Ruby on Rails Developer

Project Overview

We’re building Express AI, a SaaS platform that allows small and medium-sized businesses (SMBs) to easily train and deploy their own dedicated AI agents for customer service, technical support, sales, and more.

Our vision is to give SMBs the power of enterprise-grade AI without complexity. You’ll help build the core platform that powers this – including agent training interfaces, web deployment, dashboards, and integrations.

Key Responsibilities

• Develop scalable full-stack features using modern JavaScript frameworks

• Build and maintain AI agent training modules (upload docs, FAQs, tone settings)

• Integrate OpenAI, Whisper, LangChain, and other LLM APIs

• Implement user-facing dashboards for chat/voices/social/email agent monitoring

• Design multi-tenant systems with admin-level controls

• Ensure reliability and scalability of the platform as we grow

Tech Stack

• Frontend: React.js, Next.js, TypeScript

• Backend: Node.js, Express, MongoDB (or Postgres), Redis

• AI & NLP: OpenAI API (ChatGPT, Whisper), LangChain, Python (optional)

• DevOps: Docker, AWS or GCP (basic familiarity okay)

• Other: WebSockets for real-time chat, REST APIs, Git

Role Type

• Full Stack Developer (preferred)

• Frontend or Backend specialists also considered, but must be willing to collaborate on both sides

Experience Level

• 3 to 6 years of professional experience

• Previous work with SaaS platforms, AI tools, or multi-tenant architecture is a big plus

Must-Have Skills

• Proficiency in JavaScript/TypeScript

• Strong experience with React.js and Node.js

• Experience working with REST APIs and building secure web apps

• Solid understanding of cloud deployment (AWS/GCP/Firebase)

• Ability to work independently, self-manage, and deliver in a fast-paced environment

Nice-to-Have Skills

• Familiarity with LangChain, OpenAI, AI agent frameworks

• Experience with voice/chat integration

• Prior experience building tools for SMBs or customer support systems

Engagement Type

• Full-time (preferred) or part-time with clear weekly availability

• Remote (India-based candidates only)

Why Join Us?

• Work on a cutting-edge AI platform solving real problems for real businesses

• Fast-moving, no-red-tape team environment

• Build something that will impact millions of small businesses globally

We are looking for a highly skilled MERN Stack Developer who is passionate about building seamless user interfaces and robust backend systems. The ideal candidate will have strong expertise in ReactJS for UI development and hands-on experience in Node.js API development. You will play a crucial role in developing and maintaining scalable web applications using the MERN (MongoDB, Express.js, React.js, Node.js) stack.

Responsibilities:

• Frontend Development:
• Build responsive and dynamic user interfaces using ReactJS.
• Develop reusable components, UI libraries, and ensure excellent user experience.
• Optimize applications for maximum speed and scalability.
• Work with tools like Redux, React Hooks, and other state management libraries.
• Backend Development:
• Design and develop RESTful APIs using Node.js and Express.js.
• Build secure, scalable, and efficient server-side applications.
• Integrate third-party APIs and services when required.
• Database Management:
• Work with MongoDB to design and manage collections, queries, and indexes.
• Ensure smooth integration of database operations with the backend.
• Collaboration:
• Work closely with designers, project managers, and other developers to define project requirements and deliverables.
• Conduct code reviews and ensure clean, maintainable, and testable code.
• Testing and Deployment:
• Write unit tests and integration tests for both frontend and backend components.
• Deploy applications to cloud environments (AWS, GCP, or similar platforms).
• 
  

Skills and Qualifications:

• Strong proficiency in ReactJS:
• Experience in creating dynamic and responsive UI components.
• Knowledge of modern React features such as Hooks, Context API, and functional components.
• Hands-on Node.js API Development:
• Strong experience in Express.js to build RESTful APIs.
• Understanding of asynchronous programming and event-driven architecture.
• Good knowledge of MongoDB:
• Hands-on experience with designing collections, writing queries, and data modeling.
• Proficient in JavaScript and ES6+:
• Strong understanding of modern JavaScript, including DOM manipulation.
• Familiarity with:
• State Management Libraries (e.g., Redux, MobX).
• Version Control (Git and GitHub).
• Frontend Tools like Webpack, Babel, and NPM/Yarn.
• API Integrations and tools like Postman or Swagger for testing APIs.
• Strong understanding of UI/UX design principles:
• Ability to work with design tools (e.g., Figma, Sketch, or Adobe XD) to bring designs to life.
• Problem-solving mindset and ability to write clean, efficient, and maintainable code.

