Fig. 01 — Custom software · Lima, Peru

I build the system your company currently runs by hand and leave it running.

I work with companies that already know their process and are holding it together with spreadsheets, WhatsApp and overtime. I design, build and ship the system that replaces it. No in-house tech team required.

Taking on new projects
who for
small businesses and teams that need their own software, not a template
where
Lima, Peru · remote
Renzo Lenes at his desk
Fig. 02Lima, Peru · 2026
What I build
01

Custom management systems

Inventory, production, sales or attendance: the software your operation needs and that no off-the-shelf product quite covers.

02

AI automation on top of what you already have

An assistant that reads your documents and answers, or agents that handle repetitive enquiries using your real data.

03

Payment and electronic invoicing integrations

Online payments and SUNAT-connected invoicing, wired into the system your team already uses every day.

01

An assistant that answers for you

Your team answers the same questions every day, and the answer is already written down in some manual. I teach a system to read that documentation and answer on its own, careful never to invent anything it cannot back up.

RoleDesign, backend and deploymentYear2024 — presentStatusIn production
Fig. 03 — How it reads your documents and answersblue = where the system picks what to answer
PREPARED ONCEHAPPENS EVERY TIME SOMEONE ASKSMEASURED ON A CLIENT'S REAL SUPPORT VOLUMEyour manualsit splits themit reads themit stores themin orderthe customerasksit searches yourdocumentsit picks whatreally answersit writes thereplyit checks beforesendingit does not keep what looks close,it keeps what answersif your documents do not say it,it does not make it up8 out of 10 queries resolved without anyone touching them
normal step the step that makes the difference— — — prepared once, used always
02

WhatsApp support that does not stop on Saturdays

Quoting, sending prices and booking visits eat most of your team's day. I automate that layer: the system understands what is being asked, looks it up in your own data and answers — and hands the conversation back when a real person is needed.

RoleAgent design, backend and integrationYear2025 — presentStatusIn production
Fig. 04 — What happens when someone messages youblue = where it decides how to reply
YOUR USUAL WHATSAPPYOUR OWN DATAMEASURED IN A REAL OPERATIONthey messageyou on WhatsAppit understandswhat they wantit decides howto answerit answers thecustomeryour catalogueand pricesit builds thequoteit booksthe visitit hands thechat backonly when it is notsure of the answer−60% of the sales team's manual work
normal step the step that makes the difference— — — when it hands the chat back to you
03

Attendance control nobody can lend out

If attendance is a code on a screen, someone will photograph it and send it over WhatsApp. I build the mechanism that makes that useless: the code changes on its own, and a check-in only counts if the person is inside the site.

RoleProduct, backend and appYear2024StatusIn production
Fig. 05 — How the attendance check-in worksblue = what stops it being shared
EVERY 15 SECONDSSYSTEM IN OPERATIONthe system makesa new codethe screenshows ityour teamscans itvalid codeand on siteattendancerecordedattemptrejectedit changes by itselfevery 15 secondsa photo of the codeis useless a minute laterif they are not on site,it does not countThe code lasts 15 seconds and only works inside the site
normal step the step that makes the difference— — — the attempt the system rejects
—

How I work

From the conversation to a working systemFig. 06
the problem youhave todayhow it getssolvedthe engine andyour datawhere itwill livethe screen yourteam usesrunningevery daythis is wheremostprojectsfallapart

// I do not hand over a demo: I hand over something your team opens on an ordinary Tuesday

Contact

Let's talk.

If you are building something with AI that has to work every day, or you have a manual process that has run out of road, write to me and we will look at it.

email
lenesrenzoalberto@gmail.com
whatsapp
+51 904 890 457
linkedin
renzo-alberto-lenes
github
RenzoLenes
cv
CV — Full Stack (PDF)
CV — AI Engineer (PDF)