Hi there, I’m Marcin 👋

Product-oriented full-stack developer

As a freelancer, I help organisations build web applications, from the ideas to Marketable Products in ​​the Build-Measure-Learn model.

Let's talk
Picture of Marcin Ślęzak with a low-profile mechanical keyboard

ON THE SOFTWARE HOUSE SIDE, CLIENT SIDE OR AS A FREELANCER

… and some others 🙊

End to end web software development

I’m more than happy to cover the whole process of building the web product, from understanding your idea to application design, implementation, testing, launch and maintenance. Working with me, you don’t need anyone else, literally.

Business perspective

Over 12 years, I saw good practices and mistakes made in e-commerce, e-learning, two-sided marketplace, and data visualisation web applications. I bring my experience from the corporate and startup worlds so I can help you validate your ideas, generate new ones and avoid common mistakes.

Do not build the product from scratch

Nowadays, we can take advantage of existing SaaS products and integrate them to get the application completed much faster than building everything from scratch.

Chargebee
Storyblok
Webflow
Conterntful
Stripe
Mailchimp
Intercom
Salesforce
Zendesk
Analytics
Calendly
Make
Zappier
Vocuherify

Launch faster and cheaper

Building a team from scratch is time consuming and expensive process. As a one-man band, I’m like a quick reaction force that allows you to start building your web application faster and cheaper than a team.

Pause or cancel anytime

It’s hard to fit new product uncertainty into corporate contracts. You can pause or cancel projects anytime - no surprises or tricks. You pay only for the hours that I work for you.

No vendor lock-in.

You may want to build your own team at some point, and it’s something that I’m more than happy to help you with by suitable handover and supporting technical positions recruitment. I hired 40 software developers, and no bad hires so far 🤞.

Tools

I have battle-tested experience with modern technologies that will support rapid development at the beginning and make it easier to hand over the project to other developers (of course, if you decide to do so 😎).

TypeScript
JavaScrip
Node
React
NestJs
NextJs
Storybook
Sass
MUI
Formik
AWS
Heroku
Jest
Cypress
Nx Tools
GIT
Bull
PosgreSQL
Prisma
Redis