gl.aser software & gestaltung

What I offer

  • Legacy modernization

    I bring grown systems safely onto current technology — incrementally, test-covered, without drama in production.

  • Interim CTO & technical leadership

    Strategic technical responsibility, board-level reporting, hiring and mentoring — for exactly as long as you need it.

  • Hands-on development

    Ruby on Rails, Elixir & Phoenix, done well: architecture, data modeling, APIs, tests.

  • DevOps, infrastructure & hosting

    Containers, CI/CD, infrastructure as code, Linux — from bare metal to cloud.

  • Team coaching & developer productivity

    Pair programming, TDD, agile processes that fit — teams that ship more, with more joy.

Background

2+ years
Elixir · Ash · Phoenix · Typescript · Python · AI tools
20+ years
Team leadership · Agile development · Ruby on Rails · Javascript
25+ years
Web development · Hosting · SaaS · Marketplaces · E-commerce · Payment · APIs · CMS
28+ years
Software engineering · Consulting · Coaching · Databases · Linux server administration

Selected projects

OvulaRing — VivoSensMedical GmbH, Leipzig

since 2022

Senior Ruby & Linux/DevOps consultant: modernizing the entire legacy platform — mobile API and web apps — from its 2014 state to current technology. Rails 3 → 7, containerized development and deployment with Nomad, infrastructure as code, a much simpler system architecture — removing deployment downtime, and greatly reducing hosting costs.

Ruby on Rails · MongoDB · Hotwire · Docker · Nomad · Ansible

florio HAEMO — Die Produktmacher / SOBI, Munich

2021 – 2022

Lead developer of a web application physicians use to record hemophilia treatment data and report it to the German Hemophilia Register. Technical lead of a team of 4–6, design of architecture and data model, critical components such as a SOAP API client with 2FA — under medical-device standards ISO 13485 and ISO 27000.

Ruby on Rails · PostgreSQL · Hotwire · JSON & SOAP APIs

Wimdu — Berlin / Lisbon

2015 – 2018

From senior Rails developer to technical product manager to interim CTO at what was then Europe's leading vacation-rental marketplace. Technical leadership for up to 25 developers, the transition from a monolith to service-based architecture, payment integrations in multiple currencies, GDPR and KYC compliance.

Ruby on Rails · ElasticSearch · Redis · AWS

Detailed CV and references available on request.

Rates

€185 per hour
€1,450 per day

Long-term engagements: rates negotiable.

The first day is a trial day: we work on your real tasks — you decide afterwards.

Book a first day

Why work with me

Because you need a versatile, experienced, communicative engineer with out-of-the-box ideas on your team.

Because you have deadlines to meet — and I can help your team accelerate.

Because I've got taste: I recognize good design, and I can fix a bad one. I care about the details that matter.

Because I love what I do — which makes me surprisingly efficient.

Because I believe in getting things done well and thoroughly: test-driven and explorative programming are both valuable tools.

And finally: because people who've worked with me loved it.

Clients from many industries

  • BMW
  • Otto
  • tesa
  • Novartis
  • Wella
  • Metten Stein+Design
  • VivoSensMedical
  • DistriSmart / Papersmart
  • Waldkonzepte
  • evergreening landschaftsarchitekten
  • Kirchner Musikmanagement
  • Fachhochschule Magdeburg