Hello! 👋 ¡Hola! 👋

I'm Soy Melisa Onofri

Senior Software Engineer Ingeniera de Software Senior

Download CV Descargar CV
|

About Me Sobre Mí

Senior Software Engineer with 6+ years of experience designing, building, and shipping production systems across fintech, e-commerce, and platform infrastructure. Specialized in backend development with a strong focus on microservices architecture, distributed systems, and third-party integrations. Experienced across both large-scale multinational product companies and fast-paced startups, as well as US-based client engagements. Proven ability to lead technical initiatives and coordinate with stakeholders and cross-functional teams. English proficiency: C1 Advanced (Cambridge CAE certified). Ingeniera de Software Senior con más de 6 años de experiencia diseñando, construyendo y desplegando sistemas productivos en fintech, e-commerce e infraestructura de plataformas. Especializada en desarrollo backend con fuerte foco en arquitectura de microservicios, sistemas distribuidos e integraciones con terceros. Experiencia tanto en grandes empresas multinacionales de producto como en startups de ritmo acelerado, así como en proyectos con clientes de Estados Unidos. Capacidad comprobada para liderar iniciativas técnicas y coordinar con stakeholders y equipos multifuncionales. Nivel de inglés: C1 Advanced (Cambridge CAE).

Skills Skills

Languages & Frameworks

Java Go TypeScript/Node.js Kotlin Python Angular React Flutter

Cloud & Infra

AWS Docker Terraform Pulumi Argo CD CircleCI Jenkins

Databases

PostgreSQL MySQL NoSQL (Firestore, DynamoDB) Key-Value Store Cache

Observability

Datadog NewRelic Grafana Graylog Kibana AWS CloudWatch

Practices

Microservices REST APIs CI/CD SOLID Design Patterns Spec-Driven Development Event-Driven Design Scrum Gitflow TDD

Languages & Frameworks

Java Go TypeScript/Node.js Kotlin Python Angular React Flutter

Cloud & Infra

AWS Docker Terraform Pulumi Argo CD CircleCI Jenkins

Databases

PostgreSQL MySQL NoSQL (Firestore, DynamoDB) Key-Value Store Cache

Observability

Datadog NewRelic Grafana Graylog Kibana AWS CloudWatch

Practices

Microservices REST APIs CI/CD SOLID Design Patterns Spec-Driven Development Event-Driven Design Scrum Gitflow TDD

Experience Experiencia

Senior Software Engineer

NocNoc

Aug 2025 - Present
  • Developed and maintained the integrations that sellers use to connect to the NocNoc ecosystem (public API, Shopify, SFTP, Seller Center) — enabling product creation and updates, order registration, package generation, and more.
  • Owned the Amazon Scraper service — a business-critical microservice for product data synchronization that directly drives sales performance and marketplace reputation. Designed pull-based rate control with SQS and concurrency-limited consumers to comply with Amazon API throttling policies.
  • Built the sellers-core service from the ground up — a centralized processing layer through which all seller operations are routed and validated, enabling unified metrics, alerting, and observability across the entire seller integration platform.

Senior Software Engineer

itti (UenoBank)

Oct 2024 - Aug 2025
  • Architected and built the Insurance Manager microservice — the core policy issuance engine powering every insurance product (life, mobile, commercial, home).
  • Designed resilient integrations with legacy external providers using circuit breaker, async communication, and retry patterns.
  • Developed the backend of a mobile banking app, ensuring smooth user experience across critical processes like policy purchase, claims, and account management.

Semi-Senior Software Engineer

Emi Labs

Aug 2023 - Apr 2024
  • Built the integration layer for US and Mexico clients at an AI-powered recruitment platform serving 50+ enterprises (Walmart, Coca-Cola FEMSA, Heineken) processing 12M+ conversations.
  • Balanced client-specific customizations with a generic, scalable cross-client architecture — designing maintainable abstractions to serve diverse enterprise requirements without fragmenting the codebase.

Semi-Senior Software Engineer

Kavak

Jul 2022 - Aug 2023
  • Automated core banking processes in Kavak's fintech division (Capital), replacing manual workflows with directly profitable, high-impact solutions. Built greenfield microservices in Go, Node.js (TypeScript), and Java (Spring Boot, Hibernate/JPA).
  • Built backend services with PostgreSQL and an internal backoffice with Angular and NestJS. Observability with Datadog dashboards/alerts and CI/CD with Argo CD.

Software Dev Analyst → Semi-Senior (Promoted)

Mercado Libre

Feb 2021 - Jul 2022
  • Built Mercado Libre's new AWS IAM-inspired authorization platform — a policy-based access control system in the critical path of every MELI application, impacting millions of users.
  • Developed multi-language SDKs (Java, Go, Python, Node.js) and a Docker sidecar deployment model. Rigorous stress testing to validate performance under real-world scale and on-call rotations for production incidents.

Engineering Associate

Southworks

Apr 2020 - Jan 2021
  • Built greenfield applications end-to-end for Discovery Channel (US) using Node.js, TypeScript, and microservices architecture.
  • Infrastructure provisioning with Pulumi on AWS, CI/CD with CircleCI, and production monitoring with Datadog and CloudWatch. Earned AWS Certified Cloud Practitioner during this role.

Education Educación

B.S. in Information Systems

Universidad Nacional de La Plata (UNLP)

2017 - 2024
  • GPA: 3.6/4.0
  • Thesis: Designed and built a full-stack e-commerce platform for a university-affiliated solidarity marketplace serving 200+ local producers.
  • Outstanding Freshman Award, UNLP (2017)
  • Academic Merit Award, UNLP (2018, 2020)

University Programmer Analyst (intermediate degree)

Universidad Nacional de La Plata (UNLP)

2017 - 2020
  • GPA: 3.5/4.0 — Core CS fundamentals: data structures, algorithms, databases, software engineering, and OOP.

Certifications Certificaciones

AWS Certified Cloud Practitioner

Amazon Web Services

2020

HSK Level 3 — Mandarin Chinese

Hanban Confucius Institute

2018

Certificate in Advanced English (CAE) — C1

University of Cambridge

2016

First Certificate in English (FCE) — B2

University of Cambridge

2015