Find your path to Jonathan
762 people in our graph share verified history with Jonathan — schools, employers, funds. One of them is your warm intro.
Garry TanunlockedJonathan: together at Y Combinator (2025)
×8Jonathan: together at Y Combinator
×3Jonathan: together at University of Bath
About
Jonathan van Wersch worked as a software engineer at Meta on machine learning integration for mobile ads, and previously at UK-based Improbable where he led growth of the web platform team. He holds bachelor's and master's degrees in mechanical engineering from the University of Bath, where he served as project manager and engineering lead for the university's rocket team.
Co-founder & CTO at PhasesYC S25
Intro paths
YC
Jonathan went through Y Combinator (Summer 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 Phases's batch and knows the company first-hand. YC profile ↗
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In turn, Jonathan can intro founders to Phases's investors below.
Phases's investors · 3
Co-founders at Phases
JW
James WallCo-founder & CEO
AZ
Anton ZaliznyiCo-founder & Chief AI Officer
Experience
- PhasesCo-Founder & CTOcurrent2025 — presentSan Francisco Bay Area
- MetaSoftware Engineer2024 — 2025London Area, United Kingdom
- ImprobableSoftware Engineer2022 — 2024London, England, United Kingdom
- AcreSoftware Engineer2021 — 2022Greater London, England, United Kingdom
- UnileverMechanical Design Engineer2019Bedford, England, United Kingdom
- GKN AerospaceAdditive Manufacturing Engineer2017 — 2018Greater Bristol Area, United Kingdom
Skills & more
PostgreSQL1Leadership1Interviewing1Next.jsPython (Programming Language)Front-End DevelopmentAmazon Web Services (AWS)Terraform2Github Actions1Redux1FirebaseGoogle Cloud Platform (GCP)
+12 more
Express.jsGraphQlReact Testing LibraryCascading Style Sheets (CSS)React NativeReact.jsJavaScriptCSS3D PrintingProject ManagementExpressCypressFrom Jonathan's professional profile.
Frequently asked questions
- Who is Jonathan van Wersch?
- Jonathan van Wersch worked as a software engineer at Meta on machine learning integration for mobile ads, and previously at UK-based Improbable where he led growth of the web platform team. He holds bachelor's and master's degrees in mechanical engineering from the University of Bath, where he served as project manager and engineering lead for the university's rocket team.
- Where does Jonathan van Wersch work?
- Jonathan van Wersch is Co-founder & CTO of Phases.
- What companies did Jonathan van Wersch found?
- Jonathan van Wersch founded Phases.
- Where did Jonathan van Wersch go to school?
- Jonathan van Wersch studied at University of Bath (MEng (Hons), Mechanical Engineering with Industrial Placement); Y Combinator.
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
University of Bath mafia63
Also came through, then founded or led a company.
Iain DukesBScFounded Viriom +1Paul HetheringtonIntegrated Mechanical & Electrical Engineering (MEng)Founded Hlabs +1George Kalligeros(MEng) Masters in Mechanical EngineeringFounded Aseon +1Pedro GomesHigher National Certificate (HNC)Founded Reown +1Dominic LewisInternational Business Management + EconomicsFounded Tray +1Jack RogersBA Hons Modern Languages with European Studies (Russian and French)Founded Picknic Media +1
+ 56 more
Improbable mafia11
Also came through, then founded or led a company.
Chris BattarbeeSoftware Engineering InternFounded MetoroMichal PándySoftware Engineer InternFounded MediSearchDani PenevSoftware Engineering InternFounded SlickerIvan ValkovSoftware EngineerFounded SlickerCristian BodnarSoftware Engineer InternFounded SilurianMatej NovakSoftware EngineerFounded EigenPal
+ 4 more
Improbable mafia9
Also came through, then founded or led a company.
Chris DixonDirectorFounded Founder CollectiveChris BattarbeeSoftware Engineering InternFounded MetoroDani PenevSoftware Engineering InternFounded SlickerIvan ValkovSoftware Engineering InternFounded SlickerMatej NovakSoftware EngineerFounded EigenPalAnant KapoorSenior / Group Product ManagerFounded Guided Energy
+ 2 more
Same school
Also attended University of Bath223
Catherine BergersenSenior Executive Assistant at Mayfair Equity PartnersJohanInvestor at InvestinorMaddie CoughlinInvestor at DN CapitalBen PalmerInvestment Professional at OxxJuliette PetitChief of Staff at Keen Venture PartnersSarah HollyheadDirector at Marlin Equity Partners
+ 217 more
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
Shared employers
Also worked at Phases3
Also worked at Meta464
Nat FriedmanCo-lead of Meta Superintelligence Labs; co-founder of NFDGDaniel GrossMeta Superintelligence Labs; co-founder of NFDG and Safe SuperintelligenceDrew HoustonCo-founder & CEO of DropboxGabriel PereyraCo-founder & President of HarveyTinaInvestments & Portfolio Services Team Member at Clear VenturesMike ArpaiaComputer scientist working on machine learning and data infrastructure
+ 458 more
Also worked at Improbable25
Javier VillamizarAdvisor at AvilaRoger SunManaging Director at MPCi (formerly Matrix Partners China)Mark ShepherdChief Legal Officer at ImprobableAndreas Valentin PedersenAdvisor at Cointelligence FundLucas VeraartAnalyst at NPM Capital N.V.Ben NewsomeVP, Talent and People at Cherry Ventures
+ 19 more
