John Kosinski Email & Phone Number

Hamza, the World's First DeCom Marketplace: https://hamza.markethttps://blog.hamza.market

- Architected and developed a dApp, one of the first of its kind, that allows users to buy into a US Treasury Bond fund on the blockchain. Launched on BSC and Ethereum blockchains. Won the race to market before competitors.- Architected and developed a secure off-chain system to automate vault sweeps and other processes related to the Treasury Bond vault systems.- Conducted technical research to assess the feasibility of various potential automated hedge fund strategies in the blockchain space.- Implemented rigorous testing and security for on-chain blockchain products.

- Planned and estimated project packages for non-fungible and fungible token development, front-end minting and administration websites with React, and security audits of smart contracts.- Researched, planned, and presented the integration of fungible and non-fungible tokens with the Unity game engine back end of a well-known online meeting venue.- Contacted, vetted, and interviewed blockchain developers, laying the foundations for an elite international team of blockchain warriors.- Developed, planned, and documented a methodology for security audits of smart contracts.Provided expert technical consultation during sales meetings.

- Ported the Typescript SDK for well-known Solana market maker Orca Whirlpools to C#/.NET for use in Unity Game Engine and made it open for community usage. - Developed the SDK for .NET, refactored as necessary, and added a suite of automated tests to ensure its quality.

Irvine, California, Us

- Resolved customer and in-house defects in the software's main back-end C++ engine, using C++ 11 on both Windows and Linux platforms.- Developed new features for the software's main back-end C++ engine, using C++ 11 on both Windows and Linux platforms as part of a team of developers.- Fixed some of the most long-standing and challenging defects in the software; thoroughly documented the root causes and implemented testing to prevent recurrence.- Managed the defect lifecycle, interfacing with other teams for information and assistance when needed.

- Developed ESP8266 and ESP32 hardware prototype for a unique and proprietary hospital emergency room communications system. The prototype included IR, wifi, and RFID chip scanner. - Architected and developed embedded networked software for the ESP32/ESP8266 for the hardware prototype, with Arduino and RTOS in C, interacting with wifi, IR, and RFID readers. - Researched and made decisions and tradeoffs regarding software and hardware requirements, working closely with the client to meet their needs.

Client provides home lighting automation systems, solutions and applications. Worked remotely from Chiang Mai, TH.Platforms: AWS IoT, ESP8266, Arduino IDE, Amazon Alexa, MQTT, WebSocketsLanguages: Embedded C/C++ Final goal of the application is to bring the company’s existing lighting/dimming system into the world of IoT/SmartHome by connecting it to voice activation using an Amazon Alexa device (Echo, Dot, etc.) I have programmed the ESP8266 chip on the Arduino IDE, connected it on one end to Amazon’s IoT cloud, and on the other end to the existing lighting chips via RS485 and IR signals. Since reliable and well-tested TLSv1.2 libraries do not yet exist for ESP8266, securing the communication with AWS is a special challenge.

Sydney, New South Wales, Au

- Developed from scratch a Xamarin iOS application that controls large-scale SCADA irrigation systems via a Java middle tier.- Built the MVP's architecture and prepared a plan to facilitate cross-platform ports.- Created a tight system of synchronizing long-running tasks with the server side across multiple connections or app sessions.

Developed and published an Alexa skill that queries sports news for New York sports teams, and serves the results as audio and/or video. Includes administrative back-end.

Worked remotely to make some improvements and expansions to widely used stock analysis software. Improvements include improvements to analysis algorithms, and connection to new data sources.

New York, Ny, Us

Worked as part of an excellent team to develop a Webby-award winning IOS e-commerce application in Xamarin/IOS.

New York, Ny, Us