Bohdan Lesiv

Rebuilt platform architecture and billing tracking, integrated fitness devices and admin tools, and helped raise $1M in client revenue by restoring and scaling a cohort-based project.

Led architecture and project delivery as CTO, mentored Python engineers to mid-level hires, launched a health coaching system with health-metrics analysis and delivered cost-reduction consulting for complex engineering systems.

Established QA culture and test automation ecosystem, increased unit test coverage reducing bug costs, and built CV-based data validators and client-side data replicator to accelerate ML testing and reduce training costs.

Built data-layer test coverage and validators, created FHIR/HL7-based data generators and faulty-data validators for ETL, and integrated Stripe payments while establishing CI/CD for the data team.

Maintained backend systems and test frameworks, led load/performance testing uncovering bottlenecks that secured a major China contract and migrated a data system saving the customer over 2x in costs.

Set up and maintained UI/API/load test frameworks, mentored team members, improved security and halved manual testing through hybrid human/code processes, and prevented outage during a mass online event via stress testing.

Maintained and enhanced testing frameworks and features, reducing execution time from 3.5 hours to 35 minutes through profiling and system optimization.

Designed and executed testing strategies and documentation, applied white-box techniques and scripting to reduce production bugs and manual testing time, and led knowledge-sharing sessions.

Maintained test frameworks during internship and successfully transitioned into the core team after evaluation.

Completed a Bachelor degree at Lviv Polytechnic National University from 2013 to 2018.

Completed a Bachelor degree at Drohobych State Ivan Franko Pedagogical Institute from 2011 to 2016.