• Wrote the business plan and technical discription for Skinroutine.
• Hired talents for development.
• Created the initial MVP (Minimum Viable Product) sitemap for SkinRoutine.

• Front-End : Flutter
• Back-End : Python, Django-rest-framework, MySQL
• Hosting : AWS lightsail

• Created an API for implementing JWT token-based login and registration, including email verification
• Developed of APIs for user withdrawal and password change.
• Constructed APIs for the uploading and deletion of individual photos..
• Established CI/CD using Jenkins, Docker, and Git Actions.
• Crafted APIs for user account withdrawal and password modification.
• Implemented API views utilizing TensorFlow to mimic before and after images of dermatological procedures, leveraging a model to extract post-procedure images

• Developed every UI elements based on figma design provided by designer.
• Implimented push notification capabilities for user routines.
• Developed automatic camera shoot calculating the angles and distance of users from camera with AR Core depth API.
• Integrated user events with google analytics.

• As team leader, I led weekly meetings, sprints, and monitored team members' task progress regularly.
• Drafted the Privacy Policy and Terms of Service for Skin Routine service through mentoring from a lawyer and reference materials.
• Utilized Google Analytics to track various metrics linked to retention and frontend events, and based on this data, proceeding with sprints.

• Continuously improved the product through strategically planning and executing steady hypothesis tests.
• Regularly monitored references and competing services, conducted SWOT analyses for each business, and formulated business strategies derived on them.

• Given the instruction to create a simple shooting game for crypto community users, I learned Unity and planned the game, drawing inspiration from straightforward control games like Flappy Bird and Cookie Run, while excluding detailed designs.

• Front-End : Unity 2D, React
• Back-End : MySQL. Django
• Hosting : AWS EC2

• Responsible for Unity side development, including adding attributes and developing various items.

Example of some items:

• Bomb item: Destroys all objects visible on the screen.
• Attack speed increase item: Increases the firing speed of bullets.
• Stamina recovery item: Increases stamina by 1 (prohibited if exceeds 3).
• Invincibility item: Becomes invincible and enlarges for 10 seconds, destroying any contacted objects.
• Shrinking item: Decreases the player's size gradually to increase evasion rate (increases by 2 levels upon death).
• Weapon enhancement item: Increases weapon damage by 1 level (changes bullet size and type).

• Addressed performance issues on low-spec devices.

• Diagnosed and fixed frame drop issues on low-performance devices when many objects appeared and bullet firing speed increased. Identified and corrected inefficient code using performance checking tools (e.g., switching from if/else statements to switch case statements).

• Developed proprietary NFTs and user-specific items for holders, integrating them by extracting JSON-formatted NFT attributes stored in sessionStorage.
• Implemented encryption/decryption algorithms for sensitive information-related API calls using key values for communication.
• Continuous updates (adding items, changing images).
• Designed API workflow and requested backend developers for implementation.