Nice-to-Have Skills:

• Experience with TypeScript.
• Knowledge of GraphQL.
• Experience with containerization tools like Docker.
• Familiarity with deployment tools (CI/CD pipelines).

Experience:

• 0-2 years of experience as a MERN Stack Developer or relevant roles.

Benefits:

• Competitive salary based on experience.
• Opportunity to work on exciting and impactful projects.
• Collaborative and dynamic work environment.
• Career growth and learning opportunities.

We are looking for a talented and motivated Full Stack Developer to join our development team in India who will be responsible for designing, developing, testing and debugging responsive web and mobile applications for the company. Using Ruby on Rails, JavaScript, JQuery, HTML, CSS, Bootstrap and Coffee Script, this candidate will be able to translate user and business needs into functional design.

Responsibilities

• Design, build, and maintain efficient, reusable, and reliable Ruby code
• Integration of data storage solutions (may include databases, key-value stores, blob stores, etc.)
• Integration of user-facing elements developed by front-end developers with server side logic
• Identify bottlenecks and bugs, and devise solutions to these problems
• Help maintain code quality, organization and automatization

• Experience with Ruby on Rails, along with other common libraries such as RSpec and
• Solid understanding of object-oriented programming
• Good understanding of server-side CSS preprocessors (such as Sass, based on project requirements)
• Basic understanding of front-end technologies, such as JavaScript, HTML5, and CSS3
• Familiarity with concepts of MVC, Mocking, ORM, and RESTful
• A knack for writing clean, readable Ruby code
• Ability to integrate multiple data sources and databases into one system
• Understanding of fundamental design principles behind a scalable application
• Able to create database schemas that represent and support business processes
• Able to implement automated testing platforms and unit tests
• Proficient understanding of code versioning tools (e.g. Git, Mercurial or SVN)
• Familiarity with development aiding tools (such as Bower, Bundler, Rake, etc)
• Familiarity with continuous integration
• Familarity with Heroku

Required skillset
Experience in backend and frontend tech stack and deployment is mandatory.
Excellent programming skills in Golang/Python/Java, JS/Dart/Swift and HTML/CSS.
Proficient in Web architecture and cloud integration concepts.
Experience with NoSQL database is preferred.
Good to have hands-on experience with GCP/AWS/Azure.
Qualification: Bachelors/Masters Computer Science or related domain.
Knowledge of DevOps tools and CI/CD practices are strong additions

Responsibilities
Help to architect Concepts/MVP with minimal supervision.
Work on the full spectrum of technology stack - backend & frontend.
Explore the feasibility of running video analytics on Edge (App/Browser)
Work with the Analytics team for creating various visualization options

The ideal candidate will be responsible for developing high-quality applications. They will also be responsible for designing and implementing testable and scalable code.

Responsibilities

• Develop quality software and web applications
• Analyze and maintain existing software applications
• Design highly scalable, testable code
• Discover and fix programming bugs

Qualifications

• Bachelor's degree or equivalent experience in Computer Science or related field
• Development experience with programming languages Python, Javascript, NodeJS
• At least 2-3 years of experience in Python and React
• SQL database or relational database skills
• Strong understanding of the software development cycle
• Self-motivation and the ability to work under minimal supervision are a must
• Excellent oral and written communication skills to interact with all levels in the organization

