InPost

Staff Software Engineer, Frontend - Fintech Platform (m/f/n)

InPost
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13 hours ago
Warsaw, PolandStaff+

Responsibilities

  • Define and maintain frontend architecture across Payments Core, Merchant, or Consumer platform areas.
  • Establish component architecture, design-system boundaries, micro-frontend patterns, client-side state management, and performance budgets across multiple teams.
  • Author ADRs, RFCs, and design documentation while facilitating cross-team technical decisions and trade-off analysis.
  • Evaluate frontend frameworks, libraries, build tooling, rendering strategies, and accessibility standards.
  • Evolve, instrument, and measure adoption of the agentic development harness for frontend workflows.
  • Drive organization-wide adoption or deprecation of frontend patterns and design-system components without direct authority.
  • Provide technical input into product strategy and mentor Staff-track engineers through reviews, pairing, and technical writing feedback.

Requirements

  • 8+ years of software engineering experience, including 2+ years of cross-team technical leadership or architecture authority.
  • 3+ years building customer-facing or merchant-facing products in payments or fintech.
  • Expert-level experience with a modern frontend framework such as React and TypeScript at scale.
  • Experience with design systems and component architecture across multiple teams or products.
  • Experience with micro-frontend architecture, client-side state management, performance engineering, Core Web Vitals, bundle optimization, and rendering-strategy trade-offs.
  • Experience incorporating accessibility standards such as WCAG into architecture.
  • Experience with REST, GraphQL, asynchronous, and event-based API consumption patterns.
  • Experience designing or evolving an agentic engineering harness, including instrumentation, adoption measurement, and iteration.
  • Excellent technical writing skills for ADRs, RFCs, and design documents for multiple audiences.
  • English proficiency at B2 or above and a university degree in Computer Science, IT, or a related field.
  • Nice-to-have qualifications include platform or internal developer tooling experience, agentic or LLM system design, BNPL or lending experience, React Native, real-time UI patterns, internationalization architecture, open-source contributions, technical publishing, and Polish language skills.

Benefits

  • Hybrid working model with preferably one day per week in the Warsaw or Cracow office.
  • B2B type of contract.
  • Flexible hours and an excellent working environment.
  • Opportunity to work in a diverse, international, and cross-functional environment with senior leadership exposure.
  • Training and development opportunities within a growing European company.
  • Opportunity to shape a large-scale international fintech platform and work with AI-native engineering practices.

Tech Stack

GraphQLReactReact NativeTypeScript

Categories

InPost

About InPost

5,001-10,000 employees

InPost is a public logistics company listed on Euronext Amsterdam that builds and operates an out-of-home parcel delivery network for e-commerce. Its network includes more than 50,000 out-of-home pick-up points, including over 27,000 parcel lockers, plus to-door courier and fulfillment services for online merchants across Poland, the UK, Italy, Iberia, France and Benelux. Headquartered in Luxembourg, it acquired French operator Mondial Relay in 2021.

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