Thomas Didierjean
Engineering Lead at Personio
Bonn, North Rhine-Westphalia, Germany
Summary
👤
Senior🎓
Top SchoolThomas Didierjean is an engineering lead with 16 years of hands-on backend experience building scalable APIs, microservices, and high-traffic database systems across travel, payments, and consumer platforms. He has led teams at Personio and Impala, hiring and mentoring engineers while owning architecture, performance, and reliability for services using Node.js, Go, TypeScript, PostgreSQL, MongoDB, Kubernetes and AWS. Thomas combines product-facing integration work (hotel and payment provider APIs) with deep platform engineering—designing CI/CD, infrastructure as code, and migration paths for systems with tens of millions of users. A founder and early cloud technical lead, he brings entrepreneurial instincts and a pragmatic approach to trade-offs between velocity and long-term maintainability. Based in Bonn, Germany, he blends senior management experience with continued hands-on coding and system design.
16 years of coding experience
14 years of employment as a software developer
Master, Bioinformatics, Master, Bioinformatics at University of Paris-SudLicence, Bioinformatics, Licence, Bioinformatics at University of Paris 6
English, French, Spanish, German
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (13)
receipt-validation8
validation8
php7
kotlin6
ios6
language-learning5
datadog5
graphql3
grammar3
react3
parser-generator3
cli2
go1
Programming languages (4)
Github contributions (5)
Busuu/ios-receipts-api
Aug 2016 - May 2019
PHP IOS Receipt validation library
Contributions:6 releases, 23 commits, 10 PRs in 2 years 9 months
validationphpvalidation-libraryiosreceipt-validation
tdidierjean/german-grammar-trainer
Aug 2019 - Feb 2022
Generate random German grammar exercises, with a GraphQL and a CLI interfaces.
Contributions:1 PR, 17 pushes in 2 years 6 months
clilanguage-learninggrammarparser-generatorgraphql
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