Find your path to Sirian
544 people in our graph share verified history with Sirian — schools, employers, funds. One of them is your warm intro.
Garry TanunlockedSirian: together at Y Combinator (2025)
×11Sirian: together at Y Combinator
About
Sirian Maathuis is a designer and builder who now works on Bloom.
Founder at BloomYC X25
Intro paths
YC
Sirian went through Y Combinator (Spring 2025) — any YC alum in your network can reach them through the YC community.
GP
Their group partner at YC was David Lieb, General Partner at Y Combinator — the partner who ran Bloom's batch and knows the company first-hand. YC profile ↗
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In turn, Sirian can intro founders to Bloom's investors below.
Bloom's investors · 2
Co-founders at Bloom
DO
David Oort AlonsoFounder
Experience
- Bloom (YC X25)Co-founder Bloom (YC X25)current2025 — present
- Bloom (YC X25)Co-founder Fireviewcurrent2024 — presentAmsterdam - Zürich
- Bloom (YC X25)Co-Founder Giftitcurrent2023 — presentNederland
- SirianOwnercurrent2020 — present
- Kaleo Design LLCFlutterFlow Developer2022 — 2023
- PoingCo-founder2022 — 2023Amsterdam
- AEGIR-Marine BVAssistant Academy2020Wijk bij Duurstede, Utrecht, Nederland
- AEGIR-Marine BVAdministratief medewerker2020Wijk bij Duurstede, Utrecht, Nederland
- AEGIR-Marine BVMagazijn medewerker2019 — 2020Wijk bij Duurstede, Utrecht, Nederland
- NIC-OWebdesigner2019 — 2020Buren
- Levende Verhalen CulemborgGrafisch ontwerper2019Culemborg
- BloedbessenPlukker2016Asch
Skills & more
NederlandsEngelsUser Experience Design (UED)BlenderKeyShotGrafisch ontwerp3D-renderingDesignFlutterFlowCreatieve vaardighedenOplossen van problemenFlutter (software)
+4 more
PowerPointPhotoshopMicrosoft ExcelWebflow- Gravity Sketch Certified Designer — Gravity Sketch
- Gravity Sketch Certified — Gravity Sketch
- Gravity Sketch Student Ambassador — Gravity Sketch
From Sirian's professional profile.
Frequently asked questions
- Who is Sirian Maathuis?
- Sirian Maathuis is a designer and builder who now works on Bloom.
- Where does Sirian Maathuis work?
- Sirian Maathuis is Founder of Bloom.
- What companies did Sirian Maathuis found?
- Sirian Maathuis founded Bloom.
- Where did Sirian Maathuis go to school?
- Sirian Maathuis studied at Y Combinator (X25); Delft University of Technology (Bachelor of Science - BSc, Industrieel ontwerpen (Industrial design) / Industrieel product ontwerpen); University of Amsterdam (Minor, Entrepreneurship).
Founder mafias
Y Combinator mafia10,230
Also came through, then founded or led a company.
Sam AltmanPresidentFounded Tools for Humanity +3Garry TanPresident & CEOFounded Y Combinator +1Jessica LivingstonCo-founderFounded Y CombinatorAlexis OhanianPartnerFounded RedditFred EhrsamYC Summer 2012Founded Nudge +1Matt HuangYC Winter 2011Founded Paradigm +1
+ 10,223 more
Delft University of Technology mafia95
Also came through, then founded or led a company.
Eric MigicovskyIndustrial Design EngineeringFounded Beeper +1Menno GravemakerElectrical EngineeringFounded Momo Medical Group +1Kayra BahadirBachelor of Science - BScFounded Prestige +1Louis MonsignyBachelor of ScienceFounded Syntetica +1Sebastian ThrunHonorary DoctorateFounded Cresta +1Tom HubregtsenMaster’s DegreeFounded Voltrac +1
+ 88 more
University of Amsterdam mafia74
Also came through, then founded or led a company.
Job van der VoortBScFounded Remote Technology +1Helmuth van EsDoctor of Philosophy (PhD)Founded Antabio +2Sebastian BrunemeierMScFounded Cyclone Therapeutics +1Ingrid van WelieBachelor's degreeFounded Neural Dynamics Technologies +1Daniel HavenFounded Slauth.io +1David WylerBachelor's degreeFounded Kairos +1
+ 67 more
Same school
Also attended Y Combinator2,000
Tarek MansourCo-founder & CEO of KalshiSuhail DoshiFounder of Mixpanel; founder of ParticleSubomi OluwalanaCo-founder & CEO of ConvoyArhaan A.Deeptech Fellow at Clear VenturesCollin WallaceGeneral Partner at Lobby CapitalVictor SantosVictor Scout at One Way Ventures
+ 1,994 more
Also attended Delft University of Technology286
Michiel KottingPartner at NorthzoneGiuseppe LacerenzaPartner at Keen Venture PartnersAlexander WortmannPartner at TCVThijs SchaapInvestment manager at NoaberHugo SilvaPartner at Pi LabsRobInvestor at henQ vc
+ 280 more
Also attended University of Amsterdam319
Job van der VoortCo-founder & CEO of RemoteMartijn KleijwegtInvestor at LSP (Life Sciences Partners)René KuijtenInvestor at LSP (Life Sciences Partners)TorjusInvestor at InvestinorDamien van der BijlInvestment Director at Capricorn Venture PartnersAndrea van ElsasInvestor at Third Rock Ventures
+ 313 more