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

I am an application developer with over 8 years of experience in software engineering, specializing in full stack development with Python and JavaScript frameworks. I design and build scalable, secure applications, translating Figma UI designs into polished features and integrating payment systems with robust access controls. Working remotely across cross-functional teams has sharpened my collaboration and problem-solving skills, and I continuously seek opportunities to optimize performance and security while delivering maintainable code.…I am an application developer with over 8 years of experience in software engineering, specializing in full stack development with Python and JavaScript frameworks. I design and build scalable, secure applications, translating Figma UI designs into polished features and integrating payment systems with robust access controls. Working remotely across cross-functional teams has sharpened my collaboration and problem-solving skills, and I continuously seek opportunities to optimize performance and security while delivering maintainable code.

Zeljko Krsmanovic

Full Stack Developer, Web Developer, Programmer, +2





I am an application developer with over 8 years of experience in software engineering, specializing in full stack development with Python and JavaScript frameworks. I design and build scalable, secure applications, translating Figma UI designs into polished features and integrating payment systems with robust access controls. Working remotely across cross-functional teams has sharpened my collaboration and problem-solving skills, and I continuously seek opportunities to optimize performance and security while delivering maintainable code.…I am an application developer with over 8 years of experience in software engineering, specializing in full stack development with Python and JavaScript frameworks. I design and build scalable, secure applications, translating Figma UI designs into polished features and integrating payment systems with robust access controls. Working remotely across cross-functional teams has sharpened my collaboration and problem-solving skills, and I continuously seek opportunities to optimize performance and security while delivering maintainable code.

Available to hire

I am an application developer with over 8 years of experience in software engineering, specializing in full stack development with Python and JavaScript frameworks. I design and build scalable, secure applications, translating Figma UI designs into polished features and integrating payment systems with robust access controls.

Working remotely across cross-functional teams has sharpened my collaboration and problem-solving skills, and I continuously seek opportunities to optimize performance and security while delivering maintainable code.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Senior Software Engineer at ERT Solutions (Contract)

August 1, 2023 - August 1, 2025

Developed and maintained web applications using Python and React Native, aligned with Figma designs and enhanced UI functionality. Integrated secure payment systems and implemented role-based access controls to safeguard user data and transactions. Collaborated remotely with cross-functional teams to refine application features and improve scalability and security. Participated in regular meetings to discuss progress and propose technical improvements for ongoing project evolution. Utilized debugging and monitoring tools to troubleshoot production issues and optimize app performance.

Full Stack Engineer at GoldeFy (Part-time)

February 1, 2021 - March 1, 2022

Built and maintained full stack components using Python and JavaScript frameworks, focusing on payment integration and user authentication. Translated Figma UI designs into responsive and accessible front-end features, enhancing user experience. Collaborated in remote settings to deliver incremental improvements and new functionalities aligned with project goals. Applied problem-solving skills to adapt to evolving project requirements and technical challenges. Managed version control and deployment pipelines to streamline continuous integration and delivery.

Software Engineer at MoonPay

September 1, 2019 - June 1, 2021

Developed backend services and APIs using Python frameworks supporting payment processing and role-based access. Worked closely with UI/UX teams to implement Figma-based designs into functional React Native components. Enhanced application security and performance through code optimization and secure authentication methods. Engaged in remote collaboration to prioritize feature development and resolve technical issues. Maintained documentation and provided technical input for new feature proposals and improvements.

Software Engineer at BrightInsight (Contract)

July 1, 2017 - July 1, 2019

Delivered software infrastructure solutions focusing on secure data handling and scalable application architecture. Integrated user authentication systems and contributed to payment gateway implementations. Collaborated with remote teams to align development with user interface designs and business requirements. Applied troubleshooting techniques to address production bugs and improve system reliability. Supported continuous integration workflows using Git and containerization technologies.

Software Engineer at Working Excellence (Part-time)

December 1, 2014 - May 1, 2016

Assisted in software engineering tasks including coding, testing, and debugging in a collaborative environment. Participated in translating design specifications into functional application modules. Supported integration of authentication features and contributed to payment system components. Developed problem-solving approaches to meet evolving project demands. Engaged in team communication to ensure alignment with project timelines and objectives.