A remote, senior engineering practice. Costa Rica / Remote
When off-the-shelf software won't fit,
I build what does.
Senior technical judgment and hands-on delivery in one seat. Most engagements start with a bounded architecture diagnostic, one to three weeks, fixed price, ending in a decision, not a proposal. From there: fixed-price, milestone-gated platform builds, or fractional CTO leadership where you need the seat. Private client portal: you always know where your project stands. I have owned payment systems across 100+ gateway integrations and hundreds of millions of dollars in transactions, and I still ship critical-path code.
I work with finance, payments, and operations leaders who need systems that fit how the business actually runs, and with founders who need senior technical judgment and hands-on delivery in one accountable person.
One Engagement. Three Capabilities.
Not three services packaged together. One service, building your platform, that naturally requires all three.
Strategy
What to build and why. CTO-level judgment on scope, priorities, and technology choices so you don't waste time or money building the wrong thing.
Architecture
How to build it so it scales. Real architectural decisions, auth, APIs, databases, deployments, designed with 36 years of real-world experience.
Delivery
Actually building it. Hands-on, AI-accelerated development. Clean code, deployed to production, handed over with documentation.
Start here
Bounded Architecture Diagnostic
Fixed scope, 1 to 3 weeks, quoted for your system after a call. A scoped review of the system you are stuck on, ending in a written build-vs-buy-vs-rent recommendation you can act on with or without us.
Fixed-Price Platform Build
Fixed price, milestone-gated, 50% deposit, quoted per project. Scoped to how your business actually runs, with stop/continue gates at each milestone.
Fractional CTO: Finance, Payments & Operations Systems
Monthly engagement, 90-day minimum, scoped and quoted per engagement. Architecture, roadmap, build-vs-rent decisions, and critical-path code, about one day a week.
Not hourly billing. Not staff augmentation. Not 24/7 on-call, SEO, or hosting. One accountable person who decides and ships.
Fixed price, milestone-gated
You know the cost before I start, and every milestone is a stop/continue gate.
Private Client Portal Included
- ✓Live tasks, tickets, and progress tracking
- ✓No black box, you always know where things stand
- ✓No scope creep. No surprises. Just delivery.
Platforms We've Built
Each one built end-to-end: strategy to architecture to delivery.
AIDA: Enterprise Tax Compliance Platform
Costa Rican VAT (IVA) reconciliation rebuilt from scratch: 1.05M import rows, 6 generated reports, and a nearly 5,000-line tax engine that replaced a legacy VBA macro.
Pizote: Automated Public Tender Scanning
Tender discovery for companies that bid on Costa Rican public contracts: scheduled SICOP retrieval, per-tenant matching, detail extraction, and notifications in the app, Telegram, and Signal.
Opportunity Radar: Evidence-Grounded Discovery
Two discovery lanes feed one canonical evaluation engine: fit and actionability from real evidence, a human decision, or an honest insufficient-evidence result when the data is not there.
A senior engineering practice for finance, payments, and operations.
LogicBison is a remote, senior engineering practice. I build platforms for finance, payments, and operations, the systems that run how a business actually works, and I assess the security of the systems I and others ship.
Senior architecture, development, QA/PM, and CTO-level security leadership in one accountable person.
Fixed scope. Milestone-gated. Independent QA on every delivery.
LogicBison was founded by Alejandro Castro, a software architect with 36 years shipping production software. Meet Alejandro →
“When a project needs a specialist, a designer or a data engineer, I bring one in. You never manage them. I do.”
Ready to Build Your Platform?
One 30-minute call to see if I'm the right fit. No pitch. No pressure. In English or Spanish, just a conversation about what you need to build.
Every engagement is scoped and quoted individually. There is no rate card, and no price before I understand the system. The first step is a 30-minute call, in English or Spanish; you leave it with a clear read on scope, sequence, and what the work would take.