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11+ WebSocket Jobs in Kolkata | WebSocket Job openings in Kolkata

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Monjura Parveen
Monjura Parveen
Posted by Monjura Parveen
Kolkata
5 - 12 yrs
₹5L - ₹12L / yr
skill iconGo Programming (Golang)
skill iconNodeJS (Node.js)
skill iconJavascript
WebSocket
RESTful APIs
+5 more

Job Title: Golang Developer

Location: Kolkata

Job Type: Full-time

Working Days: 5 Days (Rotational off)

About the Role:

We are seeking a skilled Golang Developer with experience in Golang, Node.js, WebSocket

communication, and API development. In this role, you will work closely with our development

team to design, develop, and maintain high-performance backend systems and real-time

applications.

Key Responsibilities:

 Design, build, and maintain efficient, reusable, and reliable Golang code.

 Develop scalable APIs and microservices.

 Integrate and build real-time communication using WebSocket protocols.

 Collaborate with frontend developers and other team members to establish objectives

and design more functional, cohesive systems.

 Write clean, maintainable, and well-documented code.

 Optimize applications for maximum performance, scalability, and security.

 Participate in code reviews, contribute to team knowledge, and continuously improve

development processes.

 Troubleshoot, debug, and upgrade existing systems.

 Occasionally work with Node.js services and modules when needed.

Required Skills and Qualifications:

 Min 3+ years of experience in backend development with Golang.

 Solid understanding of Node.js and JavaScript/TypeScript.

 Hands-on experience with WebSocket integration and real-time applications.

 Strong knowledge of RESTful APIs, API design principles, and API documentation. Experience with relational and NoSQL databases (e.g., MySQL, PostgreSQL, MongoDB).

 Good understanding of concurrent programming and microservices architecture.

 Familiarity with cloud platforms (AWS, GCP, Azure) is a plus.

 Knowledge of containerization tools like Docker and Kubernetes is a plus.

 Strong problem-solving skills, attention to detail, and a proactive attitude.

Read more
NeoGenCode Technologies Pvt Ltd
Akshay Patil
Posted by Akshay Patil
Bengaluru (Bangalore), Pune, Hyderabad, Chennai, Kolkata
8 - 15 yrs
₹25L - ₹45L / yr
skill iconJava
skill iconSpring Boot
Microservices
skill iconLeadership
Team leadership
+11 more

Job Title : Lead Java Developer (Backend)

Experience Required : 8 to 15 Years

Open Positions : 5

Location : Any major metro city (Bengaluru, Pune, Chennai, Kolkata, Hyderabad)

Work Mode : Open to Remote / Hybrid / Onsite

Notice Period : Immediate Joiner/30 Days or Less


About the Role :

  • We are looking for experienced Lead Java Developers who bring not only strong backend development skills but also a product-oriented mindset and leadership capability.
  • This is an opportunity to be part of high-impact digital transformation initiatives that go beyond writing code—you’ll help shape future-ready platforms and drive meaningful change.
  • This role is embedded within a forward-thinking digital engineering team that thrives on co-innovation, lean delivery, and end-to-end ownership of platforms and products.


Key Responsibilities :

  • Design, develop, and implement scalable backend systems using Java and Spring Boot.
  • Collaborate with product managers, designers, and engineers to build intuitive and reliable digital products.
  • Advocate and implement engineering best practices : SOLID principles, OOP, clean code, CI/CD, TDD/BDD.
  • Lead Agile-based development cycles with a focus on speed, quality, and customer outcomes.
  • Guide and mentor team members, fostering technical excellence and ownership.
  • Utilize cloud platforms and DevOps tools to ensure performance and reliability of applications.

