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Donatas Zadeikis

@donataszadeikis

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Senior Full Stack Engineer with a passion for innovative solutions.

Lithuania

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What I'm looking for

I am looking for a role that fosters innovation, encourages collaboration, and offers opportunities for professional growth.

I am a Senior Full Stack Engineer with over 12 years of experience in overseeing the entire software development life cycle (SDLC). My journey has been marked by a commitment to continuous learning and innovation, allowing me to architect and lead the development of key features that enhance user engagement and platform performance. At Soundiiz, I drove a 20% increase in daily active users through the integration of music streaming services, while also optimizing APIs to reduce audio buffering by 30%.

Throughout my career, I have demonstrated strong technical leadership and a results-driven approach. My role at 4IRE involved integrating DeFi solutions into the QuickBooks platform, which improved transaction efficiency by 30%. I thrive in collaborative environments, working closely with project managers and stakeholders to deliver user-friendly interfaces and scalable architectures. My technical expertise spans a wide range of languages and frameworks, including Python, React, and AWS, enabling me to tackle complex challenges effectively.

Experience

Work history, roles, and key accomplishments

Current

Senior Full Stack Engineer

Current

Soundiiz

Sep 2021 - Nov 2024 (3 years 2 months)

Led the development of full-stack features for a music streaming service, achieving a 20% increase in daily active users. Optimized streaming APIs and implemented a microservices architecture, enhancing system reliability and reducing operational costs by 15%. Improved front-end performance, reducing page load times by 25%.

React React Native Python Django AWS Microservices Optimization

Senior Full Stack Engineer

4IRE

Apr 2019 - Jul 2021 (2 years 3 months)

Integrated DeFi solutions into QuickBooks, enhancing financial management for crypto transactions. Optimized ledger management with Python and AWS, scaling to handle over 500,000 transactions daily. Designed user-friendly interfaces with React, improving user satisfaction by 15%.

Python Flask GraphQL AWS React Redux DeFi Optimization

Full Stack Developer

Bison Commerce

Jun 2016 - Mar 2019 (2 years 9 months)

Automated inventory and order tracking processes, improving efficiency by 20%. Built reusable UI components and developed scalable microservices with Python and Django, enhancing system performance to handle increased user traffic. Integrated payment gateways, boosting completed sales by 10%.

Python Django Flask UI Components Microservices Scalable Systems

Junior Software Engineer

Hexatronic

Aug 2013 - Apr 2016 (2 years 8 months)

Contributed to core social media features, improving user engagement by 15%. Assisted in algorithm implementation for friend suggestions, leading to a 10% increase in connections. Collaborated on RESTful API development, ensuring high system uptime and optimizing front-end code.

RESTful APIs Algorithm Development User Engagement Collaboration System Uptime

Education

Degrees, certifications, and relevant coursework

Vilnius University

Bachelor of Computer Science, Computer Science

2010 - 2013

Completed a Bachelor's degree in Computer Science, focusing on software development, algorithms, and data structures, which provided a strong foundation for a career in technology and engineering.