Fullstack 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

Unstop (Formerly Dare2Compete) is looking for Frontend and Full Stack Developers. Developer responsibilities include building our application from concept to completion from the bottom up, fashioning everything from the home page to site layout and function.

Requirements:-

• Write well-designed, testable, efficient code by using the best software development practices
• Integrate data from various back-end services and databases 
• Gather and refine specifications and requirements based on technical needs
• Be responsible for maintaining, expanding, and scaling our products
• Stay plugged into emerging technologies/industry trends and apply them into operations and activities
• End-to-end management and coding of all our products and services
• To make products modular, flexible, scalable and robust

Tech Skill:-

• Angular 10 or later
• PHP Laravel
• NodeJS
• MYSQL 8
• NoSQL DB
• Amazon AWS services – EC2, WAF, EBS, SNS, SES, Lambda, Fargate, etc.
• The whole ecosystem of AWS

Qualifications:-

• Freshers and Candidates with a maximum of 10 years of experience in the technologies that we work with
• Proven working experience in programming – Full Stack
• Top-notch programming and analytical skills
• Must know and have experience in AngularJS 2 onwards
• A solid understanding of how web applications work including security, session management, and best development practices
• Adequate knowledge of relational database systems, Object-Oriented Programming and web application development
• Ability to work and thrive in a fast-paced environment, learn rapidly and master diverse web technologies and techniques
• B.Tech in Computer Science or a related field or equivalent

Who are we?  

Whatfix is the #1 Digital Adoption Platform (DAP) for Enterprises. We are disrupting the way Learning, Training and Application Support content is consumed. We provide large enterprises with a SaaS platform that helps accelerate product adoption and reduce support & training efforts by providing contextual and step by step guidance inside any web application at the exact time a task is being performed. The product has redefined the way companies onboard, train, and provide support to users. 

What sets us apart from the rest?

With over 100 of the Fortune 500 companies already onboard as customers, Whatfix has been named among the top 20 B2B tech companies alongside the likes of Adobe, PayPal, and Cisco.

With a YoY growth of 300%, we have also been recognized among the top 50 fastest growing SaaS companies worldwide in the SaaS 1000 list and as a Market Leader by Gartner in the Digital Adoption space. 

We are pleased to have an Employee rating of 4.6 on Glassdoor and our Customer obsession can be seen in our reviews on platforms like G2 Crowd & Gartner Peer Insights.

The employees are happy, the customers are happy, but what about the investors? Take a look for yourself - Sequoia Capital || Stellaris || Cisco || Eight Roads || Helion Ventures

“Hustle Mode ON” is something we live by.

We are looking for a skilled Web Developer to join our growing team. As a Web Developer, you will be responsible for designing and developing responsive and dynamic web applications using PHP, HTML, CSS, JavaScript, and various front-end technologies.

Responsibilities:

• Design and develop dynamic and responsive web applications using PHP, HTML, CSS, JavaScript, and various front-end technologies.
• Work closely with cross-functional teams to define, design, and ship new features.
• Write clean, maintainable, and efficient code.
• Ensure the performance, quality, and responsiveness of web applications.
• Debug and troubleshoot issues, and fix bugs in a timely manner.
• Write unit tests to ensure code quality and stability.
• Use strong problem-solving skills to tackle complex technical challenges.
• Stay up-to-date with the latest industry trends and technologies.

Requirements:

• Bachelor's degree in Computer Science or a related field.
• 2 to 4 years of experience in full-stack web development.
• Strong knowledge of HTML, CSS, JavaScript, wordpress add PHP.
• Strong problem-solving and analytical skills.
• Ability to work in a fast-paced and dynamic environment.
• Excellent communication and interpersonal skills.
• Good to have AWS knowledge

We are an equal-opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

• Minimum 2 years experience on MEAN Stack
• Extensive hands-on experience in Node JS/Express/Hapi JS, Moleculer and NoSQL DBs (Mongodb and Redis are preferred)
• Strong coding and designing skills
• Working understanding of Continuous Integration and Continuous Deployment concepts and tools such as (Gitlab CI/CD), Development tools (Git), Application Servers (nginx, Apache)
• Experience in consuming and developing secure RESTful API/web-services
• Comfortable using Unix / Linux machines from command prompt
• As a full-stack architect in the team, you'll bring your ideas to life on a technology stack of Node JS and NoSQL Databases among others.
• We are looking for tech geeks who are hands-on and in love with building scalable, distributed and large web / mobile products.
• You must be an excellent problem solver with passion to self-learn and implement backend technologies
• You would be responsible for the architecture design, code review and technology build and deployment activities of web/mobile applications.
• Own the product development from scratch - Architect scalable, distributed and large scale web and mobile solutions from scratch
• You would be responsible for writing SRS and require strong technical writing and communication skills
• You would be responsible for managing and mentoring your team members and help them advance in their learning and career goals
• Ensure test driven development (TDD) methodologies are deployed to execute project
• Define and ensure right coding practices
• Code for fresh development and to troubleshoot and resolve issues
• Lead web development efforts, including hiring, mentoring and advising peers

•  Software Architecture and Design.

