This project focuses on developing a severance payroll product within Flex, the all-in-one HR platform, to deliver a complete payroll service. Through automation, an optimized flow, and an intuitive UX, we made completing the settlement process 10x faster.
As a senior product designer in the payroll squad, I worked on this project from April 2022 to July 2022. I led all the design initiatives, worked with a product manager, three product engineers, a sales team and a payroll outsourcing team.
To rapidly increase ARR, we need to sell payroll, Flex's highest-priced feature per capita, to mid-enterprise businesses. They asked for full-cycle payroll, including severance payroll, but Flex wasn't offering it, which was a huge obstacle in sales.
* Severance pay is mandatory in Korea
I started by interviewing two payroll experts on the team—our main target users—about their processes to understand the severance pay settlement workflow.
Next, I interviewed more payroll experts – two from our team and three clients – to deep dive into their pain points and the reasons behind them.
Following questions
Following the interviews, I observed our team's two payroll experts running severance payroll and used contextual inquiries to further investigate the problems.
Key findings
Hypothesis
The main design challenge was speeding up settlement without disrupting the familiar user workflow. This meant understanding what builds trust, leading me to explore two directions.
Concept 1
Step-by-step
Takes time, but it's guaranteed
The concept mirrors the current workflow: select leavers, calculate gross pay, then taxes/deductions for the final amount, followed by review. This should be easy to grasp by aligning with the user's mental model.
Concept 2
Working backwards
Rapid and bold, while remaining on point
Show results first, then review individuals, unlike the current, sequential workflow. I thought this was a familiar yet disruptive approach, as it simplifies the process while reflecting the existing mental model of payroll experts who process one-by-one.
We conducted user testing with five internal users using lo-fi prototype and asked them which concept they prefer and why they like it better.
Users love Concept 2 ❤️
Iteration ideas
Flex's severance payroll reduces the previous 30-minute per-person workload to just 3 minutes by offering automated HR and payroll data collection and calculation, a UX optimized for user review and modification, and a low learning curve.
Step 1
Select
Review employees
Users can review who needs severance and any special cases.
Step 2
Review
At a glance
Users can review the overall settlement results at a glance and if there are no special cases, they can complete the settlement as is.
Individual view
A dedicated individual view focuses on a single settlement, allowing users to review details, edit values, and confirm.

Step 3
Confirm
Completing settlement
This final step summarizes the settlement and outlines what's next: emailing the statement, downloading records, and generating the bank Excel file.
* Data from the first 3 months post-launch