Python, React, and VR Developer in Warsaw, Poland

A React and React Native set of applications with the Lambda back end. I joined in revamping their approach to using computer vision for better data processing. I developed a new approach to text recognition that used domain knowledge to improve the speed of recognition by 10x, cut the Lambda costs by ten due to better memory management, and reworked the flow of the app in React Native to better leverage the new approach. I also added new services for better data processing, ensuring it did not affect existing vital pieces of infrastructure. I also developed native mobile MVP applications to consume Apple Vision and Google ML Kit, which helped drive the business decision of the direction of the next version of the mobile React Native app. For the ongoing work, I used Python for quick vision research, allowing us to iterate quickly.

I worked on a VR project used in optometrist offices, with medical approval from the FDA.
My tasks included:
• Simulate eye testing equipment using Pico G2 4K and Neo2 devices.
• Implement a custom streaming solution using Azure and highly compressed textures, allowing doctors live monitoring of patient performance and potential issues.
• Refactor legacy codebase to the newest Unity version and simplify architecture to allow for faster project iterations.
• Design features to allow usage in high-latency, low-throughout rural offices with bad connectivity while prioritizing patient experience.
• Introduce better remote working practices and better code practices, modern CSV workflows, and test coverage that helped lower a number of issues introduced in the new features.

I joined the team as a Unity developer to help with synthetic data generation that is used for training highly specializes neural networks. Over the course of employment, I helped with both data generation that helped train the network which was both vastly faster, and getting better results than non-synthetic networks trained only on manually labeled data. I've also helped with edge deployment, helping create pipelines and plugins for Xavier devices, contributing to workflow and performance improvement.

An augmented reality app for the mining industry. Using a cross-platform Unity stack, the application displays mining and research information on top of a video feed acquired from the phone's camera. Paired with GPS coordinates, it allows the user to experience research data, like locations of rare minerals on a mining site, in a new way.

As a Unity developer, I joined the project to take it from a polished prototype to a fully finished and released application. Tasks included user-facing features like redesigning UI, implementing features for cloud sync and smart local scans, and cross-platform tasks (initially, the app was Android only) to implement new data structures to display on the app.

The app is live and used by clients every day.

As part of the animal maintenance, I helped create a React app that helps animal owners to track their animals' diets. The app required a specialized display of graphs and proper UX to handle an abundance of information.

I built a sample React Native application that can read JSON files with notes from the books. The goal of the application is to show the customer what can be achieved under a very tight time budget. The deadline was 15 hours, and the app highlights what can be achieved in that time and what should be cut out. The end result is a perfectly working MVP that can be used to test the potential market fit.

Joined the team as a senior developer, and over time took the role of team lead and project manager. Was responsible for the initial game design, estimating and splitting the project into tasks, and ensuring the quality of completed tickets. Introduced more Agile workflow, taught mid- and junior-level developers about a better creation pipeline. Researched assets, possible plugins, and server side implementation. Created a draft of network protocols and possible solutions for anti-hacking measures.

As a part of a four-day Game Jam, together with one designer and one artist, we created a full, working MVP of a game that was an example of a collect/run game but with a twist.

The game was constantly progressing, with an ultimate goal at the end. You travel from Earth to the Moon with certain rules. Until halfway through, you had to avoid obstacles and gather boosts. After the halfway point, you needed to stop getting boosts or you'd come in too fast.

The game used Unity and 2D graphics, together with free sound effects, and contained a completed, fully playable application made in the span of four days.

As part of the front-end team, I implemented various new functionalities, including implementing third-party APIs and libraries and extending existing frameworks. I also updated the server side when necessary.

A web-based Solitare MVP with custom rules and an IAP idea.

As a developer, I helped the client define the MVP, what is good for the basic version vs. future updates, which UX to implement, and how to work with the best, most efficient rules implementation.

The project was based on Node.js, using server-side logic to validate the movements and a replay feature that allowed steps back and forth in the gameplay. The communication with the clients happened over secure WebSockets, discouraging tampering and cheating. For additional safety, the server sends only relevant data without the full stack of the game.

I was hired as a contractor to take a project from initial JPG mockups to the working site under a tight deadline. The web page accompanied the release of the iOS application and was scheduled to go live at the same time.

I worked very closely with the designer and customer and provided a very fast feedback loop that allowed us to ship the final version of the site on time.

The website used the latest Ruby on Rails with Google Maps v3 integration and a Parse back end for storing data.

I created this iOS game as part of a weekend game jam.

The game was a native iOS application, using SpriteKit as a base for the game and a multi-peer connectivity framework (thus iOS only) for communication. The basic idea was to use it as a local app, without the need to access the internet, allowing play-testing when commuting.

The project took two days, including creating pixel-art graphic assets and implementing sound effects and a simple menu. The end result was a fully playable version allowing two players to compete over WiFi/Bluetooth connections.

As a part of Game Jam, I created a simple 2D mobile game with two different kinds of input. One requires you to whistle at a certain frequency to get a hit, while the other allows you to do a punch-like motion. The game used Unity and mobile as input (microphone + gyro), with the server being a standalone app that displays the result of the fight.

An online to offline database of marine life, with data and assets gathered from open sources. The goal was to build an app that can be used in the low-internet scenarios, like island or boats.

The technologies used were Cordova for the first version of the application and Ruby-based data gathered during the build phase. The challenges were with the speed of the application with a full dataset (total app size was 4.5GB with all images and map files).

The app was used internally and thus not released on the App Store.

I worked as a Toptal contractor and helped the client go from the initial idea of a web service to a fully working MVP shown to potential customers. After the initial feedback, I provided the client with a native iOS application that could provide a better UX. The technologies used included Ruby on Rails 4 with a bootstrapped layout for clean UI, mobile-first design, Google Maps v3 integration, and Geolocation services in a browser. For the iOS application, I used native code for the simplicity and speed of the MVP.

Responsible for maintaining the game server as part of the live team to ensure a smooth user experience. I monitored and tracked issues and responded to ongoing issues 24h a day. I debugged issues with database queries and designed better features and communication protocols between the mobile game and the back end. I also ensured cheating attempts were caught, monitored, and resolved.

I implemented the mobile front-end for a Windows application, ensuring memory usage for massive amounts of data. I focused on security as the app displayed sensitive and valuable information.

As a part of the inherited project, our team was responsible for maintaining the current codebase and developing new features. The project consisted of ten books, with each book having correlated "missions," which were small Flash/Flex games. Responsibilities included creating apps from wireframes until the final product.

An inherited custom-engine-based PHP project. Responsibilities included updating the old, unmanaged codebase, moving toward PHP 5, adding SEO-friendly URLs, and rewriting categorization structures.

A .NET based app that aims to provide users with an easy and fast way of exchanging knowledge. Part of the task included making sure the current version was stable and fast while adding new extended features, like branded subdomains.

An open-source, handmade Vue-based front end for Paperless (Django app). The app is released as a separate app that consumes Paperless API, thanks to which we can avoid changing the original codebase until the new front-end is fully functional. The app is built with Vue 2, Vuetify.js, and Vue-Router and follows an Agile approach of starting with a minimal product and building on top of it.