About
Sebastian Wallin is co-founder of Castle and an angel investor. His work focuses on using software and design to make complex technology more accessible.
Founder/CTO at CastleYC W16
Intro paths
YC
Sebastian went through Y Combinator (Winter 2016) — any YC alum in your network can reach them through the YC community.
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In turn, Sebastian can intro founders to Castle's investors below.
Castle's investors · 8
Boost VCSan Mateo · $500K checksF-Prime CapitalCambridge · $3M – $10M checksFirst Round CapitalSan Francisco · $1M – $7M checksIndex VenturesSan Francisco · $540K – $10.8M checksSparkLabs Global VenturesPalo AltoWalking VenturesLondon · $650K – $1.3M checksWinklevoss CapitalNew York · $100K – $5M checksY CombinatorSan Francisco · $500K checks · since 2016
Co-founders at Castle
JB
Johan BrissmyrFounder/CEO
Experience
- CastleCo-Foundercurrent2014 — presentMalmo, Skåne County, Sweden
- PopdevelopCo-founder2010 — 2016
- UserbinCo-founder2013 — 2014Malmö
- Neo TechnologyContractor2013
- ENEA Services ABEmbedded Software Contractor2007 — 2011
- SonyEricsson Mobile CommunicationsDevelopment Engineer2006 — 2007
- Axis CommunicationsMaster thesis worker2005
Skills & more
Embedded SystemsCCoffeeScriptGitRubyRuby on RailsJavaScriptCSS3HTML 5EmacsjQueryBackbone.js
+12 more
Embedded SoftwareEmbedded LinuxGCCGNU DebuggerSASSHAMLHerokuAngular.jsRTOSLinuxDevice DriversClearCaseFrom Sebastian's professional profile.
Frequently asked questions
- Who is Sebastian Wallin?
- Sebastian Wallin is co-founder of Castle and an angel investor. His work focuses on using software and design to make complex technology more accessible.
- Where does Sebastian Wallin work?
- Sebastian Wallin is Founder/CTO of Castle.
- What companies did Sebastian Wallin found?
- Sebastian Wallin founded Castle.
- Where did Sebastian Wallin go to school?
- Sebastian Wallin studied at Y Combinator (W16 batch); The Faculty of Engineering at Lund University (M.Sc., Electrical Engineering).
Founder mafias
Y Combinator mafia9,496
Also came through, then founded or led a company.
Sam AltmanPresidentFounded Tools for Humanity +3Garry TanPresident & CEOFounded Y Combinator +1Jessica LivingstonCo-founderFounded Y CombinatorAlexis OhanianYC Summer 2005Founded RedditFred EhrsamYC Summer 2012Founded Nudge +1Matt HuangYC Winter 2011Founded Hotspots
+ 9,489 more
Y Combinator mafia5,145
Also came through, then founded or led a company.
Ryan SheaEntrepreneurshipFounded StacksTarek MansourFounded KalshiSuhail DoshiEating beans & riceFounded Playground +1Subomi OluwalanaW22Founded ConvoyGleb ChuvpiloAlumFounded Pager +4IanFounded Apex Technology +3
+ 5,138 more
The Faculty of Engineering at Lund University mafia15
Also came through, then founded or led a company.
Rasmus AreskougMaster of Science (MSc)Founded ParaglideMagnus KennebyM.ScFounded BioLaminaTaylor FairbankStudy AbroadFounded ReSchedule MedMathias ThulinMaster of Science in EngineeringFounded GetAcceptLukas PeterssonMaster of Engineering - MEngFounded Andon LabsCaleb ChanFounded Lance
+ 8 more
Same school
Also attended Y Combinator2,000
Ryan SheaCo-founder of Blockstack (Stacks)Suhail DoshiFounder of Mixpanel; founder of ParticleArhaan A.Deeptech Fellow at Clear VenturesAkshat GoenkaInvestor at Moonfire VenturesJon XuGeneral Partner at Y CombinatorChris GoldaGeneral Partner at Y Combinator
+ 1,994 more
Also attended The Faculty of Engineering at Lund University46
Rasmus AreskougInvestor at DN CapitalAlexander Fred-OjalaInvestor at EQT VenturesMadelene LarssonPartner at Giant Ventures Global LlpAnna HauptInvestor at IndustrifondenPer AnellInvestor at IndustrifondenLeo AllgoewerImpact Investor at AENU
+ 40 more
Shared employers
Also worked at Castle3
Also worked at Popdevelop1
Also worked at ENEA Services AB1
Also worked at SonyEricsson Mobile Communications15
Takeshi ItoGeneral Partner at Quest Venture PartnersKajsa HammarInvestment Manager at ETF PartnersPatrik PerssonVenture Builder at LU InnovationLauri SutorAccounts Payable Manager at Avalon BioVenturesTyko CarlingSenior Controller at Norrsken VCFred LardiegAdvisor at Fabric Ventures
+ 9 more