MERN Full Stack Developer

Job Title: Backend Developer (Kotlin/Java)

Experience: 5-7 Years

Location: Remote (Candidates from Pune/Mumbai preferred for training-related travel)

Salary: ₹15-25 LPA CTC (1L up to 1.5L In hand Per Month)

Job Description:

We are seeking a highly skilled Backend Developer with expertise in Kotlin/Java (not Android) to join our dynamic team. The ideal candidate will have experience building scalable backend solutions, working with relational databases, and utilizing modern frameworks like Spring and Webflux.

This is a remote role, but candidates based in Pune/Mumbai who can travel for training purposes will be preferred.

• Must-Have Skills:Kotlin/Java backend development (5+ years)
• Spring Boot/Webflux (Reactor) (1+ year)
• Relational Databases (PostgreSQL preferred) (2+ years)
• Strong problem-solving skills and attention to detail
• Excellent communication skills and professionalism

• Key Responsibilities:Develop and maintain backend services using Kotlin/Java.
• Design and implement scalable microservices with Spring Boot/Webflux (Reactor).
• Work with relational databases (PostgreSQL preferred) and ensure optimal data handling.
• Optimize backend performance and ensure system reliability.
• Collaborate with frontend, DevOps, and product teams to deliver high-quality software solutions.
• Ensure best practices in coding, security, and system design.

• Nice to Have:Experience with NoSQL databases (Cassandra/MongoDB)
• Knowledge of Kafka for event-driven architecture
• Familiarity with AWS, Docker for cloud-based deployments
• Exposure to full-stack development with React
• Understanding of ClickHouse for analytics

Company:

The client is a technology company specializing in custom software development, mobile app creation, cloud services, data analytics, applied AI, cybersecurity, web design, and UX/UI design. They emphasize building robust, scalable, and world-class software products and applications. Their expertise spans various technology stacks, including MERN, MEAN, applied AI, Oracle, AWS, GCP, Microsoft Azure, and PAAS. They have developed products such as Digirestro, Task Manager, and Attendance Management. The company operates from multiple locations, including Pune and Nagpur in India, and Kendall Park, New Jersey, USA.

• Why Join Us?Competitive salary (₹15-25 LPA)
• Remote work flexibility (with occasional travel to Pune/Mumbai for training)
• Opportunity to work on modern tech stacks
• Collaborative and professional work environment

Key Responsibilities: 

• Rewrite existing APIs in NodeJS. 
• Remodel the APIs into Micro services-based architecture. 
• Implement a caching layer wherever possible. 
• Optimize the API for high performance and scalability. 
• Write unit tests for API Testing.
• Automate the code testing and deployment process.

Skills Required: 

• At least 2 years of experience developing Backends using NodeJS — should be well versed with its asynchronous nature & event loop, and know its quirks and workarounds. 
• Excellent hands-on experience using MySQL or any other SQL Database. 
• Good knowledge of MongoDB or any other NoSQL Database. 
• Good knowledge of Redis, its data types, and their use cases. 
• Experience with graph-based databases like GraphQL and Neo4j. 
• Experience developing and deploying REST APIs. 
• Good knowledge of Unit Testing and available Test Frameworks. 
• Good understanding of advanced JS libraries and frameworks. 
• Experience with Web sockets, Service Workers, and Web Push Notifications. 
• Familiar with NodeJS profiling tools. 
• Proficient understanding of code versioning tools such as Git. 
• Good knowledge of creating and maintaining DevOps infrastructure on cloud platforms. 
• Should be a fast learner and a go-getter — without any fear of trying out new things Preferences. 
• Experience building a large scale social or location-based app.

Responsibilities

• Plan, develop and implement large-scale projects from conception to completion.
• Interface with clients and gather business requirements and objectives.
• Translate clients’ business requirements and objectives into technical applications and solutions.
• Understand and evaluate complex data models.
• Design, develop and implement new integration.
• Execute system development and maintenance activities.
• Develop solutions to improvise performance and scalability of systems.
• Mentor junior and mid-level engineers.

