Web and app development
I work on interfaces, APIs and databases. Depending on the task, I use tools such as Python, TypeScript, React, Kotlin or C#.
Open to full-time roles and freelance projects
Poser.pySoftware developmentfor web and apps
I’m Nico Poser, also known online as Poser.py. Based in Haan, Germany, I develop web applications and apps for Android and Windows. Here you can explore my projects and learn how I work.
- Microsoft Store
- Google Play
- agenticcoding.company
poser@agenticcoding: ~/portfolio
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5Portfolio projectsLearning tools, apps and web
3PlatformsWindows, Android, Web
5Dedicated domainsLinks to the projects
11Learning languagesin Leyla’s Code
About me
Hi, I’m Nico.
I work on my own software projects under the name Poser.py. I’m interested in turning an idea into an application people can understand: with a clear interface, a reliable technical foundation and room for improvement. My projects range from a Python learning platform to an app for care workers.
Releases and updates
Development also involves installation, deployment and updates. I take the requirements of browsers, Android and Windows into account.
Multilingual applications
Languages are an important part of my learning projects. I work on translatable interfaces and ways to maintain content in several languages.
Ongoing maintenance
Work continues after the first version: fixing bugs, listening to feedback and improving features. Some projects also involve subscriptions and payment flows.
PythonTypeScriptC# / .NETKotlinJavaScriptNext.jsReactAndroidWindows-AppsNode.jsSQLiteREST-APIsLLM AgentsTailwind CSSi18n · MehrsprachigkeitCI/CDPythonTypeScriptC# / .NETKotlinJavaScriptNext.jsReactAndroidWindows-AppsNode.jsSQLiteREST-APIsLLM AgentsTailwind CSSi18n · MehrsprachigkeitCI/CD
Portfolio
A closer look at my projects
These projects cover different parts of my development work. Follow the links to their websites or developer profiles, or use the filters to browse by platform.
EdTech · Web-AppSpotlight
Live · 2025Leyla's Code
Learn Python step by step in your browser
A free introduction to Python. Across 30 missions, learners can write and try code directly in the browser. Feedback and saved progress support learning, with content available in several languages.
- Browser-App
- Gamification
- 11 Sprachen
- Python-Kurs
EdTech · PflegeSpotlight
Beta · 2025Pflegestart
Learn care skills alongside German
Pflegestart combines learning materials for care professions with German practice. Chapters, multilingual flashcards and the learning assistant Tabbi support revision. The project is in beta; visit its website for the current offering.
- Android
- Windows
- Browser-App
- 6 Sprachen
- +1
Android · Security
Live · 2025STALKERWARE
An Android device management project
A project for managing Android devices. Its website describes the features and intended uses. Use requires the necessary authorisation and respect for the rights of the people affected.
- Android
- Device management
Tools · MediaSpotlight
Live · 2025YouTube Poser
Organise video and audio files
A tool for video and audio downloads with a queue and media library. It supports several file formats and playlist processing. The project website describes its features and the available versions.
- MP4 · 1080p
- MP3/WAV/FLAC
- Playlist-Import
- Live-Telemetrie
- +1
Web · Portfolio
Live · 2026AgenticCoding.company
My portfolio, built with Next.js and TypeScript
This website introduces my work and brings together links to my projects. It uses Next.js, TypeScript and Tailwind CSS, with German and English content and a contact form.
- Next.js 16
- TypeScript
- Tailwind CSS
- Framer Motion
- +1
External links open in a new tab. Store links lead to the developer profile.
Project links
Websites and developer profiles
Find my project websites and profiles on the Microsoft Store and Google Play. The individual project sites provide details about features, platforms and availability.
Project websites
- agenticcoding.companyNico Poser’s portfolioLive
- leylascode.comLeyla's Code — Python learning platformLive
- pflegestart.comPflegestart – care skills and German (beta)Live
- stalkerware.appSTALKERWARE — Android monitoringLive
- my-collector.comYouTube Poser — media downloaderLive
How I work
From an idea to the next version
Requirements differ from project to project. These steps help me clarify the task, try solutions and develop the application further.
- Step 01
Understand the task
First, I establish who the application is for and what it needs to do. A simple design helps us discuss the main workflows.
- Step 02
Build a first version
I implement the core features and connect the interface, APIs and data storage. A focused first version makes it easier to test assumptions early.
- Step 03
Test and refine
I check workflows on the intended devices and in the browser, paying attention to usability, error handling and technical reliability.
- Step 04
Make it available
I prepare the website or app and its supporting information for release. The right approach depends on the platform and the project.
- Step 05
Keep improving
Feedback and everyday use show where improvements are needed. These lead to bug fixes, adjustments and further features.
Working together
A few questions answered
What kind of software do you develop?
I work on web applications and apps for Android and Windows, including interfaces, APIs and databases. My projects include learning tools and applications for managing media.
Can I contact you about an existing project?
Yes. Briefly describe the application, the technologies involved and the support you need. We can then discuss whether the task is a good fit for my work.
Where are you based and what work are you looking for?
I am based in Haan, North Rhine-Westphalia, Germany, and open to a full-time role or freelance projects. We can discuss location, scope and timing together.
How should I send a project enquiry?
Use the contact form or email me. A short description, the target platform and a timeframe are helpful. You can get in touch even if the requirements are still taking shape.
Contact
Let’s talk about your plans.
Looking for help with a web application or app, or want to discuss a role? Send me a brief description of what you have in mind and your timeframe.
How to reach me
By email, phone or WhatsApp
Availability
Open to full-time roles and freelance projects
- A full-time role in a development team
- Freelance web and app projects
- Improving existing applications
$ current_status --developer
→ open to a conversation