Crafting Code, Creating Impact

Senior AI Full-Stack Engineer with 8+ years building scalable B2B SaaS products with strong Typescript expertise across frontend and backend. I've architected REST APIs serving thousands of daily requests, designed type-safe full-stack systems, and collaborated closely with Product Managers and UX designers to deliver customer-centric solutions. Expert in applying SOLID, GRASP, DRY, KISS and YAGNI principles pragmatically while maintaining focus on incremental delivery and modern engineering practices. Core tech: Typescript, ReactJS, Next.js, NestJS, PostgreSQL, AWS. Proven ability to rapidly grasp complex workflows and translate customer needs into robust, scalable systems.

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TypeScript
React
Node.js
PostgreSQL
AWS
Docker
Next.js
NestJS
Python
.NET
Go
Angular
React Native

Experience

A decade of building impactful solutions across startups and enterprises

  1. Remote

    Co-Founder & Lead Software Engineer

    PGG

    Founded and lead technical development of AI-powered livestock management platform using computer vision for cattle weight estimation. Scaled to 193 farms, 448 users, and 70,000+ animals with 93% accuracy.

    Key Achievements

    • Co-founded AgTech startup winning national 'Desafío AgTech 2023' competition
    • Architected end-to-end cattle weighing automation system with type-safe TypeScript across frontend (Next.js) and backend (NestJS REST APIs), and dedicated Python/FastAPI microservices for ML inference
    • Engineered scalable multi-tenant SaaS handling hundreds of concurrent users with sub-300ms API response times, async queue processing for ML workloads, and graceful error handling, achieving 99.8% uptime through monitoring with Sentry
    • Designed hybrid architecture separating business logic (modular monolith) from ML processing (dedicated microservices), enabling independent scaling and deployment of compute-intensive operations while maintaining system reliability
    • Led data-driven technical pivots: migrated from real-time to offline processing after production analysis showed reliability issues, and introduced dual-camera setup increasing model accuracy from 67% to 93% based on edge case analysis
    • Reduced weighing time from 4 hours to 30 minutes per session, saving 50 hours/month per farm through process automation
    • Deployed on AWS (EC2, S3, Lambda, SQS, RDS) and CI/CD through GitHub Actions

    Responsibilities

    • Own complete technical strategy from requirements to architecture and deployment
    • Manage 3-person engineering team while remaining deeply hands-on with code across full stack, balancing strategic technical decisions with daily execution and feature development
    • Drive product roadmap based on direct customer feedback from producers
    • Design and maintain multi-tenant architecture supporting 193 simultaneous farms with 448 users
    • Build offline-first synchronization for unreliable rural connectivity

    Technologies

    Next.js Node.js NestJS TypeScript Python FastAPI PostgreSQL AWS Docker GitHub Actions Sentry
  2. Remote

    Senior Full-Stack Engineer

    InfoGain

    Contributed to loan approval platform processing thousands of daily credit evaluations, driving architectural improvements and quality standards in a multi-team enterprise environment.

    Key Achievements

    • Designed and implemented customer profile evaluation API aggregating data from 10 financial services, applying REST API design principles including versioning, backward compatibility, and graceful degradation to ensure system resilience
    • Built adapter-based integration layer abstracting differences between external APIs (REST/SOAP, JSON/XML, OAuth vs API Keys), implementing fallback strategies and comprehensive error handling to maintain service availability despite third-party instability
    • Applied SOLID, DRY and KISS principles pragmatically during systematic refactoring campaign, increasing test coverage from 44% to 73% and reducing code smells by 24% while maintaining backward compatibility
    • Reduced API response time from 1.2s to 500-550ms through query optimization
    • Implemented monitoring and alerting for external API health, reducing MTTR and enabling proactive customer communication about service impacts

    Responsibilities

    • Design and maintain integration layer for credit bureaus and identity verification services
    • Built robust customer profile evaluation system for loan approvals, aggregating and normalizing data from multiple sources to generate unified credit assessments
    • Collaborate across multiple teams to establish API contract standards, coordinate breaking changes, and maintain system stability during major platform migrations
    • Conduct code reviews enforcing Clean Code, SOLID, GRASP, DRY, KISS and YAGNI principles
    • Contribute to architectural optimization preparing monolith for microservices migration

    Technologies

    TypeScript Vue .NET SQL Server Docker Jenkins AWS
  3. On-site

    Software Design Professor

    ORT University

    Taught advanced software design course to Systems Engineering students, covering REST API development, Angular, design patterns, and technical documentation.

