MERN Stack Developer

We’re building a powerful, AI-driven communication platform — a next-generation alternative to RingCentral or 8x8 — powered by OpenAI, LangChain, and SIP/WebRTC. We're looking for a Full-Stack Software Developer who’s passionate about building real-time, AI-enabled voice infrastructure and who’s excited to work in a fast-moving, founder-led environment.

This is an opportunity to build from scratch, take ownership of core systems, and innovate on the edge of VoIP + AI.

What You’ll Do

• Design and build AI-driven voice and messaging features (e.g. smart IVRs, call transcription, virtual agents)
• Develop backend services using Python, Node.js, or Golang
• Integrate OpenAI, Whisper, and LangChain with real-time VoIP systems like Twilio, SIP, or WebRTC
• Create scalable APIs, handle call logic, and build AI pipelines
• Collaborate with the founder and early team on product strategy and infrastructure
• Participate in occasional in-person strategy meetings (Delhi, Bangalore, or nearby)

Must-Have Skills

• Strong programming experience in Python, Node.js, or Go
• Hands-on experience with VoIP/SIP, WebRTC, or tools like Twilio, Asterisk, Plivo
• Experience integrating with LLM APIs, OpenAI, or speech-to-text models
• Solid understanding of backend design, Docker, Redis, PostgreSQL
• Ability to work independently and deliver production-grade code

Nice to Have

• Familiarity with LangChain or agent-based AI systems
• Knowledge of call routing logic, STUN/TURN, or media servers (e.g. FreeSWITCH)
• Interest in building scalable cloud-first SaaS products

Work Setup

• 🏠 Remote work (India-based, must be reachable for meetings)
• 🕐 Full-time role
• 💼 Direct collaboration with founder (technical)
• 🧘‍♂️ Flexible hours, strong ownership culture

Skill Set: 10 years plus as a full stack Java/JavaScript Developer

Micro Services, Distributed Systems

Cloud Services: AWS:(EC2,S3,Lambda,Load Balancing,Serverless)

Programming Backend: Node.js ,

Programming FrontEnd: React.js or ,Angular

Queuing: RabbitMQ /Kafka

Methodologies: Agile Scrum

Responsibilities:

End to end coding ; from software architecture to managing scaling,of high throughput(100000)RPS high volume transactions.

DIscuss business requirements and timelines with management and create a task plan for junior members.

Manage the day to day activities of all team members and report their work progress

Mentoring the team on best coding practices and making sure modules are Live

on time.

Management of security vulnerabilities.

Be a full individual contributor which means can work in a team as well as alone.

Attitude:

Passion for tech innovation and solve problems

GoGetter Attitude

Extremely humble and polite

Experience in Product companies and Managing small teams is a plus

mavQ is seeking a motivated Lead FullStack Developer to join our team. You will be an integral member of the Professional Services team dedicated to work on the recently acquired mavQ’s Electronic Research Administration products built on a REST based Java platform running in Tomcat. The work is about 70% implementation and new development and 30% maintenance.

Skills Required:

• At least 7 years of experience with Frontend and Backend Technologies.
• Experience in Java, Spring, API Integration, Angular, Frontend Development.
• Ability to work with caching systems such as Redis.
• Good understanding of cloud computing & Distributed systems.
• Experience in people management.
• Capability of working within a budget of hours and completing projects by a deadline to appropriate quality standards
• Communicate clearly and ask clarification questions, dig deeper.
• Ability to work from visual and functional specifications
• Work with a positive attitude even when circumstances may be unfavorable
• Understand RESTful APIs, MVC concepts, and how to effectively use SVC systems
• Ability to work effectively in a team of developers and representatives of other functional groups, such as design
• ​​Good Experience in CI/CD, Kubernetes, Test suits, Docker.
• Good Understanding of the Command line.
• Good with client Interaction.

Roles & Responsibilities:

• Effective Problem Solving Skills. Assist the team with debugging & guidance when needed.
• Responsible for managing a team of 8-10 developers.
• Lead the product’s technical domain with full authority.
• Assist the product & project management teams with setting timelines & priorities for feature development.
• Drive good coding standards & development practices in the team. 
• Own the code review process for the team & ensure high quality work.
• Assist with system & architecture design & research into new technologies.
• Be involved with client communications when needed from a product sales perspective. 

