Nicolas Lagier
Chief Technology Officer at Jihoun
Seoul, South Korea
Summary
👤
Senior🎓
Top SchoolNicolas Lagier is a seasoned CTO and engineering leader with a decade of experience solving hard data and systems problems across payments, loyalty, healthcare, and fintech. He has a strong track record modernizing legacy stacks into resilient, automated, microservice-oriented architectures (AWS autoscaling, Terraform, SQS/SNS) while keeping product velocity and security priorities aligned. As founder/CTO roles at Jihoun and Recovery Systems and prior senior leadership at Giift and Healint, he blends hands-on system design with operational discipline to deliver high-availability, asynchronous platforms and complex ordering/payment routing engines. Based in Seoul, he pairs European engineering education and early GPU/real-time graphics work with practical product instincts, often shipping major infra changes with no downtime. Notably, he has repeatedly migrated monoliths to API-driven, TypeScript frontends and modular backends, enabling smoother iteration and third-party integrations.
10 years of coding experience
14 years of employment as a software developer
MASTER bac +5, MASTER bac +5 at National School of Computer Science and Applied Mathematics of GrenobleHigh School - Exchange student, High School - Exchange student at Kohala High SchoolCPGE PSI, CPGE PSI at Lycée Victor HugoExchange student in masters degree Computer Science, Exchange student in masters degree Computer Science at Korea Advanced Institute of Science and Technology
Korean, French, English, Korean
Stackoverflow
11reputation
77reached
1answer
1question
Github Skills (30)
javascript10
cypress10
ai-agent10
storybook10
typescript10
build-system10
nextjs10
monorepo10
nodejs10
react10
angular10
cli10
aws9
terraform-provider8
terraform8
Programming languages (7)
Github contributions (5)
giift/giift.github.io
Apr 2016 - Apr 2021
Contributions:80 pushes, 1 branch in 5 years
jihoun/terraform
Sep 2022 - Apr 2026
Contributions:36 PRs, 143 pushes, 18 branches in 3 years 7 months
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