Available for Amazing Projects
Robert Siennicki
Software Engineer. Product Builder.
AI Architect in the Making.
Building for Scale & Intelligence
Software Engineer with 15+ years of experience. From engineering high-traffic systems at OLX to collaborating in global, multicultural environments like Changi Airport. Currently bridging the gap between traditional backend architecture and the Agentic AI ecosystem.
Based in Warsaw, Poland.
Work remotely around the world.
Work Experience
Proven track record in data science and business consulting, delivering impactful insights and results across industries.
Software Engineer
OLX Group·Full-Time
April 2024 – Present
Poland
·Remotely
Scaling one of the world's largest classifieds platforms. Focus on high-traffic microservices and enterprise reliability.
Software Engineer
Carsmile·Full-Time
April 2022 – April 2024
Poland
·Remotely
Architected the acquisition engine. Optimized performance and conversion for Poland's leading automotive platform during its hyper-growth phase.
Co-Founder
MoodSense·Startup
November 2021 – Present
Poland
·Remotely
Architecting AI-driven insights for the mental-tech space.
Founder
Madcode·Owner
November 2015 – Present
Poland
·Remotely
Building and scaling bespoke digital products for international clients.
Professional Skills
A full-stack competency set spanning frontier AI and enterprise engineering.
Engineering Foundation
NextJSReactTypeScriptPHPDistributed SystemsMicroservicesAWSAPI Design
Product & Growth
Performance OptimizationCore Web VitalsSEO EngineeringCRO
Licenses & Certifications
Professional accreditations certifications and degrees demonstrating expertise and compliance with industry standards.
Computer Science and Econometrics
Bachelor's degree·Maria Sklodowska-Curie Warsaw University
2010 – 2013
Let’s build the future of software!
Whether it’s high-scale backend engineering or cutting-edge AI automation — I’m always open to discussing complex technical challenges.