Teams at BJAK

Plan, manage, and optimize paid user acquisition campaigns across multiple advertising platforms. Own budgets, analyze CAC, ROAS, LTV, cohorts, attribution, and payback periods. Run experiments across audiences, bids, landing pages, and creatives; collaborate with creative teams; and scale profitable campaigns across markets using data-driven acquisition strategies.

Build, deploy, and improve production machine learning systems for classification, retrieval, ranking, personalization, and evaluation. Develop efficient models and pipelines, optimize accuracy, latency, cost, and reliability, fine-tune existing models, monitor production performance, and use real-world feedback to drive improvements. Collaborate with engineering and product teams to deliver reliable AI-powered features.

Owns technical direction and hands-on execution for major products and systems. Designs scalable backend, frontend, API, database, and infrastructure solutions; writes code; leads architecture decisions; drives initiatives through production; improves engineering quality, reliability, security, testing, and observability; solves complex production problems; and mentors engineers across teams.