SDE 1 - Backend Developer Java / Node.js

Key Responsibilities

• Design, develop, and maintain scalable backend applications using Java and Spring Boot.
• Develop and maintain RESTful APIs following best practices.
• Implement API versioning strategies to support backward compatibility.
• Create and maintain API documentation using Swagger/OpenAPI.
• Implement Spring Transaction Management to ensure data integrity
• Use Spring Data JPA for database interactions and ORM mapping
• Write efficient SQL queries and optimize database performance
• Implement CQRS (Command Query Responsibility Segregation) where applicable.
• Develop systems based on event-driven architecture patterns.
• Write unit tests using JUnit and Mockito.
• Build and manage projects using Maven or Gradle build scripts.
• Use AI coding assistants such as Gemini Code Assist or similar tools to improve development efficiency.
• Participate in code reviews, design discussions, and architecture decisions.
• Collaborate with frontend teams, DevOps engineers, and product stakeholders.
• Strong problem-solving and debugging abilities
• Ability to design highly scalable backend systems
• Experience working in Agile/Scrum environments
• Good communication and collaboration skills
• Strong code quality and clean architecture mindset

Optional / Good to Have Skills

• Experience with Docker
• Knowledge of Kubernetes
• Experience with GraphQL API development
• Experience with cloud platforms (GCP / AWS / Azure)

Candidates from Supply Chain , Retail preferred

Full stack Developer (Ref.ID: VRPL-FSD-Chn-0326)

No. of Positions: 2 Nos. Senior 1 No. Junior 1 No.

API Development & Architecture:

Design and develop scalable RESTful APIs using Node.js & TypeScript

Build modular, reusable, and clean backend architecture

Implement authentication & authorization (JWT / OAuth / Role-based access)

Ensure API security best practices

Write well-structured documentation (Swagger / Postman)

Real-Time Communication (Sockets):

Develop real-time features using WebSockets / Socket.io

Implement:

Live tracking

Real-time notifications

Status updates

Chat systems

Optimize socket performance and reconnection handling

Ensure scalability under concurrent user load

Database & Data Layer (PostgreSQL):

Design scalable and optimized database schemas

Write complex SQL queries & joins

Implement indexing & query optimization

Handle transactions and concurrency control

Work with ORMs like Prisma / TypeORM (preferred)

Maintain database security and backup strategies

Ensure data security and backups

Performance & Scalability:

Optimize API response times

Implement caching strategies (Redis preferred)

Design rate limiting and throttling mechanisms

Ensure system reliability & fault tolerance

Handle background jobs & queues

Deployment & DevOps Collaboration:

Deploy applications on AWS / GCP

Work with Docker containers

Implement CI/CD pipelines

Monitor logs & performance metrics

WhatsApp Business Integration:

Integrate WhatsApp Business API (Cloud / On-Premise)

Work with providers like Exotel / Twilio (preferred)

Implement Template messaging

OTP authentication

Notifications & alerts

Two-way communication

Manage webhook events and delivery tracking

Ensure compliance with WhatsApp policies

Required Skills:

Strong proficiency in Node.js

Hands-on experience with TypeScript

Strong experience in PostgreSQL

Experience building RESTful APIs

Experience with WebSockets / Socket.io

Good understanding of system design & architecture

Git version control

Knowledge of API security best practices

Preferred Skills:

Experience in real-time platforms (ride-hailing, delivery, chat systems)

Redis for caching

Message queues (Kafka / RabbitMQ / BullMQ)

Microservices architecture

Payment gateway integration

Cloud infrastructure knowledge

Soft Skills:

Strong analytical, problem-solving skills, and debugging skills

Startup mindset & ownership attitude

Ability to work in fast-paced startup environment and work independently

Good communication skills in all aspects

We're looking for highly skilled experienced engineers to design and build high-scale, cloud-based data processing systems that can handle massive amounts of data with low latency. You'll work with a team of smart, motivated, and diverse people and be given the autonomy and support to do your best work. This is a rare opportunity to make a meaningful impact in society while working in a dynamic and flexible workplace where you'll belong and be encouraged.

