I build systemsthat turn ideasinto revenue.
Full Stack Engineer focused on eCommerce, automation, and scalable product systems that drive real business outcomes.
Scaling a Nursery into
a Digital Business
Sole engineer, product manager, and operator. Took a manual business and built the digital infrastructure that turned it into a revenue-generating system.
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Problem
Manual workflows, zero structured eCommerce system, inefficient inventory handling. Every order managed by hand. No visibility into stock, no automated tracking, no conversion infrastructure.
- No eCommerce platform
- Manual inventory & orders
- Zero automation
解決
Solution
Built a full eCommerce platform from scratch. Created the "Plant Wizard" β a proprietary product discovery system that converts browsers into buyers. Automated inventory tracking, low-stock alerts, and order updates via Google Apps Script.
- Full eCommerce platform
- Plant Wizard discovery system
- Automated order & inventory workflows
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Impact
Took the business from $0 digital revenue to $40,000+ while simultaneously acting as engineer, product manager, and operator. Ongoing β still shipping improvements.
- $40,000+ revenue generated
- 40% reduction in operational workload
- Full product lifecycle ownership
Stack &
Expertise
Full-spectrum engineering β comfortable across the entire stack, with depth in backend systems and eCommerce automation.
Frontend
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Backend
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Systems & Tools
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How I Build
β and why it works.
I don't just build features. I build systems that solve real business problems, automate workflows, and scale with growth. From idea to deployment, I take full ownership of the product.
Total Ownership
I don't hand things off β I ship them. From database schema to deploy script, I treat every product as if my name is on it. Because it is.
Automate Everything
Manual processes are technical debt in disguise. I look for the repetitive, the error-prone, and I replace it with systems that don't sleep.
Build to Scale
Writing code that works today is the baseline. I architect for the version of the product six months from now β with room to grow.
Measure Impact
Every technical decision maps back to a business outcome. I care about efficiency percentages and revenue numbers, not just clean code.
βAutomation isn't about replacing people β it's about freeing them to do the work that actually matters.βEstevan Mejia
8 years.
Proven track record.
From early-stage startups to independent ventures β a consistent record of building systems that stick.
- Architected and shipped a complete eCommerce platform from scratch β sole engineer, product manager, and operator
- Built the "Plant Wizard," a proprietary product discovery system that converts browsers into buyers
- Automated 40% of manual operational overhead via custom Google Apps Script integrations
- Delivered custom web and eCommerce solutions for clients across industries, including Japan-based creators
- Managed full project lifecycle: client relations, timelines, and technical execution
- Established robust CI/CD pipelines and deployment workflows
Notable Clients
Freelance Full Stack Developer
Independent
- Built backend systems and REST APIs for multiple clients
- Reduced inventory stock issues by 25% via custom inventory management system
- Integrated Stripe and PayPal payment processing pipelines
Backend Software Engineer
TS Co
- Improved system performance and reduced load times by 40%
- Deployed and maintained microservices on AWS infrastructure
Let's build
something great.
Open to senior Full Stack roles β especially at product-minded teams working on meaningful systems. Currently exploring opportunities in Japan.