SDE III

GreyOrange; Gurugram District; On-site; INR 2,500,000 - 4,000,000; Full time

Job summary

GreyOrange is seeking a highly skilled Software Development Engineer 3 to design, develop, and scale backend systems using Java and Kotlin. You will build RESTful services, microservices, and distributed architectures, while applying OOP, SOLID, and design patterns to deliver high-performance applications.

You will collaborate with product managers and architects, mentor junior engineers, participate in HLD/LLD discussions, and focus on performance optimization, code quality, and production

Qualifications

• Strong hands-on programming experience in Java and Kotlin.
• Excellent understanding of Data Structures and Algorithms (DSA).
• Strong knowledge of Object-Oriented Programming (OOP), SOLID principles, and design patterns.
• Experience with Spring Boot, Spring Framework, and REST APIs.
• Strong experience in microservices architecture and backend development.
• Good understanding of system design, HLD, and LLD.
• Experience with SQL/NoSQL databases and database optimization.
• Knowledge of multithreading, concurrency, JVM, and memory management.
• Experience with Git, unit testing, debugging, and code reviews.

Responsibilities

• Design, develop, and maintain scalable backend applications using Java and Kotlin.
• Build and maintain RESTful APIs, backend services, and microservices.
• Design and implement distributed systems and scalable software architectures.
• Apply strong knowledge of Object-Oriented Programming (OOP), SOLID principles, and design patterns.
• Work on data structures, algorithms, multithreading, concurrency, and performance optimization.
• Develop reliable, secure, and high-performance applications.
• Participate in High-Level Design (HLD) and Low-Level Design (LLD) discussions.
• Identify and resolve complex technical issues, performance bottlenecks, and production bugs.
• Conduct code reviews and maintain coding standards and engineering best practices.
• Collaborate with product managers, architects, and cross‑functional engineering teams.
• Mentor junior engineers and contribute to technical decision‑making.

Skills

Java

Kotlin

REST APIs

Spring Boot

Microservices

OOP

SOLID

Design patterns

DSA

Multithreading

JVM

Memory management

Git

Unit testing

Debugging

Code reviews

System design

Tools

Spring Framework

Git

JUnit

Job description

We are looking for a highly skilled Software Development Engineer 3 (SDE 3) with strong hands‑on experience in Java and Kotlin to design, develop, and scale high-performance backend applications. The ideal candidate should have expertise in object-oriented programming, backend engineering, distributed systems, microservices architecture, and system design.

The candidate should be comfortable working on complex technical challenges, building scalable services, optimizing application performance, and contributing to architectural decisions.

Responsibilities

• Design, develop, and maintain scalable backend applications using Java and Kotlin.
• Build and maintain RESTful APIs, backend services, and microservices.
• Design and implement distributed systems and scalable software architectures.
• Apply strong knowledge of Object-Oriented Programming (OOP), SOLID principles, and design patterns.
• Work on data structures, algorithms, multithreading, concurrency, and performance optimization.
• Develop reliable, secure, and high-performance applications.
• Participate in High-Level Design (HLD) and Low-Level Design (LLD) discussions.
• Identify and resolve complex technical issues, performance bottlenecks, and production bugs.
• Conduct code reviews and maintain coding standards and engineering best practices.
• Collaborate with product managers, architects, and cross‑functional engineering teams.
• Mentor junior engineers and contribute to technical decision‑making.

Requirements

• Strong hands‑on programming experience in Java and Kotlin.
• Excellent understanding of Data Structures and Algorithms (DSA).
• Strong knowledge of Object‑Oriented Programming (OOP), SOLID principles, and design patterns.
• Experience with Spring Boot, Spring Framework, and REST APIs.
• Strong experience in microservices architecture and backend development.
• Good understanding of system design, HLD, and LLD.
• Experience with SQL/NoSQL databases and database optimization.
• Knowledge of multithreading, concurrency, JVM, and memory management.
• Experience with Git, unit testing, debugging, and code reviews.