2022Advinans · software engineer
- Designed and built a complete feature end to end: purchasing and reselling SF cinema tickets for companies.
$ whoami
Andreas Coroiu
Software engineer and tech lead. Independent through Pear Programming AB, currently leading the Platform team at Bitwarden, across its web, browser and desktop clients and the Rust SDK that also powers mobile.
Tech lead and engineer, both at once. I don't stay in one lane: I follow problems across the stack and fix them where I find them, mostly in the plumbing between things: the SDK's core runtime, language bindings, generated API clients and repo structure. And I lead: aligning teams on architecture and ownership, and sharing what I learn so the whole team moves faster.
“My main goal and strength is the ability to understand the underlying nature of any problem.”
## what i do
Client platform & architectureShared foundations for large, multi-client TypeScript codebases: repo structure, module boundaries and team ownership. A platform product teams can build on without thinking about it.
Rust & cross-platform integrationThe core runtime every SDK developer builds on, and the path from there into web, desktop and mobile clients: language bindings, IPC, and API clients generated straight from the server's spec.
Hands-on technical leadershipLeading from the keyboard and across teams: defining the problem, prototyping the options, aligning people on architecture and ownership, and sharing knowledge so the team moves faster. The company name is not an accident.
## where i work
web app
browser ext.
desktop
mobile
shared typescript platform
rust sdk · core platform, bindings & ipc
generated api bindings
server apis
Bitwarden is zero-knowledge: the server never sees your data, so the real work happens in the clients.
## work
$ git log --oneline bitwarden
sep 2025Tech lead, Platform · core SDK runtime, cross-repo structure, ownership boundaries, architecture decisions
2025Rust SDK integration & IPC · the shared Rust core in the clients
2024Upstream to passkey-rs · contributions to the open-source passkey crate
2023Led passkeys in the clients · from first definition to shipped feature
jun 2022Joined as software engineer · through Pear Programming AB. First stop: the Component Library
$ git log --oneline --before=2022
2020 – 2022Prisjakt · senior developer via tretton37
- Part of a task force solving important cross-domain challenges.
- Set up a new B2B department, coordinating with existing departments to get to market quickly, following lean startup.
- Drove the team-topology work for owning a core platform service.
- Microservices on GCP: Cloud Functions, Cloud Run and Kubernetes. Python first, then TypeScript as the primary language.
2017 – 2020Volvo Trucks · lead developer via Combitech
- Architectural design and implementation in an agile team, in close collaboration with the project's senior architect.
- Kept architectural artifacts in step with the product domain, and used them to plan work by comparing the ideal implementation with the actual one.
- Tech lead: kept in sync with other teams, supported product owners as domain expert, and made sure every team member could take responsibility for the product.
- ASP.NET Core and Angular, deployed to a Kubernetes-based OpenShift cluster.
## education
2012 – 2017M.Sc. Computer Science, LTH · Lund University
- Thesis at Combain Mobile: “A Platform for Indoor Localisation, Mapping, and Data Collection using an Autonomous Vehicle”. Built the MVP on the Robot Operating System (ROS), with a web interface for operating the robot.
- Alongside studies: full-stack web development at Combain Mobile, Lunicore Studentkonsult and We Know IT.
## toolbox
- stack
- Rust · TypeScript · C# · Angular · ASP.NET Core · GCP · Kubernetes
- languages
- Swedish (native) · Romanian (native) · English (full professional) · Japanese (elementary)
## off the clock
pico-linkA USB-to-Bluetooth audio dongle with a screen. Shows up as a plain sound card, streams LDAC to your headphones, and tells you what the link is doing. Web companion over WebUSB.github.com/coroiu/pico-linkheat_exchanger_controllerRuns my house's district heating with model-predictive control instead of a fixed heat curve, by feeding the heat exchanger a fake outdoor temperature.github.com/coroiu/heat_exchanger_controller
## company
$ cat company.txt
- name
- Pear Programming AB
- org.nr
- 559380-6002
- vat
- SE559380600201
- f-skatt
- godkänd för F-skatt
- seat
- Malmö, Sweden
- invoicing
- billing@pearprogramming.se
## verify
How to check it is really me, and how to send me something privately.
ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGgHDhi5GohchooiVPbFB0NHrt4jqD5VBAocFhIjanF9 fingerprint SHA256:dfe5ZctvfsLTfbyQXz/mSezonfbVKby8PDL/lRpfGms openpgp4fpr 8D29 E6FD DE32 6B99 82E0 5361 E70B 5FFC 81DF EC1A
Commits are signed with the SSH key (ssh-keygen -Y verify checks any signature); the OpenPGP key is the one I sign with at work. To send me something privately, encrypt to either: curl -sO https://pearprogramming.se/signing-key.pub && age -R signing-key.pub -o secret.age file or the OpenPGP key at /key.asc.