What We’re Looking For :

  • Proven experience in Java backend development (Spring Boot, Microservices).
  • 8+ Years of hands-on engineering experience with at least 2+ years in a Lead role.
  • Familiarity with cloud platforms such as AWS, Azure, or GCP.
  • Good understanding of containerization and orchestration tools like Docker and Kubernetes.
  • Exposure to DevOps and Infrastructure as Code practices.
  • Strong problem-solving skills and the ability to design solutions from first principles.
  • Prior experience in product-based or startup environments is a big plus.

Ideal Candidate Profile :

  • A tech enthusiast with a passion for clean code and scalable architecture.
  • Someone who thrives in collaborative, transparent, and feedback-driven environments.
  • A leader who takes ownership beyond individual deliverables to drive overall team and project success.

Interview Process

  1. Initial Technical Screening (via platform partner)
  2. Technical Interview with Engineering Team
  3. Client-facing Final Round

Additional Info :

  • Targeting profiles from product/startup backgrounds.
  • Strong preference for candidates with under 1 month of notice period.
  • Interviews will be fast-tracked for qualified profiles.
Read more
xAQUA India
Kolkata
5 - 20 yrs
₹13L - ₹25L / yr
FastAPI
API
skill iconFlask
Design patterns
pandas
+5 more

Senior Python Developer to lead the development of scalable, high-performance backend systems and data-driven applications. You will work on building robust services, APIs, and data workflows that power real-time and batch applications.This role is ideal for a seasoned developer who thrives on solving complex problems, building reliable software, and working across data and engineering teams. Youll play a key role in designing and developing Python-based systems that interface with big data frameworks, cloud platforms, and analytics tools.Key Responsibilities

  • Design and develop robust Python-based backend services and microservices.
  • Build RESTful APIs and integrations with third-party systems and internal tools.
  • Work with data workflows involving ingestion, transformation, and validation.
  • Develop and maintain ETL/ELT pipelines using Python, SQL, and Airflow.
  • Collaborate with DevOps teams to deploy, monitor, and scale applications in cloud environments (AWS, Azure, GCP).
  • Optimize code for performance, scalability, and maintainability.
  • Write unit and integration tests, participate in code reviews, and follow CI/CD best practices.
  • Work with cloud storage, databases, and data lake technologies like S3, Parquet, and DuckDB.
  • Collaborate with data scientists, analysts, and engineers to enable data access and modeling.


Required Skills & Qualifications

  • 5+ years of experience in backend software development, primarily in Python.
  • Strong understanding of OOP, modular design, and Python design patterns.
  • Experience with web frameworks (e.g., Flask, FastAPI, Django).
  • Hands-on experience with data processing tools like Pandas, SQLAlchemy, PyArrow.
  • Proficiency with SQL and database technologies (PostgreSQL, DuckDB, etc.).
  • Experience with Airflow for workflow orchestration.
  • Knowledge of building scalable, distributed applications and microservices.
  • Familiarity with cloud platforms (AWS, Azure, GCP) and containerization tools (Docker, Kubernetes).
  • Solid understanding of version control (Git), testing frameworks (PyTest), and CI/CD pipelines.
  • Excellent problem-solving, debugging, and communication skills.


Preferred Skills (Nice to Have)

  • Experience with data processing frameworks like Apache Spark or Vaex.
  • Familiarity with data storage formats and tools like Parquet, Iceberg.
  • Exposure to data streaming platforms (Kafka, Kinesis, Flink).
  • Experience integrating backend systems with AI/ML pipelines or BI platforms.
  • Understanding of security standards and compliance (GDPR, HIPAA, SOC2).
  • Background in metadata-driven or event-driven architectures.


