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Mariusz S. AI, iOS and Swift Platforms

My name is Mariusz S. and I have over 1 years of experience in the tech industry. I specialize in the following technologies: AI Chatbot, ChatGPT API, ChatGPT, OpenAI API, Vector Embedding, etc.. I hold a degree in , Bachelor's degree, Master's degree. Some of the notable projects I’ve worked on include: AI Weather Agent. Smart Activity Ideas, Based on Weather and Location., Stock Predictions. AI-Powered Market reports., AI Movie Finder Concept App. Smart Search Built on Meaning., ChatGPT Demo App, Apple HealthKit Demo, etc.. I am based in Nuernberg, Germany. I've successfully completed 7 projects while developing at Softaims.

My expertise lies in deeply understanding and optimizing solution performance. I have a proven ability to profile systems, analyze data access methods, and implement caching strategies that dramatically reduce latency and improve responsiveness under load. I turn slow systems into high-speed performers.

I focus on writing highly efficient, clean, and well-documented code that minimizes resource consumption without sacrificing functionality. This dedication to efficiency is how I contribute measurable value to Softaims’ clients by reducing infrastructure costs and improving user satisfaction.

I approach every project with a critical eye for potential bottlenecks, proactively designing systems that are efficient from the ground up. I am committed to delivering software that sets the standard for speed and reliability.

Main technologies

  • AI, iOS and Swift Platforms

    1 year

  • AI Chatbot

    1 Year

  • ChatGPT API

    1 Year

  • ChatGPT

    1 Year

Additional skills

  • AI Chatbot
  • ChatGPT API
  • ChatGPT
  • OpenAI API
  • Vector Embedding
  • Vector Database
  • AI Mobile App Development
  • iOS
  • Swift
  • Supabase
  • Firebase
  • In-App Purchases
  • API Integration
  • SwiftUI

Direct hire

Potentially possible

Previous Company

Siemens

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Experience Highlights

AI Weather Agent. Smart Activity Ideas, Based on Weather and Location.

A concept iOS app that shows how an AI agent can combine weather and location to suggest activity ideas. While the location and weather data are currently fixed, the structure is ready to plug in live data from the user’s device or external APIs. The app demonstrates how AI agents can reason and act based on context. It uses a method called ReAct (Reasoning + Acting) — where the AI thinks through a task before deciding which tools or information to use. It showcases OpenAI Functions, which allow the app to tell the AI how to use specific features (like checking the weather) automatically.

Stock Predictions. AI-Powered Market reports.

An iOS concept app that demonstrates how generative AI can support investment research and decision-making. Users enter a stock ticker, and the app retrieves recent market data using Polygon.io API, then prompts ChatGPT to generate a concise performance summary based on the past trading data. It explores key AI techniques such as temperature, few-shot prompting, and response control (presence and frequency penalties, stop sequence). The app explores also safety measures to prevent prompt prompt injections. API handling is offloaded to a secure Cloudflare worker to ensure data protection.

AI Movie Finder Concept App. Smart Search Built on Meaning.

This concept iOS app shows how AI can power smarter, more intuitive search experiences. Instead of relying on keywords, users describe what they’re in the mood for, and get relevant movie suggestions based on meaning. Under the hood, the app uses semantic search — an AI technique that understands relationships between ideas in natural language. It compares user input to a database of film descriptions using text embeddings, and returns the closest matches. It also uses retrieval-augmented generation (RAG), a technique where the AI pulls relevant background info before forming a response.

ChatGPT Demo App

This demo app demonstrates OpenAI API integration. It uses the gpt-4o-mini model. The app leverages system messages so that it works as a music assistant that knows only baroque music. Tech stack: Swift, SwiftUI, OpenAI API, Alamofire, handling API Keys

Apple HealthKit Demo

It's a demo project illustrating the power of HealthKit combined with Charts. This demo app uses user's health data to display compelling charts that support progress tracking and visualize statistics. You're welcome to take a look on its linked repository. Tech stack: SwiftUI, Swift, HealthKit, AppleXcode, Swift Algorithms, Git, GitHub. Disclaimer: the project has potential for refactoring, but I intentionally decided to leave it like that for now. If you have any questions I'm happy to chat.

Education

  • AGH University of Science and Technology

    in Computer science

    2014-01-01-2015-01-01

  • Kozminski University

    Bachelor's degree in

    2011-01-01-2012-01-01

  • University of Silesia

    Master's degree in

    2004-01-01-2009-01-01

Languages

  • German
  • English
  • Polish