Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

Hi, I'm Sushil Sainju, a software engineer with over 10 years of experience building full-stack web apps, mobile apps, and scalable SaaS platforms using modern JavaScript frameworks and backend technologies. I enjoy solving complex technical challenges across the stack, from frontend interfaces built with React and Next.js to secure, well-architected backend services using Node.js, NestJS, and Ruby on Rails. I'm passionate about clean code, performance, and long-term maintainability. As a strategic team leader, I mentor developers, conduct code reviews, and drive end-to-end product lifecycles. I’m analytical, curious, and client-focused, with a track record of aligning technical execution with business objectives to deliver reliable, scalable software.…Hi, I'm Sushil Sainju, a software engineer with over 10 years of experience building full-stack web apps, mobile apps, and scalable SaaS platforms using modern JavaScript frameworks and backend technologies. I enjoy solving complex technical challenges across the stack, from frontend interfaces built with React and Next.js to secure, well-architected backend services using Node.js, NestJS, and Ruby on Rails. I'm passionate about clean code, performance, and long-term maintainability. As a strategic team leader, I mentor developers, conduct code reviews, and drive end-to-end product lifecycles. I’m analytical, curious, and client-focused, with a track record of aligning technical execution with business objectives to deliver reliable, scalable software.

Sushil Sainju

Full Stack Developer, Front-End Developer, Back-End Developer, +2





Hi, I'm Sushil Sainju, a software engineer with over 10 years of experience building full-stack web apps, mobile apps, and scalable SaaS platforms using modern JavaScript frameworks and backend technologies. I enjoy solving complex technical challenges across the stack, from frontend interfaces built with React and Next.js to secure, well-architected backend services using Node.js, NestJS, and Ruby on Rails. I'm passionate about clean code, performance, and long-term maintainability. As a strategic team leader, I mentor developers, conduct code reviews, and drive end-to-end product lifecycles. I’m analytical, curious, and client-focused, with a track record of aligning technical execution with business objectives to deliver reliable, scalable software.…Hi, I'm Sushil Sainju, a software engineer with over 10 years of experience building full-stack web apps, mobile apps, and scalable SaaS platforms using modern JavaScript frameworks and backend technologies. I enjoy solving complex technical challenges across the stack, from frontend interfaces built with React and Next.js to secure, well-architected backend services using Node.js, NestJS, and Ruby on Rails. I'm passionate about clean code, performance, and long-term maintainability. As a strategic team leader, I mentor developers, conduct code reviews, and drive end-to-end product lifecycles. I’m analytical, curious, and client-focused, with a track record of aligning technical execution with business objectives to deliver reliable, scalable software.

Available to hire

Hi, I’m Sushil Sainju, a software engineer with over 10 years of experience building full-stack web apps, mobile apps, and scalable SaaS platforms using modern JavaScript frameworks and backend technologies. I enjoy solving complex technical challenges across the stack, from frontend interfaces built with React and Next.js to secure, well-architected backend services using Node.js, NestJS, and Ruby on Rails. I’m passionate about clean code, performance, and long-term maintainability.

As a strategic team leader, I mentor developers, conduct code reviews, and drive end-to-end product lifecycles. I’m analytical, curious, and client-focused, with a track record of aligning technical execution with business objectives to deliver reliable, scalable software.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Sr. Software Engineer | Dev Lead at WhiteHat Engineering

January 1, 2025 - September 24, 2025

Architected and led the development of multitenant enterprise SaaS applications using TypeScript, NestJS, and Next.js. Directed cross-functional teams and managed the full Agile SCRUM cycle with Jira. Built mobile-responsive frontend UI with modern CSS and component-based architecture, ensuring cross-device compatibility. Integrated third-party APIs for mailing/messaging (SparkPost, Mandrill, Twilio) and payments (Stripe) following encryption/tokenization best practices. Integrated AWS SES for email dispatch, and created a Gmail automation add-on leveraging OpenAI. Conducted in-depth code reviews and system design discussions to promote clean coding standards and performance. Collaborated with product owners and stakeholders to translate requirements into technical specs. Worked on a Unity 3D web game, handling 3D modeling integration and gameplay mechanics. Designed scalable PostgreSQL schemas for multi-tenant SaaS, wrote complex SQL queries, materialized views, and stored procedures.

Sr. Software Engineer at WhiteHat Engineering

August 1, 2021 - September 24, 2025

Developed full-stack web applications using Ruby on Rails, Node.js, and React; led multiple feature modules with emphasis on test coverage, documentation, and maintainability. Designed and implemented RESTful and GraphQL APIs with authentication and data validation. Built scalable APIs and middleware, integrating third-party services for low-latency responses. Created reusable frontend components and implemented OAuth 2.0 SSO (Google, Azure AD). Worked on backend services with NestJS and TypeScript, employing decorators and dependency injection for scalable APIs. Maintained PostgreSQL schemas with indexing strategies and contributed to agile ceremonies to improve collaboration and predictability. Migrated legacy applications to newer frameworks and architectures.

Sr. Software Engineer at Bajr a Technologies

September 1, 2015 - September 24, 2025

Led iOS development with Swift, contributing to .NET backend applications for data-driven solutions. Worked on cross-platform game development using Unity, including 3D modeling integration, physics, and animation scripting. Built internal tools with Node.js to improve team workflows and data synchronization. Assisted in migrating legacy SQL Server data to PostgreSQL, ensuring compatibility and accuracy. Collaborated with designers and QA to meet usability and quality goals, and participated in knowledge-sharing sessions to accelerate adoption of new technologies.

Associate Software Engineer at Deer Walk Inc

April 1, 2012 - September 24, 2025

Developed web modules using ASP.NET MVC3 and C#, ensuring HIPAA compliance. Built and consumed REST APIs to support enterprise software platforms. Implemented database queries and stored procedures in SQL Server for large datasets. Participated in requirement gathering with business analysts and contributed to technical strategy. Completed HIPAA training and performed unit testing to ensure quality. Created reusable code libraries to reduce duplication and improve productivity, and supported legacy system migrations to modern architectures.

.NET Developer at Javra Software

August 1, 2011 - September 24, 2025

Gained hands-on experience in web development using ASP.NET and C#, contributing to internal tool development. Applied best practices in version control, debugging, and team-driven workflows. Assisted in writing SQL queries and reports for database-driven features. Collaborated with senior developers to build small modules and automation scripts, and documented technical resources for team knowledge sharing.