Julian IrigoyenBuenos Aires
Backend · Full-stack · DevOps · Agentic AI

I love a good challenge.

I'm a 31-year-old engineer from Argentina. I've spent the last eight years building applications for a wide variety of companies: large consulting firms, software factories, small startups and well established product companies.

From backend — Java and C# on the object-oriented side, Scala and Rust on the more functional one — to full stack (vanilla, React, Vue), DevOps with AWS/GCP/K8s, and AI engineering with Claude Code, Codex, and more. I've refactored large monolithic applications into microservice-oriented systems, built full-stack web applications from scratch, and set up productive agentic workflows for large corporations and small businesses.

Julian Irigoyen
Julian Irigoyen · Buenos Aires
About

Hi

The world has changed. Building software is getting faster, and what makes a difference more than ever are the people behind the ideas. Understanding what they want to do, why it matters to them, and helping make it happen.

After an amazing two years at TrueML, I started the founder journey with Supersolid, together with my former boss and mentor Dmitry Sabanin and my best friend Emiliano Migliorata. We’re building in fintech and quantitative trading, and we work with other founders as a cofounding team on their ideas.

I tackle problems methodically, and I rely a lot on my team. I like failing fast, shipping small concrete iterations, and learning from what actually happens. I’m interested in simple and complex problems alike. A lot more so in the person and the idea behind each problem.

My goal as an engineer is to bridge the gap between an idea and its implementation. Make it real, make it work, and keep improving it. Below is what I’m building now, the client work already shipped, and the hobby projects and experiences that brought me here.

01—05Nowlive · in build
06—09Also shippedclient work
10—15Hobby projectssix reasons why
My patheight years
Now · 01—05

Being built or running as you read this.

Check any link to find out more!

live private in build
01live · supersolid.co
Supersolid — live site

Supersolid

the studioWhere the rest of this comes from

The studio I started this year with Dmitry Sabanin, my former boss and mentor, and Emiliano Migliorata, my best friend. We build our own products, and we cofound with other founders on theirs.

02live · unattended and continuously developed
DJINN — live site

DJINN

autonomous agentWhat I would show you first

An open-source agentic workflow platform. In continuous development since January 2026 and running unattended on a cloud VM since June, reachable through Slack (and more channels), trusted with real infrastructure: feature development and reviews, watchdogs, nightly digests, incident detection, and a knowledge store it maintains itself.

03live · poorhedgefund.com
Poor Hedge Fund — live site

Poor Hedge Fund

systematic · self-funded

A self-funded systematic fund. An Erlang engine runs strategies against live orderbooks, every market and instrument its own actor, with a web console and a native Mac and iPhone app built to view and manage platform processes. Our own capital, our own risk.

Erlang/OTP · React · SwiftUI · live orderbooks · engine privateRead the thesis
04live · app store
iOS · on the App Store

Keonda

social marketplace

A social marketplace for the sea: a live chart of boats, chat between guests, captains and providers, and a marketplace underneath it. Live in the App Store.

Expo · React Native · Fastify · Postgres · in productionGet it on iOS
05live · ibizaluxy.online
Luxy — live site

Luxy

concierge, ibiza

A concierge for Ibiza. A WhatsApp agent takes a request in plain language — a table, a boat, a villa — and turns it into something bookable, with checkout attached. Complementary to Keonda. Webapp live.

Also shipped · 06—09

Client work. Finished, handed over, up and running.

06live · half-productions.vercel.app
Half Production — live site

Half Production

events, ibiza

A multilingual event-production site for an Argentina-to-Ibiza crew, with the public brand, Dharma, Boiler Cook, crew pages, print-ready QR assets, and an internal booking desk that turns Ibiza calendars, artist fees and warm-path relationships into a shortlist for monthly guest slots.

07live · in daily use
Speed Ibiza — live site

Speed Ibiza

operations software

CRM built for a rising logistics and beverage distribution firm in Ibiza: route planning, customer records, order intake, collections, stock and invoicing. A field app for a phone in a van, an admin desk for the office.