Qualifications:

• Bachelor's Degree required
• Significant experience with distributed systems.
• Experience with modern programming languages such as Java, C#, C/C++, or Ruby.
• Experience with container platforms such as DC/OS, Kubernetes
• Fluency in technologies and design concepts around Big Data processing and relational databases, such as the Hadoop ecosystem, Map/Reduce, stream processing, etc.
• Experience with production operations and good practices for putting quality code into production and troubleshooting issues when they arise.
• Effective communication of technical ideas verbally and in writing, including technical proposals, design specs, architecture diagrams, and presentations.
• Ability to collaborate effectively with the team and other stakeholders.
• Preferably, production experience with Cloud and data processing technologies.

Responsibilities:

As a member of the software engineering division, you will take an active role in the definition and evolution of standard practices and procedures. Define specifications for significant new projects and specify, design and develop software according to those specifications. You will perform professional software development tasks associated with the developing, designing and debugging of software applications or operating systems.

• Design and build distributed, scalable, and fault-tolerant software systems.
• Build cloud services on top of the modern OCI infrastructure.
• Participate in the entire software lifecycle, from design to development, to quality assurance, and to production.
• Invest in the best engineering and operational practices upfront to ensure our software quality bar is high.
• Optimize data processing pipelines for orders of magnitude higher throughput and faster latencies.
• Leverage a plethora of internal tooling at OCI to develop, build, deploy, and troubleshoot software.

Required skills:-

2+ years of experience in the Development of JAVA technology.

Strong Java Basics

SpringBoot or Spring MVC

Hands-on experience on Relational Databases (SQL query or Hibernate) + Mongo (JSON parsing)

Proficient in REST API development

Messaging Queue (RabitMQ or Kafka)

Microservices

Any Caching Mechanism

Good at problem-solving

Good to Have Skills:

2+ years of experience in using Java/J2EE tech stacks

Good understanding of data structures and algorithms.

Excellent analytical and problem solving skills.

Ability to work in a fast-paced internet start-up environment.

Experience in technical mentorship/coaching is highly desirable.

Understanding of AI/ML algorithms is a plus.

Design, develop, and maintain software application following established standards,
procedures, and specifications.

• Strong problem-solving and troubleshooting skills.
• Proactively seeks solutions to improve processes and applications.
• Interfacing with support and other teams for testing, delivery and product dependencies.
• Candidate must have strong and proven experience in C# and .Net Core.

Desired Candidate Profile

We are looking for developers with 2+ years of experience who love challenges and have experience building web applications at scale. Work as a contributing member of a software development team using modern software development techniques to produce best software for Web Applications.

Any Graduate

• Strong hands on in Core Java, OOPS, Exception handling, Multi-Threading, Generics and design patterns.
• Proficient in designing and developing web applications using Java/JEE
• Working experience in Spring Boot, Spring Integration and REST Web services
• Exposure to UI technologies/frameworks like JavaScript, React JS , Flux and knowledge of CSS, HTML etc
• Build tools like Maven.
• Should possess good communication skills and a go getter attitude.
• Good in debugging code through eclipse and browsers
• Should be capable to work independently. Desirable
• Experience in any Continuous Integration/Delivery tools like GIT, Docker, Jenkins, Ansible
• Working knowledge of database like Oracle and application server like Tomcat, WebLogic.
• Knowledge of Linux
• Exposure to any test automation technologies such as Selenium, Fitnesse, Mockito, Junit, any other testing frameworks
• Candidate must to have exposure to working in a fast-paced environment using Agile methodologies
• A person with technical thrust who keeps him up to date with latest technology trends, practices, patterns etc. Knowledge of Open Source tools and technologies

• Good academic qualifications
• Experience in developing web applications using Java, Spring, Hibernate, DWR, JSP
• Knowledge in Oracle Database concepts
• Sound knowledge in the following is a must
  o Hibernate
  o Spring
  o Oracle & MongoDb
  o HTML & CSS
  o Javascript
  o Jquery
  o Angular 4
  o Node JS
  
  Knowledge of Japer Reports will be an added advantage
• Good communication skills and be a good listener
• Problem solving skills
• Willingness to learn and do all development activities including quality assurance
• Team player