Desktop app for tracking employee working hours

Our company runs several teams that work in overlapping shifts, and today we count hours by hand in spreadsheets. It is slow, mistakes creep in, and at the end of the month nobody can say for sure how much time each person actually spent at work. We are looking for a developer who can build a desktop application for Windows that lets an employee start and finish a shift, mark breaks, and see a clean summary of the day and the week.

The application should store data locally in an embedded database and let an administrator open a separate view with all employees at once. We want filters by person, by team and by date range, plus totals for regular hours, overtime and paused time. A payroll accountant must be able to export any report to CSV or a simple spreadsheet so the numbers flow into our existing process without retyping. Reliability matters more than visual polish: the app should keep working if the network drops and sync later.

Please describe similar projects you have delivered, the stack you propose, and how you handle time zones and manual corrections. We value a clear interface an ordinary worker can use without training. Milestones, a short demo after the first two weeks and honest estimates are important to us.