~/experience.sql

-- experience.sql — professional history, ordered by start_date desc

Experience

select * from career order by start_date desc;

Oct 2025 — Present current

Data Engineer / Analytics Engineer

@ EPAM Systems — Tashkent

Data Analytics Engineering and Data Quality delivery track — end-to-end warehouse, pipeline and reporting work on internal client projects.

  • Designed a layered data warehouse architecture — staging/ODS, 3NF integration core, and Kimball star-schema data marts — across 11 source tables, choosing the layer boundaries so that every mart figure is traceable back to its source record.
  • Built the full DWH load in PL/pgSQL stored procedures, implementing incremental loading with NOT EXISTS deduplication and history handling so re-runs stay idempotent; reduced daily refresh from around 28 to 13 minutes.
  • Analysed source systems and produced source-to-target mappings and data-flow documentation covering 14 entities (over 50 attributes), used as the reference for development and validation.
  • Built cloud ingestion on AWS: raw CSV/XLSX staged in S3, loaded to Redshift via COPY, with RDS PostgreSQL for operational data and IAM-scoped role-based access.
  • Wrote automated data-quality suites in PyTest covering row-count completeness, transformation accuracy and referential integrity; investigated and resolved 250+ discrepancies between source and mart layers.
  • Optimised slow-running SQL through indexing, join rewrites and partitioning fundamentals; ran load testing in JMeter via Jenkins CI.
  • Delivered 5+ Power BI dashboards on top of the marts, connecting directly to Redshift and writing DAX measures for revenue, margin and payment KPIs.
  • Gathered and clarified requirements with stakeholders, translating business questions into modelling and pipeline decisions inside an Agile/SDLC process.
PostgreSQLPL/pgSQLRedshiftS3RDSPythonPyTestPower BIJenkins CI
Feb 2023 — Oct 2025

Software Engineer

@ VYXEL Games — contract, via Upwork

UEFN and Unreal Engine 5 experiences and client interactive applications, in an Agile team of 4–5.

  • Architected event-driven systems that decoupled logic from content, enabling designers to ship new modes without engineering involvement.
  • Built data-driven configuration structures for mechanics and state machines, replacing hard-coded logic across 15+ systems and cutting iteration time.
  • Profiled and eliminated runtime bottlenecks, improving performance on target hardware by around 31%.
  • Worked directly with clients and designers to scope, estimate and deliver features against deadlines.
Unreal Engine 5UEFNEvent-driven systemsPerformance profilingAgile
Erkinov Jahongir
Upwork / VYXEL Games
Professional references available on request.