Senior Software Engineer, Mobile – Repayment UX

Affirm

Senior Software Engineer specializing in React Native for Affirm's Repayment UX team growing in Europe. Responsible for delivering goals and leading engineers while enhancing user experiences.

Posted 7/14/2026full-timeRemote • 🇵🇱 PolandSenior💰 PLN 308,000 - PLN 428,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in developing and architecting mobile applications using React Native and Javascript/Typescript, while fostering a culture of quality and ownership within the team. Capable of leading engineers through ambiguity and collaborating effectively with cross-functional teams to deliver significant features and systems.

Highest-signal resume keywords

Mobile Application DevelopmentReact NativeJavascriptTypescriptCode Review Standards

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Mobile Application ArchitectureDeclarative UI FrameworksHigh Quality Code WritingTechnical PlanningLarge Code Base Management

Soft Skills

Verbal CommunicationWritten CommunicationTeam LeadershipFeedback and Guidance

Industry Keywords

CollaborationMetrics MonitoringQuality CultureProcess ImprovementProblem Solving

Tech Stack

Tools & technologies

JavaScriptReactReact NativeTypeScript

About the role

Key responsibilities & impact

Owning and delivering quarterly goals for your team
Leading engineers on your team through ambiguity to solve open-ended problems
Collaborating with product management, design & analytics by participating in ideation
Advocating for and leading in solving project, process, technology or business issues
Creating and monitoring metrics, escalating when needed
Fostering a culture of quality and ownership on your team by setting code review and design standards
Helping develop talent on your team by providing feedback and guidance

Requirements

What you’ll need

4+ years of experience of developing and architecting mobile applications, preferably using declarative UI frameworks like React Native.
Proficient in working with Javascript/Typescript, or have a track record of working with similar languages and learning new technologies.
Experience defining a technical plan for the delivery of a significant feature or system component with an elegant, simple and extensible design.
Write high quality code that is easily understood and used by others.
Proficient at making significant changes in a large code base, and have developed a suite of tools and practices that enable you and your team to do so safely.
Strong verbal and written communication skills that support effective collaboration with our global engineering team.

Benefits

Comp & perks

100% subsidized medical coverage, dental and vision for you and your dependents
Flexible Spending Wallets for tech, food and lifestyle
Away Days - wellness days to take off work and recharge
Learning & Development programs
Parental benefits
Employee Resource & Community Groups
ESPP - An employee stock purchase plan enabling you to buy shares of Affirm at a discount