , and A/B testing pipelines

Nice-to-Have Skills

• Experience with React.js (v18+) , Next.js , or TypeScript-based front-end frameworks.
• Exposure to Docker and Kubernetes.
• Familiarity with WebSockets , and microservices architecture

Soft Skills

• Strong analytical and problem-solving skills with attention to detail.
• Excellent communication and collaboration abilities across technical and non-technical teams.
• Proven leadership and mentorship experience.
• Proactive approach to innovation, optimization, and continuous learning.
• Strong sense of ownership and accountability in delivering high-quality software.