Full-Stack Product Engineer
Job description
Full-Stack Product Engineer at The Flex.
About the role
The role links product, engineering, and execution to build the operating system for modern renting. You will identify problems, design solutions, and ship products that automate operations and create seamless experiences for guests, landlords, and operators. The focus is on end-to-end delivery, automation, and platform reliability.
Software engineers turn product ideas into working code. Engineers work in small teams, review each other's work, and ship in small batches. Most teams follow agile practices such as sprints and daily standups. Engineers also write tests, fix bugs, and improve performance. The field values clear communication as much as technical skill. Engineers spend part of every week on planning, code review, and debugging, not just writing new code. The ability to explain a technical decision in plain words separates strong engineers from the rest.
Key facts
What you'll do
Design, build, test, and launch features end-to-end to create measurable business impact.
Convert operational challenges documented with founders and teams into software solutions that streamline workflows.
Release features quickly, gather feedback, iterate, and enhance products based on real-world usage to keep the system current.
Requirements
The posting states a bachelor's degree requirement. Show strong full-stack development experience across frontend and backend systems.
Demonstrate experience building production-grade web applications that serve real users.
Prove a strong understanding of APIs and databases to model data and integrations effectively.
Apply a product mindset and user-centric thinking to prioritize work and define clear outcomes.
Work independently and take ownership of results, decisions, and long-term product health.
Solve complex problems and communicate clearly in writing to align stakeholders and documentation.
Practical notes
This role operates in a startup environment with fast learning across engineering, product, operations, and AI.
Work is remote-first, and the role is based in Paris.
Typical interview steps
Hiring for engineering roles usually starts with a recruiter screen, followed by one or two technical rounds. Candidates often solve a coding problem, discuss past projects, and answer system design questions. Some loops include a take-home task. Final rounds typically cover team fit and give candidates a chance to ask questions. Interviewers look for how you break down an unfamiliar problem, not just whether you reach the answer. Practicing a few problems aloud and reviewing your own past projects are the best preparation.
Good to know
Modern stacks such as Python, FastAPI, React, and TypeScript are used on cloud infrastructure to deliver performance and maintainability.
AI and LLM integrations help enhance productivity and decision-making by automating complex tasks.
The platform targets PropTech, marketplaces, and SaaS to streamline renting operations for diverse users.
Team collaboration is closely aligned with founders and cross-functional partners to ensure shared goals.
Success is measured by launched features, automation impact, and faster product development cycles that drive business value.
Questions to ask
Worth asking in any interview: how the team measures success, who the role works with daily, what the onboarding looks like, and what the company is trying to achieve this year. Asking what past hires did well is a strong final question. Keep the list short and pick the questions that matter most to you.
Career growth
Engineering careers usually progress from individual contributor to senior, staff, and principal levels. Some engineers move into management and lead teams of five to twenty people. Others stay on the technical track. Growth follows demonstrated impact, not tenure alone. A typical engineering ladder has clear levels with defined expectations for scope, quality, and mentorship. Moving up usually requires owning outcomes end to end rather than completing assigned tickets.