Soh Zheng Da
✦ Soh Zheng Da · AI automation & forward-deployed engineer · Singapore
Operations software and AI tooling that turns hours of weekly admin into minutes, often with zero backend, zero install, zero build step. The spirit behind soh simple.
Receipts on this page: ~82,000 rows costed live in one browser tab · a roster that took a manager's afternoon now takes minutes · 180+ market briefs shipped across 90+ days without a human touch.
Each row is a real deployment: what the job used to cost, what it costs now, and what that's worth over a year. Napkin math: hours per week × 50 weeks × SGD 35/hr; estimates say est.
Weekly FIFO costing by hand across supplier workbooks, est. 3–5 hrs, errors hitting the margin.
~82,000 rows costed live in a browser tab, to the cent, in production at a working shipyard.
Est. SGD 15k–30k/yr all-in: ~150–250 hrs back, ERP licences avoided, costing errors caught.
A manager's afternoon of roster wrangling, every single week.
Minutes of guided work: rules enforced, payroll exported. ~135 tests guard the numbers.
Est. SGD 5,250 per store, every year it runs; a five-store chain clears SGD 26k+ annually.
20–30 min per answer dug out of contracts and manuals (est.).
A sourced answer in a minute or two: one .exe, fully offline, nothing for compliance to review.
Est. SGD 2,700–4,500 per person per year; a five-person team, SGD 13k–22k annually.
Two analyst briefs a day, est. 1–2 hrs each trading day.
180+ briefs auto-posted to Discord across 90+ unattended days.
~90–180 hrs of writing per quarter; est. SGD 13k–25k/yr of analyst time at that rate.
Export a CSV, rebuild the same pivots, est. 1.5–2.5 hrs per event.
The dashboard fills itself as responses land.
Est. SGD 3,400–5,500/yr all-in for a weekly-events team, form-platform fee included.
The day sheet compiled and retyped for WhatsApp, est. 15 min every morning.
One click: formatted, WhatsApp-ready.
~65 hrs/yr, est. SGD 2,000 at SGD 30/hr. Small tool, honest number.
Estimates: SGD 35/hr, ~50 working weeks (SGD 30/hr for the preschool); licence and subscription savings use typical market rates. No client counts, no testimonials, just the work.
A short call or a walkthrough of the task that eats your week. If I don't think a tool pays for itself, I'll say so on the call.
You get something clickable with your real workflow in it, not a slide deck. Runs on your machines, no IT project required.
One price for the finished tool. You own it outright: the file, the data, everything. No subscription, no lock-in, no monthly hosting bill.
Your photo →I'm Soh Zheng Da, a Singapore-based engineer. I find the chore a team quietly loses hours to every week, then build the tool that makes it disappear. The receipts above are the short version.
Real, working tools. Each card leads with the chore it kills. Filter by what you're curious about, and open the ones marked Live demo to try them right here, no sign-up.
The weekly hand-reconciled FIFO costing a shipyard used to lose hours to now happens live, to the cent, across ~82,000 allocation rows, with no server, no subscription and no ERP licence. Plus a multi-tenant cloud build that syncs between editors in under a second and round-trips cleanly to an offline copy.
Kills the export-a-CSV-and-rebuild-the-pivots loop: describe a form in plain English, share a link, and the analytics dashboard builds itself as responses arrive: KPIs, attendance heat-matrices and a capacity-aware roster. One frontend runs on either of two interchangeable backends.
Replaces the invoice spreadsheet, the grade book, the weekly planner and the tax folder a freelance tutor otherwise juggles by hand: one account, everything in sync. A desktop studio, a phone companion and an admin console update in real time, each tutor's data sealed off by row-level security.
Finds out whether a strategy would have made or lost money across 25 years of market history before a single real dollar goes on the line. A web app and a Streamlit dashboard with technical indicators, ready-made strategies, equity curves and performance metrics, with configurable cash, commission and slippage.
Answers the "when can I actually stop working?" question without a subscription or a spreadsheet weekend: CPF, income, housing and Lean/Fat FIRE targets modelled in one file that opens anywhere, charts and all.
Turns a manager's afternoon of roster wrangling into minutes of guided work, worth est. SGD 5,250/year per store in recovered manager time, offline in a browser. Coverage rules, leave tracking, per-department duties and payroll export, with a versioned data model and ~135 automated tests.
Deletes the twenty-message "so where do we eat?" thread, est. 15–30 minutes of group attention per meetup. Friends join from a link with just a name (no signups, no passwords, no installs), and it ranks spots so everyone's travel time comes out roughly equal. A second mode finds the fairest MRT station for the whole group instead.
Answers from your contracts and manuals in a minute or two instead of a 20–30 minute manual dig (est.), fully offline from a single .exe, so there is no API bill and nothing for compliance to lose sleep over. Drop in PDFs, build semantic embeddings, and chat with a local language model that answers straight from the documents.
A daily analyst chore handed to a pipeline: two scheduled AI agents write a morning brief and an end-of-day wrap on the S&P 500, the Nasdaq, the Mag 7 and the macro picture, then post them to Discord automatically. More than 180 briefs are archived across 90+ consecutive unattended days.
Converts an entire folder of PDFs to clean Markdown in one queued batch, including the scanned pages that normally defeat converters, instead of a document-by-document copy-paste slog. Built and used on real technical documentation.
An automated MT5 robot built to protect capital before it chases profit: multi-timeframe trend analysis, position sizing tied to account risk, ATR-based stops, and a losing-streak detector that flips the trend bias before it digs a hole.
The scheduler line rebuilt for enterprise scale: shift swaps and disputes settled in-app instead of over email threads, with offline-first sync, drag-and-drop assignment and an admin audit log that answers "who changed what" at a glance, ready to run as an installable app.
The things I do when I'm not building something on a screen.
Daily rider, commuting and doing weekend loops on a Specialized Sirrus and a TRINX foldable.
I run my own NAS and Docker stack, build PCs, and code in Python and VBA, for fun as much as for work.
I travel with a full camera kit, most recently shooting around Fuji and Tokyo.
Xbox at home, and lately building my own games in Roblox.
I run my own Python backtests and systematic strategies, deep into low-cost ETFs and options.
I run, train, and keep a high-protein routine going.
A regular in Japan.
Quietly into the quiet-luxury thing.
If there's a task your team repeats every week that software should be doing (a roster, a report, a reconciliation), tell me about it, and I'll tell you honestly whether it's worth automating and roughly what it would give back, in hours and dollars. Rule of thumb: a chore that eats three hours a week is roughly SGD 5,000 a year of someone's time (est. at SGD 35/hr), and that's one chore in one location; across stores, teams and seasons it compounds fast. Most of the tools on this page shipped in days, not quarters, and none of them needed an IT ticket. Also entirely happy to just talk shop, bikes, cameras and markets.