Давид

Poland • [відкрити контакти](див. вище в блоці «контактна інформація»)

DAVID A. Senior Backend Engineer with 4+ years in Go, building high-load
distributed platforms Tech: Go, PostgreSQL, ClickHouse, MongoDB, Kafka,
Redis, gRPC, Docker, AWS, Prometheus
Software Engineer, EJAW - Game Development iGaming — Jan 2026 - Present
Came up with and solo-built a lead-generation service to MVP, then led a 4-engineer team
to ship it to production in 2 months - owning it end to end from client pitch to delivery,
processing 10,000+ leads a month.
Built the platform's core jackpot system from scratch - a high-load progressive jackpot with
async payouts - its flagship engagement feature, driving an 80% jump in players on jackpot
games and ~40% longer sessions.
Rolled out company-wide observability across ~100 microservices, then used load testing to
find the slow service and rebuild it - scaling it from 200 to 5,000 RPS (25x).
Built a game-aggregation service that took the platform from in-house-only games to 30+
external providers - cutting new-provider integration from days to hours through one
standard flow.
Technologies used:
Go, PostgreSQL, ClickHouse, Redis, gRPC, Kafka, Debezium, MongoDB, microservices, Docker,
Kubernetes, Prometheus, Grafana, Loki, Tempo, k6, AI agents

Software Engineer, GO2 Markets Energy Tech — 1.5 y.e. — May 2024 – Nov 2025
Built the matching engine for green-energy certificates across 6 markets - pairing
compatible buyers and sellers error-free - enabling 100+ deals and more reliable sales
conversion.
Built an AI pipeline that extracts emissions data straight from companies' energy documents
- with per-field confidence and a human-review step - cutting data entry from hours to
minutes while keeping figures audit-grade.
Built a microservices ESG platform for ecosystem restoration through tree-planting - for
government agencies and volunteers - geo-zoning, satellite NDVI/air-quality ingestion,
async PDF reporting, and tamper-proof tree-planting verification (GPS checks) - giving
agencies clear data on where to plant trees for the most impact.
Built an engine that turns a company's raw energy data into an audit-ready carbon footprint
- cutting carbon reporting from weeks of manual work to minutes.
Technologies used:
Go, PostgreSQL/PostGIS, Kafka, gRPC, Redis, AWS (Bedrock, S3, SES), Terraform, Grafana,
Prometheus, Loki, Tempo, DDD/Hexagonal

Software Engineer, Kabina Agency MarTech — 1.7 y.e. — Jul 2022 – Apr 2024
Built a production AI service that turns a keyword into a finished SEO article end to end -
scaling output from ~30 to ~500 articles/month while cutting the content team from 4 to 2.
Built a self-correcting quality loop - an AI detector with adjustable quality and cost limits - so
the content never got penalized by search engines, growing the sites' authority and bringing
50,000+ organic visitors a month.
Built an automated link-building system - AI filtering of sites by topic, picking the right
articles, and editing them to add a natural backlink to the client - building 1,000+ referring
domains and ranking client pages at the top of search.
Built a lead-processing service - capturing data on every site visitor, identifying the
companies behind anonymous traffic, and scoring leads by fit and intent - minimizing lead
loss, focusing sales on the right leads first, and lifting conversion ~30%.
Technologies used:
Go, TypeScript, Node.js, REST API, PostgreSQL, MongoDB, Docker, Kubernetes, AI agents,
HuggingFace, DDD

Igor Sikorsky Kyiv Polytechnic Institute Aug 2018 – English (B2), Ukrainian (C1), Russian (C1),
Aug 2022 German (A2)