Arvind Kushwah
Senior Full Stack Software Engineer
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About
Senior Full Stack Software Engineer with 13+ years of experience building scalable SaaS platforms, enterprise applications, and cloud-native systems. Specialized in Ruby on Rails, Python, React, Next.js, React Native, PostgreSQL, AWS, and Docker, with hands-on expertise building Generative AI and Agentic AI features using OpenAI, LLM integration, and intelligent automation workflows. Experienced in leading complete software development lifecycles — from solution architecture and implementation to deployment, performance optimization, and long-term product evolution — for international clients.
Experience
Principal Software Engineer - Bittern Technologies
(2016-01)
- Led end-to-end design and development of SaaS, CRM, ERP, property management and AI-powered products.
- Designed and built Agentic AI workflows that autonomously handle multi-step tasks such as support triage, document processing, and workflow automation.
- Developed Generative AI features and integrated OpenAI APIs to build AI-powered assistants, including conversational interfaces and natural-language query tools.
- Designed scalable multi-tenant Ruby on Rails architectures and REST APIs.
- Built modern React and Next.js frontends with responsive UI/UX.
- Integrated OpenAI, Stripe, Plaid, Twilio, SendGrid, Google Maps and other third-party services.
- Managed AWS infrastructure, Docker deployments, CI/CD pipelines and production environments.
- Worked directly with international clients, translating business requirements into production-ready software.
- Mentored developers and drove code quality, testing and performance optimization.
Freelance / Contractor - Toadster Technologies Private Limited
(2024-01 - 2025-01)
- Delivered scalable full-stack web applications using Ruby on Rails, React, Next.js, PostgreSQL, AWS, Docker, CI/CD, and AI/GenAI integrations for business solutions.
- Collaborated with stakeholders and development teams, participating in architecture decisions, code reviews, debugging, deployment, and production support.
- Designed and developed scalable web applications and SaaS solutions, building backend APIs and responsive frontends.
- Integrated AI, GenAI, and Agentic AI capabilities into business applications, including LLM-powered workflows and intelligent automation.
Software Engineer - Builder.ai
(2020-10 - 2020-01)
- Designed and developed scalable RESTful APIs to support web and mobile applications and business workflows.
- Architected API endpoints, request/response structures, authentication, authorization, and data validation.
- Developed backend services using Ruby on Rails, following clean architecture and REST API best practices.
- Designed database models, relationships, and API data structures for scalable application development.
- Integrated third-party services and APIs to extend application functionality and automate business workflows.
- Collaborated with product managers, designers, and frontend developers to convert requirements and designs into production-ready features.
- Improved API performance through query optimization, caching, pagination, and efficient database operations.
- Followed Agile development practices and contributed to sprint planning, estimation, and delivery.
Senior Ruby on Rails Developer - Flexsin Technologies Pvt. Ltd. - Noida
(2015-03 - 2016-02)
- Designed and developed scalable Ruby on Rails applications.
- Optimized SQL queries and application performance.
- Collaborated with frontend teams and third-party integrations.
Ruby on Rails Developer - Yuvasoft Solutions Pvt. Ltd. - Indore
(2013-09 - 2015-02)
- Developed Ruby on Rails applications using MySQL and PostgreSQL.
- Integrated payment gateways (Stripe, PayPal) and external APIs.
- Worked in an Agile environment with RSpec testing.
- Deployed Ruby on Rails applications on Heroku and AWS EC2 instances.
- Debugged applications in production environments and resolved bugs.
Education
Master of Computer Applications (MCA) - Computer Science - Rajiv Gandhi Prodyogiki Vishwavidyalaya (2010-01 - 2013-01)
Bachelor of Computer Applications (BCA) - Makhanlal Chaturvedi University (2007-01 - 2010-01)
