Senior Frontend Engineer - Fintech Engineering (M/F/N)

InPost UK; Województwo mazowieckie; Hybrid; PLN 240,000 - 360,000; Full time

Benefits offered by this job

Ownership of business-critical fintech

Autonomy & continuous learning

Cloud-native & event-driven tech

Job summary

InPost Pay is building its own fintech platform and seeks a Senior Frontend Engineer to shape architecture and payment journeys for consumers and merchants. You will own frontend performance, security, and scale within a modern, AI-driven engineering environment in Poland. Hybrid work includes 1 day weekly in Warsaw or Cracow.

Join a lean team, collaborate with product and business groups, and contribute to cutting-edge technologies and platform evolution.

Qualifications

• 5+ years of experience building modern frontend applications.
• Proficiency with React, Vue, or Angular and TypeScript.
• Experience designing and implementing microfrontend architectures.
• Experience building and maintaining automated end-to-end tests using Playwright or similar frameworks.
• Understanding of frontend performance optimization, Core Web Vitals, profiling and bundle analysis.
• Experience integrating REST and GraphQL APIs.
• Familiarity with OAuth2, OIDC, JWT, feature flags, and progressive delivery approaches.
• Active use of AI tools to improve development efficiency and quality.
• Excellent English communication (B2 level or higher).

Responsibilities

• Design and implement microfrontend architecture across payment products and services.
• Own performance engineering and continuously improve Core Web Vitals for consumer and merchant apps.
• Participate in full development lifecycle from requirements to release.
• Integrate frontend with backend services using GraphQL and REST APIs.
• Implement real-time user experiences using Server-Sent Events and similar tech.
• Develop secure payment-related user interfaces following industry standards.
• Contribute to frontend tooling, developer experience, and modern engineering workflows.

Skills

React/Vue/Angular

TypeScript

Microfrontend architecture

Playwright testing

REST/GraphQL APIs

Performance & Core Web Vitals

OAuth2/OIDC/JWT

AI tools in development

English communication (B2+)

Frontend architecture & tooling

Tools

Playwright

Job description

Senior Frontend Engineer - Fintech Engineering (M/F/N)

• Full-time

InPost Pay is building its own fintech platform from the ground up. It’s a large-scale, international initiative where engineers will have the opportunity to shape the architecture, build core fintech components, and create solutions designed to operate at InPost’s scale.

We’re building a lean, highly effective engineering organization in Poland, with AI-native engineering at its core. We’re looking for strong engineers who are comfortable with agentic engineering, from experienced professionals building complex systems and engineering tooling to a new generation of engineers who have embraced AI-driven development from the start of their careers.

Hybrid working model: preferably 1 day per week in the Warsaw or Cracow office.

We're looking for a Senior Frontend Engineer to join our FinTech Platform team and help us build seamless payment experiences for consumers and merchants.

In this role, you'll own consumer-facing and merchant-facing payment journeys, driving frontend architecture, performance engineering, and product quality. You'll work across modern web technologies, contributing to highly scalable and secure payment solutions.
What will you work on?

• designing and implementing microfrontend architecture across payment products and services,
• owning performance engineering and continuously improving Core Web Vitals across customer-facing applications,
• participating in the full development lifecycle, from requirements and specification through testing and release,
• building integrations with backend services using GraphQL and REST APIs,
• implementing real-time user experiences using Server-Sent Events and similar technologies,
• developing secure payment-related user interfaces aligned with industry requirements and best practices,
• contributing to frontend tooling, developer experience, and modern engineering workflow.

This cooperation may be a strong match if you:

• have at least 5 years of experience building modern frontend applications,
• have hands-on experience with React, Vue, or Angular and TypeScript,
• have experience designing and implementing microfrontend architectures,
• have experience building and maintaining automated end-to-end tests using Playwright or similar frameworks,
• understand frontend performance optimisation, Core Web Vitals, profiling, and bundle analysis,
• have practical experience integrating REST and GraphQL APIs,
• are familiar with OAuth2, OIDC, JWT, feature flags, and progressive delivery approaches,
• actively use AI tools such as GitHub Copilot, ChatGPT, or Claude to improve development efficiency and quality,
• communicate in English at B2 level or higher.

Additional advantages:

• experience in payments, fintech, or e-commerce products,
• experience with WCAG accessibility standards,
• backend development experience in Node.js, Java, Python, or C#,
• experience building embeddable widgets or SDKs.

What we offer:

• the opportunity to build products that sit at the heart of InPost's growing financial services ecosystem,
• ownership of business-critical solutions operating at scale,
• a modern engineering environment focused on autonomy, accountability, and continuous learning,
• collaboration with highly experienced product, engineering, and business teams,
• access to cutting-edge technologies, event-driven architectures, and cloud-native solutions,
• opportunities to shape technical standards, mentor others, and influence platform evolution,
• full-time contract of employment.