Antoniu
From Romania (UTC+3)
Antoniu – Typescript, React, Node.js
Antoniu is a strong senior full-stack engineer with 6 years of experience in TypeScript, Node.js, and React, and practical knowledge of AWS and GCP. During the pre-vetting, he demonstrated solid backend and frontend skills, including Express.js, Fastify, PostgreSQL, MongoDB, and micro-frontend integration. Screening results suggest clear communication, a customer-oriented mindset, and strong problem-solving abilities!
6 years of commercial experience in
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Let’s get started today!Experience Highlights
Senior Full-stack Engineer
A platform where marketers can create ad-ready content following strict brand guidelines and publish it on multiple advertising platforms (Meta, TikTok, Google Ads, LinkedIn, etc)
- Designed and shipped an AI agentic system using Mastra (LLM orchestration) that analyzes user data and competitor PPC campaigns to recommend custom ad creatives for paid platforms.
- Developed publishing pipelines integrating with Meta, Google, LinkedIn, TikTok, and Amazon ad platforms, including platform-specific creative validation and pre-submission rule enforcement.
Solo Developer
An AI-powered platform for recommending gifts.
- olo developed an AI-enhanced recommendation platform that was giving gift suggestions based on a set of details about the giftee
- Hosted the app on a VPS and managed it through Plesk (which also provided continuous deployment)
- Used ChromaDB for vector storing of the gifts, NextJS v15 for Frontend, Flask for Backend, Grafana for Observability
- Used Claude agents + playwright for automated scraping of websites
Senior Frontend Developer
In the early era of AI, the Create module was designed to provide an AI-first interface that would let the platform's users generate images from text, similar images, and strict brand guidelines.
- Created a new and totally untested feature and a testing plan for the existing create module feature, both unit testing (Jest) and e2e testing (Playwright)
- Provided the initial set-up for the testing environments and settled on the patterns of testing and code standards, and led the initiatives until a high coverage/confidence number was reached
- Developed draft functionality using Jotai for state management
- Delivered under critical time, the ability to create images based on a given set of reference images
- Put the foundations of the first MVP with a first version of 4 generated images based on text and guidelines
- Built a predictive prompt-recommendation feature on top of the agentic pipeline, reducing user abandonment in the creative-creation flow by ~30%. Used Mastra AI, Vector Databases, and RAG
Front-end developer
An enterprise platform used to create, manage, and deliver digital content, websites, mobile apps, and user experiences across multiple channels. It is acting as both a DAM and a CMS.
- Led a major frontend refactor that made the codebase reusable across resource types, cutting new micro-frontend (MFE) delivery from months to ~3 sprints. Worked with React, TypeScript, Adobe Spectrum, Redux, Redux-Saga, Monorepo environment, Lerna
- Developed features such as async polling of tasks, unified error handling, retry logic mechanisms, content editing, displaying paginated content in an infinite scroll view, filtering
- Developed the contextual search through content resources capability using RAG [Hackathon]
- Integrated other internal frontend applications and managed communication between micro-frontends through custom events.