About
Lukas Postulka previously worked as a quantitative trader and studied at Technical University of Munich (TUM). He was a fellow in the Z Fellowship program.
Co-Founder & CTO at WalterYC X26
Intro paths
YC
Lukas went through Y Combinator (Spring 2026) — any YC alum in your network can reach them through the YC community.
GP
Their group partner at YC was Harj Taggar, General Partner at Y Combinator — the partner who ran Walter's batch and knows the company first-hand. YC profile ↗
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In turn, Lukas can intro founders to Walter's investors below.
Walter's investors · 7
Co-founders at Walter
NK
Nikolas KellerCo-Founder & CEO
Experience
- Walter (YC X26)CTOcurrent2026 — presentVereinigte Staaten von Amerika
- Scalable CapitalQuantitative Trading | Market Making2025München, Bayern, Deutschland
- Scalable CapitalFull Stack Software Developer2024 — 2025München
- PwCSoftware Developer2023 — 2024München
- La FamigliaFrontend Software Developer2023Munich
- DenodoData Engineer2022 — 2023München
- Qudosoft GmbH & Co. KGIT2021 — 2022Berlin, Deutschland
Frequently asked questions
- Who is Lukas Postulka?
- Lukas Postulka previously worked as a quantitative trader and studied at Technical University of Munich (TUM). He was a fellow in the Z Fellowship program.
- Where does Lukas Postulka work?
- Lukas Postulka is Co-Founder & CTO of Walter.
- What companies did Lukas Postulka found?
- Lukas Postulka founded Walter.
- Where did Lukas Postulka go to school?
- Lukas Postulka studied at Y Combinator (P26); Technical University of Munich (B.Sc., CS); Z Fellows.
Founder mafias
Y Combinator mafia8,773
Also came through, then founded or led a company.
Sam AltmanPresidentFounded Tools for Humanity +3Jessica LivingstonCo-founderFounded Y CombinatorAlexis OhanianYC Summer 2005Founded RedditFred EhrsamYC Summer 2012Founded Nudge +1Matt HuangYC Winter 2011Founded HotspotsTrae StephensYC Winter 2022Founded Pursuit +1
+ 8,766 more
Y Combinator mafia4,716
Also came through, then founded or led a company.
Ryan SheaEntrepreneurshipFounded StacksTarek MansourFounded KalshiSuhail DoshiEating beans & riceFounded Playground +1Subomi OluwalanaW22Founded ConvoyDarius "Bubs" MonsefS19Founded Sightbox +3Matthew ScholzFounded Oisin Biotechnologies +3
+ 4,709 more
Z Fellows mafia37
Also came through, then founded or led a company.
Dante VaisbortFounded Haylon Technologies +1David LinFounderFounded DufflTeddy LiZF1Founded NophinColin SnyderTechnology Fellowship | Less than 1% acceptance rateFounded BanaboMikael NidaFounded LotusKatherine HeFounded Nectar
+ 30 more
La Famiglia 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 ConvoyMaroof AhmedFounder at Octopus VenturesJustin SwartPartner at Bitkraft Esports VenturesCollin WallaceGeneral Partner at Lobby Capital
+ 1,994 more
Also attended Technical University of Munich283
Daan BoekhoudtInvestment Analyst at Cottonwood Technology FundJulian von EckartsbergManaging Director Europe at Burda Principal InvestmentsHannes Voucko-GlocknerInvestment Analyst at Burda Principal InvestmentsThomas MeierPartner, Head of Resilience in Energy & Resources Investments at Verve VenturesNiklas Born de AndrésInvestment & Product Intern at Kibo VenturesItziar EstevezPartner - Growth at Iris Capital
+ 277 more
Shared employers
Also worked at Walter (YC X26)1
Also worked at Scalable Capital9
Rainer MärkleGeneral Partner at HV CapitalJannis FettInvestor at HV CapitalArtem ZhuravlevCommunications Manager at SpeedinvestChristian MieleInvestor at HeadlineChristian WinterGeneral Partner at TEV VenturesLuisa MüllerInvestment Analyst at Future Energy Ventures
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+ 3 more
Also worked at PwC1,102
David PhuController at Felicis VenturesTianen LiangTax Controller at Felicis VenturesJanet WolpertInvestor at Index VenturesAryo TehranianManaging Director at Mayfair Equity PartnersAne Tolnes HaugdalInvestor at InvestinorEgilInvestor at Investinor
+ 1,096 more
Also worked at La Famiglia11
Jeannette zu FürstenbergPresident & Managing Director at General CatalystChristian MieleInvestor at HeadlineRobert LacherFounding Partner at Visionaries ClubJudith DadaGeneral Partner at Visionaries ClubTimon SchneiderInvestment Team Fellow at Amino CollectiveCarlo P.Investor at Hiro Capital
+ 5 more