Freelancer profile translated to English.
Back to original languageAbout Romain
Fullstack, APIs, Rust, Kubernetes, CI/CD, observability, distributed systems. I help teams build, stabilize, and industrialize complex technical products.
With 10 years of experience, I support companies in the design, development, and production deployment of web applications, backends, APIs, internal tools, and cloud infrastructures.
I am involved in the entire technical cycle: requirements scoping, architecture, fullstack/backend development, integration, CI/CD, deployment, observability, performance, and production release. I can take charge of a complete application, strengthen an existing team, stabilize a critical backend, or industrialize an infrastructure.
My approach is pragmatic: deliver quickly, cleanly, with a strong focus on maintainability, reliability, and real production constraints. I use technologies adapted to the context, particularly Rust when performance, safety, or low-level needs justify it.
I also integrate AI assistants into my development workflow in a controlled manner: code analysis, test generation, documentation, solution exploration, refactoring, and acceleration of repetitive tasks. The goal remains simple: produce more efficiently without delegating technical responsibility or final quality.
I also have experience with demanding distributed systems, notably through my contributions to the Kaspa Layer-1 ecosystem, focusing on robustness, performance, observability, SDK/RPC, and developer tooling.
I can act as an autonomous senior developer, a technical architect for a targeted scope, or experienced support to help a team scope, build, stabilize, or industrialize a product.
French
Native or bilingual
English
Native or bilingual
Can work on-site
Lyon (up to 20km)
Experience
- KaspaBlockchain Engineer PoW RustBANKING AND INSURANCEAugust 2024 - Today (1 year and 10 months)Lyon, FranceSoftware engineer and core contributor improving Kaspa Layer-1 robustness and developer usability—focused on resiliency, performance/observability, and practical Rusty-Kaspa tooling/SDK/RPC ergonomics. Contributes concrete engineering work that prepares the stack for upcoming protocol upgrades and future zk-oriented ecosystem capabilities.
- HarvestrLEAD FULLSTACK DEVELOPERSOFTWARE PUBLISHINGJuly 2022 - August 2024 (2 years and 1 month)Lyon, France• Developed AI features of Harvestr, including automatic categorization (RAG) and summary generation.• Designed a new modular infrastructure and proposed ground changes to reduce costs and vendor-locking.• Guided and mentored a talented team of full-stack developers.• Prioritized features based on customer feedback and business vision.• Participate in the effort to gain SOC-II certification (and others).• Rebuilt the entire auth system and implemented auth protocols such as SAML and OpenID Connect.
- PulseLife (ex 360 medics)LEAD FULLSTACK DEVELOPERMEDICALOctober 2021 - July 2022 (9 months)Lyon, France• Designed and developed full-stack web applications.• Participated in all phases of applications lifecycle from concept to end delivery.• Simplified the process of creating new applications by creating a CLI that initiate a boilerplate alongside with terraform files.• Team mentoring and rigorous peer-coding session.• Designed and developed an OpenID Connect server with CDK for different languages (Golang, Node.js, Js, Java)
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Education
- Professional Bachelor's Degree in IT Professions: Web ApplicationsIUT2 of Grenoble2020
- Bachelor's Degree in Mathematics and Computer ScienceUniversity Grenoble Alpes2019