302 Experienced Web App Full Stack Developer jobs in Kolkata

Job description

Backend Developer

Experience - 1-2years

Location – Kolkata
(Hybrid)

· Technical skills

Demonstrate
your proficiency with programming languages, databases, web servers, and
frameworks. You can also include experience with cloud computing, software
architecture, and API integrations. 

· Soft skills

Highlight
your ability to work well with others, solve problems, think critically, and
pay attention to detail. You can also mention your communication and
interpersonal skills, and your adaptability and flexibility. 

· Experience

Demonstrate
your experience with microservices architecture, cloud-based systems, and
containerization technologies. You can also mention your experience developing
web applications and working with agile methodologies. 

· Performance optimization

Show
how you optimize backend performance through caching strategies, query
optimization, and distributed computing. 

· Adaptability

Show
that you're quick to learn and integrate new tools, frameworks, and paradigms.

Skills – Python, PHP, Laravel

princy tiwari

Job Title: Backend Developer

Location: India, Remote

Position Type: Full-time

About Us:

Ankr Health is a multinational company with offices in San Francisco, Houston, and Bangalore. Our products are used by big pharma to deliver 24x7 support for cancer patients, and by doctors nationwide to deliver better care while improving the financial viability of their clinics. Backed by Y Combinator, Ankr is led by a team that has built successful companies before. Join us in creating transformative technologies that improve patient outcomes and revolutionize healthcare delivery.

Job Summary:

We are seeking a highly skilled Backend Developer with deep expertise in Python and Django (minimum 7 years of experience) to join our dynamic team. In this role, you will be instrumental in designing, developing, and maintaining robust and scalable backend solutions that power our innovative healthcare platform. You will collaborate closely with cross-functional teams to deliver high-quality software that meets the evolving needs of our users and contributes to Ankr Health’s mission of improving healthcare outcomes.

Key Responsibilities:

• Develop and maintain backend services and APIs using Python and Django.
• Design and implement scalable and efficient database schemas.
• Contribute to the design and development of new products and services across the development stack.
• Integrate third-party services and APIs.
• Write clean, modular, and well-documented code.
• Participate in code reviews and ensure code quality.
• Collaborate with cross-functional teams to gather and analyse requirements.
• Troubleshoot and resolve system performance issues and bugs.
• Stay current with the latest technologies and trends in backend development.

Required Skills and Experience:

• Bachelor’s Degree in Computer Science, Information Technology, or a related field.
• Minimum 7 years of hands-on experience in Django and Python backend development.
• Expertise in Docker and containerized deployments.
• Strong understanding of object-oriented programming principles.
• Proficiency with PostgreSQL and experience in database design and management.
• Basic understanding of front-end technologies (HTML, CSS, JavaScript).
• Excellent problem-solving and debugging skills.
• Strong communication and collaboration abilities.

Preferred Qualifications:

• Experience deploying solutions in production environments.
• Knowledge of cloud platforms such as AWS, Azure, or GCP.
• Exposure to healthcare IT standards such as HIPAA compliance is a plus.

What We Offer:

• Competitive salary
• Opportunities for career advancement and continuous learning
• A dynamic, inclusive work culture with global teams
• The chance to make a meaningful impact in healthcare technology

Does this role excite you? If so, we’d love to hear from you — apply now and help us transform healthcare for the better!

G10X: We have an exciting opportunity for Java Backend Developer

Exp: 8+yrs

Role: Java Backend developer

Location: Kochi/ Remote

Job Description:

• Strong proficiency in Java, Spring boot, micro services.

• Design, develop, and maintain high-quality applications using Springboot.

• Experience with developing RESTful APIs

• Knowledge of modern authorization mechanisms, such as JSON Web Token, In-memory caching

• Familiarity with modern build pipelines and tools like Jenkins

• A knack for benchmarking and optimization

• Good understanding in performance and security

• Release estimation, planning and timely integration with other stakeholders (product, app, backend, UI/UX etc.)

• A strong understanding of approaches and techniques to optimize API performance.

• Must have Experience in Azure cloud services like API Management, Key Vault, Azure DevOps & Azure based event driven architecture.

• Strong understanding of OOP Concepts, Data Structure and Design Patterns.

• Have knowledge of databases like MSSQL etc.

• Familiarity with code versioning tool such as Git

• Experience with Agile development and tools like Jira, Confluence

Interested, share your resume to

About Company:

Glowingbud is a rapidly growing eSIM services platform that simplifies connectivity with powerful APIs, robust B2B and B2C interfaces, and seamless integrations with Telna. Our platform enables global eSIM lifecycle management, user onboarding, secure payment systems, and scalable deployments. Recently acquired by Telna ( ), we are expanding our product offerings and team to meet increasing demand and innovation goals.

