
Job Description
- Managing the interchange of data between the server and the users.
- Development of all server-side logic, ensuring high performance and responsiveness to requests from the front-end Integrating the front-end elements built by your co-workers into the application; therefore, a basic understanding of front-end technologies is necessary as well.
- Writing reusable, testable, and efficient code.
- Design and implementation of low-latency, high-availability, and performant applications.
- Integration of user-facing elements developed by front-end developers with server-side logic
- Implementation of security and data protection.
Expected experience with
- Should have worked on the Django REST framework.
- Familiarity with some Pandas, Numpy, text parsing/mining and ORM (Object Relational Mapper) libraries
- Able to integrate multiple data sources and databases into one system
- Understanding of the threading limitations of Python, and multi-process architecture
- Good understanding of server-side templating languages
- Worked on Amazon cloud solutions
- Understanding of accessibility and security compliance
- Knowledge of user authentication and authorization between multiple systems, servers, and environments
- Understanding of fundamental design principles behind a scalable application
- Familiarity with event-driven programming in Python
- Able to create database schemas that represent and support business processes
- Strong unit test and debugging skills
- Proficient understanding of code versioning tool
- Excellent written and verbal communication skills.
- Should know about HDL and LLD.
- Should know about making python packages
- Should have worked on microservice-based Architecture

About Klaar
About
Klaar is an HR Tech SaaS startup that enables organizations to create a talent-first culture of continuous learning, growth, amazing leadership, and high performance. Funded by industry-leading angel investors from India and VCs from the USA, Klaar is already live in unicorns, enterprises, and other startups. We are set to disrupt the exploding HR Tech space. Globally.
We pride ourselves on having one of the best work cultures in the startup ecosystem. We are a remote-first company where we believe in freedom >> policies. You will get to work directly with the founders and be a part of the early-stage core team. This is an opportunity to build a SaaS startup from the ground up. The founders are directly involved in ensuring that the team has ample opportunities for growth and progress.
Connect with the team
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BACKEND DEVELOPER JOB DESCRIPTION
Job Title: Backend Developer - Node.js & MongoDB
Location: Hyderabad
Employment Type: Full-Time
Experience Required: 3–5 Years
About Us
Inncircles – THE INNGINEERING COMPANY
We are a forward-thinking construction-tech innovator building CRM solutions that manage crores of records with precision and speed. Our mission is to revolutionize the construction domain through scalable engineering and robust backend systems. Join us to solve complex challenges and shape the future of data-driven construction tech!
Job Description
We are hiring a Backend Developer with 3–5 years of hands-on experience in Node.js and MongoDB to design, optimize, and maintain high-performance backend systems. You will work on large-scale data processing, external integrations, and scalable architectures while ensuring best coding practices and efficient database design.
Key Responsibilities
Backend Development & Optimization
- Develop and maintain RESTful/GraphQL APIs using Node.js, adhering to best coding practices and reusable code structures.
- Write optimized MongoDB queries for collections with crores of records, ensuring efficient data retrieval and storage.
- Design MongoDB collections, implement indexing strategies, and optimize replica sets for performance and reliability.
- Scalability & Performance
- Implement horizontal and vertical scaling strategies to handle growing data and traffic.
- Optimize database performance through indexing, aggregation pipelines, and query tuning.
- External Integrations & Debugging
- Integrate third-party APIs (payment gateways, analytics tools, etc.) and SDKs seamlessly into backend systems.
- Debug and resolve complex issues in production environments with a systematic, data-driven approach.
AWS & Cloud Services
Work with AWS services like Lambda (serverless), SQS (message queuing), S3 (storage), and EC2 (compute) to build resilient and scalable solutions.
Collaboration & Best Practices
Collaborate with frontend teams to ensure smooth API integrations and data flow.
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Mandatory Requirements
3–5 years of professional experience in Node.js and MongoDB.
Expertise in:
- MongoDB: Collection design, indexing, aggregation pipelines, replica sets, and sharding.
- Node.js: Asynchronous programming, middleware, and API development (Express.js/Fastify).
- Query Optimization: Writing efficient queries for large datasets (crores of records).
- Strong debugging skills and experience in resolving production issues.
- Hands-on experience with external integrations (APIs, SDKs, webhooks).
- Knowledge of horizontal/vertical scaling techniques and performance tuning.
- Familiarity with AWS services (Lambda, SQS, S3, EC2).
Preferred Skills
- Experience with microservices architecture.
- Knowledge of CI/CD pipelines (GitLab CI, Jenkins).
- Understanding of Docker, Kubernetes, or serverless frameworks.
- Exposure to monitoring tools like Prometheus, Grafana, or New Relic.
Why Join Inncircles?
Solve large-scale data challenges in the construction domain.
Work on cutting-edge cloud-native backend systems.
Competitive salary, flexible work culture, and growth opportunities.
Apply Now:
If you’re passionate about building scalable backend systems and thrive in a data-heavy environment, share your resume and a GitHub/portfolio link showcasing projects with Node.js, MongoDB, and AWS integrations.
Inncircles – THE INNGINEERING COMPANY
📍 Hyderabad | 🚀 Building Tomorrow’s Tech Today

Looking for Java Developer for Gurugram and Bangalore Location with 5+ years of experience win Java + Microservices , Multithreading , Spring boot , Kafka and any MQ Series
skills needed:
java
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● Critical thinker and good problem-solver.
● Good time-management skills
● Great interpersonal skills
Working Timings: 3:00 pm to 12:00 am (midnight)IST
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-
Design and implement backend infrastructure and APIs.
-
Write high quality code that is robust, readable and scales.
-
Possess the drive to dive deep. thrive and progress even in ambiguous situations.
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Encourage and support knowledge sharing within teams and external groups.
-
Troubleshoot & debug applications.
-
Adopt problem solving as a way of life - always go to the root cause.
-
Collaborate with the team to discuss and implement ideas.
-
Build responsive, robust and optimised applications.
Requirements:
-
Passionate about building backend systems.
-
Desire to explore new ideas, open to other ideas as well.
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Love for writing clean, beautiful, readable and testable code.
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Experience in designing extensible DRY code.
-
Our stack is based on Django, Python3 Celery, Angular and Postgres.
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We expect you to have a good understanding of Python. It's even better if you are familiar with some of Git. Django, Celery, Redis and Unix Shell.
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