Swarna Kanti Hazra, Developer in St. John's, NL, Canada
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Swarna Kanti Hazra

Verified Expert  in Engineering

Full-stack Developer

St. John's, NL, Canada

Toptal member since January 9, 2024

Expertise
Front-endFull-stackWeb DevelopmentReact.jsNode.jsJavaScriptJavaSQLReduxExpress.jsMySQLPostgreSQLPythonDocker
Bio

Swarna is a full-stack developer with four years of experience in various tech stacks, notably Node.js and React Native. Throughout his career, he has worked on diverse projects and has been the sole architect for AI-powered social and study apps like Lyckli and Ztudy. Swarna thrives in environments that foster growth and development among individuals and the team.

Portfolio

Nestle Purina - Petivity
JavaScript, Azure, Node.js, Azure Logic Apps, Database Modeling, ETL...
Lyckli AB
Express.js, Node.js, Tailwind CSS, React Native, Expo, MySQL, Firebase, OAuth 2...
Kinvectum AB (Ztudy)
Express.js, React Native, MySQL, Expo, Node.js, Tailwind CSS, Jenkins, Firebase...

Experience

  • React Native - 4 years
  • MySQL - 4 years
  • Tailwind CSS - 4 years
  • JavaScript - 4 years
  • Express.js - 4 years
  • Node.js - 4 years
  • Spring Boot - 3 years
  • Django - 3 years

Availability

Part-time

Preferred Environment

IntelliJ IDEA, Visual Studio Code (VS Code), PyCharm, Git

The most amazing...

...challenge I've tackled involved creating a sophisticated pooling system that allows users to seamlessly withdraw their in-game currency from an online platform.

Work Experience

Integration Developer (via Toptal)

2024 - PRESENT
Nestle Purina - Petivity
  • Managed order processing. Developed and maintained efficient back-end solutions for processing inbound and outbound customer orders and requests, ensuring seamless operations.
  • Created and managed Azure resources, including queues, service bus, and app services, to support scalable and reliable application infrastructure.
  • Integrated Nestlé Purina's systems with 3rd-party APIs and services such as NetSuite and Salesforce Marketing Cloud (SFMC), enhancing functionality and data flow.
  • Set up and maintained Azure infrastructure to support various application services, optimizing performance and reliability.
  • Contributed to testing and deployment. Conducted extensive testing through different environments and managed deployment pipelines using Azure DevOps, ensuring smooth transitions from development to production.
  • Worked closely with cross-functional teams to align technical solutions with business objectives, ensuring efficient and effective order processing and customer satisfaction.
Technologies: JavaScript, Azure, Node.js, Azure Logic Apps, Database Modeling, ETL, Windows PowerShell, API Integration, Nutrition & Supplements

Full-stack Developer

2023 - 2024
Lyckli AB
  • Led back-end API development for Lyckli, a social media application aimed at empowering teenagers, ensuring robust and scalable server-side functionality, including authentication.
  • Implemented and managed in-app purchases, integrating RevenueCat for streamlined payment processing and contributing to revenue generation strategies.
  • Oversaw the full-stack app management using React Native to develop and maintain cross-platform compatibility, ensuring seamless accessibility for users on both iOS and Android platforms.
  • Contributed to front-end development, creating engaging and intuitive user interfaces that resonated with the target teenage audience, leading to a 30% increase in user engagement.
  • Managed SQL database operations, optimizing data storage, retrieval, and security, ensuring efficient data handling, and maintaining high data integrity standards.
  • Played a crucial role in cross-functional collaboration, working closely with design, marketing, and product teams to align technical solutions with business objectives and user needs.
Technologies: Express.js, Node.js, Tailwind CSS, React Native, Expo, MySQL, Firebase, OAuth 2, TypeScript, Docker, Kubernetes, MongoDB, Windows, XML, CSS, HTML, Front-end, GraphQL, Full-stack, Python, HTML5, C#, Google Cloud Platform (GCP), Microsoft SQL Server, Cypress, Full-stack Development, Responsive Web Design (RWD), Docker Compose, Material UI, OpenAPI, User Interface (UI), Web Development, Mobile Development, Payment APIs, Card Payments, Downloads, Audio, Videos, Music, Figma, Artificial Intelligence (AI), BigQuery, JavaScript, Azure Logic Apps, Windows PowerShell, Database Modeling, ETL, Data Scraping, Data Management, Test Automation, React Native for Web, iOS, Android, Mobile, Capacitor, App Store, CI/CD Pipelines, Google Analytics, Google Play Console, UI Testing, Mobile Applications, Test-driven Development (TDD), Web Applications, Unit Testing, Mobile First, User Experience (UX), GitHub, On-premise, Twilio, Mobile Apps, Camera API, APIs, API Integration