08live · innovalportb2b.com
Innovalport — live site

Innovalport

b2b importing

An import platform for Argentine companies buying from international suppliers: catalogue, landed-cost simulator, wholesale orders and logistics, wired into MercadoLibre and Tiendanube.

09live · outflow.com.ar
Outflow — live site

Outflow

buenos aires

A DJ school and sound rental house in Buenos Aires. Courses, equipment and bookings, in Spanish, for a business that lives on its reputation.

Hobby projects · 10—15

The more you
f around,
the more you
find out.

Things I wanted to use. Problems that annoyed me. An interview challenge that got out of hand. There's a why behind every one.

The more you f around, the more you find outAn illustrated take on the meme. Follow the six project links along the rising line. This is a joke, not measured project data.F around →Find out →
The unofficial law of side projects. Pick a point.
The granite towers and snowfields of Fitz Roy in PatagoniaFitz Roy · Patagonia
10 / Trekking & researchLive · jtreks.co

jtreks

Why?

Because I like trekking. Mountains are amazing, and finding the right information to plan a hiking trip was annoyingly difficult.

So I built trekking guides with traceable sources and 3D route maps from real satellite elevation data. The information I wanted when planning my own trips.

Research · Satellite terrain · 3D mapsPlan a trek ↗
Ascenso's cover art for Volcán LanínASCENSOClimb the real mountain.Volcán Lanín · 3,776 m
11 / Mountain simulationWebsite live

Ascenso

Why?

Because it's fun. Game development exposes you to key engineering problems, but it's also an art: a way to tell a story and teach something valuable.

A playable climb of Volcán Lanín in Unreal Engine 5. Real satellite terrain, the Tromen route, and decisions about weather, stamina, and when to turn back.

Unreal Engine 5 · C++ · SRTMExplore Ascenso ↗
IMHO real estate search interface
13 / Real estateLive

IMHO

Why?

Because searching for a home in Mar del Plata was tedious. The tools and the whole process felt archaic.

Find a home in Argentina by describing what you want. Property scrapers feed a natural-language search, with a second model checking each extraction.

Next.js · Supabase · FastifyExplore IMHO ↗
Pushy / delivery system
APIQueueWorker
↗ Email↗ Push
Templates live outside the codebase.
14 / InfrastructureReusable library

Pushy

Why?

An interview challenge I got a little carried away with. It became a library I reuse whenever a project needs notifications out of the box.

Email and push delivery with a Rust API, queued background workers, and templates that can change without an application deploy.

Rust · Axum · Redis · SQSUsed in my own projects
15 / Music, audio & visualsPersonal toolkit

Hermes Thrice

Why?

Music is an important pillar in my life. I like finding ways to have more fun producing music through technology.

Hermes Thrice Worlds brings together the musical, audio, and visual tools I build for my own creative process.

Library analysis & search
Find music by tone, BPM, and genre.
Drums, beats & basslines
Tools for making rhythms and basslines.
Music to visuals
Engines that turn music into visuals, and more experiments in sound and image.
The path that brought me here

Built with good people.

Consulting firms, software factories, startups, and product teams. Argentina, the US, and Europe. Open a role for the work behind it.

2026 — PresentSupersolidCurrentFounder & Principal Engineer
Mar 2026 — PresentBuenos Aires, Argentina — Remote

Cofounded with Dmitry Sabanin and Emiliano Migliorata. Own products in fintech and quantitative trading; cofounding engineering for other founders.

  • Building a systematic trading operation on an Erlang platform powered by agents, using our own capital.
  • DJINN, an open-source agentic workflow platform — in continuous development since January 2026 and running unattended on a cloud VM since June, reachable through Slack, supervised by pm2 and trusted with real infrastructure: watchdogs, nightly digests, incident detection and a knowledge store it maintains itself.
  • Around fifty purpose-built ops scripts, each runnable dry, each reporting to Slack; per-repo deploy keys scope exactly what the agent is allowed to touch.
2025 — 2026TrueMLSenior Software Engineer II
Mar 2025 — Aug 2026United States (Remote)Agentic workflows team

Agentic workflows team. Promoted from Senior Software Engineer; platform engineering across Java, TypeScript, Scala and Go.

