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Hi, Client As I am Senior Application Developer, I have strong experience and deep knowledge in React, React Native, Kotlin, Swift and application development for over 9 years. I can fully collaborate your business. I look forward to hearing from you soon.…

Jakub Piorkowski

Full Stack Developer, App Developer, Web Developer, +2

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Hi, Client As I am Senior Application Developer, I have strong experience and deep knowledge in React, React Native, Kotlin, Swift and application development for over 9 years. I can fully collaborate your business. I look forward to hearing from you soon.…

Available to hire

Hi, Client
As I am Senior Application Developer, I have strong experience and deep knowledge in React, React Native, Kotlin, Swift and application development for over 9 years.
I can fully collaborate your business.
I look forward to hearing from you soon.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Senior Mobile Engineer at Scand

March 1, 2021 - Present

Developed cross-platform mobile apps (iOS & Android) using React Native and Flutter, including offline-first functionality and high-performance features. Integrated with backend services (Node.js, Firebase, PostgreSQL) and third-party APIs. Managed mobile CI/CD pipelines and app deployment for multiple environments. Implemented state management, push notifications, and OAuth 2.0 authentication. Applied performance optimization techniques and advanced animations (Reanimated 2.0+). Collaborated with QA and cross-functional teams to ensure crash-free and performant apps.

Backend Engineer at Bain & Company

April 1, 2019 - October 1, 2020

Designed and implemented backend services and REST APIs supporting mobile and web applications. Optimized database queries and ensured high reliability and performance in distributed systems. Contributed to CI/CD pipelines and cloud-based deployment workflows.

Software Engineer at ConQuest Consulting

August 1, 2016 - February 1, 2019

Built full-stack applications with backend services and frontend integrations. Developed reusable backend modules and optimized server performance. Assisted in architectural design and system scalability improvements.

Software Developer at Zalewski Consulting

May 1, 2016 - August 1, 2016

Supported backend and frontend development for internal business applications. Assisted with debugging, deployment, and mobile optimization.