About Us 

At GrayCellamerica, we help organizations drive transformation with tailored IT consulting, development, and staffing solutions. Headquartered in New Jersey since 2003, our services span industries like BFSI, healthcare, and aerospace, delivered by a team of experts who value quality, agility, and real-world impact. We’re currently hiring a Full Stack App Developer who can take ownership of project execution from start to finish. This role is ideal for someone who enjoys working across the entire stack — from crafting sleek UIs to building scalable backend systems.

Primary Responsiblities

• Develop cross-platform mobile applications using Flutter
• Build and maintain robust backend systems using Ruby on Rails and PostgreSQL
• Create responsive frontend interfaces using HTML5, CSS3, and Bootstrap
• Manage cloud deployment on AWS or DigitalOcean
• Implement secure authentication flows using Devise, Firebase Auth, or OAuth 2.0
• Integrate third-party APIs such as Google Maps and payment gateways like PhonePe or Razorpay 
• Take complete ownership of projects — from development to deploymentTake complete ownership of projects — from development to deployment
• Write clean, maintainable code and conduct regular debugging and optimization

Primary Responsiblities

• Develop cross-platform mobile applications using Flutter
• Build and maintain robust backend systems using Ruby on Rails and PostgreSQL
• Create responsive frontend interfaces using HTML5, CSS3, and Bootstrap
• Manage cloud deployment on AWS or DigitalOcean
• Implement secure authentication flows using Devise, Firebase Auth, or OAuth 2.0
• Integrate third-party APIs such as Google Maps and payment gateways like
• PhonePe or Razorpay
• Take complete ownership of projects — from development to deployment
• Collaborate with stakeholders for requirement gathering, planning, and delivery
• Write clean, maintainable code and conduct regular debugging and optimization

Tech Requirements

• Mobile: Flutter
• Backend: Ruby on Rails
• Frontend: HTML5, CSS3, Bootstrap
• Database: PostgreSQL
• Authentication: Devise, Firebase Auth, OAuth 2.0
• Cloud: AWS / Digital Ocean
• Integrations: Google Maps API, PhonePe, Razorpay

Qualifications

• 1–3 years of experience as a Full Stack Developer
• Strong hands-on experience with both frontend and backend technologies
• Ability to work independently and manage complete project cycles
• Strong debugging, problem-solving, and communication skills
• Prior experience integrating third-party services and APIs
• A self-starter with a proactive and detail-oriented approach