SaaS · KSeF
KSeF Control Desk
A dashboard for accounting offices that shows at a glance who is blocking KSeF settlements. A dark, dense interface built for daily invoice work.
Online soon
Websites, apps and AI automation for businesses.
I’m Michał Mańka, a software developer in Poland. I design, code and ship it myself.
- Remote, in Poland and abroad
- Reply in 24 h, quote in 48 h
- +48 575 885 101
The work I deliver myself.
I handle each of these areas on my own. When a project combines a website, an app and automation, nobody hands it over between companies.
Websites and online stores
Fast company sites, landing pages and stores in React and Next.js. Technical SEO and speed built for Core Web Vitals from day one.
Mobile and web apps
Apps for iOS, Android and PWA, including AI that runs directly on the phone. I take care of publishing to the App Store and Google Play.
AI automation and integrations
Chatbots, AI agents and automations in n8n, Make or custom code. I connect OpenAI, Claude and Gemini models to your store, CRM, inbox and documents.
Custom software and IT support
Dashboards, APIs and databases built around how your company works. Plus computer and software setup and day-to-day help, remote or on site in Silesia.
An invoice arrives. The rest runs itself.
Since 2026, supplier invoices in Poland come through KSeF, the national e-invoicing system, as XML files in the FA(3) structure. Nobody has to retype them; they only have to be read. Here is an example of an automation I build for companies.
File from KSeF, excerpt
P_2 is the supplier’s own invoice number. KSeF assigns its own number and sends it separately: they are two different numbers.
KSeF deadlines: the largest issuers from 1 February 2026, everyone else from 1 April 2026, the smallest (sales up to PLN 10,000 a month) from 1 January 2027.
Row in your cost sheet
- Tax ID (NIP)
Podmiot1/NIP - 1111111111
- Supplier
Podmiot1/Nazwa - Przykładowy Soft sp. z o.o.
- Issue date
P_1 - 22 Sep 2026
- Invoice number
P_2 - FV/2026/09/114
- Gross amount
P_15 - PLN 1,845.00
- Category
P_7(set by a language model) - Software
Amount check Last 3 invoices from this tax ID: PLN 615.00, PLN 615.00 and PLN 615.00, average PLN 615.00. This one: PLN 1,845.00, 3.0× the average. Above the 1.5× threshold: the invoice waits for review and you get a notification.
Every 15 minutes the flow asks KSeF for new cost invoices, reads them exactly as above, adds the row to your spreadsheet or CRM and only speaks up when something is out of the ordinary.
Documents are in your system minutes after they are issued, not whenever somebody finds time to retype them.
This is an example. I design every automation around the tools you already use: email, spreadsheets, CRM or your store. More automation examples KSeF integrations
Look under the microscope.
Real projects and their real screens: recordings of them running and full-page captures. Open any of them to browse it in full.
App · AI
SomaScope
The site of a fitness app that analyses your physique with AI on the phone, without sending photos to a server. Bold design built to drive installs.
SaaS · Tenders
SterBid
A SaaS site for manufacturers: SterBid reads the specifications of BZP and TED tenders, points out clauses with no parameters and drafts a question to the buyer. An interactive 3D scene shows it on three products you can switch between.
Online soon
A fixed price before I write a line.
This is how working together looks, from the first call to support after launch. After every stage you know what you got and what comes next.
A conversation
Free, 30 minutes
You describe the problem. I ask about your processes, data and budget, then tell you plainly whether and how I can help.
A written quote
Within 48 h, fixed price
Within 48 h of our call you get the scope, a timeline with milestones and a fixed price in writing. You know the full cost before we start.
Built in stages
From 1 to 12 weeks
I show progress as I go, so changes are caught early instead of after delivery.
Launch and support
For as long as you need
I launch the project and hand over the code, the repository and the copyright. I stay on call when something needs fixing or extending.
- B2B contract and VAT invoice
- NDA on request
- Full code ownership
- Support after launch
Measure this site.
Before handover I measure every site across four Lighthouse areas: performance, accessibility, best practices and SEO. This one passes the same test. Run it through PageSpeed Insights; the result takes a few seconds.
Check in PageSpeed Insights| Performance | Accessibility | Best practices | SEO | |
|---|---|---|---|---|
| Mobile | 100/100 | 100/100 | 100/100 | 100/100 |
| Desktop | 100/100 | 100/100 | 100/100 | 100/100 |
FCP 0.9 s first content
LCP 1.3 s largest element
Google’s threshold: 2.5 s
Layout shift (CLS): 0. Lighthouse 13.5.0, emulated Moto G Power on slow 4G, 13 Oct 2026. The line draws in the measured time.
Lab scores can move a few points depending on the load on the test servers. What Google uses are Core Web Vitals from real traffic.
You talk to the person who writes the code.
I’ve been into computers since I was a kid, out of passion rather than by accident. I’m a trained IT technician and I run MankaSoft as a one-person company in Tychy, Poland. I build things that can be maintained: clean code, documentation and no lock-in to me. We meet online, or at your company if you’re nearby.
I’m pragmatic about AI. Where a cloud model is enough, I use OpenAI, Claude or Gemini. Where the data is sensitive, like the body photos in SomaScope, I process it locally, on the user’s device.
- Every project handled personally, one contact from start to launch
- Creator of SomaScope: computer vision running on the phone (App Store and Google Play)
- React, Next.js, Node.js, Python, iOS and Android, AI automation
The questions I hear most.
Short and to the point about how working together looks.
Your question isn’t here? Ask me directly
How much does a website or app cost?
A brochure site starts at PLN 2,500 net (PLN 3,075 gross), a company site at PLN 4,500 and a store at PLN 8,500 net. Automations start at PLN 1,500, chatbots at PLN 2,500, B2B systems at PLN 10,000 and mobile apps at PLN 15,000 net. You get the fixed price in writing within 48 h of a free call. Everything is on the pricing page.
How long does it take?
A brochure site is usually delivered in 2–4 weeks, larger sites and mobile apps in 6–12 weeks. An automation or AI chatbot often takes 1–3 weeks. After a needs analysis I give you a concrete timeline with milestones.
Will I own the code?
Yes. Once settled, you get 100% of the copyright and full repository access. I never lock you in; the project is yours.
How do we start?
With a free 30-minute consultation. You describe the idea, I propose a solution, and within 48 h you get a written fixed-price quote. Then design, delivery in stages, testing and launch, with direct contact with me at every step.
Do you sign a contract and NDA?
Yes. I work B2B as a sole proprietor, issue VAT invoices and sign a non-disclosure agreement (NDA) on request before any project details are discussed.
What happens after launch?
I don’t disappear at go-live. I offer technical support, fixes, hosting and further development for as long as you need.
Guides from the workshop.
Longer answers to the questions that come up in quotes: what AI implementation costs, a chatbot or an AI agent, when AI belongs on the phone. Every number has a source.
What should I build for you?
Tell me what you want to build or what slows you down. I usually reply the same day, within 24 h at the latest. After a free 30-minute call you get a written fixed-price quote within 48 h.
Prefer skipping the form?
+48 575 885 101m.manka@mankasoft.comWorking hours: Mon–Sat 9:00–17:00, Polish time.