Helios
Pregioni Bayma
Staff Product Engineer
Agentic engineering
Freelance or full-time, remote or hybrid, Paris
Twenty-three years across France, Québec and Brazil
I build web products in TypeScript, React, Next.js and Node.js. I've been a tech lead, a product lead and a UX/UI designer
Event Setup
Client intake wizard with a live product preview for an event photography SaaS
The brief came from the CEO of a Paris event photography SaaS, and we worked out the business rules together. I started by interviewing the lead photographer and the sales and customer success teams. Then I designed and built the frontend over several rounds, until it was ready to hand over to the backend team.
The client opens a public link, no account needed, and builds their own branded gallery, seeing each choice on their own photos right away. The demo is a rebranded copy.
Linc payroll studio
The main app of a French payroll platform for accounting firms
From 2025 to 2026 I was the staff frontend engineer at Linc.
I refactored the payslip screen, where payroll managers spend most of their day, into UI components, logic and hooks, as my part of an urgent team effort to make it faster. I started the move to a feature-based architecture with TanStack Query, and added Playwright end-to-end tests and Storybook docs. Some backend developers spent up to 70% of their time on the frontend, so I started setting them up with coding agents: training sessions, a rewritten AGENTS.md and CLAUDE.md, per-feature docs, guardrail hooks and the Figma MCP.
Planned events calendar
The events calendar of a corporate event-planning platform serving PwC, Block and AWS
From 2023 to 2024 I built the calendar at Planned, in Montréal, as the only developer on it, and took over as its PM when ours left mid-project.
Week view, event cards, the details popover and date range navigation. I also made the case for a design system in 1:1s with engineers, PMs and the CEO, before the company hired a Head of Design to run it.
Wahi home estimation
The home-valuation flow of a Canadian real-estate platform
Senior frontend engineer in a squad of six at Wahi, a Canadian real-estate platform, from 2022 to 2023.
I built the valuation flow. Address lookup, guided editing of the home details, a live estimate. Then I led the performance work on it. Most of the gain came from code splitting, lazy loading, static generation (SSG/ISR) in Next.js and smaller GraphQL queries. The link opens the flow on a sample Toronto address.
Star Citizen ship pages
Three ship-reveal pages for Roberts Space Industries
I built these pages at Turbulent in Montréal, for Star Citizen, the most crowdfunded game ever.
I joined as a senior frontend engineer. I added design, PM and QA sign-off to our Definition of Done, which cut late rework on these animation-heavy pages.
Ort
A point-and-click environmental game for the first international portal of Petrobras. Visitors spent 54% of their portal time in it. The portal made the FT Top 75 corporate sites in 2008. Estudio Consequencia and I shared the concept, and I wrote all the code in ActionScript 3
Read the FT articleGet in touch
Freelance or full-time. Remote by preference, and open to hybrid from Paris
Twenty-three years, six cities