Augustin Vignet

Recruited by the Global Head of Engineering to lead the development of two GenAI-powered document authoring platforms for Sanofi R&D: one for regulatory submissions, the other for clinical trial reporting. Managing a team of three engineers, owning the full-stack architecture, and working closely with data scientists on Python-based GenAI pipelines. Infrastructure is provisioned with Terraform and deployed on AWS (ECS, Lambda, API Gateway, S3, RDS, SSM), using GitHub Actions for CI/CD. Built ReactJS applications with React Query for fast, fluid UX and optimistic updates. Integrated collaborative, GenAI-enabled document editors using TipTap (with custom plugins), OnlyOffice (.docx editing), and a native Word Add-in. Designed a backend combining NestJS (Prisma ORM) for business logic APIs and real-time WebSocket communication, with Python services (FastAPI, Pydantic, Langchain, Boto3) powering OpenAI-based LLM structured outputs generation and a Retrieval-Augmented Generation (RAG) system. This includes a document parsing pipeline, vector indexing, and fine-grained access-controlled querying. Skills: ReactJS, React Query, NestJS, Prisma, Python, FastAPI, Pydantic, Langchain, OpenAI, AWS (ECS, Lambda, API Gateway, S3, RDS, SSM), Terraform, GitHub Actions, TipTap, OnlyOffice, RAG.

Created an internal NextJS app for efficient LLM queries using proprietary knowledge. Developed a ChatGPT-like interface linked to internal knowledge, capable of answering questions and providing citations extracted from various formats. Designed an automated Request for Proposal response interface, allowing users to upload documents and download comprehensive answers generated from internal knowledge and past RFPs. Implemented a user-friendly UI for document organization, ensuring personalized responses by incorporating both user and shared documents within the LLM system. Skills: Prisma ORM · Nextjs · GPT-4 · TypeScript · React.js

Implemented GPT-4 for menu parsing, developed a vector-based matching service. Introduced Cypress tests, shared type system, and migrated from Django to FastAPI. Optimized React app performance with caching and added MJML-based email module. Migrated 10+ repositories to a monorepo with unified CI. Refactored Python for code sharing in FastAPI. Skills: Apache Airflow · LLM · GPT-4 · Redux.js · FastAPI · TypeScript · Django · PostgreSQL · React.js · GCP · Python

Conducted in-depth analysis of e-commerce website functionality, specializing in reverse engineering to understand and evaluate API integrations and operational mechanisms. Developed an external application integrated with headquarters' APIs, enabling customers to place orders and process payments using credit cards, Apple Pay, and Google Pay. Skills: Next.js · TypeScript

Improved the ReactJS application's performance through strategic optimization of Redux stores and API requests. Redesigned the Python API to seamlessly integrate with the Gurobi computation engine. Skills: Redux.js · FastAPI · TypeScript · React.js · Python

Developed a software stacking platform for BabyGhost NFT, integrating Firebase authentication, ReactJS, blockchain APIs, and OpenSea data scraping for rewards. Created a Discord Bot for real-time alerts on Ethereum blockchain and Firebase data, focusing on OpenSea transaction activities. Skills: Hardhat · Discord API · Firebase · Serverless · MetaMask · Solidity · Smart Contracts · React.js · Node.js · GCP

Co-founded and led the technology development of Kairn App in partnership with eFounders.

Created an all-in-one task management software, leading a team of 3 to develop on Web, macOS, and iOS. Delivered a beta to 300 select users within 6 months, integrating with Slack, Notion, and Zapier. Continually optimized for product-market fit, culminating in Kairn winning 'Product of the Week' on Product Hunt in March 2022. Part of the eFounders 2020 batch, joining a lineage of innovative companies like Front, Spendesk, and Mailjet. Skills: TypeScript · NestJS · GraphQL · TypeORM · WebSocket · Apollo GraphQL · AppleScript · Swift (Programming Language) · Kubernetes · Terraform · Cypress.io · Jest · PostgreSQL · React.js · Node.js · GCP

Joined as the third employee shortly after launch, rising to CTO, Board Member, and Founding Partner. Transformed manual operations into an application ecosystem, driving 1.8x annual revenue growth. Led a tech team of 7, including 6 developers and 1 product manager. Influenced corporate culture during growth to over 50 employees. Skills: Django · Celery · Django REST Framework · PostgreSQL · Redis · AngularJS · React.js · Python