Senior Backend Engineer | Python | Django
BUILD / SHIP / SCALE
Freelance / B2BI build Django backends, integrations, and automation for products that need to stay reliable.
I help companies clean up workflows, reduce manual work, and scale production systems. Available for freelance projects and B2B contracts.
About Me
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. I also run AiVisible.pl - an AI Visibility agency for B2B companies, where I combine backend engineering, automation, SEO, content, and language models to help brands measure and improve their visibility in AI answers.
Expertise & Value
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.
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.
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.
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.
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
The homepage shows only business-level value snapshots. Full context, delivery decisions, and outcomes are available on dedicated case study pages.
I run AiVisible.pl as a specialized agency that diagnoses, builds, and monitors B2B brand visibility in answers from ChatGPT, Gemini, Claude, and Perplexity.
Business value: Companies get a clear answer on whether AI recommends their brand, who wins the competitive shortlist, and which actions can improve visibility beyond classic SEO.
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.
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.
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.
Automated ad monitoring and real-time Discord notifications.
Business value: Faster response to relevant listing changes and lower operational load through event-based alerts.
Automated data pipeline for outbound scaling.
Business value: More qualified leads at lower operational cost and with higher data quality.
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.
Available now
Currently available 20h/week for B2B contracts in Django, LLM integrations, and GEO consulting for Polish companies.
How I can help
CASE STUDY
AiVisible.pl - AI Visibility agency for B2B companiesCompanies get a clear answer on whether AI recommends their brand, who wins the competitive shortlist, and which actions can improve visibility beyond classic SEO.ParentApp - AI assistant for parents (SaaS)Fast launch of a monetizable digital service combining expert knowledge with personalized user experience.View all case studiesI respond within 24h on business days.
How I work
I gather requirements, business goals, and constraints. I understand the context before writing the first line of code.
I design the solution, select the stack, and plan migrations. You get a proposal before work begins.
Iterative implementation with code review, testing, and CI/CD. Regular feedback and visible progress.
Monitoring, performance tuning, and documentation. I stay available after deployment.
Core Skills
Python
Django
Django REST Framework (DRF)
GraphQL
Celery
Redis
API integrations
Authentication (JWT / OAuth)
Background jobs
System design
Performance optimization
Scalable backend services
React
JavaScript
TypeScript
HTML5
CSS
SASS
PostgreSQL
MySQL
SQLite
MongoDB
SQL query optimization
Caching strategies
Git
Docker
Linux
CI/CD
Environment configuration
Nginx
AWS
GCP
Ansible
Kubernetes
Terraform
Grafana
Need a backend engineer for your project?
Let's talkClient feedback
Clear communication and fast support across two automation projects. Understood the business context and delivered a solution that has been running flawlessly for months.
Great communication, clear technical explanations, and fast delivery. Doesn't just code - actively suggests better approaches and keeps quality high.
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!
Professional approach, strong PostgreSQL and Django skills. Delivered optimizations that cut API response time by over 60%.
We hired for SaaS backend architecture and implementation. Delivered a modular system with Stripe payments that worked on production from day one.
Automated a critical operations process that used to take the team several hours daily. Now it runs in the background with full dashboard visibility.
FAQ
I focus on Python and Django backend development: architecture, integrations, performance, and delivery support.
Yes. I review your current stack, identify bottlenecks, and implement improvements for speed, stability, and scalability.
Yes. Automated testing is part of my standard development process to keep releases reliable.
It depends on scope. Smaller integrations and optimizations take 1-2 weeks. New backend module architecture typically runs 4-8 weeks. I always clarify scope and timeline upfront.
I work on a project basis (fixed scope) or hourly/sprint-based. The choice depends on how well-defined the scope is. I always agree on terms before starting work.
Yes. I work fully remote and regularly collaborate with product teams, DevOps, and other developers. I use Git, code reviews, Slack, and daily standups.
Yes. I offer post-deployment support including monitoring, quick fixes, and optimization. Terms are set individually for each project.
Yes, I am currently accepting new freelance projects and B2B contracts. Reach out via the contact form with a brief project description and I will respond within 24 hours.
Yes. I work with Polish and international clients fully remotely. I communicate in both Polish and English and adapt to different time zones.
Yes. I regularly take over existing codebases. I start with a code audit to understand the current state, identify technical debt, and plan a safe path forward.
Yes. I offer standalone code review sessions and architecture consulting engagements. These are useful before scaling a product, hiring a team, or preparing for a technical audit.
My projects span marketplace platforms, SaaS products, fintech integrations, automation pipelines, and AI-powered applications. I adapt quickly to domain-specific requirements.
Yes. I sign NDAs and work under standard B2B contract agreements. Confidentiality is a default part of my professional practice.
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