Read more
Deqode

at Deqode

1 recruiter
purvisha Bhavsar
Posted by purvisha Bhavsar
Indore, Pune, Bhopal, Mumbai, Nagpur, Kolkata, Bengaluru (Bangalore), Chennai
4 - 6 yrs
₹4.5L - ₹18L / yr
skill iconJava
skill iconSpring Boot
Microservices
SQL

🚀 Hiring: Java Developer at Deqode

⭐ Experience: 4+ Years

📍 Location: Indore, Pune, Mumbai, Nagpur, Noida, Kolkata, Bangalore,Chennai

⭐ Work Mode:- Hybrid

⏱️ Notice Period: Immediate Joiners

(Only immediate joiners & candidates serving notice period)


Requirements

✅ Strong proficiency in Java (Java 8/11/17)

✅ Experience with Spring / Spring Boot

✅ Knowledge of REST APIs, Microservices architecture

✅ Familiarity with SQL/NoSQL databases

✅ Understanding of Git, CI/CD pipelines

✅ Problem-solving skills and attention to detail


Read more
GLOBAL DIGITAL TRANSFORMATION SOLUTIONS PROVIDER

GLOBAL DIGITAL TRANSFORMATION SOLUTIONS PROVIDER

Agency job
via Peak Hire Solutions by Dharati Thakkar
Thiruvananthapuram, Trivandrum, Bengaluru (Bangalore), Mumbai, Navi Mumbai, Ahmedabad, Chennai, Coimbatore, Gurugram, Hyderabad, Kochi (Cochin), Kolkata, Calcutta, Noida, Pune
8 - 12 yrs
₹20L - ₹40L / yr
skill icon.NET
Agile/Scrum
skill iconVue.js
Software Development
API
+21 more

Job Position: Lead II - Software Engineering

Domain: Information technology (IT)

Location: India - Thiruvananthapuram

Salary: Best in Industry

Job Positions: 1

Experience: 8 - 12 Years

Skills: .Net, Sql Azure, Rest Api, Vue.Js

Notice Period: Immediate – 30 Days


Job Summary:

We are looking for a highly skilled Senior .NET Developer with a minimum of 7 years of experience across the full software development lifecycle, including post-live support. The ideal candidate will have a strong background in .NET backend API development, Agile methodologies, and Cloud infrastructure (preferably Azure). You will play a key role in solution design, development, DevOps pipeline enhancement, and mentoring junior engineers.


Key Responsibilities:

  • Design, develop, and maintain scalable and secure .NET backend APIs.
  • Collaborate with product owners and stakeholders to understand requirements and translate them into technical solutions.
  • Lead and contribute to Agile software delivery processes (Scrum, Kanban).
  • Develop and improve CI/CD pipelines and support release cadence targets, using Infrastructure as Code tools (e.g., Terraform).
  • Provide post-live support, troubleshooting, and issue resolution as part of full lifecycle responsibilities.
  • Implement unit and integration testing to ensure code quality and system stability.
  • Work closely with DevOps and cloud engineering teams to manage deployments on Azure (Web Apps, Container Apps, Functions, SQL).
  • Contribute to front-end components when necessary, leveraging HTML, CSS, and JavaScript UI frameworks.
  • Mentor and coach engineers within a co-located or distributed team environment.
  • Maintain best practices in code versioning, testing, and documentation.


Mandatory Skills:

  • 7+ years of .NET development experience, including API design and development
  • Strong experience with Azure Cloud services, including:
  • Web/Container Apps
  • Azure Functions
  • Azure SQL Server
  • Solid understanding of Agile development methodologies (Scrum/Kanban)
  • Experience in CI/CD pipeline design and implementation
  • Proficient in Infrastructure as Code (IaC) – preferably Terraform
  • Strong knowledge of RESTful services and JSON-based APIs
  • Experience with unit and integration testing techniques
  • Source control using Git
  • Strong understanding of HTML, CSS, and cross-browser compatibility


Good-to-Have Skills:

