I help businesses build, fix and improve software — from backend systems and integrations to AI-powered features and complete applications.
Senior software engineering from $95/hour.
Tell me about your project →You don't need to know which technology or solution you need. Start with the problem.
Is an existing application becoming slow, difficult to maintain or increasingly expensive to change?
I can help investigate performance problems, fix difficult issues, refactor problematic areas and improve existing .NET, Java and database-driven systems.
Need reliable backend functionality for an existing or new product?
I work with APIs, databases, business logic, authentication, background processing and other server-side functionality, with extensive experience in C#/.NET and Java.
Want to use AI inside a real product or business process rather than build another prototype?
I can help with LLM integration, structured generation, grounded research, validation, evaluation, automated workflows and production AI pipelines.
Need different systems to reliably talk to each other?
I have worked with REST and SOAP APIs, webhooks, payment systems, message queues, external services and complex enterprise integrations.
Sometimes the right solution doesn't exist off the shelf.
I can design and build custom applications and internal tools around specific business processes and requirements.
Have an idea that needs to become working software?
I have independently taken products from architecture and UX through implementation, payments, email, analytics, deployment and production operation.
Core experience
C#/.NET · Java · SQL · APIs & Integrations · Node.js · TypeScript · LLM Systems · AWS
Banking and trading
On a banking and trading system, I worked on a data-intensive application view that took several minutes to load. After analyzing how the data was being processed, I redesigned part of the processing and caching approach, reducing the load time to near-instant.
Insurance
For an insurance platform, I worked on integrations connecting business processes with external systems using REST, SOAP, WCF and asynchronous messaging, including bidirectional data flows and callback confirmation.
Own product
For one of my own products, I built a multi-stage LLM pipeline covering grounded research, structured data generation, validation, scoring, content generation, localization and publishing. The system combines LLM evaluation with deterministic validation rather than trusting model output alone.
Online products
I have independently built and operated online products covering architecture, backend development, databases, payments, booking workflows, transactional email, analytics, deployment and ongoing production operation.
No fixed-price guessing
$95/hour
Software work often becomes clearer once you start working with the actual system, codebase and requirements.
That's why I primarily work on an hourly basis instead of trying to predict every requirement, edge case and acceptance criterion before the work begins.
You'll know what I'm working on and you'll stay in control of how much time is spent.
Michal Mihálik
Senior Software Engineer
20 years
Software engineering
Enterprise + product
Banking, trading, insurance, logistics + own products
Backend → AI
C#/.NET · Java · APIs · LLM systems
Over the years I've worked both independently and as part of international teams — from analyzing requirements and designing solutions to implementation, testing, deployment and production support.
I prefer pragmatic engineering: understand the actual problem first, then use the level of technical complexity the problem really requires.
Whether you're trying to fix an existing system, build something new, integrate different services or introduce AI into a real product, tell me what you're trying to accomplish.
I'll personally review your request and let you know if I believe I can help.
Senior software engineering from $95/hour.
Tell me about your project →