•  Development and Testing.

•  Deployments and Operations.

Roles & Responsibilities :

We are looking for Senior Software Developer (Elixir/ROR) who have past experience in Elixir or Erlang.

• Design and write with the cutting edge Elixir/ ROR language to improve the availability, scalability, latency, and efficiency of the company's range of products.
• Work with the engineering team to explore and create new design/architectures geared towards scale and performance.
• Participate in code and design reviews to maintain our high development standards.
• Engage in service capacity and demand planning, software performance analysis, tuning and optimization.
• Collaborate with product and experience teams to define and prototype feature specifications.
• Work closely with the infrastructure team in building and scaling back-end services as well as performing root cause analysis investigations.
• Design, build, analyze and fix large-scale distributed systems.

Qualifications :

We are looking for developers with 5+ years of experience of which 1-2 yrs of past work experience with ROR / Elixir or Erlang. In terms of Elixir we expect the following:

• You should be aware of idiomatic programming in Elixir, and should have good awareness of concepts such as pattern matching, recursion, and behaviors.
• You should be well versed with concurrency and processes in Elixir. 
• You should be hands on with Genservers, Tasks, Agents, Supervisors, and other OTP concepts in Elixir.
• Plus points if you have worked with data processing libraries such as Genstage, Flow and Broadway.
• 5+ years of overall software engineering experience.
• You should have good experience working with relational and non-relational databases. We use Postgres and Cassandra.
• Good to have but not mandatory working experience with caching tools such as Redis, Queue mechanism setup with RabbitMQ.
• Good knowledge of version management with Git.
• Awareness of TDD. 
• CI/CD knowledge would be a huge advantage.
• Will to design and maintain large scale distributed systems.
• Past experience in building complex applications, either by yourself, or as part of a larger team
• Desire (obsessive?) for maintainability.
• Experience of working with cross-functional remote teams in an Agile software development framework.
• Experience in designing APIs with proper documentation.
• Ability to write useful and maintainable tests.
• Good understanding of the common architectural patterns and design principles.
• Solid understanding of how modern web applications work.
• (Nice to have) Being an active member of the Elixir community (writing blog posts, giving presentations in meetups, etc).
• Strong written and verbal communications skills in English to engage a variety of large audiences, internally and externally.
• Strong analytical and reasoning skills.
• Bachelor’s Degree or equivalent in any relevant discipline.

• 6+ years of experience working with MongoDB or other NoSQL databases.
• Maintain and configure MongoDB (developer)
• Keep clear documentation of the database setup and architecture.
• Backup and Disaster Recovery management.
• Adept with all the best practices and design patterns in MongoDB for designing document schemas.
• Good grasp of MongoDB’s aggregation framework.
• Ensure that the databases achieve maximum performance and availability.
• Design indexing strategies.
• Configure, monitor, and deploy replica sets.
• Should have experience with MongoDB Atlas.
• Should have minimum experience with development and performance tuning.
• Create roles and users and set their permissions.
• Excellent written, verbal communication skills and critical thinking skills

• IIT/NIT Graduates Preferred
• B.E/B.Tech with 1-2 years of experience in Ruby on Rails
• Hands on experience with using libraries such as RSpec, Beanstalkd, Faye and   background processing.
• Good knowledge of at least one of the Javascript frameworks like EmberJS, AngularJS
• Have a background in functional composition of web pages using HTML / CSS, and  turning a wireframe design into a well-formatted, user-friendly responsive web page
• Follow best practices like test-driven development, continuous integration, Agile    methodology, refactoring and code standards
• Proficient understanding of code versioning tools e.g. Git, Mercurial or SVN
• Good knowledge of schema less databases such as Elastic search, redis as well as  Relational Databases such as PostgreSQL
• Excellent problem solving skills and bringing in new, innovative ideas to the table to  make the platform more productive
• Hands-on experience on deployment and maintenance of server (knowledge about AWS  and performance monitoring tools like NewRelic / CloudWatch will be a great plus)
• Should be committed to the job and the growth opportunity in a startup
• Should enjoy working as part of a team
• Should be  proactive, self-driven, and able to thrive in a fast-moving startup environment 
• Should communicate fluently and effectively in English, internally and with external partners