emanuel@comsa:~$ // Zandvoort, NL · Remote
SENIOR SOFTWARE ENGINEER · 20+ YEARS IN PRODUCTION

Emanuel Comsa

I make Ruby & Rails systems fast, lean, and boringly reliable. Back-end architecture · API performance · React front-ends · SRE
Stylized portrait of Emanuel Comsa // fig. 01 — the engineer himself
01

Proof of work

measured in production, not in theory
$50K/mo
infrastructure savings unlocked at Deliveroo by optimising core services
60%
load-time reduction across 100+ endpoints of a 4M-line legacy app
100M+
rows of Postgres data architected for daily full-table updates
200K+
visitors per day served by microservice-based sites I built
2,000req/s
burst capacity of a mobile API designed and shipped in Rails
2,600+
RSpec tests written to bring an untested codebase under control
02

git log --career

2005 — present · 11 commits
commit d3adb70 Aug 2024 — present Amsterdam Area

Founder

DeadBro — self-employed

  • Founded and built a Rails-only performance monitoring platform that is easy to understand and affordable to keep running
  • Built request tracing down to the view, N+1 detection with source line numbers, error tracking, background-job monitoring and uptime checks in one place
  • Designed pricing around tracked requests rather than hosts, with the platform hosted on EU bare metal
  • Operate as a solo founder and use DeadBro to monitor DeadBro in production every day
Ruby on RailsAPMObservabilityEU Bare MetalSolo Founder
commit e3a1b09 Apr 2025 — present Copenhagen · Remote

DevOps Team Lead

simply.tv — TV metadata company

  • Lead a team of 4 engineers owning the full AWS infrastructure stack for a TV metadata platform
  • Designed and maintain multi-region ECS/RDS deployments with automated failover and zero-downtime blue-green releases
  • Reduced AWS spend by 34% through right-sizing, spot-instance strategies and Reserved Instance planning across EC2 and RDS
  • Built CI/CD pipelines in GitHub Actions for Rails services
  • Implemented DeadBro APM across all applications, giving the team consistent performance monitoring and error visibility
  • Drove a security hardening initiative: VPC segmentation, IAM least-privilege audit, and encrypted RDS snapshots with cross-region replication
AWSRuby on RailsMySQLECSTerraformGitHub ActionsDeadBro APM
commit a8f3c21 Dec 2022 — present Amsterdam · Remote

Senior Software Engineer

ABOSS — organisation for artists made easy

  • Maintain and extend the Rails platform powering artist back-office workflows
  • Tuned API performance to keep the product fast as usage grows
  • Partner directly with product owners to shape and ship new features
Ruby on RailsPostgresNode.jsHerokuAppSignal
commit 7d91e04 Jan 2018 — present Zandvoort, NL

Senior Software Consultant

I Play'd It — self-employed

  • Built a Rails CMS ingesting 10M+ row product feeds from retailers and affiliate networks, generating automated product comparisons
  • Designed a Postgres architecture handling 100M+ rows with daily full updates
  • Shipped 10+ server-rendered React/Next.js sites on a Rails API; two of them handle 200,000+ visitors a day
  • Cut page loads to under 500 ms by distributing the application across servers
RailsNext.jsReactPostgresMySQLDatadog
commit 3b6fa9d Jan 2023 — Apr 2024 Amsterdam · Remote

Technical Lead

Sparqle — e-cargo-bike logistics

  • Shaped a SaaS platform from inception alongside the founders
  • Built Ruby microservices and Nest.js back-ends for scalability and stability
  • Integrated e-commerce flows and crafted React front-end features
NestJSReactRailsAWS LambdaPostgres
commit f2c480e Sep 2021 — Dec 2022 London, UK

Software Consultant & SRE

Deliveroo — contract

  • Realised USD 50,000/month in savings by optimising core services and infrastructure
  • Extracted 200,000+ lines of code from the monolith into new microservices
  • Optimised 30+ core endpoints; cut database load by deprecating features onto DynamoDB
  • Improved EC2 resource usage 10% with Terraform policies; built the logging, alerting and monitoring that sped up incident response
RailsDynamoDBTerraformNext.jsDatadogSentry
commit c19d573 Apr 2018 — Sep 2021 Amsterdam Area

Senior Software Engineer

ABOSS — artist back office system

  • Inherited a 4M-line legacy app with zero tests and no docs — modernised it with 2,600+ RSpec tests
  • Cut load times 60%+ on 100+ endpoints; dropped memory from 20GB to a steady 4GB while usage doubled
  • Shipped 200+ features: Stripe payments, Devise auth, Sidekiq queues, partner microservices
  • Built a mobile-facing Rails API handling bursts of 2,000+ requests per second
RailsReactStripeSidekiqPostgresDevise
commit 91e7b32 Oct 2015 — Apr 2018 Hilversum, NL

Senior Ruby on Rails Developer

Shop2market — online sales tracking

  • Built a Golang service streaming and merging datasets up to 1GB and 400,000+ product JSONs on demand
  • Managed 5 Go services processing tens of millions of records daily into user-defined feeds
  • Shipped a UI for loading, reading and batch-editing streamed datasets in the browser
GoRailsReactSidekiqTerraform
commit 0000001 Nov 2014 — Sep 2015 Timisoara, RO

Ruby on Rails Software Engineer

Softvision — initial commit

  • Led a team of 5 building a college-fund app end to end: architecture, infra, auth, payments, UI
  • Shipped features on a HIPAA-compliant medical application for a US client
  • Mentored student trainees through the internship program
RailsJavaScriptHerokuRSpec
commit b44c219 Apr 2011 — Nov 2013 Remote

Full Stack Developer

Gradus Ltd — full-time

  • Built web applications with PHP and MySQL on the back-end; HTML, CSS and JavaScript on the front
  • Managed Linux servers and authored NGINX configs to serve multiple domains
PHPMySQLJavaScriptNGINXLinux
commit 0000000 Jan 2005 — Mar 2011 Remote

Full Stack Developer

Freelancer — independent contracts

  • Delivered 50+ web applications in PHP for international clients on a contract basis
  • Designed and built UIs for 50+ websites using HTML and CSS
  • Managed Linux servers and configured NGINX for multi-domain hosting
PHPMySQLHTMLCSSNGINXLinux
03

Side quests

built, shipped, and kept alive
~/projects/01

DeadBro ↗

Website monitoring and alerts — know the moment your site flatlines.

deadbro.com ~/projects/02

I Play'd It ↗

Gaming site on a custom CMS crunching 100M+ rows of product data.

iplaydit.com ~/projects/03

KeepMyLink ↗

Permanent link storage. Save it once, find it forever.

keepmylink.com ~/projects/04

BundleUpdate ↗

Dependency update service for Ruby on Rails projects — keep your Gemfile fresh and audited.

bundleupdate.com ~/projects/05

RubyDev.ro ↗

Company profile for a Romanian Ruby & Rails development shop.

rubydev.ro ~/projects/06

DMCA Plus ↗

Manage and respond to incoming DMCA takedown notices — organised, tracked, and resolved.

dmcaplus.com ~/projects/07

AmericanFamilyFans ↗

Fan community and episode guide for the American Family TV series.

americanfamilyfans.com

➜ ~ Have a slow Rails app, a gnarly migration, or a product to build?

[email protected]
© 2026 Emanuel Comsa LinkedIn ↗ Blog exit code 0 — thanks for scrolling