Working at the intersection of product and automation.

MVPs, AI integrations, and internal automation — scoped in a call, shipped in weeks, handed over clean.

John Cedrick Guevara

John Cedrick Guevara

Freelance MVP & automation developer

Experience
2026AI Developer InternAfterHours
2025Full-Stack DeveloperFreelance
2025Project Based DeveloperOptrizo
2025Co-founder & Lead DeveloperZentari Software
2024Hello WorldThe start of my journey
In the room
Pitching PropertyEase to the judging panel at the Inventi Hackathon

Pitching PropertyEase

Client scoping session around a table with laptops open

Requirements session

On-site with the Kaizen Fitness team at their front desk

On-site at Kaizen Fitness

Project team and client after a delivery meeting

Delivery handoff

Available for work
12+ Products Shipped

Currently building • AI • SaaS • Full-stack

01Selected work

Systems I've shipped

A few builds where the problem was messy, the scope was real, and something shipped. Full archive is one click away.

View All Projects
Featured Project
FlowForge

Workflow automation platform for event-driven business processes

An end-to-end platform that automates business processes using custom event-driven workflows, saving teams 20+ hours per week.

Express.jsPostgreSQLEvent-Driven Architecture
40%
Time Saved
100+
Automations
8
Integrations
FlowForge
Opsidian

Opsidian

Knowledge work gets fragmented when tasks, notes, and events live in separate places with weak relationships.

TypeScriptReactLocal-first Storage
TrackiFi

TrackiFi

Personal finance tools often record transactions without helping users understand the behavior behind their spending.

Next.jsNode.jsPostgreSQLAnalytics
Booking SaaS

Booking SaaS

Service businesses lose revenue when scheduling, availability, and client bookings are handled through scattered tools and manual coordination.

Next.jsAzurePostgreSQLSaaS

Selected work only

Most client systems are internal tools and private dashboards I can't publish. Happy to walk you through them live on a call.

02Services

Three ways to work with me

Fixed scope, fixed timeline, quoted before anything starts. Pick the one closest to your problem — we adjust on the call.

01

MVP Development

Build a functional, high-fidelity first version of your application to test the market, gather user feedback, and secure early traction.

Best for"Founders who want to validate fast"
Timeline 2-4 weeks
What you get
  • Secure user authentication (Auth)
  • Core product features & user workflows
  • Automated production cloud deployment
You end up with"Working product ready for users"
02

AI Integration

Embed generative AI capabilities directly into your software applications and internal processes.

Best for"Teams seeking to automate knowledge workflows"
Timeline 1-3 weeks
What you get
  • AI Chatbots & Copilots
  • LLM API Integrations (OpenAI, Gemini)
  • RAG (Retrieval-Augmented Gen) Systems
  • Autonomous Agent Workflows
You end up with"Smarter systems, less manual work"
03

Business Automation Systems

Streamline workflows, connect disparate platforms, and remove operational bottlenecks with custom systems.

Best for"Operators ready to replace manual operations"
Timeline 2-5 weeks
What you get
  • Interactive Admin Dashboards
  • Data Syncing & ETL Pipelines
  • Custom Internal Tools & Portals
  • Repetitive Workflow Replacements
You end up with"Reduced operational overhead"
03How I work

Four steps, no surprises

Every project runs the same way, so you always know what happens next and what you get at the end of it.

01

Scope call

30 min

We go through the problem, the constraints, and the budget. You leave with a clear view of what is buildable now and what should wait.

Written scope + fixed quote

02

System design

2–4 days

Before any code, you get the plan: screens, data model, integrations, and a milestone list. This is where the expensive mistakes get caught.

Architecture doc + milestones

03

Build

1–3 weeks

Shipped in tight iterations with a working demo every week. No month-long silences, no surprise scope creep.

Weekly demo you can click

04

Handover

1–2 days

Deployed, documented, and fully yours. Source access, database guide, and a walkthrough so your team can take it forward without me.

Live system + full ownership

Ready to build

Tell me what you're stuck on.

Get a clear plan, fast execution, and a working outcome without turning the build into months of uncertainty.

15m

scope call

24h

reply window

1

system plan

After the call

Send your idea. I will reply with architecture, timeline, and scope.

Share the product or workflow you want to build. After the call, I will send a quick system plan so you can see the path before committing to a build.

Built around momentum
01Speed
02Clarity
03Outcome