Ivan Martinez
Full Stack Developer
4+ years building production-grade SaaS platforms. Specialized in scalable backend systems, complex third-party API integrations, and full infrastructure ownership — from database design to cloud deployment.
Who I Am
I'm a Full Stack Developer based in Cochabamba, Bolivia, with 4+ years of experience building production-grade SaaS platforms for companies in the US, Canada, and beyond — fully remote.
My core stack is React, Next.js, NestJS, and PostgreSQL, but I'm comfortable owning the full stack — from database schema design and backend architecture to frontend UX and cloud infrastructure.
I've worked on multi-tenant platforms, real-time systems, complex billing engines, and cross-border products serving US & Canadian markets. I take pride in writing clean, maintainable code and in delivering systems that scale.
Native Spanish speaker with professional English proficiency, used daily in remote teams.
Work History
Tech Lead & Full Stack Developer
CurrentRedlizard Studioz Inc.
- Promoted to Tech Lead after 3 months; led full architecture of a multi-tenant SaaS for document and compliance management in heavy transport, built from scratch with subdomain-based tenant isolation via Cloudflare.
- Engineered dynamic Stripe billing engine: tier-based pricing algorithm driven by active/new/archived driver counts, T+3 invoice scheduling, payment method management, and DB invoice snapshots.
- Implemented async notification pipeline (Twilio SMS + Postmark email) with Redis-backed queues and retry logic; led legacy data migration from monolithic to modular schema.
Full Stack Developer
Nacer Digital
- Built real-time persistent chat (Firestore) with full conversation continuity across workflow stages (bid → contract → active work) on a multi-role freelance marketplace; designed a multi-role rating system with star-distribution chart.
- Replicated full AWS production environment for staging from scratch: Amplify (frontend), Elastic Beanstalk (backend), RDS, SSL certificates, and DNS routing.
- Implemented event-sourcing table pattern as a domain-agnostic action queue; developed dispute resolution flows, milestones, time logs, and service provider profiles.
Software Engineer
Iventiva
- Designed automated email notification pipeline: 3 flows × 3 retries = up to 9 scheduled emails per user, covering identity verification, bank authentication, and mortgage assessment for a cross-border real estate SaaS.
- Reduced a critical DB query from 28s → 3.5s (~87% improvement) via schema redesign, N+1 ORM elimination, and materialized views on a Ruby on Rails application.
- Integrated third-party services for identity verification, bank data validation, and creditworthiness evaluation; managed Heroku deployments and production incident response.
Full Stack Developer, Intern
Fundación Jala
- Built full-stack features across internal projects applying SOLID principles, design patterns, and clean architecture in Agile/Scrum teams.
Live Products
Production applications I helped design, build, and ship at previous companies.
ComplyDQ
Redlizard Studioz Inc.Document management SaaS for heavy transport companies built from scratch. Multi-tenant architecture with per-company subdomain isolation via Cloudflare, a dynamic Stripe billing engine with tier-based driver-count pricing and 3-day deferred scheduling, and a Twilio/Postmark notification pipeline queued via Redis. Deployed on a bare Linux server with pm2 and Keycloak for identity management.
ProtoCall
Nacer DigitalFreelance marketplace where companies and individuals post projects and freelancers apply to them. Supports multi-role workflows, real-time persistent chat, milestones, time logs, and dispute resolution with an admin decision panel. The rating system mirrors Upwork's model: star distribution, weighted average, and last-5-reviews. Deployed on a self-hosted server via a CI/CD pipeline.
ManoTécnica
IventivaSaaS platform that field-service companies (plumbers, electricians, masons, and similar trades) subscribe to for managing their technicians. Features a Google Calendar-style scheduler visible to both technicians and company admins, real-time GPS tracking via Google Maps, and media uploads for work verification. Payments are handled through Stripe with country-specific product configurations. Full AWS staging environment set up from scratch: Amplify, Elastic Beanstalk, RDS, SSL, and DNS routing.
Ownly
IventivaReal estate SaaS built for the Canadian and US markets, where agencies list land and buyers can design their future home through an interactive, Minecraft-style house builder. It integrates third-party services for identity verification (US/CA providers), bank authentication, and mortgage capacity evaluation, supported by an automated multi-stage email pipeline and significant DB query optimizations.
Tech Stack
Frontend
Backend
Databases
DevOps & Cloud
Integrations
Languages
Academic Background
Universidad Mayor de San Simón
Bachelor's Degree · Computer Science / Informatics Engineering
Get In Touch
I'm open to remote opportunities, freelance projects, and interesting collaborations. Feel free to reach out — I usually respond within 24 hours.