  • On the agentic workflows team throughout — automating collections workflows end to end.
  • Designed and shipped the authorization platform on AWS Cognito — adopted by the legacy estate and built into new applications and services across the company.
  • Led the workflow engine migration from Camunda to Netflix Conductor, saving $200k.
  • Built the bankruptcy monitoring system for collections compliance in the legacy Scala monolith. The failure mode there was regulatory exposure, not cost.
  • Designed the collector shim bridging the legacy estate to One True Platform, the next-generation system; handed off to the team.
  • Built the partial payments flow, which drove hundreds of thousands in revenue across tax season.
  • Built CI/CD pipelines on GitHub Actions, Kubernetes, Helm charts and ArgoCD.
2024 — 2025TrueMLSenior Software Engineer
Mar 2024 — Mar 2025United States (Remote)Agentic workflows team

Agentic workflows team. Platform and infrastructure work across the estate, leading to promotion to Senior II.

  • Maintained legacy code across Java, TypeScript, Scala and Go — designing, implementing, testing and deploying applications across all four.
  • Refactored and restored an aging support application (TypeScript/NestJS) for on-site agents, improving performance and agent satisfaction.
2021 — 2024ExperoBackend Developer — Rust & .NET
Aug 2021 — Jan 2024Houston, United States (Remote)

Developed portfolio management application for IHS Markit.

  • Built APIs and data processing workflows for capital-intensive industries and markets
  • Worked with C#, Python, SQL, Rust in an event-driven architecture
2022 — 2023Fractal TechnologyLead Developer — Scala & Akka
Jan 2022 — Jan 2023United Kingdom (Remote)Concurrent with Expero

Built String3, a Layer 1 blockchain system implementing the Actor model with the Akka framework.

  • Gained deep understanding of decentralized systems while building an End-to-End Encrypted Blockchain and Decentralized Peer-to-Peer Electronic Cash System
  • Joined as support developer, progressed to lead development role
  • Improved system performance and resolved critical bugs
  • Led onboarding and knowledge transfer to new development team, successfully handing off the project
2021 — 2021Alma FintechFull Stack Developer — React & Scala
Jan 2021 — Sep 2021Buenos Aires, Argentina (Remote)

End-to-end development of Daruma, an electronic wallet system.

  • Involved in the end-to-end development of core features, working with the client to define and code (Design + FE + BE + QA) new functionality
  • Maintained legacy systems and provided production support
2020 — 2021TiendanubeBackend Developer — Scala & Akka
Sep 2020 — Jan 2021Buenos Aires, Argentina (Remote)

Developed reactive microservices for Latin America's largest e-commerce platform.

  • Implemented Actor model using Scala, Play Framework, and Lightbend's Akka libraries (Akka Typed, Akka Persistence, Akka Projection, Akka Streams, Akka Cluster Sharding)
  • Enforced Domain Driven Design, Test Driven Design, and CI/CD principles
2019 — 2020IntiveFull Stack Developer (Scala, Play & Akka)
Oct 2019 — Sep 2020Buenos Aires, Argentina

Developed services for the Mosaic Energy account.

  • Worked with Scala and Java 8 on service development and quality assurance in an Agile (SCRUM) environment
  • Responsibilities included new feature definition and development, code maintenance, QA, production support, and tooling investigations
2019 — 2019GlobantJava Developer
Feb 2019 — Sep 2019Buenos Aires, Argentina

Microservice development for the Disney account.

  • Worked on microservice development with Java 8, Spring, Spring Boot, Spring Integration, Maven, MariaDB, Amazon DynamoDB
  • Gained experience with web automation tools such as Selenium
The full CV
Available

Tell me what has to work.

Backend, platform, or an agent that has to hold down the fort. I'm in Buenos Aires and I've worked remotely with US and European teams for most of eight years.

dev@supersolid.co · Buenos Aires · Remote US / EU ·