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WebSocket Jobs in Kolkata

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
Fintech leader on global transaction in banking

Fintech leader on global transaction in banking

Agency job
via The Hub by Sridevi Viswanathan
Kolkata, Mumbai, Hyderabad, Pune
2 - 8 yrs
₹9L - ₹15L / yr
skill iconJava
skill iconSpring Boot
RESTful APIs

Key Responsibilities:

  • Development of a Single Page Application (SPA) and it's components in Typescript: deployed and optimized for progressive mobile and browsers using Angular 2 and Ionic 2 frameworks.
  • Creating custom, general use modules and smart components which extend the elements and modules of core Angular framework.
  • Creating self-contained, reusable, and testable modules and components in Typescript and using responsive HTML and CSS.
  • Architecting and automating the build process for production, using task runners or scripts.
  • Writing non-blocking code, and resorting to advanced techniques such as multi-threading, when needed

Skills and Qualifications:

  • Should have experience with CSS 3, SCSS, Java script and HTML5.
  • Full-time knowledge of Angular practices and commonly used modules based on extensive work experience. Or 2 Year or more experience with other industry-leading frameworks like React.
  • Minimum 1-year experience in working and extending one of the CSS or UI frameworks like Ng-lightening, Angular-material

Education:

  • BE / BTech / MCA
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 iconNodeJS (Node.js)
skill iconJavascript
es6
MySQL
RabbitMQ
+2 more

👋🏼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:

  • Experience: 4.1-7 years
  • Must have Skills: JavaScript ES6, MySQL, RabbitMQ, Redis, Node JS
  • Strong technical background with node.js, event loop understanding, unit testing, developing web application & APIs, event & stream, call-back & closures, promise, async/await, accessing file system, Optimization techniques.
  • Strong experience in JavaScript, Express.js, GraphQL
  • Strong knowledge of REST, microservices, cloud development and design patterns
  • Comfortable using modern tools and platforms such as Docker, Jenkins, Gitlab CI, etc.
  • Comfortable using agile methodologies.
  • Understanding of different components such as web server, storages, integrations
  • Should have worked on designing and building server-side solutions (in any technology), build process of node.js, CI/CD process of node.js, multi-tasking (working on multiple things at same time)
  • Good knowledge of functional and Object-Oriented Programming
  • Implementing effective security protocols, data protection measures, and storage solutions.
  • Running diagnostic tests, repairing defects, and providing technical support.
  • Recommending and implementing improvements to processes and technologies.
  • Keeping informed of advancements in the field of Node.js development.
  • Familiarity with Azure pipeline
  • Should have experience in Identifying software application weaknesses and target areas and sketching out ideas for automated software test procedures. Reviewing software bug reports and highlighting problem areas.
  • Knowledge of high-quality professional software engineering practices for agile software development cycle, including coding standards, code reviews, source control management, build processes, testing, and deployment.
  • Fundamental knowledge of design patterns
  • Experience in communicating effectively with users, other technical teams, and management to collect requirements, describe software product features, and technical designs.
  • Mentoring the team members to meet the client's needs and holding them accountable for high standards of delivery.
  • Being able to understand and relate technology integration scenarios and be able to apply these learnings in complex troubleshooting scenarios.


RESPONSIBILITIES:

  • Writing and reviewing great quality code
  • 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
  • Coming up with solutions to any issue that is raised during code/design review and being able to justify the decision taken.
  • Carrying out POCs to make sure that suggested design/technologies meet the requirements.
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
magicmind technologies
Mousumi Dutta
Posted by Mousumi Dutta
Kolkata
7 - 12 yrs
₹10L - ₹18L / yr
skill iconJava
J2EE
skill iconSpring Boot
Hibernate (Java)
Microservices

We are looking for an experienced Lead Java Developer to join our team and take a leadership role in driving the design, development, and delivery of highquality software solutions. A Senior Java Lead Developer will be responsible for leading a team of developers, providing technical guidance, and ensuring the successful execution of projects. Should have a strong background in Java development, excellent leadership skills, and a track record of delivering complex software projects on time. System Architect: Should have Architect the system before for a large scale solution Understanding of various java design pattern and use the pattern which is more appropriate Understanding of various micro-service design pattern and use the pattern which is more appropriate Has worked on DDD with CQRS Has designed solution for multi tenant application. Technical skills: Used latest version of java and good understanding of it Skilled in spring boot, spring MVC Basic Skill: 10+ years of experience in development. Good communication skills in English. Testing: Skilled in using Junit Security: Good understanding of application security Understanding of DDOS and best practice for that Good understanding of rate limiting API Good understanding about spring security or any thing better Database: Great understanding of MySQL Experience in extensively using hibernate Debugging: Understanding about Logging Skilled in debugging production issue