  • Experience with Kubernetes and Docker
  • Knowledge of JavaScript UI frameworks, ideally Vue.js
  • Familiarity with JIRA and Agile project tracking tools
  • Exposure to Database as a Service (DBaaS) and Platform as a Service (PaaS) concepts
  • Experience mentoring or coaching junior developers
  • Strong problem-solving and communication skills
Read more
StyloPAY

at StyloPAY

4 recruiters
Shashikant Kumar
Posted by Shashikant Kumar
Kolkata
0 - 1 yrs
₹1.2L - ₹2.4L / yr
skill iconJava
J2EE
Struts
Spring
Hibernate (Java)
+5 more
Core Java, J2EE, Core Spring Framework and Spring boot skills
Knowledge of REST API, XML and RESTFUL web services
Working knowledge on SQL, JQuery, web services, Eclipse IDE would be a plus
Read more
Fintech leader on global transaction in banking

Fintech leader on global transaction in banking

Agency job
via The Hub by Sridevi Viswanathan
Kolkata, Mumbai, Pune, Hyderabad, Chennai, Nagpur, Aurangabad, Bhubaneswar, Indore, Visakhapatnam, Warangal, Coimbatore, Madurai, Lucknow, Gurugram
2 - 8 yrs
₹3L - ₹15L / yr
skill iconJava
skill iconSpring Boot
Microservices
JSP
RESTful APIs
+6 more

Who we are looking for

A candidate who can design, build and configure applications to meet business process and application requirements.

Key Role Requirements:

  • Experience in Java-J2EE Development
  • Hands-on experience in Struts (Core Java, JSP, Servlets, EJB) framework.
  • Hands-on experience in Oracle SQL, Procedures
  • Hands-on experience in Spring boot, Spring batch
  • Should have worked on application servers like IBM WAS / Jboss / Web logic.
  • Knowledge of basic Linux commands and BIRT reporting tool is an added advantage.
  • Knowledge in SVN or any other version control is an added advantage.
  • Knowledge in Build tool like ANT, Maven is an added advantage
  • Strong problem solving and analytical capabilities.
Read more
Nagarro Software

at Nagarro Software

1 video
12 recruiters
Nitika Kalra
Posted by Nitika Kalra
Remote, Mumbai, Delhi, Gurugram, Noida, Hyderabad, Chennai, Kolkata, Bengaluru (Bangalore), Pune
4 - 7 yrs
Best in industry
skill iconAmazon Web Services (AWS)
skill iconNodeJS (Node.js)
Microservices

👋🏼We're Nagarro.


We are a Digital Product Engineering company that is scaling in a big way! We build products, services, and experiences that inspire, excite, and delight. We work at scale across all devices and digital mediums, and our people exist everywhere in the world (19000+ experts across 33 countries, to be exact). Our work culture is dynamic and non-hierarchical. We are looking for great new colleagues. That is where you come in!


REQUIREMENTS:

  • Must have Skills: Node JS, Microservices architecture (MSA) (Capable),Javascript/Typescript, AWS S3/ LAMBDA/ EC2/DYNAMODB
  • Cloud developer with a minimum of 6 years of experience Technical skills in most of the following areas
  • Expert in developing REST Services and APIS using JavaScript, TypeScript NodeJS is a must 
  • Implementing Serverless Software development using Amazon Lambda written in NodeJS is desirable.
  • Services including AWS IoT, S3, RDS, IAM, Cognito, SNS, VPC, EBS, AWS Route 53, and Cloud Watch is a must
  • Proficient in database concepts including schema design, querying, performance tuning, and debugging (Both SQL and No-SQL databases)
  • Strong experience in designing and developing enterprise cloud-based IoT solutions using AWS
  • Develop Web, APIs, IoT & Cloud based solutions is a must
  • Ability to write automated unit test cases using mocking frameworks (Jasmine, Mocha, chai, Jest, etc.)
  • Experience in modern data architectures (e.g. Micro Service, event-driven architectures, stream processing, and integrating real-time analytics into customer applications is desirable
  • Have a good eye for NFRs (Scalability, extensibility, reliability, etc.) while evaluating design. should be able to Converts Solution Requirements into logical systems & subsystems
  • Innovates and creates new ideas and have the ability to develop quick proof of concepts and validate with the customer.


