Bjarne Christiansen

Founder

Founder at Realm

San Francisco, California

Writes $5K – $25K checks · typically $15K

About

Bjarne Christiansen is an engineering leader with over 25 years of experience across AI/ML, IoT, and real-time data processing, currently working as a fractional CTO and product owner. He co-founded Realm, where he helped build the realm-core C++ storage engine, which was later acquired by MongoDB, and has since built industrial AI condition-monitoring at Cohera and led agentic AI architecture at Float. Based in Copenhagen, he has scaled engineering organizations across 13 countries and worked in regulated environments including pharma (GMP/21 CFR Part 11) and energy grid systems.

LinkedIn ↗X / Twitter ↗

Latest on 𝕏

Bjarne Christiansen @bjarnec

Super-proud to be launching Realm today! http://t.co/i7M8GdRbsS We are on the frontpage of hacker news http://t.co/HQaBaAD1mn

Jul 15, 2014 · ♥ 21 · ⇄ 18

Founder at Realm YC S11

Intro paths

Bjarne went through Y Combinator (Summer 2011) — any YC alum in your network can reach them through the YC community.

→

In turn, Bjarne can intro founders to Realm's investors below.

Realm's investors · 3

Frontline Ventures HubSpot Ventures Y Combinator

Co-founders at Realm

Alexander StigsenFounder/CEO

Experience

Fractional CTO / Product OwnerFractional CTO / Product Owner | Various Companiescurrent2023 — presentSan Francisco Bay Area
Various StartupsFounder, Board Member, and Strategic Advisorcurrent2016 — presentSan Francisco Bay Area
FloatChief Technology Officer2025 — 2026Copenhagen
Stealth ModeCo-founder & CTO2025Copenhagen, Capital Region of Denmark, Denmark
GoodwingsInterim Chief Technology & Experience Officer (CTO/CXO)2025Copenhagen, Capital Region of Denmark, Denmark
Cohera IncFounder & CEO2019 — 2025San Francisco Bay Area
RealmCo-founder2011 — 2018San Francisco Bay Area
NokiaSCM Product Owner1999 — 2012Copenhagen, Capital Region, Denmark
Freelance (Self employed)Web Designer & Consultant Software Developer1994 — 2011Copenhagen, Capital Region, Denmark

Education

Y CombinatorEntrepreneurship, business
Hillerød Business SchoolBachelor's degree, International Business1997 — 1999
HTXHigher Technical Examination Programme, Mathematics and Computer Science1994 — 1997
Engholm1983 — 1993

Skills & more

Engineering Leadership1AI/ML1Edge Computing / IoT1Startup Scaling1Software Project Management20Leadership19Management15Executive Management2Strategy1Strategic Planning1Business Strategy1Engineering Management

+12 more

Sales OperationsSystem ArchitectureStart-upsBusiness DevelopmentGlobal Cross-Functional Team LeadershipProject ManagementVenture CapitalDistributed SystemsSoftware EngineeringAgile MethodologiesSoftware DesignSoftware Development

Languages Danish · English

From Bjarne's professional profile.