Key Responsibilities:

• API Development: Design, develop, optimize, and maintain high-performance RESTful APIs using Node.js and MongoDB.
• Scalability & Performance: Optimize backend performance for handling large data volumes and high-traffic production environments.
• Multi-Tenant SaaS: Develop and maintain multi-tenant architectures ensuring data policies, security, scalability, and efficiency.
• Microservices Architecture: Design and implement microservices-based solutions, ensuring modularity and maintainability.
• Database Management: Proficiently manage and optimize MongoDB, including indexing, aggregation, and performance tuning.
• System Engineering: Work with DevOps to ensure scalability, reliability, and security of backend systems.
• Product Development: Collaborate with product teams to build long-term, scalable backend solutions.
• Code Quality & Security: Write clean, maintainable, and secure code following industry best practices. Enforce coding standards, conduct detailed code reviews.
• Monitoring & Debugging: Implement logging, monitoring, and debugging tools to ensure system reliability.
• Collaboration: Work closely with frontend teams and DevOps to ensure seamless API integrations and deployments.

Qualifications:

• 7+ years of experience in backend development with Node.js and MongoDB.
• Strong understanding of microservices architecture and system design principles.
• Experience in building and maintaining multi-tenant SaaS applications.
• Proven experience handling large-scale data and high-traffic production systems.
• Proficiency in MongoDB, including schema design, indexing strategies, and performance optimization.
• Experience with event-driven architecture and messaging queues (e.g., AWS SQS, RabbitMQ, Kafka).
• Knowledge of authentication and authorization mechanisms (JWT, AWS Cognito, SSO).
• Strong experience with API development best practices, security, and rate limiting.
• Familiarity with containerization (Docker, Kubernetes) and CI/CD pipelines.
• Proficiency in cloud services (AWS, GCP, or Azure) for backend infrastructure.

Preferred Skills:

• Experience with Redis, ElasticSearch, or other caching mechanisms.
• Knowledge of serverless architectures and cloud-native development.
• Exposure to REST / gRPC for API communication.
• Understanding of data streaming and real-time processing.
• Experience with NoSQL and relational database hybrid architectures.
• Familiarity with observability tools (Prometheus, Grafana, ELK Stack).
• Experience in automated testing for backend systems.

Company Description

At Klypto , we’re redefining the way the world trades, invests, and grows wealth — blending the best of artificial intelligence, automation, and blockchain innovation .

If you’re passionate about pushing boundaries, building smart systems, and making a real-world impact, you’ll feel right at home here.

Klypto is India’s first AI-native intelligent automation platform , built from the ground up with adaptive machine learning and reinforcement-based logic—unlike conventional systems where AI is just bolted on. With a true AI-first architecture , Klypto enables autonomous execution, real-time learning, and self-optimization across complex workflows, making it ideal for industries like fintech, operations, logistics, and cyber intelligence .

Role Description

We are seeking a talented Backend Developer (Node.js) to join our engineering team. You’ll design, develop, and maintain high-performance backend systems and APIs for our AI-powered automation platform.

Responsibilities:

• Build and maintain scalable server-side applications using Node.js
• Design and implement RESTful or GraphQL APIs
• Work with SQL and NoSQL databases (MySQL, PostgreSQL, MongoDB, Redis)
• Integrate third-party APIs and services
• Ensure backend systems are secure, efficient, and optimized for performance
• Collaborate with frontend developers, data engineers, and AI specialists
• Write unit tests, debug, and maintain code quality
• Deploy and maintain backend services on cloud platforms (AWS/Azure/GCP)

Qualifications

• Bachelor’s degree in Computer Science, Engineering, or related field (or equivalent experience)
• 2+ years of backend development experience with Node.js
• Strong understanding of JavaScript/TypeScript
• Experience with frameworks like Express.js or NestJS
• Database design & query optimization skills
• Knowledge of authentication & authorization (JWT, OAuth 2.0)
• Familiarity with Docker , Kubernetes , and CI/CD tools is a plus
• Understanding of security best practices (OWASP Top 10)

Title: Senior Backend Engineer

Location: 100% Remote

Job Type: Fulltime

Job Description

• 10+ years of experience as a Backend Engineer with a focus on API work

• 7+ years of experience with SpringBoot and Java

• 2+ years of experience with Database SQL / Creating and Maintaining Store Procedures

• 2+ years of experience with GraphQL or NoSQL

• 2+ years of experience with Azure

• 1+ years of experience with Python

• Hands-on experience dealing and implementing with different types of API models (REST, SOAP, gRPC, etc) and their pros and cons

• Knowledgeable in the best practices in API contract testing and management

Thanks

Aatmesh

Company Description

TechBridge Consultancy Services is a leading provider of product and solutions in Network Monitoring, Cyber Security Applications, Collaboration, and Unified Communications. Our market-leading solutions in Network Modernization, Unified Communications, Mobility, and Embedded Communications empower customers to quickly capitalize on emerging market segments. We are experts in Government Solutions, Smart City Solutions, Data Centers, and Large Enterprises. TechBridge is ISO certified and committed to maintaining high standards.

