5+Years of experience
20+Delivered projects
99.9%System uptime
6Case studies with results

About Me

Know me better

I am a Senior Backend Engineer with hands-on experience building, scaling, and maintaining production web applications. My core stack includes Python, Django, PostgreSQL, Celery, Redis, Docker, and cloud infrastructure.

Expertise & Value

Building systems that drive your business

Backend Architecture & Robust APIs

I design production-grade systems from scratch or optimize your existing stacks. Using Python, Django, and PostgreSQL, I map out stable foundations for fast web applications. I solve data bottlenecks to significantly reduce API latency under heavy traffic.

Product-Led Engineering

Code is just a tool to generate ROI. I focus squarely on business outcomes, conversions, and fast time-to-market. I translate technical trade-offs directly into product growth strategy.

Automation & Scraping

I eliminate manual operations from your day-to-day. Using Celery and advanced scripting, I build reliable background workers that continuously extract data, update databases, and deliver alerts.

Complex Integrations

I seamlessly bridge your product with the external world. Integrating payment gateways like Stripe, language models like OpenAI, sophisticated KYC flows, and various CRM platforms.

Security by Design

Data protection and system compliance are built-in from day one. I implement strict access controls and full action traceability to keep your architecture Due Diligence-ready.

Case studies

Selected product and backend case studies

The homepage shows only business-level value snapshots. Full context, delivery decisions, and outcomes are available on dedicated case study pages.

Useme Plus - B2B calculator and membership product development

B2B calculator, Autenti integration, and auto-validation for Useme Plus.

Business value: New revenue line based on a membership product, customer service automation, and faster user onboarding.

  • Comparative cost calculator: Useme Plus vs Polish business entity forms.
  • Autenti integration and electronic document workflow for membership.
View case study

Useme - Job Board search refactor

New search engine and SEO tags deployed safely via feature flags.

Business value: Simplified job and freelancer search, better Google visibility through SEO tags, and safer deployments via feature flags.

  • Search with filtering by phrase, categories, subcategories, and skill tags.
  • Table denormalization to improve database performance and accelerate read operations, easing system load and boosting site responsiveness.
View case study

ParentApp - AI assistant for parents (SaaS)

From MVP to a fully launched AI SaaS with online billing.

Business value: Fast launch of a monetizable digital service combining expert knowledge with personalized user experience.

  • Django + DRF backend with JWT and complete Stripe subscription lifecycle.
  • OpenAI API integration with child-profile context and conversation memory.
View case study

KAS scraper - automated public listing monitoring

Automated ad monitoring and real-time Discord notifications.

Business value: Faster response to relevant listing changes and lower operational load through event-based alerts.

  • Incremental crawler with page-hash deduplication.
  • Playwright fallback for anti-bot protected pages.
View case study

Lead generation automation platform

Automated data pipeline for outbound scaling.

Business value: More qualified leads at lower operational cost and with higher data quality.

  • Automated scraping and record normalization into one data model.
  • Campaign scheduling and queue-driven delivery logic.
View case study

Business process automation suite

API integrations and async jobs that streamline cross-system data flow.

Business value: Shorter process cycle time and fewer manual errors in business-critical workflows.

  • API integrations with partner and internal systems.
  • Asynchronous orchestration with safe retries and controls.
View case study

How I work

Collaboration process - from idea to production

01

Discovery

I gather requirements, business goals, and constraints. I understand the context before writing the first line of code.

02

Architecture

I design the solution, select the stack, and plan migrations. You get a proposal before work begins.

03

Delivery

Iterative implementation with code review, testing, and CI/CD. Regular feedback and visible progress.

04

Support

Monitoring, performance tuning, and documentation. I stay available after deployment.

Core Skills

Python backend engineering stack for production systems

Backend

Python

Python

Django

Django

Django REST Framework (DRF)

Django REST Framework (DRF)

GraphQL

GraphQL

Celery

Celery

Redis

Redis

API integrations

API integrations

Authentication (JWT / OAuth)

Authentication (JWT / OAuth)

Background jobs

Background jobs

System design

System design

Performance optimization

Performance optimization

Scalable backend services

Scalable backend services

Frontend

React

React

JavaScript

JavaScript

TypeScript

TypeScript

HTML5

HTML5

CSS

CSS

SASS

SASS

Databases

PostgreSQL

PostgreSQL

MySQL

MySQL

SQLite

SQLite

MongoDB

MongoDB

SQL query optimization

SQL query optimization

Caching strategies

Caching strategies

Tools and Others

Git

Git

Docker

Docker

Linux

Linux

CI/CD

CI/CD

Environment configuration

Environment configuration

Nginx

Nginx

AWS

AWS

GCP

GCP

Ansible

Ansible

Kubernetes

Kubernetes

Terraform

Terraform

Grafana

Grafana

Need a backend engineer for your project?

Let's talk

Client feedback

What clients say about working with me

Clear communication and fast support across two automation projects. Understood the business context and delivered a solution that has been running flawlessly for months.

Karolservice industry

Great communication, clear technical explanations, and fast delivery. Doesn't just code - actively suggests better approaches and keeps quality high.

Bartłomiejproduct management

The service description actually matched the delivered work, which doesn't happen often. A competent person in the right place who shares knowledge and guidance. Satisfaction that leads to coming back for the next project!

Agnieszkadatabase project

Professional approach, strong PostgreSQL and Django skills. Delivered optimizations that cut API response time by over 60%.

Michałbackend optimization

We hired for SaaS backend architecture and implementation. Delivered a modular system with Stripe payments that worked on production from day one.

Wojtektech startup

Automated a critical operations process that used to take the team several hours daily. Now it runs in the background with full dashboard visibility.

Arkadiuszoperations sector

FAQ

Quick answers before we talk

I focus on Python and Django backend development: architecture, integrations, performance, and delivery support.

Contact

Tell me what you are building

Share your product context, current challenges, and expected outcomes. I will reply with concrete next steps.