Ruby on Rails Developer

Job Description – Senior AI Full Stack Engineer

Experience: 8+ Years

Location: Remote

Employment: Haparz Payroll

Budget: Up to 24 LPA

Role Overview

We are looking for an experienced Senior Full Stack Engineer to building a next-generation Agent Development Platform (ADP). This role requires expertise across frontend and backend development, enabling seamless integration between AI-powered applications, platform services, and enterprise-grade administrative interfaces.

You will build scalable React applications, high-performance backend APIs, AI gateway services, and secure multi-tenant platform capabilities while working closely with AI, DevOps, and Product Engineering teams.

Key Responsibilities

• Design, develop, and maintain scalable full-stack applications using React and modern backend technologies.
• Build and enhance the Platform Control Plane and AI Gateway for LLM routing, telemetry, and tenant-level cost management.
• Develop React-based Admin Console features for tenant configuration, security policies, licensing, and budget management.
• Implement FastAPI backend services with secure CRUD operations and multi-tenant data isolation.
• Design and develop RESTful APIs using Python (FastAPI), Java Spring Boot, or Node.js.
• Collaborate on Python and TypeScript SDK development for AI agent integration.
• Build conversational interfaces and administrative dashboards for AI agent interactions.
• Convert platform configurations into YAML-based runtime definitions for AI agents.
• Implement secure authentication, authorization, SSO, and RBAC using WorkOS.
• Ensure secure execution environments using Firecracker MicroVMs, Docker, or Kubernetes.
• Collaborate with DevSecOps teams on deployment automation, scalability, and platform reliability.

Required Skills

• Strong experience in React and modern frontend architecture.
• Hands-on experience with FastAPI (Python).
• Strong backend expertise in Java Spring Boot and/or Node.js.
• Experience designing scalable RESTful APIs.
• Platform Control Plane and AI Gateway development experience.
• Strong understanding of YAML configuration management.
• Experience with PostgreSQL and multi-tenant application architecture.
• Knowledge of secure authentication, OAuth 2.0, WorkOS, and RBAC.
• Experience with Docker, Kubernetes, and containerized deployments.
• Familiarity with AI integration patterns and enterprise platform development.

Preferred Skills

• Langfuse or LangSmith for AI observability.
• ChromaDB, GraphDB, or other vector database integrations.
• Firecracker MicroVMs for secure runtime isolation.
• Temporal Workflow Orchestration.
• Figma-based Design System implementation.
• Experience building AI agent interaction interfaces such as review queues and confidence scoring dashboards.

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).
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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.

Looking for a full stack software developer

• At least 4 years of experience in software engineering.

• Experience in troubleshooting, debugging applications and proactive participation in testing and bug fixes.

• Ability to build scalable applications working on a continuous delivery environment, writing production ready code.

• Knowledge of backend technologies like Java(Preferred), Spring Boot , Microservices, JSON, Python(Good to have).

• Knowledge of frontend technologies like React, Angular.

• Knowledge of database technologies like Postgres(Preferred), Mysql, PostGres, Sql server.

• No sql Database knowledge, Elastic search(Good to have).

• Knowledge on CI/CD tools like Jenkins.

• Knowledge on Event streaming tools like Kafka platform.

• Knowledge of Source Code Management systems Git, github.

Skills: Mernstack, Reactjs,experess,nodejs,MongoDB,PostgreSQL,

Domain knowledge: MERN/PERN stack (Mongo/PostgreSQL, ExpressJS, ReactJS, NodeJS)

Requirements:

• Academics (10th, 12th and Bachelors) > 70-75%
• Highly proficient in ReactJS, NodeJS (ExpressJS)
• Basic knowledge of PostgreSQL/MongoDB is a plus
• Should have expertise in developing data driven, responsive, modern web applications
• Aptitude to continuously learn new languages/concepts. Breadth of knowledge is required
• Strong fundamentals in programming concepts
• Knowledge of web development concepts and databases
• A really strong passion to towards technology
• Entrepreneurial attitude

Roles and Responsibilities:

• Develop, deploy and maintain IIoT platform used by the whole of Company
• Roll out similar IoT systems across the globe
• Understanding the functional domain deeply

• Experience with JavaScript and ReactJs framework.
• Experience with NodeJs, Firebase and Firestore Functions.
• Candidates should have the ability to pick up new technologies quickly
• Knowledge of code versioning tools (such as Git, Mercurial, or SVN)

1. Creating and converting high-fidelity designs into code.
2. Assist with creating cross-platform UI Web components
3. Build responsive applications using front-end frameworks
4. Create Backend services for the UI and test with edge cases.
5. Test components using new technologies

1. Apply for your CV and past work to be reviewed.
2. Receive a telephonic interview or assessment upon filling the final step form.
3. Receive offer letter if selected.

• High School diploma or GED required 
• A minimum of 5 years’ experience designing and building scalable web based applications 
• Experience with RESTful web services, Java/Spring framework, NodeJS applications, React & Vue Frameworks 
• Strong relational database modeling and SQL experience (Oracle, MSSQL)f 
• Solid knowledge of testing principle and ability to build comprehensive test suite  
• Demonstrated UI design and UX sensibilities 
• Experience in scripting against Windows/Linux i.e. PowerShell, VB or Unix Shell Script, Python  
• Ability to coordinate the release/deployment process and versioning, code, configuration management 
• Experience with Git/Bitbucket and Opensource Tools and Agile methodologies 
• Experience leading software developers on development best practices as a technical lead 
• Experience with using JIRA (for defect tracking and for ITSM ticketing with Incident/Problem/Change)  

• Producing clean, efficient code based on specifications.
• Fixing and improving existing software
• Integrate software components and third-party programs
• Verify and deploy programs and systems
• Troubleshoot, debug and upgrade existing software
• Gather and evaluate user feedback
• Recommend and execute improvements
• Create technical documentation for reference and reporting

• Must have good experience on Asp.Net, MCV, C#, Java script, Jquery etc.
• Familiarity with Agile development methodologies
• Experience with software design and development in a test-driven environment
• Knowledge of coding languages (e.g. C#,VB, JavaScript) and frameworks/systems (e.g. AngularJS, Git)
• Experience with databases and Object-Relational Mapping (ORM)
• Ability to learn new languages and technologies
• Excellent communication skills

We are looking for a skilled Full Stack Developer with experience with ReactJS, Nodejs/Express, working exposure to NoSQL, AWS and Python who will be responsible for developing and designing web applications for our company. In order for you to succeed in this role, you will need to be proficient in JavaScript, HTML, CSS, and have solid knowledge and experience in programming applications.

Responsibilities:

• Build the front-end of applications through appealing visual design
• Design client-side and server-side architecture
• Design, develop and manage well-functioning databases and applications
• Test software to ensure responsiveness and efficiency
• Troubleshoot, debug and upgrade software
• Create security and data protection settings
• Build features and applications with a mobile responsive design
• Write technical documentation
• Work with data scientists and analysts to improve software
• Ship code quickly and iteratively every day working with large real world datasets.

Requirements:

• Proficient in Javascript (React/Angular/Vue) Preferable good experience with Nodejs, Express)
• Bachelor degree in Web development or related field, or relevant experience.
• Solid knowledge and experience in programming applications.
• Proficient in NoSQL (MongoDB) and SQL (MySQL, Postgres)
• Dedicated team player.
• Ability to thrive in a fast-paced environment.
• Solid ability in both written and verbal communication.
• Knowledge of programming language and technical terminology.
• Able to develop ideas and processes and clearly express them.
• High degree of independent judgment.
• Able to solve complex problems.
• Experience with Python, RoR and/or PHP desired.

Responsibility :