Roman Gushel

Promoted to CTO to lead the company through a massive scale-up. Scaled the ad server to handle tens of billions of requests daily, contributing multimillion-dollar annual revenue through product innovation and technical leadership. Played a strategic and hands-on role—driving architecture, cost optimization, and platform evolution while guiding the team through rapid growth and external challenges. - Defined technical direction and oversaw execution across a global engineering team, aligning efforts with business strategy to drive sustained double-digit product growth year over year. - Managed engineering budget and led cost optimization initiatives across infrastructure and tooling. - Established engineering processes including hiring standards, performance reviews, and career development programs. - Researched and built an AI solution (DNN) for optimal bid floor prediction that showed up to 20% revenue increase. - Led infrastructure migrations in analytics (MongoDB to ClickHouse) and event systems (Redis to Kafka), unlocking faster data access and support for billions of events/hour, while reducing infrastructure cost per ad request by 4 times. - Led ad unit development and supply integrations with Prebid, GAM, and AppLovin, unlocking new revenue streams. - Led migration to Go services and API gateway integration, reducing infrastructure costs and increasing throughput. - Delivered a new Publisher Portal built with Flutter for Web, replacing legacy systems and improving UX. - Supported the team through the onset of the war in Ukraine, maintaining operational stability and well-being.

Led the shift from a performance-based model to a programmatic SSP and Ad Network, generating significant revenue in the first year and sustaining strong year-over-year growth. Reassembled the team, cut low-impact projects, and hired high-performing engineers—accelerating feature delivery from biweekly to multiple times a day. Played a key role in system architecture design, reporting directly to the CTO, and scaled traffic to hundreds of millions of bid requests daily while driving hands-on development, team growth, and platform innovation aligned with evolving business goals. - Hired, mentored, and led the R&D team; conducted regular performance and code reviews. - Built and optimized the oRTB ad serving pipeline and advertiser-side integrations, enabling new revenue streams. - Developed profiling, logging, and operational tools that reduced investigation time from hours to minutes. - Implemented statistical models for yield optimization (+20% revenue) and traffic shaping (−50% server load). - Created viewability and ad quality tools with anomaly detection, reducing the risk of serving low-quality ads. - Led SDK updates with new ad units, reducing integration time, risks and creating new revenue opportunities.

Led technical development of mental health platform serving 3,000+ users. Managed 7-person technical team including developers, product managers, designers, and psychologists. Built encrypted chat system and scalable architecture supporting real-time consultations. - Designed platform architecture and led technical implementation - Managed engineering team and established development processes - Built asynchronous encrypted chat system supporting 3k+ consultations - Led product strategy and cross-functional collaboration - Grew platform to 3k therapist profiles

Led technical organization delivering 30+ B2B products across e-commerce, logistics, and media. Managed 20-person engineering team and oversaw architecture, delivery processes, and client success initiatives. - Built and led high-performing engineering team of 20 across multiple domains - Managed complete project lifecycle from scoping to delivery (90%+ on-time) - Architected scalable backends and CI/CD pipelines, reducing launch time by 30% - Established engineering frameworks reducing development time by 50% - Led client technical relationships and delivery partnerships

Promoted to lead a 10-person team while coding hands-on, scaling backend systems to 1M events/day and 500k+ users, and overseeing hiring, planning, and mobile product growth.

Designed and developed a high-load analytics and data management platform for UPnP/DLNA player app.