Developed two products in parallel: Android POS app and All-in-One PC for cafes/bars/restaurants.As a member of the Android team:• Based on market demand, integrated new types of devices (acquiring and receipt printers), which allowed the company to work with new customers and product application scenarios;• Integrated an Android POS terminal using a third-party company API. It reached about 5,000 additional potential customers;• Developed high-level libraries for working with devices of the same type, which increased the speed of product development;• Rewrote application drivers from Java to Kotlin to work with external devices;• Developed: utilities for working with TLV mapping and data structures based on current fiscal laws; universal converter of receipts and acquiring slips for check tape of different width for various devices.In the hardware department:• Developed firmware for the All-in-One PC test bench, reducing the time needed to test hypotheses and technical solutions by 20%;• Created technical tasks for outsourcing teams;• Interacted with Chinese factories: developed technical documentation, tested finished products, advanced components to serial production.

I participated in the development of an interactive museum exhibition for the Moscow Planetarium.During the project:• Developed a device used in more than 90% of all designed systems and wrote a driver for it. This saved resources for development of each exhibit;• Successfully integrated industrial hardware (motor controllers, absolute encoders, stepper motors) to provide stable solutions that do not require frequent service;• Worked on the full cycle of several device designs: component search → hypothesis validation and prototyping → circuit design → PCB tracing → documentation generation → assembly and sample testing;• Developed firmware for interaction of control devices with other system units (stepper motor controllers; discrete signal input/output devices; indication devices).I debugged and assembled systems, assisted with on-site commissioning and presented solutions to customers.

I participated in the development of benches for automated functional and electrical testing of mass-produced devices.• Developed firmware for serial product verification devices, which increased the speed of engineers' work on the production line by several times.Worked with standard peripherals (UART, I2C, RS-485, ADC, DMA) and components (EEPROM, relay outputs, current measuring resistors, etc.). Wrote documentation for code. Worked with measuring equipment, soldering.

Taught preschool and school-age children.The program of classes included: the basics of logic, mathematics, mechanics; the basics of project activities and public speaking.• I graduated 42 students, 5 of them became winners of regional competitions in sport robotics;