    Key Achievements

    • Taught .NET, Angular, Software design patterns, SOLID, GRASP, Clean Code, TDD, REST API design principles, and architecture design
    • Trained 120+ future software engineers in industry-standard practices
    • Conducted individual oral defenses assessing implementation decisions and documentation

    Responsibilities

    • Design curriculum covering .NET 6+, Angular, and software design patterns
    • Evaluate student code on TDD, software design patterns, SOLID/GRASP adherence, and technical documentation

    Technologies

    .NET Angular TypeScript
  4. Remote

    Frontend Lead & Senior Full-Stack Engineer

    1950Labs

    Senior Full-Stack Engineer at software consultancy, architecting and delivering enterprise solutions for diverse clients. Led frontend development initiatives, drove architectural decisions, and mentored engineers on full-stack best practices.

    Key Achievements

    • Led frontend development for large-scale enterprise project management platform serving 10,000+ users
    • Designed REST API layer following SOLID principles, establishing API contract standards, versioning strategies, and comprehensive error handling patterns that became team-wide best practices
    • Optimized frontend performance through code splitting, lazy loading, and efficient state management (Redux), reducing initial load time from 4s to <1.5s and improving time to interactive metrics
    • Built real-time data synchronization system handling concurrent edits from thousands of users, implementing conflict resolution strategies and optimistic updates while maintaining data consistency
    • Led emergency Angular 12→15 migration in 2 weeks with zero production incidents
    • Mentored 10+ junior engineers through weekly pair programming sessions and designed onboarding program with week-long intensive training

    Responsibilities

    • Lead frontend team of 5 engineers in agile environment
    • Drove critical architectural decisions in partnership with product and design teams, translating business requirements into scalable solutions
    • Own complete feature lifecycle from database schema design through NestJS backend APIs to frontend delivery
    • Conduct comprehensive code reviews enforcing Clean Code, SOLID, GRASP, DRY, KISS, YAGNI and software design patterns
    • Conduct client demos gathering real-time feedback

    Technologies

    Next.js Angular NestJS TypeScript Jest Cypress PostgreSQL Docker GitHub Actions Jenkins AWS Sentry Datadog
  5. On-site

    Backend Technical Lead

    Evertec

    Led backend architecture for QR-based mobile payment system in partnership with Latin America's leading payment processor, as Systems Engineering capstone project.

    Key Achievements

    • Designed scalable microservices architecture with Clean and Hexagonal Architecture
    • Built secure RESTful APIs with .NET
    • Deployed on Azure with 85% test coverage

    Responsibilities

    • Design and deploy cloud infrastructure on Microsoft Azure
    • Implement CI/CD pipelines reducing release time by 60%
    • Integrate with external payment gateways and banking APIs

    Technologies

    .NET Azure Docker Redis
  6. On-site

    Technical Mentor & Systems Administrator

    ORT University

    Provided technical mentorship to 100+ students weekly while managing infrastructure for 12 computer labs and 60+ classrooms across Linux and Windows environments.

    Key Achievements

    • Mentored students on Clean Code, SOLID, GRASP, TDD, and software architecture
    • Guided 50+ project teams through full development lifecycles with Agile methodologies
    • Automated software deployment reducing setup time by 70%
    • Increased student satisfaction offering technical support and mentorship

    Responsibilities

    • Administer infrastructure for 12 labs serving 1000+ students
    • Provide Git troubleshooting and teach branching strategies (GitFlow)
    • Teach substitute classes for Programming, Data Structures, and Algorithms

    Technologies

    Node.js .NET PostgreSQL SQL Server
  7. On-site

    Full-Stack Software Engineer

    Inzol Consulting

    Developed and deployed production-ready web application with AngularJS frontend and .NET Framework backend in Agile environment.

    Key Achievements

    • Architected RESTful APIs following SOLID principles and clean code practices
    • Built responsive cross-browser UI components with AngularJS and HTML5/CSS3
    • Reduced bugs by 30% through unit and integration testing implementation
    • Collaborated with stakeholders through iterative feedback cycles

    Responsibilities

    • Develop frontend and backend features in 2-week sprints
    • Participate in daily stand-ups, retrospectives, and sprint planning
    • Maintain technical documentation for APIs and system architecture

    Technologies

    Angular .NET

Education

Formal training in software engineering

ORT University

Bachelor of Science

in Computer Science Engineering

GPA: 3.44/4.0 (86% local scale)

Get in Touch

Let's build something amazing together.

ignacio@harretche.dev Connect on LinkedIn

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