You will get a PostgreSQL performance audit with actionable optimization plan
Project details
Your PostgreSQL database is slow, eating disk, or throwing deadlocks - and you need someone who's fixed this before, not someone who'll learn on your dime.
I've cut query execution time by 70% for Pfizer's supply chain analytics, eliminated chronic deadlocks and 250 GB/day WAL overconsumption, and resolved a €2.5M inventory discrepancy by cross-referencing enterprise databases.
You'll get a prioritized audit report, implemented fixes (on Standard/Advanced tiers), and measurable before/after metrics - not a list of vague recommendations.
I've cut query execution time by 70% for Pfizer's supply chain analytics, eliminated chronic deadlocks and 250 GB/day WAL overconsumption, and resolved a €2.5M inventory discrepancy by cross-referencing enterprise databases.
You'll get a prioritized audit report, implemented fixes (on Standard/Advanced tiers), and measurable before/after metrics - not a list of vague recommendations.
Database Type
PostgreSQLWhat's included
| Service Tiers |
Starter
$149
|
Standard
$349
|
Advanced
$699
|
|---|---|---|---|
| Delivery Time | 3 days | 7 days | 14 days |
Number of Revisions | 1 | 2 | 3 |
Schema Diagram | |||
Permissions Setup | - | - | - |
Import/Export Data | - | - | - |
Admin Panel Setup | - | - | - |
Optional add-ons
You can add these on the next page.
Additional Revision
+$30Frequently asked questions
About Marcin
Senior Data Engineer | Performance Optimization | ETL & Data Pipelines
Warszawa, Poland - 10:12 am local time
What sets me apart is that I don't just write code - I solve hard technical problems and deliver measurable results:
→ Optimized Pfizer's data processing engine, cutting execution time by 70% across their pharma supply chain analytics stack (PostgreSQL + Snowflake + dbt on Azure)
→ Built distributed backend for a Web3 analytics platform: 14 BullMQ queues processing thousands of events daily across 6 servers, with 250+ GB/day WAL reduction through surgical PostgreSQL optimization
→ Resolved a €2.5M inventory discrepancy between DHL and a client ERP in 3 weeks by cross-referencing databases and mapping process gaps
→ Delivered the fastest ERP implementation per vendor with the smallest team - the vendor sent congratulations
→ Built production AI agent (RAG + ReAct pattern) with 10 tools, pgvector search, and WebSocket streaming for real-time crypto intelligence
→ Shipped Solana programs (Rust/Anchor), EVM smart contracts (Solidity), and full-stack blockchain integrations
My enterprise clients (Pfizer, Orange Polska, Procter & Gamble, Ministry of Health) kept choosing to work with me - through vendor changes, team rotations, and budget cuts. I'm the person clients ask to keep.
Tech I work with daily: TypeScript, Node.js, Fastify, tRPC, NestJS, PostgreSQL, TimescaleDB, Snowflake, dbt, Drizzle ORM, Redis, BullMQ, Solidity, Ethers.js, Solana/Anchor, Python, OpenAI/Gemini APIs, Docker, GitHub Actions.
I'm available for backend development, data pipeline architecture, database design & optimization (PostgreSQL, Snowflake, TimescaleDB, dbt), blockchain integrations (Solidity, Solana/Rust), and AI-powered features (RAG, LLM APIs, embeddings). I work independently, communicate clearly, and ship fast.
Steps for completing your project
After purchasing the project, send requirements so Marcin can start the project.
Delivery time starts when Marcin receives requirements from you.
Marcin works on your project following the steps below.
Revisions may occur after the delivery date.
Review
Review your PostgreSQL config, logs, and pg_stat_statements output
Identify bottlenecks
slow queries, lock contention, index issues, WAL bloat