Today, we introduce Sid Sijbrandij, the ultimate "information maximalist" (hereafter referred to as Sid).
On October 14, 2021, GitLab successfully went public. Born a decade ago in a residential building in the Netherlands, the company started as a simple open-source collaboration tool for developers. Under Sid's leadership, it grew step-by-step into a massive platform covering the entire software development lifecycle.
While GitLab's products are trusted by various enterprises, what truly made it famous in the business world is a fact that nearly defies common sense: it is one of the largest fully remote companies in the world. With over 2,500 employees and a market cap of $6.4 billion, it still does not have a single physical office.
Supporting all of this is the radical transparency culture that Sid insists upon. The GitLab handbook, spanning over 3,000 pages, is maintained and updated using their own system. It is not only open to all employees but also hosted on the public internet for anyone to查阅 (review).
Sid constructed a precise information system to support equally complex software development. It can be said that his obsession with information, documentation, and data is刻进了骨子里 (engrained in his bones).
But on November 18, 2022, he received news no one wants to face: he had cancer.
At the time, he was a self-made billionaire with a happy family built over 25 years with his partner; his life seemed nearly perfect. Yet, a 6-centimeter tumor on his spine instantly plunged everything into peril.
Throughout 2023, Sid underwent treatment that could only be described as "devastating": cancerous vertebrae were removed, titanium alloy supports were implanted in his spine, and he endured multiple rounds of high-intensity radiation and chemotherapy, requiring four blood transfusions just to barely stabilize his life.
An even greater blow followed: In 2024, the cancer recurred.
The doctors' conclusion was nearly a death sentence: conventional treatments had reached their limit; perhaps only a clinical trial offered a glimmer of luck.
But Sid did not choose to give up. He made a firm decision: to fight his cancer with the mindset of a founder.
Treating Life as a Project: Saving Himself the Way He Managed GitLab
Over the past two years, Sid did not passively accept arrangements. Instead, he assembled a professional medical team to proactively lead and even customize his own treatment plan. This system bears a striking resemblance to GitLab's operational logic.
He built a massive document called **"Sid's Health Notes"**, detailing every consultation, every test, and every conversation. In 2025 alone, this document exceeded 1,000 pages, acting as a personal version of the GitLab handbook.
He insisted on **"maximalist diagnostics"**: all raw data from tests, imaging, and genomic sequencing are completely preserved—high-frequency, comprehensive, and leaving no information blind spots.
After standard therapies were exhausted, he built his own **"treatment ladder"**: one part involved repurposing drugs from other cancer treatments based on his personal tumor characteristics; the other part involved collaborating with research institutions and biotech companies to create treatment plans completely customized for him alone.
Sid used a rigorous information management system to organize diagnostic data, which then guided drug usage and development. Cancer is essentially a disease of chaotic genetic information, and this time, it met an opponent best skilled at processing information.
The result was shocking: Sid's cancer went into remission.
Now full of energy, he has not only founded a new software company, Kilo Code, but also operates a venture capital fund and a charitable foundation, while traveling the world with his wife.
Many simply attribute all this to the power of wealth. But the true value of this story goes far beyond that.
It reveals a more important truth: The future model of healthcare has already arrived; it just isn't widespread yet. Just as Magic Johnson, after contracting HIV, controlled his condition for a long time through early intervention and cutting-edge therapies, what were once "miracle solutions" now benefit countless people.
Chapter 1: "Staying Alive Became My Own Responsibility"
Sid has always loved creating and building products. After studying engineering physics and management science at the University of Twente, he worked for a private submarine company in the Netherlands. However, he quickly realized the industry's limitations, so he taught himself Ruby programming, immersed himself in Hacker News, and got up close with the early startup wave in Silicon Valley.
After experiencing a career as a programmer and his first startup, he stumbled upon a project: GitLab.
Created by Ukrainian programmer Dmitriy Zaporozhets, it was an open-source collaboration tool for Git users. At a time when GitHub was operating as a closed-source proprietary service, GitLab's open philosophy caught Sid's eye.
However, early GitLab only provided source code, requiring users to deploy it themselves. Sid seized on this pain point and launched a hosted version, Gitlab.io.
One evening, while making dinner with his girlfriend, he posted a test link to Hacker News. In just three hours, over 150 people registered to try it. He clearly realized he had found a product that truly fit the market.
Subsequently, he proactively contacted Dmitriy, providing funding to support him working on the project full-time. Eventually, Dmitriy became a co-founder and CTO.
In 2015, GitLab was selected for the YC incubator; by 2016, its user base broke through the millions, completing a $20 million Series B funding round. Prestigious institutions like IBM, NASA, and VMware successively became enterprise clients.
Particularly unique was that, well before the pandemic, Sid firmly implemented a fully remote model. While Silicon Valley generally believed startups must work offline, Sid only believed in facts: the best talent is spread across the globe, and their product itself was born for remote collaboration.
GitLab deeply reflects the founder's style: extreme transparency, documentation-driven, and open information. Over 13,000 internal meeting videos were uploaded to YouTube, the handbook grew to over 3,000 pages, and everything was traceable, reviewable, and open for joint improvement.
When the pandemic swept the globe and remote work was forced to become the norm, GitLab's system, once seen as a geeky style, instantly became the benchmark for organizational management. Harvard has published multiple case studies on it, and Sid has become an authority in the field of distributed team management.
By 2022, as the CEO of a public company with a net worth exceeding $1 billion and a happy family, his life seemed to be smooth sailing.
