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Pennylane

Senior Fullstack Software Engineer, Ruby/React, TypeScript

Pennylane

. Understand and frame user and product problems .

Posted 9/18/2026full-timeRemote • FranceSeniorWebsite

Core Competencies

Role fit
Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in Ruby on Rails and React, with a strong focus on building scalable, user-centered products. Proven ability to lead technical initiatives, mentor engineers, and improve engineering practices through collaboration and effective communication.

Highest-signal resume keywords
Ruby On RailsReactTypeScriptProblem SolvingTechnical Leadership

ATS Keywords

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Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills
Ruby On RailsReactTypeScriptData AnalysisMonitoringObservabilityCode ReviewsDocumentationAI-Assisted DevelopmentScalable Solutions
Soft Skills
Strong CommunicationCollaborationMentoringOwnershipFeedback
Tools & Technologies
Monitoring ToolsObservability ToolsData Analysis Tools
Industry Keywords
User-Focused ProductsTechnical DeliveriesEngineering PracticesTech Community ContributionRemote Work

Tech Stack

Tools & technologies
ReactRubyRuby on RailsTypeScript

About the role

Key responsibilities & impact
  • Understand and frame user and product problems
  • Lead significant technical deliveries within the squad, from problem definition through production operation
  • Build reliable, scalable, user-focused products
  • Investigate and resolve complex production issues using monitoring, observability, and data analysis tools
  • Design and evolve robust, performant, scalable, and reliable solutions
  • Bring expertise in a major part of the technology stack and become autonomous on high-impact initiatives
  • Improve engineering practices through code reviews, pair programming, documentation, RFCs, and AI-assisted development
  • Mentor engineers, share knowledge, provide feedback, and improve technical skills and ways of working
  • Collaborate with other teams and communicate progress, risks, decisions, and results
  • Contribute to the tech community through technical content, onboarding, interviews, incident resolution, initiatives, and meetups

Requirements

What you’ll need
  • Strong hands-on experience with Ruby on Rails and React (at least 7-8 years)
  • Strong product and business understanding
  • Experience solving complex problems
  • Strong communication skills and ability to articulate ideas clearly
  • Collaborative approach and ownership of reliable, pragmatic solutions
  • Ability to work remotely from a country of residence in Europe
  • Residence within a maximum time difference of two hours from the CET time zone
  • Right to work in the European Union
  • No visa sponsorship available
  • Ruby on Rails experience
  • React and TypeScript experience

Benefits

Comp & perks
  • 30 vacation days paid by Pennylane
  • Company shares
  • Home workspace budget
  • Monthly coworking-space allowance
  • Access to 8000 fitness spaces in Europe and more than 300 wellness activities through Gymlib
  • Busuu access to improve English or French
  • Latest Apple equipment
  • Company events, including quarterly Tech Days and an annual company seminar
  • France-based employees: 6 to 13 RTT, 5 weeks PTOs, lunch credits (Swile), Alan Blue healthcare cover, and regular city events
  • Competitive compensation package