Job Summary:

We are looking for a skilled PERN Developer with 2+ years of experience to design, develop, and maintain web applications using the PERN stack (PostgreSQL, Express.js, React.js, Node.js). In this role, you will be responsible for full-stack development, ensuring the delivery of high-quality, scalable, and efficient solutions. You will collaborate with cross-functional teams, troubleshoot complex issues, and adhere to best practices throughout the software development lifecycle.

Key Responsibilities:

• Design, develop, and maintain web applications using the PERN stack.
• Build scalable and efficient backend APIs and services using Node.js and Express.js.
• Develop interactive, responsive, and user-friendly frontends using React.js.
• Work with PostgreSQL to design database schemas, write queries, and ensure optimal database performance.
• Troubleshoot and debug application issues during development and post-production.
• Collaborate with product managers, UI/UX designers, and QA teams to deliver high-quality features.Conduct code reviews to ensure code quality and adherence to best practices.
• Stay updated with the latest trends in web development and contribute to improving team processes.
• Document technical specifications, system designs, and development workflows.

Skills and Qualifications:

• Bachelor’s degree in Computer Science, Engineering, or a related field.
• 2+ years of experience as a full-stack developer using the PERN stack or similar technologies.
• Proficient in JavaScript, with strong experience in React.js, Node.js, and Express.js.
• Strong understanding of relational databases, particularly PostgreSQL, and ability to write efficient queries.
• Familiarity with version control systems (e.g., Git) and deployment tools.
• Solid knowledge of RESTful API design and integration.
• Experience with Agile/Scrum development methodologies.
• Strong problem-solving skills and ability to work in a fast-paced environment.
• Excellent communication and teamwork skills.

Preferred Skills:

• Knowledge of cloud platforms (e.g., AWS, Azure, or Heroku) and CI/CD pipelines.
• Experience with containerization tools like Docker.
• Familiarity with testing frameworks and tools (e.g., Jest, Mocha)

Why Join Us?

• Work on cutting-edge technologies in a dynamic and supportive environment.
• Opportunities for professional growth and skill enhancement.
• Collaborative culture with a focus on innovation and excellence

Job Title: Senior Java Developer

Experience Level: Senior (5–10 years)

Location: Remote

Employment Type: Full-time

About the Role:

We are seeking a Senior Java Developer to design, build, and maintain high-performance, scalable, and secure applications. You will work as part of a cross-functional Agile team, contributing to all phases of the development lifecycle, mentoring junior developers, and delivering enterprise-grade solutions.

Key Responsibilities:

• Design, develop, and deploy scalable Java-based applications and microservices.
• Write clean, efficient, and well-documented code following best practices.
• Participate in system design, architecture discussions, and technical decision-making.
• Build RESTful APIs and integrate with third-party services.
• Collaborate with DevOps teams to implement CI/CD pipelines and cloud deployments.
• Conduct code reviews and provide mentorship to junior developers.
• Troubleshoot production issues and provide timely resolutions.
• Optimize performance, scalability, and security of backend systems.
• Work closely with product managers, QA, and other developers in Agile teams.

Required Skills and Qualifications:

• 5–10 years of experience in Java development , with strong hands-on expertise in:
• Java 8+ , Spring Framework (Spring Boot, Spring MVC, Spring Data)
• RESTful API development
• Microservices architecture
• Strong knowledge of Object-Oriented Programming (OOP) , design patterns , and SOLID principles .
• Experience with SQL and NoSQL databases (e.g., PostgreSQL, MySQL, MongoDB).
• Proficient in build tools like Maven or Gradle.
• Experience with unit testing frameworks (JUnit, TestNG, Mockito).
• Knowledge of CI/CD tools such as Jenkins, GitLab CI/CD, or GitHub Actions.
• Familiarity with version control systems (Git) and Agile/Scrum methodologies .
• Strong analytical, problem-solving, and debugging skills.
• Excellent communication and collaboration abilities.

1. Good experience with Golang development and bug fixing (5 years+)
2. Working experience with Graphql.
3. Working experience with Azure cloud, Google Cloud Platform.
4. Working experience with Azure Citus DB creation and maintenance.
5. Working experience with Azure Kubernetes, and deploying the application in Kubernetes.
6. Working experience with Python
7. Working experience with Nginx server and issue solving.
8. ETL understanding is highly needed.
9. Experience with Monitoring tools.
10. Management of deployments and Kubernetes cluster resources
11. Understanding of the Agile Software Development Life Cycle and been exposed to Scrum projects