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Matias Fuentes

@matiasfuentes1

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Backend engineer at Kerplunk Studio building production SaaS platforms and multi-tenant photo sales with face search.

Argentina

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What I'm looking for

I'm seeking a full-time remote role.

At Kerplunk Studio, I design and ship production SaaS platforms for paying clients. For FotoEscurra and FotoBayo, I built a multi-tenant sales platform that runs two photography businesses from one codebase, with AWS Rekognition face search, payments through four providers in two currencies, and electronic invoicing.

For Medusa Estudio, I built and shipped a photo marketplace for event photographers selling digital and printed photos. It handles checkout and order fulfilment, with automatic image compression and watermarking, and is in production.

Before Kerplunk Studio, I was a core engineer on Staﬀbase search, working on a multi-tenant Elasticsearch platform for enterprise tenants. I also explored semantic retrieval using embedding models, Azure AI, Elasticsearch vector search, and Marqo.

At Delivery Hero, I delivered automated payment calculation and real-time rider payments, replacing manual processes. Earlier, as Head of Backend at Atem, I owned the MVP backend architecture, and I now also build cc+, open-source tooling that orchestrates parallel Claude Code sessions.

Experience

Work history, roles, and key accomplishments

Current

Staff Backend Engineer

Current

Kerplunk Studio

Dec 2025 - Present (10 months)

Independent software consultancy building production SaaS platforms for paying clients, including a photo marketplace and a multi-tenant sales platform for photography businesses.

TypeScript Next.js React NodeJS Prisma PostgreSQL SQLite Python AWS ECS Fargate AWS CDK GitHub Actions

Senior Software Engineer

Staffbase

Mar 2024 - Nov 2025 (1 year 8 months)

Core engineer on a multi-tenant Elasticsearch platform holding millions of documents for hundreds of enterprise tenants. Built proofs of concept for semantic retrieval with embedding models on Azure AI and Elasticsearch vector search.

Java Kotlin Go Elasticsearch Azure Terraform

Head of Backend

Atem

Sep 2022 - May 2023 (8 months)

Owned backend architecture for the company's MVP, designing a microservice architecture using Polygon as the source of truth for carbon retirement records. Mentored backend engineers and set engineering practices.

Go Polygon Bazel MongoDB AWS CDK Docker GitHub Actions

Staff Software Engineer

Gorillas

Feb 2022 - Jul 2022 (5 months)

Internal consultant to two engineering teams, unblocking delivery and driving tribe-level technical initiatives. Wrote RFCs to align teams on cross-team decisions and mentored backend engineers.

Kotlin Spring Boot MongoDB AWS Kubernetes

Software Engineering Manager

Delivery Hero

Jul 2019 - Nov 2021 (2 years 4 months)

Grew the team from two to eight engineers as hiring manager, owning rider payments. Delivered automated payment calculation and real-time rider payments, handling over 1 million requests per day across 45 countries.

Kotlin Spring Boot AWS SQS SNS Kubernetes Terraform Grafana Prometheus New Relic Kibana Sysdig

Senior Software Engineer

Delivery Hero

Feb 2018 - Jul 2019 (1 year 5 months)

Built a Kotlin and Spring Boot microservice for core business calculations with event-driven processing on AWS SNS/SQS. Worked on a Spring Batch job and the core Java application for global logistics.