Find your path to Daniel
253 people in our graph share verified history with Daniel — schools, employers, funds. One of them is your warm intro.
HemamunlockedDaniel: together at Stealth Startup (2024)
×8Daniel: together at Stealth Startup
×3Daniel: together at Celonis
About
Daniel Grittner is co-founder and CTO at Hey Telo. He previously worked as a software engineer at Amazon and Celonis, where he focused on database infrastructure, and has published computer vision research. He holds a BS in Computer Science from Technical University of Munich and completed bioinformatics coursework at ETH Zurich.
Founder at Hey TeloYC W25
Intro paths
YC
Daniel went through Y Combinator (Winter 2025) — any YC alum in your network can reach them through the YC community.
GP
Their group partner at YC was Gustaf Alstromer — the partner who ran Hey Telo's batch and knows the company first-hand. YC profile ↗
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In turn, Daniel can intro founders to Hey Telo's investors below.
Hey Telo's investors · 1
Co-founders at Hey Telo
CG
Christopher GrittnerFounder
Experience
- Hey Telo (YC W25)Co-Foundercurrent2025 — presentMunich, Bavaria, Germany
- Stealth StartupCo-Founder2024San Francisco Bay Area
- AmazonSoftware Development Engineer2022Luxembourg
- TUMResearch Assistant - Computer Vision Group2021 — 2022Munich, Bavaria, Germany
- CelonisSoftware Engineer (Database Development)2020 — 2022Munich, Bavaria, Germany
- ORDASoftware Engineer2019Munich, Bavaria, Germany
- Rödl & Partner (Geschäftsfeld Unternehmens- und IT-Beratung)IT-Consultant2017Nürnberg
Skills & more
Rust (Programming Language)1C++3Java5Python5JavaScript3HTML4CSS2Mac OSX2Git2React.jsNode.jsC
+12 more
SQLReact NativeCircleCIPyTorchCreativityStart-upsSoftware EngineeringWeb DevelopmentInvestitionenEntrepreneurshipSoftware DevelopmentManagementLanguages Deutsch · Englisch · Französisch · Spanisch
From Daniel's professional profile.
Frequently asked questions
- Who is Daniel Grittner?
- Daniel Grittner is co-founder and CTO at Hey Telo. He previously worked as a software engineer at Amazon and Celonis, where he focused on database infrastructure, and has published computer vision research. He holds a BS in Computer Science from Technical University of Munich and completed bioinformatics coursework at ETH Zurich.
- Where does Daniel Grittner work?
- Daniel Grittner is Founder of Hey Telo.
- What companies did Daniel Grittner found?
- Daniel Grittner founded Hey Telo.
- Where did Daniel Grittner go to school?
- Daniel Grittner studied at Y Combinator (W25); Technical University of Munich (Master of Science - MS, Computer Science); ETH Zürich.
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
ETH Zürich mafia196
Also came through, then founded or led a company.
Thomas DübendorferPhDFounded Spontacts +2Veronica Gambillara FonckEngineerFounded LimmaTech Biologics +1Dr. Hanspeter FässlerHonorary Councillor Award (Ehrenrat)Founded Gravis Robotics +1Stephen LakeVisiting ScholarFounded Jetson Home +1Maximilian MarquartDoktor (Ph.D.)Founded CHOVIVA +1Nikolay KobyshevDoctor of Science (Dr. sc.)Founded Assaia +1
+ 189 more
Celonis mafia12
Also came through, then founded or led a company.
Julian BorgProduct & DataFounded Remberg +1Antonios ChalkiopoulosVice President of Engineer, Orchestration and AutomationFounded NOFire AI +1Ron HirsonAdvisorFounded BokuBastian NominacherCo-CEO / Co-FounderFounded CelonisAlexander RinkeCo-CEOFounded CelonisPhilipp RollwageExternal Consultant @WashTec AGFounded CoCrafter
+ 5 more
Celonis mafia9
Also came through, then founded or led a company.
Julian BorgProduct & DataFounded Remberg +1Antonios ChalkiopoulosVice President of Engineer, Orchestration and AutomationFounded NOFire AI +1Ron HirsonAdvisorFounded BokuChristopher GrittnerProduct ManagerFounded Hey TeloMarvin Abdel-MassihProduct ManagementFounded UplaneTobias DreesEnterprise Account ExecutiveFounded Linexa
+ 2 more
Tum mafia2
Also came through, then founded or led a company.
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 Technical University of Munich468
Daan BoekhoudtInvestment Analyst at Cottonwood Technology FundJulian von EckartsbergManaging Director Europe at Burda Principal InvestmentsLuisa DüsbergPrincipal at Burda Principal InvestmentsHannes Voucko-GlocknerInvestment Analyst at Burda Principal InvestmentsPaula SchultheissSenior Associate at AN Venture PartnersThomas MeierPartner, Head of Resilience in Energy & Resources Investments at Verve Ventures
+ 462 more
Also attended ETH Zürich376
Bastian HasslingerInvestor at Index VenturesSteve VassalloInvestor at Foundation CapitalHelge DaebelPartner, Head of Water at Emerald Technology Ventures AgMaurin DaiInvestment Manager, Physical AI & Robotics at Emerald Technology Ventures AgChristoph FreiPartner, Head of Energy at Emerald Technology Ventures AgMax HeftiInvestment Director - Energy at Emerald Technology Ventures Ag
+ 370 more
Also attended EF Language Abroad14
Yagiz KARADENIZManaging Partner at DOMiNO VenturesAndrés EsquivesIntern at Salkantay VenturesMario PadillaInvestor at ActyusLaura CasasFinance Manager at Polymath VenturesLarissa SequeiraInvestor at Spring ActivatorYannick SchelbertHead Risk, Legal & Compliance at GWM AG
+ 8 more
Shared employers
Also worked at Hey Telo (YC W25)1
Also worked at Stealth Startup483
Andrew ChenGeneral Partner at Andreessen HorowitzGabriel PereyraCo-founder & President of HarveyErica VanInvestment Director at Intel CapitalHemamAdvisor at Clear VenturesArhaan A.Deeptech Fellow at Clear VenturesHamish GarnettAssociate at Manta Ray Ventures
+ 477 more
Also worked at Amazon1,091
Apoorva MehtaFounder of Instacart; founder of Cloud Health SystemsBinny BansalCo-founder of Flipkart; co-founder of PhonePe and OppDoorBrad PorterFounder & CEO of Collaborative RoboticsJane MooneyCo-founder & VP, Strategy and Finance at Collaborative RoboticsNick FrosstCo-founder of CohereViswa SankaranarayananVenture Partner at Monta Vista Capital
+ 1,085 more
Also worked at TUM103
Paula SchultheissSenior Associate at AN Venture PartnersAriel GolanInvestment Director at Bayern KapitalEduardo PalmaAssociate at 415 CapitalBen ScheidtPartner at RedstoneSebastian SchuonCo-Founder at Alasco at PICUS CAPITALJoanna SorokaInvestment Partner at Hitachi Ventures
+ 97 more