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
Mihup Communications Private Limited
Remote, Kolkata
3 - 5 yrs
₹12L - ₹24L / yr
skill iconJava
J2EE
skill iconSpring Boot
Hibernate (Java)
AWS CloudFormation
+5 more
Responsibilities (what the job involves)
• Architect, develop and maintain highly scalable, reliable and secure distributed backend
systems on Cloud (AWS or Azure) or on-premises environments for Mihup, its customers
and partners.
• Work closely with your fellow engineers to develop systems capable of concurrently
processing massive amounts of voice data both in online real-time as well as offline
environments.
• Drive accountability for test driven development, delivery of high-quality features and
resilient enterprise class solutions.
• Lead a culture of team ownership and direct individual and team accountability to
continuously improve how they work to achieve results.
• Work in a startup environment, pushing boundaries with deep involvement with business.
Requirements (what we are looking for)
The right person is better than the right set of experiences and these are the traits we’ve
identified make great additions to our team.
• BE//BTech/ME/MTech in Computer Science or a related field from a Tier I or Tier II
University.
• 6-8 years of hands-on software development and deployment experience (experience of
working in a consumer product startup during its growth phase will be a plus) of which 1
– 2 years of experience would be in leading a team of software developers.
• Expertise in Java 8+ and Spring Boot is a must
• Good experience in messaging platforms like RabbitMQ/Kafka
• Good experience in distributed systems and relational & NoSQL databases like
PostgreSQL, MySQL, Redis, MongoDB, etc.
• Expertise in one or more of: Java, NodeJS, GoLang, Python would be preferred
• Must have hands on experience in products which handle multiple concurrent calls (API),
handle CPU intensive jobs, consist of multiple asynchronous system calls.
• Worked on microservices based architecture and design
• Managed/ Owned infrastructure on AWS/Microsoft Azure/private clouds and setup high
availability systems
• Knowledge of Docker and Kubernetes
• Knowledge of RESTful APIs, caching concepts, the HTTP protocol and general web
architecture
Pluses
1. Anything that will let us know more about who you are that you would like to share such
as Blogs, Twitter, Medium, GitHub etc.
Read more
Alien Brains

at Alien Brains

5 recruiters
Praveen Baheti
Posted by Praveen Baheti
Kolkata
1 - 4 yrs
₹3L - ₹8L / yr
skill iconJavascript
skill iconPython
skill iconRuby on Rails (ROR)
skill iconNodeJS (Node.js)
NOSQL Databases
+3 more
Alien Brains is a research lab where we guide students on how to go about different fields in Computer Science, if they are to make career in it. We are also developing some products related to the above problem statement and thus need developers who can match with our vision, work alongside us on the products, and also on the same time guide the youngsters in colleges.
Read more
B2B Software Services Co

B2B Software Services Co

Agency job
via Unnati by Deepa B S
Kolkata, NCR (Delhi | Gurgaon | Noida)
2 - 6 yrs
₹3.5L - ₹7L / yr
skill iconLaravel
skill iconJavascript
skill iconHTML/CSS
skill iconGit
SVN
+9 more
If you want to lay a strong foundation to your career with a fast growing and the most robust IT company, then here is your chance. Come work with us.

Our client is a decade-old software development company, that offers its clients a wide range of customized web, mobile, and eCommerce tools and software. They are known to use advanced languages and platforms used to build reliable, secure, and scalable solutions for their business clients as well as individual customers. Their disruptive craftsmanship and strategy help in high-performance growth and allows customers to transform digitally and competitively.

Their products are being used by most of the banks and NBFCs in India, apart from clients from other industries. The founder is an IIM and MDI alumni and has experience of more than 13 years in business and strategic roles in MNCs. The company has been accredited by the government as a premier IT company, committed to quality and driven by customer success.

 

As a Laravel Developer, you will be responsible for designing and managing the website back-end including database and server integration.
 
What you will do:
  • Understanding and implementing security and data protection
  • Managing both front-end and back-end web development requirements from a consumer.
  • Taking full responsibility for task/ project execution
  • Handling Payment Gateway integration and ecommerce development concepts
  • Prioritizing own work and respect deadlines

 

 

What you need to have:

  • Excellent skills in PHP Laravel
  • Strong object-oriented programming skills
  • General knowledge of both front-end and back-end web development from a consumer.
  • Databases (more than one is desirable) MySQL, PostGRE, MongoDB
  • Experience in Payment Gateway integration and ecommerce development concepts
  • Should know about child theme and its structure.
  • Proficient in CSS3/ HTML5
  • Should know about source version control like git or svn etc.
  • Familiar with AWS & Linux command line will be added advantage.
  • Must be a team player with good communications
  • Ability to solve problems quickly and efficiently
  • Great aptitude and attitude towards learning
  • Ability to prioritize own work and respect deadlines

 

Read more
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