App Architect

2023 - 2024
Kinvectum AB (Ztudy)
  • Spearheaded the development of Ztudy, a cutting-edge study and learning app, overseeing the entire development lifecycle from conceptualization to deployment and using React Native to ensure a smooth cross-platform user experience.
  • Integrated OpenAI API to provide personalized learning experiences and fast quiz generation, setting the app apart in the educational technology sector.
  • Designed and implemented gamification features, enabling users to engage in competitive and collaborative learning with friends, resulting in a 40% increase in user retention.
  • Managed back-end development using Node.js and Express.js, ensuring robust, scalable server-side operations and seamless integration with front-end functionalities.
  • Oversaw SQL database management, optimizing data structures for efficient storage, retrieval, and analysis of user data and learning materials.
  • Led a team in the agile development process, coordinating efforts between front- and back-end developers, designers, and stakeholders to meet project milestones and deliver a user-focused product.
  • Conducted extensive testing and debugging, ensuring the application's high performance, security, and reliability, leading to a 95% user satisfaction rate post-launch.
Technologies: Express.js, React Native, MySQL, Expo, Node.js, Tailwind CSS, Jenkins, Firebase, SQL, OpenAI, Ionic, Docker, Kubernetes, MongoDB, Windows, XML, CSS, HTML, Next.js, Front-end, GraphQL, Full-stack, Azure, Python, HTML5, Google Cloud Platform (GCP), Microsoft SQL Server, Cypress, Full-stack Development, Responsive Web Design (RWD), Docker Compose, Material UI, OpenAPI, User Interface (UI), Web Development, Mobile Development, Payment APIs, Card Payments, Downloads, Audio, Videos, Music, Figma, Edtech Design, Artificial Intelligence (AI), BigQuery, JavaScript, Azure Logic Apps, Database Modeling, ETL, Data Scraping, Data Management, Test Automation, React Native for Web, iOS, Android, Mobile, Capacitor, App Store, CI/CD Pipelines, Google Analytics, Google Play Console, UI Testing, Mobile Applications, Test-driven Development (TDD), Web Applications, Unit Testing, Mobile First, User Experience (UX), GitHub, On-premise, Twilio, Mobile Apps, Camera API, APIs, API Integration

Full-stack Engineer

2021 - 2023
Feresti AB
  • Developed and maintained various full-stack applications using Java, Spring Boot for the back end, and React for the front end, ensuring seamless user experiences and robust back-end functionality.
  • Implemented complex SQL queries for data manipulation and retrieval, optimizing database performance and ensuring efficient data handling.
  • Collaborated with cross-functional teams to design, develop, and deploy scalable software solutions, meeting project specifications and timelines. This collaboration led to a 15% reduction in project delivery times.
  • Engaged in all phases of the software development lifecycle (SDLC), including requirement analysis, design, development, testing, deployment, and maintenance.
  • Participated in code reviews to maintain code quality and incorporate best practices, resulting in a 20% decrease in post-deployment issues.
  • Utilized React to create dynamic and responsive user interfaces, improving user engagement and satisfaction.
Technologies: Spring Boot, PostgreSQL, Java, Django, WordPress, PHP, Jenkins, React, Redux, Agile DevOps, JUnit, Amazon Web Services (AWS), Docker, Kubernetes, MongoDB, Windows, Electron, XML, CSS, HTML, Next.js, Front-end, GraphQL, Monorepos, Full-stack, Azure, Python, HTML5, C#, Google Cloud Platform (GCP), Microsoft SQL Server, Cypress, Full-stack Development, Responsive Web Design (RWD), Docker Compose, Material UI, User Interface (UI), Web Development, Mobile Development, Payment APIs, Card Payments, Downloads, Audio, Videos, Music, Figma, Artificial Intelligence (AI), BigQuery, JavaScript, Azure Logic Apps, Database Modeling, ETL, Data Scraping, Data Management, Heroku, Test Automation, .NET, React Native for Web, iOS, Android, Mobile, Flutter, Xamarin, Capacitor, App Store, CI/CD Pipelines, Google Ads, Google Analytics, Google Play Console, Mobile Applications, Test-driven Development (TDD), Web Applications, Object-oriented Design (OOD), Unit Testing, Mobile First, User Experience (UX), GitHub, On-premise, Mobile Apps, Camera API, APIs, Terraform, API Integration

Experience

Ztudy

As the sole architect, I undertook comprehensive design and development responsibilities for both the front and back end of Ztudy, a specialized study application. The platform was meticulously crafted to provide personalized teaching and facilitate the generation of custom quizzes and tests for knowledge validation. Employing React for the front end and Node.js for the back end, I integrated OpenAI APIs to enhance the app's capabilities.

Lyckli

Developed in-app purchases, optimized the back-end infrastructure, and contributed to the user interface design for Lyckli. This social networking application, tailored for high school students, was constructed utilizing React Native for the front end and Node.js for the back end.

Skills

Libraries/APIs

React, Node.js, OpenAPI, React Native for Web, Camera API

Tools

Expo, Docker Compose, GitHub, IntelliJ IDEA, Jenkins, Git, Figma, Prisma, Azure Logic Apps, Capacitor, Google Analytics, PyCharm, BigQuery, Terraform

Languages

JavaScript, TypeScript, Java, SQL, Python 3, CSS, HTML, Python, HTML5, C#.NET, XML, GraphQL, C#, PHP

Frameworks

React Native, Redux, Express.js, Next.js, Tailwind CSS, Spring Boot, Django, Ionic, Cypress, Material UI, Windows PowerShell, .NET, OAuth 2, JUnit, Electron, Flutter

Paradigms

Functional Programming, Responsive Web Design (RWD), Mobile Development, Object-oriented Design (OOD), Object-oriented Programming (OOP), ETL, Test Automation, Test-driven Development (TDD), Unit Testing

Platforms

Visual Studio Code (VS Code), Docker, Mobile, iOS, Android, MacOS, Amazon Web Services (AWS), Windows, Azure, Google Cloud Platform (GCP), Heroku, Twilio, WordPress, Firebase, Kubernetes, Xamarin, Google Ads

Storage

MySQL, MongoDB, PostgreSQL, Database Modeling, Microsoft SQL Server, On-premise

Other

Front-end, Full-stack, Full-stack Development, Web Development, Card Payments, Downloads, Audio, Videos, Edtech Design, Mobile Applications, Web Applications, User Experience (UX), Mobile Apps, APIs, API Integration, User Interface (UI), Payment APIs, Music, Artificial Intelligence (AI), Data Scraping, Data Management, App Store, CI/CD Pipelines, Google Play Console, UI Testing, Mobile First, Nutrition & Supplements, OpenAI, Agile DevOps, Monorepos

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