RESPONSIBILITIES:

  • Understanding functional requirements thoroughly and analysing the client’s needs in the context of the project
  • Envisioning the overall solution for defined functional and non-functional requirements, and being able to define technologies, patterns, and frameworks to realize it
  • Determining and implementing design methodologies and tool sets
  • Enabling application development by coordinating requirements, schedules, and activities.
  • Being able to lead/support UAT and production roll outs
  • Creating, understanding, and validating WBS and estimated effort for given module/task, and being able to justify it
  • Addressing issues promptly, responding positively to setbacks and challenges with a mindset of continuous improvement
  • Giving constructive feedback to the team members and setting clear expectations.
  • Helping the team in troubleshooting and resolving of complex bugs
  • Carrying out POCs to make sure that suggested design/technologies meet the requirements.
Read more
Crescentek
MIKA BHATTACHARJEE
Posted by MIKA BHATTACHARJEE
Kolkata
2 - 7 yrs
₹2L - ₹5L / yr
Wordpress
skill iconPHP
skill iconLaravel
skill iconCodeIgniter
skill iconJavascript
+2 more
Candidate must have the following skills:
1. Custom PHP development,
2. One framework like larval or CI
3. Solid Javascript & Jquery
4. Wordpress Plugin development
5. Custom Theme development
6. Advance Woocommerce knowledge
7. Elementor, Divi Page builder working experience
Read more
Klizo Solutions Pvt Ltd
Supriyo Mondal
Posted by Supriyo Mondal
Kolkata
1 - 6 yrs
₹2L - ₹8L / yr
skill iconLaravel
skill iconPHP
MySQL
skill iconCodeIgniter
skill iconMongoDB
+1 more

We are hiring IN OFFICE ONLY.

Office located in the beautiful Astra Towers in Rajarhat Kolkata.

We are looking for Senior Laravel Developers that have experience with Laravel Framework PHP, and VueJs.

 

You will be working right away with other senior Laravel Developers that know the products. You will be learning the projects, and helping them clean up and polish our tech better. We are a product based company.

 

 

A little about us:

Klizo Solutions has over 50 employees and is located in the New Town area, near CC2. Our employees range from graphic designers, back-end developers, iOS and Android Developers, and more. We are primarily a product-focused company. Our founder is from the USA and spends about 6 months a year here going back and forth. We develop technologies around his products and develop products for a few other clients. We are looking to expand to more locations, and are hiring for those reasons. You can see a company video here: https://klizos.com/about-us/

 

Preferred & Required knowledge and Duties:

  • MVC Structure
  • SQL concept
  • Eloquent Relationships
  • HTTP middleware
  • Basic knowledge of JQuery
  • Basic command of Laravel (How to create Model, Controller, migration, middleware )
  • Experience of Vue.js
  • Experience with Git
  • Experience integrating third-party APIs
  • Experience with payment APIs

 

Required Shifts:

We are expected to work Monday - Friday

We may rarely be needed on a Saturday if a project is required.

 

BONUS Knowledge (not required):

  • MongoDB
  • Worked with Jira
  • Knows Github / Repo / Source control
  • Worked with Bitbucket

 

Job Types: Full-time, Permanent, In Office

 

Benefits

  • Bonuses based on performance
  • Additional training will be available and may be required
  • Clean office, professional hardware, and a positive team.
Read more
Weblistr

at Weblistr

1 recruiter
Karthik Bhandary
Posted by Karthik Bhandary
Kolkata
1 - 4 yrs
₹3.6L - ₹0.0L / yr
skill iconPHP
MySQL
skill iconNodeJS (Node.js)
Weblistr is India's #1 Online Shopping Guide. With the mission to simplify the world of online shopping for users and help online companies connect better with their shoppers. Almost all products and services are available online today through a website or an app, but there is a lot of information gap. That's where we come in. Through our portal we help users discover, rate and review online companies.
Read more
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