Fari Software GmbH
I take on what's hard: debugging, performance, stabilization. And I stay on board when teams need lasting reinforcement. Focus: C++, Python, embedded and systems-level environments.
01Symptoms
Existing systems rarely fail spectacularly. It gets harder gradually: changes take longer, bugs resist isolation, and nobody can say for sure where the cause lies.
That's where I start: at the cause, not the symptom.
02Services
No off-the-shelf development. Targeted support where existing systems get difficult — and reliable development afterwards.
01
Crashes, race conditions, memory issues, sporadic misbehavior — including directly on embedded target hardware.
02
When systems slow down, tip over under load, or devour resources. Measure first, then optimize.
03
Making grown systems with legacy code and technical debt maintainable and changeable again — targeted, no big-bang rewrite.
04
Building features in existing systems, automating tests and deployments — so your team makes progress again.
I don't come for slide decks and moderation. I come when a technical problem needs solving — and stay when it becomes more.
03Case studies
Anonymized examples from real projects — industries and details deliberately generalized.
BioTech · Embedded Linux
Semiconductors · Test & measurement
Sensors · Industrial
04Engagements
Depending on the situation, I start differently — from a first assessment to long-term collaboration.
01 Entry
For concrete problems where clarity is needed first: what is likely the real problem? How to approach it sensibly? Is a deeper engagement worthwhile?
—Unclear technical problems
—A first read before committing to bigger work
—An experienced technical outside perspective
02 Diagnosis
I analyze a concrete problem in a structured way — and deliver a clear assessment, priorities, and next steps for your team.
—More complex technical situations
—Grown-over systems with several possible causes
—Orientation and a structured way in
03 Hands-on
Hands-on work inside the system: analyze, stabilize, optimize, develop — remote or on site, one-off or ongoing.
—Acute technical bottlenecks
—Concrete problems that need implementation
—Lasting reinforcement for the team
Many projects start with one concrete problem — and grow into long-term collaboration. We'll figure out the right format case by case. Tell me briefly what it is about →
05About me
Software engineering from Böblingen, near Stuttgart
Fari Software is the specialized GmbH of Matthias Spiller, based in Böblingen, Germany. I make existing technical systems manageable again — and keep developing them once the acute pressure is off.
I work hands-on: reading code, debugging, measuring, optimizing. Concept papers are not my business.
When a project needs more hands, I bring in experienced developers from my network.
Your main contact
Matthias Spiller
Managing director & software engineer
Over 20 years in complex technical systems — C++, Python, embedded, systems-level environments, including safety-critical contexts in automotive and biotech. "Fari" is Esperanto for: to do, to make.
What clients say
“Once a task is assigned, it simply gets done to a high standard, without the need for follow-ups. Matthias brings a rare mix of technical expertise, ownership, and clarity that I’d recommend to any team without hesitation.”
“His expertise in C++ and C#, particularly in embedded systems and CAN protocols, was instrumental in improving our microcontroller library and firmware. Beyond his technical skills, Matthias was a pleasure to work with.”
06Contact
A concrete problem — or the question whether I'm the right fit? Drop me a short note. I usually reply within 24 hours with a first assessment.
Available for new engagements
info@fari-software.de