2024 — Present
Toptal · Consulting Collective
- RIPL payroll (Python + Next.js) • FlexBets (Spring Boot odds) • FICO license portal (Java + Angular)
- Fintivio banking onboarding (AWS/SST) • Omnios-Health EHR SDK • Golden Camel React Native betting
Founder · Product Engineer · Storyteller
Cesar Leon
I architect and operate category-bending platforms—then stay to scale the teams behind them.
I’m Cesar Leon. I build loan rails (Loanr), city-scale audio layers (Touring), civic operating systems (Cleude), and consumer hits like Birthude. Each product exists, has paying users, and was engineered, designed, and narrated by me.
Venture-backed co-buildsEmbedded teams for enterprisesLATAM-first viewpoints
9
Years shipping
40+
Platforms launched
11
Countries served
Live systems
Loanr
Dealer-first loan orchestration
Touring
Spatial audio storytelling
Cleude
Civic community OS
Birthude
Consumer celebrations
Laburauto
Mobility ops
Flowri
AI workflows
Mentally
Health programming
Client & employer work
Consulting + engineering track record
Beyond the Askn Us portfolio, I’ve spent the last decade leading squads for Toptal clients, QRA Corp, Kenect, Zazmic, Grupo Assa, and more. Here’s the condensed read—tap through for the full CV.
2022 — 2024
QRA Corp
- UI/UX redesign, Angular Elements SDK, Chrome extension rebuild
- Maintained Java 9 + Spring Boot stack and Azure infra
2019 — 2022
Kenect · Zazmic · Grupo Assa
- Java/Quarkus microservices, Firebase/MySQL integrations, GCP deployments
- Node.js radiology microservices (DICOM/HL7) with GCP Functions, BigQuery, Postgres
- Equifax Veraz migration to GCP microservices, SAGA-style data consistency
Lead capture
Book a working session
Send a note and I’ll reply with relevant case studies, pricing structures, and recordings of the platforms above.
Scroll the story
From systems builder to multi-product operator
Scroll intentionally: each step locks into place, revealing how consulting work, Askn Us LTD, and long-form shipping overlap.
01 · Pattern recognition
From SaaS integrator to venture studio
Began as an engineer aligning enterprise systems for LATAM banks. Noticed founders re-building the same flows, so I codified playbooks for onboarding, underwriting, and ops telemetry.
- fast prototyping rituals
- shared compliance layer
02 · Askn Us LTD
Company-as-a-toolbox
Formed Askn Us LTD so every product—Loanr, Touring, Cleude, Birthude, Laburauto, Flowri, Mentally—shares an infrastructure spine. Investors see cohesive reporting, teams get dedicated squads.
- 7 live platforms
- one contract structure
03 · Now
Hiring / Collaboration
I’m opening capacity for senior product leadership, venture co-building, or staff-plus engineering roles where narrative, UX, and infra intersect. Yes, I still ship code daily.
- seeking hybrid Product+Eng roles
- remote or LATAM hubs
Operating thesis
Platforms that feel cinematic, data-native, and trustworthy.
Narratives start with generous onboarding, not PDFs.
Interfaces should broadcast confidence with type, rhythm, and motion.
Ops reliability matters: audit logs, permissions, and automations are built-in.
Company stack
Products I operate and evolve
Each platform runs on its own stack and P&L. Jump in, explore, and when you hit the CTA, the respective product server takes over.
Fintech Infrastructure
View story Loanr
Dealer-first loan orchestration
Pipelines, documentation, and compliance layers designed for fast-moving finance teams that want visibility without friction.
$420M+ · Loan volume routed630 · Dealers onboarded
Experiential Media
View story Touring
Audio stories that move with you
Blends editorial-grade production workflows with simple curation tools so any neighborhood can become an immersive gallery.
24 · Cities live1.8M · Stories streamed
Civic Ops
View story Cleude
The private neighborhood OS
Designed with city-scale reliability but flexible enough for every HOA, condo board, or master-planned community.
58K · Residences managed1,240 · Vendors automated
Consumer SaaS
View story Birthude
AI-crafted RSVP experiences
Pairs visual direction with data capture so hosts get beautiful invites and actionable guest insights in minutes.
310K · Invites launched92% · Automation rate
Marketplace Infra
View story Laburauto
P2P vehicle rentals with serious paperwork
A marketplace in a box: onboarding, compliance, fleet analytics, and payouts engineered for trust.
9,400 · Vehicles listed46 · Cities covered
Platform OS
View story Flowri
Enterprise-grade low-code suite
Ops leaders design internal products, secure them, and ship to employees or customers without bouncing between tools.
12M · Flows executed monthly300ms · Latency SLA
Healthtech
View story Mentally
Live group therapy infrastructure
Purpose-built for mental health collectives who need secure video, messaging, and billing in one privacy-first stack.
3,200 · Therapists hosted48K · Sessions monthly