Minimum Requirements

• 3-5 years of relevant experience, working in Java related technologies.
• A Good Engineering or Masters degree from a reputed university
• Should have strong technical skills with a good grasp of OO concepts and design patterns

• Good knowledge of SQL database ( MySQL, Oracle, etc )
• Good understanding of frameworks like Spring, Hibernate, etc.
• Good understanding of spring boot and microservices.
• Exposure to AWS services - S3, SQS, Lambda, DynamoDB, API Gateway, etc.

Good to have

• Knowledge of No-SQL DBs like mongo, dynamoDB, etc.
• Knowledge of message brokers/queuing services like SQL, rabbitMQ, Kafka, etc.

Fulfil’s software engineers develop the next-generation technologies that change how millions of customer orders are fulfilled by merchants. Our products need to handle information at massive scale. We're looking for engineers who bring fresh ideas from all areas into our technology.

As a senior software engineer, you will work on our python based ORM and applications that scales to handle millions of transactions every hour. This is mission critical software and your primary focus will be building robust and scalable solutions that are easy to maintain.

In this role, you will be collaborating closely with the rest of the team working on different layers of infrastructure in an international environment. Therefore, a commitment to collaborative problem solving, sophisticated design, and quality product are important.

What You’ll Do:

• Own definition and implementation of API interfaces (REST and GraphQL). We take pride in our 100% open API with over 600 endpoints.
• Implement simple solutions to complex business logic that enables our merchants to manage financials, orders and shipments across millions of transactions.
• Build reusable components and packages for future use.
• Translate specs and user stories into reviewable, test covered patches.
• Peer review code and refactor existing code.
• Integrate with our eCommerce partners (Shopify, BigCommerce, Amazon), shipping partners (UPS, USPS, FedEx, DHL) and EDI.
• Manage Kubernetes and Docker based global deployment of our infrastructure.

Requirements We’re Looking for Someone With:

• Experience working with ORMs like SQLAlchemy or Django (2-3 years)
• Experience with SQL and databases (Postgres preferred)
• Experience in developing large server side applications and microservices
• Ability to create high quality code
• Experience with python testing tools (pytest) and test automation
• Familiarity with code versioning tools like GIT
• Strong sense of ownership and leadership quality
• Experienced in the tools of our web stack- Python, Celery, Postgres, Redis, RabbitMQ

Nice to Haves:

• Prior experience at a growth stage Internet/Software company
• Experience with ReactJS, Google Cloud, Heroku
• Cloud deployment and scaling experience

We're looking for Senior Node js backend developers with over 2+ years of experience and strong expertise in Javascript based development using Node js and Express. We are looking for cadidates who are go-getters and are leaning towards leadership positions. Candidates must have a proven history of building, scaling, optimising and securing Node js based backends and APIs using a microservice architecture.

Bonus Skill : Experience with ReactJs, Postgres

We would prefer candidates who can join immediately or are currently serving their notice period.

Key Skills Required

1. A passion for Javascript based solutions and an extremely strong understanding of JavaScript

2. Proficiency in Node js and Express based development

3. Stong experience in building scalable REST APIs

4. Experience in implenting API security using tokens, encryptions keys and other methods

5. A proved history of building scalable and secure web applications and APIs with Node js using a microservice architecture

6. Working experience with API Gateways

7. Experience with Docker

8. Experience in maintaining code via Git workflows

9. Ability to work independantly or as a part of a team

10. Ability to work in an Agile environment

Responsibilities

1. Understanding requirement and congributing to engineering solutions at a conceptual stage to provide the best possible solution to the task/challenge

2. Building high quality code using coding standards based on the SRS/Documentation

3. Building component based, maintainable, scalable and reusable backend libraries/modules.

4. Building & documenting scalable APIs on the Open Spec standard

5. Unit testing development modules and APIs

6. Conducting code reviews to ensure that the highest quality standard are maintained

7. Securing backend applications and APIs using industry best practices

8. Troubleshooting issues and fixing bugs raised by the QA team efficiently.

9. Optimizing code

10. Building and deploying the applications