Principal engineer & architect · 15 yrs · Stockholm

I build complete systems. You own them.

15+ years shipping production systems, from circuit boards to multi-region Kubernetes. Fixed-price product delivery, or embedded in your team as a senior engineer, solo or alongside your engineers.

Get in touch See the work

Elinor WigertzWigertzTech AB

Whatever the slice, I own it end to end

a filled cell is a layer I owned on that system

Case

HardwareFirmwareBackendInfraPlatformApp

Delivered

HWFWBEInfraPlatApp

Mud MastersSolo, fixed price
Sensor stations, firmware, backend, frontend and deployment, with 50+ units in the field in ten weeks
LifeeCo-founder
A Bluetooth bracelet from circuit board to its own production line, CE certified, 1000+ units shipped
ServerpodEmbedded, 5 months
A private link between the control and tenant clusters, a tested infrastructure pipeline, canary rollouts and the file storage product
SpotifyEmbedded, ongoing
A solo-built global capacity tracker and safe retirement of faulty machines, on a fleet serving 11–12M backend requests per second
Volvo CarsEmbedded in DevEx
Developer self-service, a release process and 20–30% lower compute costs on a shared platform serving 100+ apps in 4 regions
DstnyPlatform architect
A multi-region platform from scratch across 4 regions, in the cloud and on-prem at once, and a white-label login built end to end
VinterljusWith partners, fixed price
Wall-projected multiplayer game, hundreds of players a night for a month
PugstormSolo
Automated builds and Steam releases for the studio behind Core Keeper, with nothing running when nobody builds

Where the work has run

Shipped for these teams

Funded startups and scaleups through to global enterprises, across developer platforms, telecom, games, automotive and consumer hardware.

How we work together

Two ways to engage

Hand me the whole problem, or drop me into your team.

BuildFixed price

Product & Solutions

I own the full build and hand it over working. Hardware, software, or any combination, and your team runs it after I leave.

Full system ownership, no coordination between specialists
1000+ units shipped, platforms running in production
Clear deliverables, source code, full handover

PCB & hardware / Embedded C / FreeRTOS / Wireless (BLE, LoRa, Cellular) / React Native / Next.js / Node.js / TypeScript / CE certification

You want a working system in weeks, not a team to manage.

From €40kFeasibility from €6k · 6–10 weeks

Details

JoinFixed scope or embedded

Expertise & Augmentation

I join your team as a senior engineer or architect. Same tools, same standups, same codebase, delivering from week one.

Expert consultation for a specific problem, days to weeks
Embedded as senior engineer or architect, months
Independent from day one, no ramp-up lag

Platform engineering / Kubernetes / GitOps / GCP / AWS / Azure / Go operators / Dart / Serverpod / CI/CD / Full-stack / Security & compliance

You need depth your team doesn't have, without a permanent hire.

From €5kFixed-scope engagements · One week to 12+ months

Details

Both come with the same decisions and the same execution, and both end with you owning what was built.

From the cases

The decision, then what shipped

Each case is written as the constraint, the call I made, and what shipped. Below is the point of each, one line per case.

All eleven cases

Featured work

Built, shipped, handed over

Read the cases

50+ units delivered

Real-time scoring: sensor to screen

Real-time scoring system for European fitness competitions. Off-the-shelf hardware, embedded software, web frontend. 50+ production units delivered.

Case study available

1000+ units shipped

Lifee: an activity game children wear

Circuit board, firmware, the app's Bluetooth link and the production line tooling. 1000+ units shipped to schools and consumers.

Hardware + firmware + BLE

10–20+ simultaneous players

Vinterljus: interactive festival game

A multiplayer game projected four storeys up for a public light festival, played from phones with nothing to install. 10–20+ players at once.

AWS + MQTT + Next.js

About

One person, the whole stack

15+ years building production systems across every layer. PCB design and firmware at one end, managed cloud platforms and enterprise Kubernetes at the other. I've worked embedded systems, IoT hardware, mobile apps, backend services, DevOps, and cloud architecture professionally, not as side projects.

I work two ways. Fixed price, where I own the build and hand back something your team can run without me. Or embedded in your team as a senior engineer or architect, covering what it cannot cover itself. Either way I make the technical decisions and then I execute on them.

Running WigertzTech AB since 2023. Based in Stockholm, on-site, hybrid or fully remote. Contract, team augmentation, or fixed-price delivery.

I ramp up fast in new domains

Infrastructure at scale: Capacity planning and safe machine retirement for Spotify's global fleet, at 11–12M backend requests per second.
Developer platforms: A private link between Serverpod Cloud's clusters, canary rollouts, and file storage shipped as a paid product.
Consumer hardware: Co-founded Lifee and shipped 1000+ bracelets, from circuit design through CE certification.
Automotive security: PCI compliance and CVE management for Volvo's global platform across 1000+ nodes.
Game infrastructure: Automated builds and Steam releases for the studio behind Core Keeper, on machines that cost nothing when idle.
Telecom platforms: A platform across four regions, in the cloud and on-prem at once, with a white-label login for enterprise customers.

Next step

Tell me what you're building

Send me a short description of the problem and I'll tell you whether I'm the right fit, what it would cost, and how long it would take. No pitch deck.

Email me Call +46 70 753 73 78

Email: elinor@wigertztech.se
Phone: +46 70 753 73 78
LinkedIn: elinorwigertz