From solo founder to 150-person organizations
AI
AX
SW
Software of the people, by the people, for the people.
An engineer who defines problems, builds data pipelines, and ships full-stack software.
Aligning with team goals to measurably improve colleagues' work efficiency through technology.
Annual revenue: 2.4B to 30B KRW range
2 years in companies, 3+ years founding
From data collection & analytics to service dev & ops
Working together
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박민* (Beauty Selection)
He quickly developed notifications for upcoming paid-subscription expirations.
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김서* (Beauty Selection)
He took responsibility for completing the sales notification feature in just one week. I think it will be a great help in communicating with sellers about sales.
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박재* (Beauty Selection)
He proactively identified the issue, clarified what was needed, and proposed specific improvements.
Are you looking for this kind of engineer?
“Not just a developer who writes code against specs, but a true teammate who explores real business bottlenecks and ships with full ownership?”
CORE CAPABILITIES
4 Concrete Contributions I Bring to Your Team
Diagnosing Business Bottlenecks
Identifying real root causes for users and business stakeholders before architecting software.
Data Pipelines & Automation
Architecting scalable scraping, ETL data pipelines, and automated reporting systems.
Practitioner-First Internal Tools
Designing fast, intuitive operations consoles that eliminate friction and operational errors.
Goal-Oriented Collaboration
Fostering proactive 1-on-1 communication and respecting diverse skill sets to achieve team goals.
ENGINEERING CASE STUDIES
Representative Problem-Solving Projects
PROVEN OUTCOME
-67%
Bid review time: 30 min → 10 min
Reported by client bidding team · notice review through shortlisting
Procurement workflow system
I worked with the bidding team at Bogwang I&T to design and build a tool that reduced procurement notice review and shortlisting time from 30 to 10 minutes (about 67%). The team moved work previously handled in K-Bid into this system. Users can customize notice-list columns to suit their work. The system is in actual use, with final participation decisions left to the team.
Reported by client bidding team · notice review through shortlisting
Use status
The bidding team uses the system in its work. (As of 2026-09-14)
Problem
The bidding team at Bogwang I&T needs to review notices, identify relevant items, and decide whether to participate. I worked with the team to design and build a tool supporting this process from notice collection to participation records.
What was built
- Collected notices and revisions, retaining source and collection history.
- Compared notice item codes against item codes on registration certificates.
- Provided signed-in access to candidate notices with deadline and decision
- Recorded participation decisions, notes, and change history.
Design decisions
Code matching identifies candidates for human review. It is not treated as a complete legal eligibility check or a final decision to enter a bid.
The team's feedback changed the list view: information already resolved during screening no longer needed to be repeated in every row. Related company information was also presented more compactly.
Workflow changes
Procurement notice review and shortlisting time fell from 30 to 10 minutes. These before-and-after task times, as reported by the bidding team, represent 20 minutes saved, or about 67% less time.
The bidding team moved work previously handled in K-Bid into this system. Users can customize notice-list columns to suit their work.
Evidence
A local execution record dated 2026-09-11 contains 2,621 notices, 2,828 revision records, and 56 item-code candidates. The candidates include partial matches and two cancelled notices. These records demonstrate implementation behavior; they do not measure changes in working time or bidding outcomes after adoption.
Digital device management system
An operations console for managing iPads at Daegu Joongang High School. I handled requirements discovery, design, implementation, deployment, and operation. The console supports device edits and fault/repair records, and lets homeroom teachers view devices by grade and class without signing in. Operator changes retain verification steps.
My role
I handled requirements discovery, design, implementation, deployment, and operation across the project.
Problem
The existing Mobile Device Management (MDM) interface required inconvenient clicks and page changes for the school's device-management workflow. I built an operations console supporting device edits, replacement, fault/repair records, and classroom lookup.
What was built
- Supported device edits and replacement alongside fault/repair records.
- Made repair details editable, with in-progress and completed states.
- Let homeroom teachers view device lists by grade and class without signing in.
- Mediated upstream MDM access through the server and stored session data encrypted.
Design decisions
I removed the typed approval phrase from ordinary device edits and replacement while retaining previews, an explicit execution button, and a latest-state check before saving. Teacher lookup is separate from operator write access. Concurrent repair-record edits surface a conflict instead of silently overwriting another change.
Evidence
Release records confirm signed-out lookup on 2026-09-02 and simpler device-edit execution on 2026-09-11. These are implemented and deployed workflow changes, not measurements of operator task time or teacher adoption.
CAREER TRACK RECORD
Company & Founding Track Record
Stepup
2023.02 - Present
Founder
- Custom web and app service design, development, and operations
- Workflow automation and internal operations tooling
Delivered 10+ projects end-to-end from requirements to deployment and operations
Beauty Selection
2022.08 - 2023.02
Data Engineer
- Automated sales, customer and marketing data collection across brands
- Standardized company performance metrics and automated reporting
Cut data review across 6 brands from about 2–3 hours to under 10 minutes to support decisions
Company website
Secondhands
2021.08 - 2022.07
Data Engineer
- Built and operated used-luxury price and image collection systems
- Built datasets for AI-based product condition and grading
- Tracked customer behavior and conversions
Collected about 90,000 records and refreshed about 10,000 weekly to support market-price analysis and AI development
Company website
The IMC
2020.06 - 2020.12
Data Science Researcher
- Cleaned Daegu water-supply data for leak analysis
- Developed leak-cause analysis models and visualized results
Analyzed about 90,000 rows and identified 84% of leaks at joints, supporting inspection and facility-improvement decisions
Company websiteFrequently asked questions
What kind of company would you like to join?
I would like to join a company where we share goals and a focus on customers and users, and where I can learn alongside colleagues with different skills and domain expertise.
Why were your tenures at each company relatively short?
Before joining, I discussed my role and the team’s operating plans with the team lead. Most were teams whose plans extended through a project, offering an opportunity to put my skills to work immediately. After completing my responsibilities, I moved on when the team was dissolved. A project ending is not, in itself, my reason to leave. When I share a team’s direction and have a role to contribute, I want to stay and grow with them.
How do you adapt to a new company and domain?
I start with core business documents to understand the key customers and the company’s position in the market. Through one-on-one coffee chats, I get to know colleagues’ personalities and working styles and learn how to collaborate with them.