Tristan Celder
Product Engineer at ZOLMO LIMITED
Portugal
Summary
👤
SeniorTristan Celder is a product engineer and former startup founder with nine years of hands-on experience designing and building award-winning iOS apps, including work that earned an Apple Design Award and drove a mobile publishing business to seven-figure revenue and fifteen million downloads. He blends product instincts, UX design and Swift engineering to conceive and ship polished consumer apps, and has led teams from concept through scale. Based in Portugal, Tristan also contributes to open-source back-end work, notably adding a Swift API and robust type support for the widely used analytical database DuckDB, reflecting a knack for bridging mobile front ends with performant data layers. He’s as comfortable iterating on interface microcopy and visual detail as he is implementing database integrations and prepared statements, bringing a rare combination of design sensibility and systems-level pragmatism.
9 years of coding experience
Stackoverflow
7,095reputation
426kreached
16answers
36questions
Github Skills (21)
conversions10
data-conversion10
databases10
sql10
type-conversion10
swift10
convertion10
database10
apidoc9
api9
embedded-database8
analytics8
cocoa-touch6
macos6
swiftui6
Programming languages (9)
Github contributions (5)
duckdb/duckdb
Feb 2023 - Sep 2024
DuckDB is an analytical in-process SQL database management system
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 review, 14 PRs, 14 comments in 1 year 7 months
Contributions summary:Tristan primarily contributed to the development of a Swift API for the DuckDB database. Their commits involved adding the initial Swift API, including the `QueryResult` and `Column` classes. They added support for type conversions, including several data types such as `Date`, `Time`, `Timestamp`, `Interval`, and `Data`, demonstrating a focus on the database's integration with Swift's data types. The user also contributed to the `Appender` and `PreparedStatement` classes to improve the database usability.
duckdbsql-databasesqldatabaseolap
tcldr/EntwineRx
Jun 2019 - May 2020
Contributions:2 releases, 16 commits, 8 pushes in 11 months
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