Until a sudden chest pain during exercise broke the calm. Two weeks later, suffering unbearable agony, he went to the emergency room. The examination results were suffocating: a 6-centimeter tumor appeared on the 5th thoracic vertebra, diagnosed as rare osteosarcoma.
Surgery, radiation, and chemotherapy followed one after another, taking a heavy toll on Sid's body: hair loss, extreme weakness, cognitive impairment, and damage to heart and blood-forming functions. The only time he broke from conventional treatment was when he leveraged Shasqi, a tumor company he had invested in early on, to successfully apply for and conduct a clinical trial designed solely for him.
After a brief remission, the cancer recurred in 2024. Standard protocols all failed, no suitable clinical trials were available, and the medical system had no more cards to play.
Sid realized calmly and firmly: "Staying alive became my own responsibility. At this point, no one else will bear it for me."
He resigned as GitLab's CEO, transitioning to Executive Chairman, and devoted his entire body and mind to fighting cancer.
Chapter 2: "I Am Willing to Talk to Anyone, Go Anywhere, and Be There Anytime"
Programmers and oncologists actually share the same underlying logic: a treatment decision tree based on biomarkers is essentially an algorithm.
When conventional algorithms reached their limit, Sid chose to refactor from scratch. He understood that he must rely on deeper diagnostic information to find or even create new therapeutic possibilities.
He established three core principles for himself:
- Maximalist Diagnostics: Do everything possible to complete all available tests at the highest frequency, preserving all information completely.
- Customize Personalized Treatment Combinations: Collaborate with global academia and industry to develop exclusive therapies for himself.
- Parallel Treatment, Not Serial: Do not wait for the disease to progress; advance multiple plans simultaneously, using data to empirically verify efficacy.
To this end, he built a top-tier diagnostic system covering five dimensions: single-cell sequencing, bulk genomic sequencing, Minimal Residual Disease (MRD) monitoring, organoid drug screening, and pathological staining verification.
Every piece of data could become the key to survival.
Afterward, he invited Jacob Stern, formerly of 10x Genomics and Palantir, to join full-time as the head of the medical team, coordinating top-tier global medical resources.
In the single-cell data analysis, the team discovered a decisive clue: Sid's tumor highly expressed fibroblast-related markers, especially the FAP gene. Coincidentally and fortunately, Germany was conducting an experimental radio-ligand therapy targeting FAP.
Sid did not hesitate; he immediately set off for Germany. As he said: "I am willing to talk to anyone, I am willing to go anywhere, and I can be there anytime."
This therapy is like a precision-guided miniature nuclear bomb: target molecules locate the tumor, carrying the radioactive isotope Lutetium-177 to achieve pinpoint killing.
The treatment effect far exceeded expectations: the tumor shrank significantly, becoming surgically viable again; immune data showed a qualitative change—T-cell infiltration in the tumor jumped from just 19% at recurrence to 89% after treatment.
Immune checkpoint inhibitors, neoantigen vaccines, oncolytic viruses, and radiation worked synergistically, ultimately controlling the cancer to undetectable levels.
Today, Sid continues to use mRNA personalized neoantigen vaccines to consolidate results and reserves more cutting-edge gene-engineered cell therapies as an ultimate safeguard.
His case is extreme, expensive, and difficult to replicate, yet it clearly predicts the future direction of cancer treatment.
Chapter 3: "I Am the One Who Breaks Through Walls"
Both Sid and Jacob come from technical backgrounds. After succeeding in saving himself, they naturally began to think: How can this model benefit more people?
They drew inspiration from Palantir's frontier deployment model: first solve specific problems, then solidify the methodology, and finally achieve automation and scaling.
The numerous obstacles they encountered in practice are precisely the real dilemmas of the current medical system:
- Hospitals are accustomed to patients obeying doctors' orders and find it difficult to accept treatment plans led by patients;
- Conventional sample processing methods destroy genetic information, making it extremely difficult for patients to obtain their own tissue and raw sequencing data;
- New drug development has fallen into "Eroom's Law": inputs rise exponentially while outputs decline exponentially. Pharmaceutical companies only chase blockbuster drugs, often abandoning niche potential therapies;
But Sid opened up a feasible path: obtaining experimental drugs quickly through the FDA's Single Patient Expanded Access pathway;
- Conducting drug repurposing based on molecular information;
- Collaborating with academic institutions to develop personalized therapies, such as personalized vaccines, radio-ligand therapy, and cell therapy.
He firmly believes that future healthcare will inevitably move towards personalization, data-driven approaches, and platformization: AI integrates diagnostic information, biological information systems analyze rapidly, modular treatments are generated on demand, costs gradually decrease, and ultimately, universal benefit is achieved.
He self-deprecatingly calls himself a wall-breaker, living ahead of time in a future that is not yet widespread. Standing between reality and the future are rigid processes, fragmented data, lagging regulations, and distorted incentives for new drug development.
Conclusion
Sid's story is not a legend of a rich man relying on money to extend his life. It is a real and extreme rehearsal of future medicine.
Doctors desire to cure patients, researchers continuously break through technical barriers, and regulatory bodies strive to adapt to innovation; it is just that the entire system has not yet achieved efficient coordination.
As William Gibson's famous quote goes: "The future is already here – it's just not evenly distributed."
Sid fought cancer with the mindset used to create GitLab: information transparency, data-driven decisions, rapid iteration, and proactive control. He not only won back his life but also walked out a new referenceable path for future medicine.
And all of this proves: some hopes are not waited for; they are created by human hands.
Editor: Shoufu Tolasji
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