Backend Developer

Kolkata, West Bengal, India

Contract to hire, null months

Software Engineering & Technology

4 - 6 years

Job Description:

• We are looking for a talented Software Engineer with expertise in the Spring Boot frame work

to join our development team.
- Developing, and maintaining robust, scalable, and secure backend solutions for our

products.
- This is an exciting opportunity to work on cutting-edge projects in a collaborative

and growth-oriented environment.

Experience Range:

4 - 6 years

Educational Qualifications:

B.Tech/B.E

Job Responsibilities:

• Design and implement backend services using Spring Boot.
• Build RESTful APIs to support seamless integration with frontend applications.
• Design and manage relational and/or NoSQL databases such as MySQL, and

MongoDB.
- Write optimized queries and ensure efficient database performance.
- Develop and maintain microservices-based architecture.
- Implement inter-service communication using tools like Kafka or RabbitMQ.
- Write clean, maintainable, and well-documented code.
- Conduct unit testing using tools like JUnit and integration testing to ensure

application quality.
- Identify and resolve performance bottlenecks.
- Optimize application performance for scalability and reliability.
- Work closely with cross-functional teams including frontend developers,
- QA

engineers, and product managers to deliver high-quality solutions.
- Participate in agile processes such as sprint planning and code reviews.

Skills Required:

Java , Spring Boot , Rest ful APIS , MySQL , MongoDB , Kafka or Rabbit MQ

Job Code: KL-DZFN82RW

About Us

Mantra Labs is a global technology leader specializing in Digital, Data, AI, and Engineering, empowering fast-evolving enterprises to achieve transformational growth.

With best-in-class digital product engineering, technology transformation, and AI-driven solutions, we help Fortune 500 clients in BFSI, healthcare, and consumer internet sectors optimize digital infrastructure, enhance decision-making, and maximize operational efficiency. Our track record spans 200+ successful projects, consistently simplifying customer journeys and scaling businesses for unprecedented growth.

As a CMMI Level 3 and ISO 27001:2013 certified company, we are committed to innovation excellence. Partnered with AWS, Microsoft Azure, Google Cloud, Nvidia, IBM Watson, MongoDB, Rakuten, and Katalon, we deliver tailored, future-ready solutions for our clients to tackle the complex business challenges of tomorrow head-on.

Key Clients: AbbVie Pharmaceuticals, SAAB, PACE Industries, American Auto Club, Change Healthcare, Green Brilliance, ICICI Lombard General Insurance, SBI General Insurance, Care Health Insurance, Pramerica, Aditya Birla Health, AIA Hong Kong, and more.

Why Us?

We are Technology Tinkerers and Experimenters. Building intuitive solutions for our Clients has led to significant milestones over the last 14 years.

The driving force behind Mantra is its team of change agents who focus on practical applications of the latest technologies.

You will find us often having animated debates over Node vs Java or RDBMS vs NoSQL Dbs. Geekiness is our thing and we absolutely love it Freedom at work is at the core of what we aspire to do.

Be it project parties, team outings, or free Coffee We like to celebrate our life in the office. Our cricket team trains regularly while TT acts as a quick stress-buster on a hectic day.

Our internal library has books from multiple genres to help Mantriks declutter their minds.

We have a certification policy to help our employees learn while they earn.

Our Knowledge sharing sessions include hackathons, training, trivia, quizzes, and presentations to help our employees upgrade their skills.

We have a trust-based leave policy where all the leaves are allotted in one go. No accrual business.

We take our Annual Trip very seriously - be it a weekend in Sakleshpur or Gokarna - the whole company goes as one.