01
Network provisioning at scale
Helped build a platform that automates enterprise network and Voice over IP provisioning. React and ServiceNow on the front end, Python/FastAPI integrations with cloud APIs and Azure infrastructure through Bicep.
Freelance software developer · technical leader
Turning complex technology into software that works for the business.
Hello, I’m Sander Hahn. As a software developer and technical sparring partner, I help companies build new products, modernise core systems, and make architectural decisions that last.
Connect with me on LinkedInAvailable for technical leadership, partnerships and consulting
Currently
What has my attention now.
- Integrating and refining the TODO workflow.
- Applying and comparing Claude, Codex and Gemini in practical development work.
01 / Profile
Technical range, entrepreneurial mindset.
With over twenty years of experience, I move comfortably between product, architecture and delivery. I thrive in greenfield projects and complex environments where legacy systems, integrations and business processes meet. My approach is curious, pragmatic and focused on visible progress.
20+years of experience
15+organisations
MScComputer Science · VU Amsterdam
02 / Selected work
Systems with real operational impact.
02
Video as a central platform
Worked on a greenfield video-as-a-service platform that allowed multiple media brands to integrate videos, channels and series while one central team continuously developed the platform.
03
Modernising without disruption
Renewed webshops, administrative backends, CRMs and workflow integrations—from consolidating authentication and orders to multitenancy, real-time communication and API-driven automation.
03 / Expertise
Broadly capable. Focused on what matters.
Technical leadership
Architecture decisions, engineering quality and team guidance.
Product engineering
From first prototype to a dependable production platform.
Integration & automation
APIs, workflows and infrastructure that connect systems.
Modernisation
Evolving legacy systems step by step with manageable risk.
TypeScript · JavaScript · Go · Python · Ruby/Rails · Elixir/Phoenix · PostgreSQL · Docker · Azure
04 / Selected experience
A career built on adaptability.
2022—2026Software DeveloperKPNTelecommunications
2021—2022Freelance DeveloperCharper BonarooSoftware House
2018—2019Python / ServiceNow DeveloperDivider / KPNTelecommunications
2017—2018Elixir / Phoenix DeveloperDPG MediaMedia
2013—2015Freelance DeveloperHackers & Founders AmsterdamSoftware House
2000—presentSoftware DeveloperStartups, scale-ups and enterpriseSoftware House