Hi, I'm Sol —

I find the hours your business is losing, and build the small software that gets them back.

I'm a software engineer in Queens, NY. I spent years building production software at companies like TripleLift, Blackboard, and MIRROR — and somewhere along the way I noticed the businesses that could use that engineering most were the ones no software company bothers with: the landscaper, the family farm, the five-person consultancy where the same information gets typed into three places.

These days I build custom tools for businesses like yours — document assistants that answer questions from your own files, agents that reply to new leads in minutes instead of mornings, and small internal apps that replace the spreadsheet held together with hope.

It starts with a free audit: I look at how your work actually flows and send you a short written report on what's worth fixing — and what isn't. No cost, no pressure, and the report is yours to keep either way.

that's me
Sol Jin
Sol · engineer, Queens NY
What I build

Three things. On purpose.

A short menu means I've built each of these before and can quote you a flat price with a straight face.

Document Q&A assistants

A private assistant trained on your files — contracts, manuals, policies, compliance docs. Your team asks in plain English, it answers with the source cited.

Good fit if: your staff spends real time digging through PDFs and binders for answers.

from $3,500 flat-priced after the audit · yours to own

Lead qualifier & responder

Watches your inbox and web forms, replies to new inquiries within minutes in your voice, asks the qualifying questions, and texts you a clean summary of every lead.

Good fit if: inquiries sit overnight and callers book with whoever answers first.

from $2,500 + optional monthly for hosting & tuning

Internal tools & dashboards

Small custom software for the jobs off-the-shelf apps don't fit — invoicing, scheduling, intake forms, and dashboards showing the numbers you actually run on.

Good fit if: the same information gets typed into more than one place.

from $3,000 scoped and quoted in your audit report

every project is flat-priced up front — no hourly meter running

Recent work

Things I've actually built.

A few recent projects, short version. The full stories — why each client called, what I noticed, and how the fix took shape — live on the work page.

From spreadsheets and email to a searchable client platform

Azuri · data platform + AI assistant

The problem

An environmental compliance consultancy living out of Excel and email attachments. Client documents had no home, and finding anything meant inbox archaeology.

What I built

A secure platform where every client's documents and submissions live in one searchable, filterable place — and later, an AI assistant that answers questions from those documents with sources cited.

The training business that outgrew its Google Doc

BSMT Personal Training · client portal

The problem

A personal trainer with plenty of referrals but no room to grow: sessions, packages, and progress all tracked in one giant Google Doc and endless text threads.

What I built

A custom client portal — sessions remaining, workouts logged, progress tracked. The admin stopped growing with the client list, and online coaching became possible for clients who travel or move away.

One-click invoicing for a small farm operation

Agriculture · internal tool

The problem

Crews wrote job tickets by hand; someone re-typed every one into invoices on Sunday nights. Same information, written three times, with errors creeping in.

What I built

A single-entry invoicing tool shaped around the ticket format the crews already used. Enter a job once — the invoice, records, and weekly totals follow automatically.

Read the full client stories →

The free audit

Here's what you actually get.

Not a sales deck — a short written report. What's eating your hours, what I'd fix, what it would cost, and what it would save. In plain English, with real numbers.

Take it to another developer, hand it to your nephew who codes, or shelve it. It's yours. And if software isn't your answer, the report says that instead.

this is a sample — yours is about your business

Download the full sample report (PDF)

Workflow audit — Page 2 of 4
2.1Invoicing: ~6 hrs/week of double entry

Job details are recorded on paper, then re-typed into invoices on Fridays. Recommendation: single-entry invoicing tool. Est. cost: $3,200 flat. Est. payback: under 3 months.

2.2Leads: inquiries answered next morning

Web form inquiries submitted after 3pm wait overnight. Callers who reach a competitor first tend to book there. Recommendation: instant lead responder. Est. cost: $2,500 + $150/mo.

2.3Scheduling: fine as-is

Current calendar process works. Recommendation: no change. Custom software here would cost more than it saves.

Prepared by Sol Jin Cost to client: $0
How it works

Three steps. One of them is a coffee.

You walk me through it

30–45 minutes, on a call or on-site. You show me how work really flows — from the first phone ring to the final invoice. I mostly listen.

I map the busywork

I go through what I saw and find where the hours leak: double entry, slow lead responses, buried paperwork, reports built by hand.

You get the report

A short written report like the sample above — findings, fixes, flat prices, payback estimates. Then the decision is entirely yours.

My promise: no cost, no pressure, no lock-in. I'd rather tell you "don't buy anything" and earn your trust than sell you software you don't need. A small business runs on trust and referrals — so does mine.

Who you're working with

One engineer. That's the point.

When you work with me, the person who audited your business is the same person who designs the tool, writes the code, and answers the phone when something's weird. No account managers, no offshore hand-offs, no "ticket has been escalated."

I've spent years building production software at companies like TripleLift, Blackboard, and MIRROR (Lululemon), and I hold an M.S. in Computer Science from Georgia Tech. Big-company engineering habits — testing, reliability, security — applied at a scale and price that makes sense for a small business.

Why "Banchan"? Banchan are the small dishes that fill a Korean table — no single one is the meal, but together they make it. That's how I think about software for a small business: not one giant system, but a handful of small, carefully made tools that quietly make everything better.

I keep only a few clients at a time, on purpose. You'll always know exactly where your project stands.

FocusAI assistants, agents & custom internal tools
BackgroundTripleLift · Blackboard · MIRROR (Lululemon)
EducationM.S. Computer Science, Georgia Tech
ApproachA few clients at a time, tools built to be owned
Based inQueens, NYC — serving the East Coast & remote
ProjectsFlat-priced · delivered in 2–6 weeks
Straight answers

The questions owners actually ask me.

What does this really cost?

The audit is free, full stop. Projects start around $2,500–$3,500 and are flat-priced before you commit — sized so the tool pays for itself in months. The exact number is in your audit report, in writing.

Do I need to be technical?

No. You explain how your business runs — plain English is the whole interface. I handle everything technical and hand your team tools they can use on day one.

Is my data safe?

Yes. Your documents and customer information stay private to your business. Nothing is shared, sold, or used to train anything public. Put it in the contract — I insist.

What if software isn't the answer?

Then the report says so. Sometimes the fix is a $30 app that already exists, or a process change. Telling you that costs me a sale and earns me a referral — good trade.

Find out what the busywork is costing you.

One short call. One written report. Zero obligation. Worst case, you learn exactly where your hours go.

Get your free audit or just email me — hello@soljin.io. I read everything myself.