About / 01

Staff engineer for systems that need to scale.

I build data platforms, distributed systems, and cloud architecture with a focus on clear trade-offs, measurable reliability, and useful outcomes.

Dublin, Ireland11+ years in softwarematt@koltunm.com
25 GB/minpeak ingestion designed
99%data completeness achieved
10×ETL memory reduction
70%storage cost reduction

Experience

2014 — now

Mar 2022 — now

Vectra AI

Staff Software Engineer

Technical lead across three teams, owning ingestion, ETL, and lakehouse systems.

Designed a platform processing up to 25 GB/min, improving completeness from 80% to 99% and reducing latency from 15 minutes to roughly one.

Feb 2021 — Mar 2022

Vectra AI

Senior Software Engineer

Cloud and infrastructure lead for the company’s first SaaS platform.

Built Terraform-based architecture and automated multi-tenant provisioning; moved an edge gateway from Lambda to EKS.

Jan 2020 — Oct 2020

No Drama Pyjama

Founder · Software Developer

Founded and operated an e-commerce SaaS product end to end.

Built a Next.js PWA and containerised Node.js platform on AWS, including payments, authentication, CI/CD, analytics, and caching.

Mar 2014 — Jan 2020

Amazon Web Services

Support Engineer → Systems Engineer

Operated and automated mission-critical infrastructure across tens of thousands of servers.

Reduced 12-hour operational workflows to under 15 minutes and built monitoring, failover, replication, and event-driven automation systems.

Capabilities

Selected toolkit

Architecture

Distributed systems · Data platforms · System design · Technical leadership

Data & infra

ETL/ELT · Streaming · Delta Lake · Kafka · S3 · High-throughput ingestion

Cloud

AWS · Azure · Kubernetes / EKS · Terraform · Docker · Serverless

Build

Python · TypeScript · Rust · Java / Scala · FastAPI · React · Next.js

AI

MCP · RAG · Agent workflows · Prompt engineering

Education

B.Sc. Computer Applications
Dublin City University · 2014 — 2019

Let's talk