What we offer:

• Group Medical Insurance (Family Floater Plan - Self + Spouse + 2 Dependent Children)
• Sum Insured: INR 5,00,000/- 
• Maternity cover upto two children
• Inclusive of COVID-19 Coverage
• Cashless & Reimbursement facility
• Access to free online doctor consultation

• Personal Accident Policy (Disability Insurance) -

• Sum Insured: INR. 25,00,000/- Per Employee
• Accidental Death and Permanent Total Disability is covered up to 100% of Sum Insured
• Permanent Partial Disability is covered as per the scale of benefits decided by the Insurer
• Temporary Total Disability is covered

• An option of Paytm Food Wallet (up to Rs. 2500) as a tax saver  benefit
• Monthly Internet Reimbursement of upto Rs. 1,000 
• Opportunity to pursue Executive Programs/ courses at top universities globally
• Professional Development opportunities through various MTX sponsored certifications on multiple technology stacks including Salesforce, Google Cloud, Amazon & others

***

Are you an experienced full-stack developer with a passion for PHP and CMS? Are you looking for a new challenge in Kolkata? If so, we have the perfect opportunity for you!

Our company is seeking a highly skilled and motivated full-stack backend developer to join our team in Kolkata. As a backend developer, you will be responsible for developing and maintaining different client's web applications, ensuring their performance, security, and scalability.

Requirements:

• Minimum of 5 years of experience in PHP development and CMS(WP, Shopify, Webflow)
• Experience with Laravel, Symfony, or CodeIgniter frameworks
• Proficiency in MySQL, PostgreSQL, or other relational databases
• Experience with front-end technologies such as HTML, CSS, and JavaScript
• Familiarity with server administration and hosting environments
• Excellent problem-solving skills and ability to work in a team environment
• Good communication skills in English
• 
  

Responsibilities:

• Develop, test, and maintain our web applications using PHP and CMS frameworks
• Collaborate with the team to design and implement new features and enhancements
• Troubleshoot and debug any issues that arise with the applications
• Ensure the performance, security, and scalability of the applications
• Collaborate with front-end developers to integrate user-facing elements with server-side logic
• Create and maintain database schemas that represent and support business processes
• 
  

Education and Experience:

• Bachelor's degree in Computer Science or a related field
• Minimum of 5 years of experience in PHP and CMS development
• 
  

Location:

The position is based in Kolkata, and the candidate must be able to work from our office.

We offer a competitive salary package, based on the candidate's experience and skill set. If you are passionate about PHP and CMS development and are looking for a challenging new opportunity in Kolkata, we encourage you to apply for this position. We look forward to hearing from you!

JOB DESCRIPTION

Job Summary
We are looking for a PHP Developer responsible for managing back-end services and the interchange of data between the server and the users. Your primary focus will be the development of all server-side logic, definition and maintenance of the central database, and ensuring high performance and responsiveness to requests from the front-end. You will also be responsible for 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.

• Minimum experience should be 5 years.
• Strong knowledge of PHP frameworks (such as OpenCart, Zend)
• Advance understanding of front-end technologies, such as JavaScript & JS based frameworks like jquery.

• Understanding of MVC design patterns.

• Good hands on in integrating payment API's and CRM software development.

• Preference for experience on rest API's.

• Proficient understanding of code versioning tools, such as Git.

• At least 2+ years of product development experience with expertise in designing and implementing high-performance java enterprise applications
• Extensive knowledge in Object-Oriented Programming and Design
• Extensive knowledge of Java, Spring, Spring MVC, Spring Boot, Hibernate, Struts
• Exposure to or experience with Git, Bitbucket, Jira, Jenkins etc.
• Experience with HTML/XHTML, CSS, Javascript, AJAX, DOM, Reactjs
• Extensive knowledge in creating and consuming RESTful API
• Extensive knowledge in automated unit testing using JUnit
• Experience in AWS infrastructure
• Knowledge in writing SQL queries and interacting with database systems such as Oracle, SQL Server,
• Thorough orientation towards Code reviews, Coding standards, Design Standards, and Code Documentation
• Knowledge in design patterns
• Knowledge of Data modeling in RDBMS or NoSQL databases
• A proactive approach to identify alternatives for a given problem statement
• Should have worked on enterprise-class applications
• Should have worked in an Agile environment
• Excellent oral and written communication skills