João Cristóvão
CTO & Founder at LovelyStay
Lisbon, Lisbon, Portugal
Summary
👤
Senior🎓
Top SchoolJoão Cristóvão is a seasoned CTO and founder with 12+ years of experience building product-led technology for short- and mid-term rentals from Lisbon. As co-founder and technical lead of LovelyStay/Optylon Group he combines real-time pricing algorithms, a transparent owner dashboard and a lean business model to drive profitability and scale. He is a hands-on engineer fluent in TypeScript, React, PostgreSQL and functional programming, with earlier systems and avionics experience in C, Python and embedded platforms for ESA projects. João also contributes to notable open-source work on PostgREST, improving SQL ordering and null-handling semantics—demonstrating attention to correctness in database-backed APIs. Comfortable moving between low-level systems and full-stack product work, he blends rigorous engineering practices with entrepreneurial focus.
13 years of coding experience
14 years of employment as a software developer
Electrical and Computer Engineering, Electrical and Computer Engineering at Instituto Superior Técnico
Portuguese, English
Github Skills (9)
api10
postgresql10
sql10
haskell10
api-design10
database9
testing9
databases9
rest8
Programming languages (13)
Github contributions (5)
PostgREST/postgrest
Feb 2015 - Apr 2015
REST API for any Postgres database
Role in this project:
Backend Developer
Backend DeveloperContributions:6 commits, 4 PRs, 6 comments in 2 months
Contributions summary:João contributed to the backend logic of the PostgREST API, focusing on query parsing and handling. They implemented features like support for `nulls first/last` in ordering and added related tests. Furthermore, the user addressed a bug in the ordering functionality and updated test cases to match documentation, demonstrating a focus on accuracy and functionality of the API. Finally, they added support for `IS/IS NOT null, true, false` and included GHC 7.10.1 support.
databasepostgresqlrestrest-apihaskell
jcristovao/pg-promise
Mar 2015 - Oct 2020
Contributions:1 PR, 15 pushes, 10 branches in 5 years 7 months
promisestransactions
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