Sergey Salnikov

B2B SaaS platform for mobile marketing analytics, creative operations, and UA automation. • Own full technical architecture and delivery: backend services (Python, Go, Node.js/TypeScript), data pipelines, frontend, infrastructure, and DevOps for a platform processing 50M+ events/day from 10+ ad network integrations. • Built cohort-based ROAS/LTV forecasting engine (7–540 day horizons) — the analytical backbone for UA spend optimization; forecast accuracy within 8% of actuals. • Designed web and mobile traffic attribution layer: MMP postback processing, SKAdNetwork conversion value mapping, cross-channel deduplication, click/impression-level data reconciliation. • Defined metrics framework (ROAS, LTV, CPI, retention curves) as single source of truth; built self-service dashboards and automated reporting, eliminating ~20 hours/week of manual data extracts. • Established CI/CD pipelines, Grafana-based monitoring/alerting, on-call rotation, and SLA/SLO framework ensuring 99.9%+ service availability. • Implemented data quality checks, cross-source reconciliation, and freshness monitoring; reduced data discrepancies between source systems by 95%. • Led cloud infrastructure cost optimization (FinOps): right-sizing and scheduling reduced compute spend by ~30%. • Built creative pipeline: asset versioning, Figma integration, multi-format preview (20+ formats), automated upload to Meta/TikTok/Unity.

One of Europe's largest gaming companies. B2B/B2C high-load gaming services and analytics. • Led 20+ engineers across backend, frontend, QA, and data teams in a multi-location, matrix structure; managed hiring, onboarding, performance reviews, and org design. • Drove architecture decisions for high-load game services (peak 500K+ concurrent users), real-time event pipelines, and player analytics infrastructure. • Oversaw marketing analytics pipelines: install tracking, campaign performance, and cohort-based player LTV analysis across web and mobile channels. • Introduced structured delivery: 2-week sprints, backlog prioritization, WIP limits, cross-team dependency management — improved team delivery cadence by ~25%. • Improved system reliability through observability (Grafana/Kibana), incident response playbooks, and tiered service availability standards; reduced P1 incident MTTR by 40%.

Russia's largest internet company. 100M+ users across mail, portal, social, and cloud products. • Led a backend team building and maintaining high-load microservices handling millions of daily requests with 99.95% uptime. • Owned architecture reviews, code quality standards, and production reliability (SLA/SLO monitoring, alerting); reduced critical bugs in production by 60% through systematic code review processes. • Collaborated cross-functionally with product, QA, and DevOps; participated in resource planning and cross-team prioritization in a matrix org.

Digital agency delivering SaaS platforms for enterprise clients in healthcare and oil & gas. • 2011–2015: Full-stack development (Python, PHP, Angular) of enterprise SaaS applications. Built a patient management system used by 200+ clinics. • 2015–2018: Took ownership of code reviews, technical mentoring, and architectural decisions. Led migration from monolith to modular service architecture, reducing deployment time from hours to minutes. • 2018–2021: Managed a team of 5–8 engineers. Drove UI/UX improvements, introduced CI/CD practices, and coordinated delivery across 3–4 concurrent client projects. Grew team's annual delivery throughput by ~40%.