Full Stack Python Engineer at Silicon Valley AI Startup

Role & Responsibilities

• A Proven work experience as a Ruby on Rails developer with good understanding of Java script, jQuery, HTML, CSS. The individual will need to be hands on with development, performance optimisation, secure development process, usability, and coding standards of the product.
• Strong ROR development experience and follows best practices (test-driven development, continuous integration, SCRUM, refactoring, and code standards).
• Should have a mix of excellent reasoning ability to document, develop and test software with the commitment to excellence and defect free product before being deployed.
• Should be able to work closely with all stakeholders to investigate, fix, optimise, test, and deploy high quality solutions.
• Should have hands on understanding of technical design, implementation, and maintenance of technical initiatives towards improving and scaling of products.
• Self-motivated and should rapidly incorporate new requirements and deliver successfully by self.
• Effectively communicates with peers and stakeholders, gathers and clarify requirements from technical & functional aspect.

• Follows software development process; consistently innovates processes to improve individual and team productivity and quality.
• Strong Analytical, Problem Solving Skills and participates in all activities with urgency, should be result oriented and with strong work ethic.
• Experience with Agile development lifecycle with excellent understanding of feature estimation and ability to communicate issues and risks that may impact timelines or resources.

Desired Candidate Profile

• 4+ years of IT experience.
• At least 4 years commercial web development experience.
• At least 3 years of Ruby on Rails commercial development experience.
• Familiarity with Relational and Non Relation Databases ( Postgres, Mysql, MongoDb)
• REST API development.
• Familiarity with In Memory Database ( Redis, Memcache )
• Web development - HTML, HTML5 JavaScript, AJAX, CSS, jQuery, http, REST.
• AGILE/SCRUM development Experience.
• Development practices - Rails test framework / TDD / BDD, Domain Driven Design, SOLID, refactoring, OOP design patterns
• Expertise in version control system ( GIT )
• Candidate need to be comfortable dabbling with some basic infrastructure management on AWS.
• Familiarity with ( React, Vue ) is a plus.

Level 3 Contractor-to-Fulltime-Programmer Role:

Must have 1-2 years (ideally 12 to 30 months) of post-collegiate professional programming experience at a top SaaS company in React, Typescript, Javascript working within Visual Studio Code and Yarn, leveraging superior techniques with Routing, Components, State, and Props to deliver elegant consumer applications based on dynamic data.

Ability to translate user story completely into exceptional functionality that consistently meets acceptance criteria and delights users.  Ability to convert complex workflows into elegant experiences highly prized.

Experience with Firebase, Firestore, MongoDB, Heroku and other Cloud-based technologies to deliver scalable, performant data-driven applications, with deployments on Kubernetes.  Ideally experienced working with colleagues over Discord.

Ability to exhibit judgment to independently author test suite and testing scripts to evaluate code additions, ensuring no regressions in functionality or user experience.

Proficiency in translating complex mathematical concepts into effective data structures and programming practices.  Personal pleasure in solving mathematical puzzles elegantly is a huge plus.

Bonus for those possessing keen interest in better investing, wealth creation, and FinTech/WealthTech experience.

Collaborate effectively through coding tools such as GitHub, Jira, and Slack.

Enthusiastic, collaborative, driven, curious, professional, fast-paced, detail-oriented.  Clear communicator, flexible work hours to be part of experienced Silicon Valley product team. Able to make constructive contributions to improved team development practices
.

Anticipated first year will be entirely working from home given COVID as Level 3 Contractor, and upon completion of first anniversary will be eligible for sign-on bonus as full time employee. Required to have own effective laptop/development set up and sufficient bandwidth to be exceedingly productive.

We are excited to consider applicants from outside top IITs and top technical cities, so you don’t have to be a graduate of IIT Madras or IIT Bombay, nor living in Bangalore, Pune, or Hyderabad – we are more interested in exceptional and fluent programming talent and passion than just these degrees.  And all that being said, we confess we do have a founding team with degrees and DNA from Stanford, Harvard, and INSEAD.

There will be a technical task/test, a fit/communication interview, and a technical interview.

• Company is developing cutting-edge technology and you will be working on a patented technology in a challenging environment with industry veterans and highly talented engineers
• Company is in an explosive growth path and now is the right time to ride-along and experience the growth from a startup to an iconic large company