Hi, I’m Joana Kelly, a dynamic full-stack developer with 5 years of experience building scalable web applications. I specialize in React, TypeScript, and REST APIs, delivering high-performance, reliable interfaces. As a backend engineer, I design and optimize REST APIs using Node.js and Spring Boot, secure systems with JWT and RBAC, and have reduced API latency by over 45% (600ms → 320ms). I’m focused on crafting scalable, high-reliability SaaS solutions with clean, robust architecture.…

Joana Kelly

5.0 (1 review)

Hi, I’m Joana Kelly, a dynamic full-stack developer with 5 years of experience building scalable web applications. I specialize in React, TypeScript, and REST APIs, delivering high-performance, reliable interfaces. As a backend engineer, I design and optimize REST APIs using Node.js and Spring Boot, secure systems with JWT and RBAC, and have reduced API latency by over 45% (600ms → 320ms). I’m focused on crafting scalable, high-reliability SaaS solutions with clean, robust architecture.…

Available to hire

Hi, I’m Joana Kelly, a dynamic full-stack developer with 5 years of experience building scalable web applications. I specialize in React, TypeScript, and REST APIs, delivering high-performance, reliable interfaces.

As a backend engineer, I design and optimize REST APIs using Node.js and Spring Boot, secure systems with JWT and RBAC, and have reduced API latency by over 45% (600ms → 320ms). I’m focused on crafting scalable, high-reliability SaaS solutions with clean, robust architecture.

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Skills

Experience Level

React JS
Expert
Node.js
Expert
TypeScript
Expert
Express
Expert
MySQL
Expert
JavaScript
Expert
MongoDB
Expert
Docker
Expert
SQL
Expert
Java
Expert
PostgreSQL
Expert
Spring
Expert
Vue.js
Expert
AWS
Expert
Kubernetes
Expert
Redis
Expert
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Language

English
Fluent

Work Experience

Full Stack Engineer (Backend Focused) at Nordic IT Solutions
January 1, 2024 - Present
Designed and maintained scalable REST APIs using Node.js, serving 1,000+ active SaaS users in production. Improved API performance by optimizing complex SQL queries and implementing effective indexing strategies. Implemented secure JWT-based authentication and RBAC authorization to strengthen application security. Containerized backend services with Docker to ensure consistent development and deployment workflows. Integrated third-party payment and analytics systems supporting core business operations. Collaborated cross-functionally to improve API reliability, reduce production issues, and enhance long-term maintainability.
Full Stack Developer at TechNova Solution
January 1, 2021 - January 1, 2023
Designed and maintained scalable REST APIs using Node.js, serving 1,000+ active SaaS users in production environments. Improved API performance by optimizing complex SQL queries and implementing effective indexing strategies. Implemented secure JWT-based authentication and RBAC authorization to strengthen application security. Containerized backend services with Docker to ensure consistent development and deployment workflows. Integrated third-party payment and analytics systems supporting core business operations. Built and maintained 5+ production web applications with backend-focused architecture.

Education

Bachelor of Science in Computer Science at University of Turku
January 1, 2017 - January 1, 2021

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Professional Services
    paper Spring Boot Backend API

    •Developed RESTful backend using Spring Boot and JPA
    •Implemented JWT-based authentication and RBAC authorization
    •Designed relational database schema with MySQL
    •Containerized using Docker and Docker Compose