Senior Full-Stack Engineer – Product, UX

Dolead

. Design and develop features end-to-end across the stack, from React interfaces to Python services .

Posted 10/26/2026full-timeParis • FranceSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates strong expertise in React and TypeScript/JavaScript for building user-facing web products, with a focus on improving user experience and performance. Possesses a data-driven mindset to validate decisions and enhance conversion rates through collaboration with cross-functional teams.

Highest-signal resume keywords

React ExpertiseTypeScript/JavaScript ProficiencyWeb Performance OptimizationEnd-to-End Feature DevelopmentFluent in French and English

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

ReactTypeScriptJavaScriptPythonWeb PerformanceResponsive DesignA/B TestingProduct AnalyticsCROUsability Testing

Soft Skills

ProactiveClear CommunicationCollaborationProblem-SolvingUX Sensitivity

Tools & Technologies

APIsMobile Web ProductsGrowth Marketing ToolsAI-Assisted Development Tools

Industry Keywords

Product-Led EnvironmentsUser JourneysLanding PagesB2CCall-Center Products

Tech Stack

Tools & technologies

JavaScriptPythonReactTypeScript

About the role

Key responsibilities & impact

Design and develop features end-to-end across the stack, from React interfaces to Python services
Contribute to technical decisions and pragmatic trade-offs between speed, quality, and maintainability
Improve landing-page architecture, performance, and user experience
Extend user journeys beyond initial conversion into qualification, follow-up, and call-center interactions
Identify friction, challenge existing flows, and propose simpler experiences
Build responsive and usable mobile-web experiences
Turn ideas into hypotheses, build prototypes, instrument user interactions, and test outcomes
Use data to validate decisions and iterate quickly
Improve conversion, revenue, reliability and quality of critical user journeys, UX, and validated learning
Work directly with Product and Business to understand user behaviour, constraints, and priorities
Contribute to discussions, challenge assumptions, and lead specific problems or initiatives
Collaborate within the Perfect User Journey squad alongside Engineering, Product, and Business

Requirements

What you’ll need

8+ years of software engineering experience, ideally in product-led environments
Strong expertise in React and TypeScript/JavaScript
Proven experience building and scaling user-facing web products
Strong understanding of web performance, front-end architecture, and responsive experiences
Strong UX sensitivity and ability to identify friction and propose improvements without detailed designs
Enough back-end autonomy to build and deliver complete features end-to-end
Comfortable working with APIs and backend services; Python experience highly valued
Data-driven and experimental mindset
Proactive and comfortable with ambiguity
Strong product and business awareness
Pragmatic approach to engineering
Comfortable working in a small, multidisciplinary team
Clear and reliable communication with technical and non-technical stakeholders
Fluent French and English
Nice to have: experience in a recognised product company or scale-up
Nice to have: experience with high-traffic B2C journeys, landing pages, or mobile web products
Nice to have: hands-on experience with A/B testing, product analytics, CRO, or usability testing
Nice to have: exposure to growth, marketing, conversion, or acquisition
Nice to have: experience with voice AI, telephony, or call-center products
Nice to have: experience using AI-assisted development tools such as Claude Code
Nice to have: entrepreneurial or early-stage experience

Benefits

Comp & perks

SideCare health insurance, fully covered by Dolead
Swile lunchcard lunch voucher: 13€/day, 50% coverage by Dolead
25 vacation days and 8 RTT
Flexible remote policy: up to 2–4 days/week, depending on team organization
Multicultural environment with 13+ nationalities represented
Monthly team and company events