Mariano Carpentier

Senior Software Engineer · Architect · Technical Leader

Builds scalable systems, leads teams through complexity, and delivers production-ready technology end-to-end.

Comfortable in both worlds: enterprise-scale platforms (integration, delivery, reliability) and fast-moving startups (speed, iteration, product focus), backed by side projects with real-world outcomes.

Experience Projects Contact

About Me

Senior software engineer and architect with 18+ years of experience across startups, product companies, and government-scale services. Specialised in turning vague ideas into concrete, reliable systems while balancing technical depth, delivery, and clear communication.

Work spans tech leadership, frontend transformation, architectural design, and hands-on consulting. Helps teams structure work more effectively, estimate realistically, adopt sound engineering practices, and deliver with clarity rather than chaos.

Outside client work, builds personal projects to push the limits of technologies like 3D printing, software, and electronics. See highlighted projects.

Skills

A broad collection of hands-on engineering, architecture, cloud, backend, and delivery skills built over 18+ years across multiple industries.

Architecture & Leadership

System Architecture

Technical Leadership

Mentoring & Team Development

Technical Discovery & Scoping

Frontend Engineering

React

TypeScript

JavaScript (ES6+)

Modern SPA Frontends

Legacy Frontends (jQuery, AngularJS, Swing)

Backend & APIs

Node.js

Java

C# /.NET

PHP

Python

REST API Design

Serverless Backends

Authentication & Authorization

Cloud, DevOps & Security

AWS

Docker & Containers

Kubernetes

Container Security (NeuVector)

CI/CD Pipelines

Infrastructure as Code (CloudFormation)

Monitoring & Observability

Data & Storage

DynamoDB

PostgreSQL

MySQL

MongoDB

Neo4j

Caching Strategies

Platforms & Integrations

Sitecore (Certified)

Payments & Marketplace Integrations

OAuth / SSO Providers

Practices & Delivery

Agile Delivery

Estimation & Planning

TDD & Automated Testing

Code Review Practices

Refactoring Legacy Systems

SEO, Growth & Analytics

SEO (Technical & On-Page)

Performance & Core Web Vitals

Analytics (GA / GTM)

Conversion & Funnel Thinking

Experience

I’ve spent nearly two decades moving between product teams, digital agencies, and government, usually sitting where architecture, delivery, and hands-on coding intersect. Here’s the short version of that timeline.

Jun 2005 – Nov 2006

Junior Java/PHP Developer

NeoSys / C-Card · Argentina

Developed Java and PHP modules for loyalty and reward-system applications while learning enterprise Java at speed.

Built multi-module Java applications using Hibernate and Struts.
Developed features across three projects simultaneously.
Completed training in QlikView and Adobe Flex to support analytics and interactive UI components.

Jan 2009 – Nov 2012

Java Technical Leader & Senior Developer

CitiBank, DIRECTV, Swiss Medical Group (via ITResources) · Argentina

Led and delivered projects across finance, telecom, and healthcare, working on IVR systems, enterprise apps, legacy-system integrations, and continuous-integration initiatives.

Designed and developed components for CitiBank’s IVR ecosystem, plus custom tag libraries and security-hardened UI components.
Delivered DIRECTV’s DSNVS logistics/validation system and led regional assessments of core applications.
Migrated and modernised legacy Java platforms at Swiss Medical Group, introducing CI pipelines (Hudson).

Apr 2014 – Feb 2018

Full Stack Engineer / Senior Developer

Stackla & Pillar Digital · Sydney, Australia

Built social-content aggregation features and campaign apps for major media and sports clients.

Developed integrations for enterprise CMS platforms (Sitecore, Adobe Experience Manager).
Improved access-control, aggregation options, and UX telemetry.
Built and scaled high-traffic fan-voting and tipping applications on AWS.

Feb 2018 – Sep 2019

Full Stack Engineer

LawPath · Sydney, Australia

Worked across product and platform, modernising workflows around document generation, payments, and serverless APIs.

Built a new customised PDF/DOCX document-generation system.
Improved billing flows across Stripe and Chargify.
Developed serverless APIs and new marketplace + scheduling features.

Feb 2024 – Present

Independent Consultant & Founder/Builder

Independent / Darumatic · Sydney, Australia

Consultant on SaaS integrations and rapid product delivery, while building and shipping my own projects in public.

Helped Darumatic certify AutoPay’s Xero integration by iterating on subscription + marketplace requirements with their engineering team.
Integrated Stripe into a Django/Python site: cart, promotions, products, and quick turnaround iterations.
Delivered an AI-focused Campaignware session and shipped independent products: Tracking Gains (mobile), KwadHub.net (web), and Engineer Unleashed (YouTube, 5-axis 3D printer series).

Nov 2006 – Jan 2009

Java Engineer

Verizon Business · Argentina (Remote to U.S.)

Worked on mission-critical telecom systems, including migrations from C++ to Java, tooling for test-data generation, and EJB platform upgrades.

Built tools that significantly reduced engineers’ testing time, earning internal recognition.
Migrated major components of the ATLAS system from C++ to Java and became responsible for its maintenance.
Contributed to the migration of legacy EJB2 modules to EJB3.

Nov 2012 – Jan 2014

Software Engineer, Distributed Systems

MercadoLibre · Argentina

Engineer in the APICore team of Latin America’s largest e-commerce platform, working on high-throughput distributed APIs supporting millions of users.

Improved caching for the Items API, reducing web-server startup times by over 50%.
Refactored core APIs (Users, Feedback) to increase maintainability and consistency.
Executed zero-downtime Redis migrations and contributed to reliability across multiple services.

2017 – Dec 2019

Architect & Full Stack Engineer

BenchVote · Sydney, Australia

Sole architect and principal engineer of a high-traffic fan-engagement platform used by major brands, sports leagues, and media groups.

Designed the entire platform architecture and selected core technologies.
Implemented nearly all product features end-to-end.
Ensured automatic scaling, redundancy, and low-cost high availability.

Sep 2019 – Jan 2024

Senior Frontend Tech Lead

NSW Department of Customer Service (DCS) · Sydney, Australia

Led the frontend for several major NSW government services and guided a large .NET-focused team into a modern React + API architecture.

Owned the frontend architecture for Sira CTP, Australian Death Notification Service, HazardWatch, Verify.licence, and Health Licensing.
Introduced React/Redux patterns and upskilled engineers transitioning from .NET.
Managed delivery pressure, stakeholder expectations, and complex cross-team dependencies.

Highlighted Projects

Kinematics + build

5-Axis 3D Printer — Design & Firmware

Open-source 5-axis 3D printer build: custom mechanics, electronics, calibration, and Klipper/kinematics modifications (Python + C), with a custom toolpath/G-code pipeline and proof-of-concept 5-axis prints.

KwadHub — Drone Flying Spots Community

A social map for drone pilots to discover, share, and bookmark flying locations. Spots include hazards, terrain, photos, videos, privacy controls, and lightweight content workflows. Built as a modern web app with a serverless backend and scalable data model.

TrackingGains — Cross-Platform Training App

A fast mobile workflow for real training: sets, reps, weights, timers, exercise history, and progress views. Built around structured sessions and superset support with a clean UI and pragmatic UX choices.

Contact

Open to consulting, contracting and collaborations. Feel free to send me a message using the form below, or connect through my public channels.

Find me on:

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