Back End Developer SDE-3

Backend Software Development Engineer - 3 (SDE-3)

Location: Noida

Experience: 5–9 Years

Employment Type: Full-time

About PhysicsWallah

PhysicsWallah (PW) is one of India's leading product-based EdTech companies, building technology that empowers millions of learners across the country. Our engineering teams solve large-scale, high-impact problems while building reliable, scalable, and high-performance systems that serve millions of daily users.

Role Overview

We are looking for an experienced Backend SDE-3 to build and scale mission-critical backend services powering our B2C platform. You will be responsible for designing highly available, fault-tolerant, and scalable distributed systems while collaborating closely with Product, Engineering, and cross-functional teams.

This role is ideal for engineers who enjoy solving complex system design challenges, optimizing performance at scale, and taking end-to-end ownership of backend services.

Key Responsibilities

• Design, develop, and maintain scalable backend services and microservices.
• Build high-performance APIs and distributed systems capable of handling millions of requests.
• Architect reliable, secure, and fault-tolerant systems with high availability.
• Optimize application performance, database queries, and system reliability.
• Work with event-driven architectures using messaging systems like Kafka.
• Design efficient caching strategies using Redis.
• Collaborate with Product Managers, Frontend Engineers, QA, and DevOps teams to deliver high-quality features.
• Drive engineering best practices, code reviews, mentoring, and technical discussions.
• Participate in architecture decisions and contribute to long-term platform scalability.

Required Skills

• 5–9 years of backend development experience in product-based organizations.
• Strong hands-on experience with Node.js and/or Golang .
• Strong understanding of Data Structures & Algorithms .
• Experience in designing scalable microservices architecture .
• Strong expertise in System Design and distributed systems.
• Hands-on experience with Kafka or similar messaging platforms.
• Strong knowledge of Redis for caching and performance optimization.
• Experience with MongoDB and database optimization.
• Good understanding of REST APIs, asynchronous processing, and event-driven architecture.
• Experience with cloud environments, containerization, and CI/CD is an added advantage.
• Strong debugging, analytical, and problem-solving skills.