Freelancer profile translated to English.
Back to original languageAbout Thomas-Killian
CentraleSupélec Engineer | Full Stack & Game Dev | Security Expert (ISO27001)
Graduated from CentraleSupélec and James Cook University (Singapore), I design complex digital architectures combining performance and robustness.
My expertise is focused on two main areas:
1. Advanced Development:Creation of scalable applications and tailor-made video game experiences (Mods, In-Game Events, Proprietary Engines).
2. Offensive & Defensive Security:My "Security by Design" approach, certified ISO27001, guarantees the integrity of your products from the very first line of code (Audit, Pentest, Secure Architecture).
I transform technical challenges into reliable, secure, and production-ready solutions.
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Technical Skills
Frontend
Frameworks: NextJS, React, TanStack Query
Styling: Tailwind CSS
Backend
Languages: Golang, NodeJS, Rust, Python, PHP, .NET, Java
Databases: MySQL, PostgresQL, Redis, MongoDB, ImmuDB
Cloud & Infra: AWS, OVH, Docker, Kubernetes
Communication: gRPC, GraphQL
Message Brokers: NATS, Kafka, RabbitMQ
Video Games & Creative Tech
Commercial Engines: Unity, Unreal Engine, Roblox Studio, UEFN (Fortnite)
Modding & Low-level: GTA 5 (FiveM/RageMP), Valve Source, Minecraft, Among Us (IL2CPP Injection)
Cybersecurity & Governance
Certification: Lead Implementer ISO 27001
Operational: Pentest, Code Audit (CSPN), Secure Architecture
Governance: Risk Analysis (EBIOS RM), Compliance Audit
Blockchain
Smart Contracts:
Solidity
Infrastructure:
Oracles (Pyth / Chainlink), Offchain (Ethers.js)
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 50km), Lyon (up to 100km), Rennes (up to 100km), Lille (up to 100km), Montpellier (up to 100km)
Experience
- BiovyseCTOOctober 2025 - Today (10 months)Identity & Standards Architecture: Native implementation of cutting-edge OID4VC (Issuance) and OID4VP (Verification) protocols for compatibility with digital wallets (Apple/Google Wallet, EUDI). Integration of the ISO 18013-7 standard for US mDL (Mobile Driver’s Licenses) verification.Zero-Trust Risk Engine (TrustSignal): Development of a real-time fraud analysis engine (Go/gRPC). Integration of bot detection (JA4), velocity via Redis, and cryptographic signature of each risk score via AWS KMS for full auditability.Governance & Security: Implementation of an asynchronous Multi-Sig approval system secured by FIDO2/WebAuthn and an authorization policy engine based on Cedar (Policy-as-Code) and the AuthZEN API.High-Performance Architecture: Design of a modular backend in Go (Standard Lib + SQLC). Use of NATS JetStream for event-driven architecture and ClickHouse for massive security log ingestion (OCSF).Infrastructure & DevOps: Cloud-Native deployment on AWS (EKS, RDS, ElastiCache) via Terraform. CI/CD pipeline including virtual wallet simulators.Technical Stack: Go, TypeScript (Next.js), NATS JetStream, PostgreSQL, Redis, ClickHouse, AWS (EKS, KMS), OID4VC, Docker, Terraform.
- WhizpayCTOJanuary 2025 - April 2025 (3 months)Development of a cross-border payment application.Infrastructure architecture on AWS, and development of APIs in Golang.
- -CTOPRIVATE EQUITYJanuary 2024 - December 2024 (11 months)Development of a derivatives trading platform (stocks, forex & crypto).- API Development (NodeJS)- Price certification system development
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Education
- Advanced Master of CybersecurityCentraleSupélec & IMT Atlantique2021
- Master of Information TechnologyJames Cook University Singapore2020
Certifications
- ISO 27001 LEAD AUDITORLSTI2021