Senior Frontend Software Engineer

InPost Group

Senior Frontend Software Engineer at InPost, building a unified system for managing content across web and mobile apps. Join a tech team that values AI and scalability in e-commerce delivery solutions.

Posted 4/11/2026full-timeRemote • 🇵🇱 PolandSeniorWebsite

Tech Stack

Tools & technologies

JavaScriptNext.jsReactTypeScript

About the role

Key responsibilities & impact

Develop new features focusing on architecture, scalability, and internationalization standards
Take ownership of your solutions — you own the outcome and quality of what you build
Drive the evolution of our shared design system to support multiple brands and markets
Own accessibility (a11y) as a first-class concern across all our international sites
Build complex UI features: block-based editor interactions, undo/redo, and previews
Experiment with and integrate LLM-based tools into our products and workflows
Drive AI adoption within the team — help establish best practices
Work with strict TypeScript to design safe, ergonomic APIs
Maintain and extend our E2E test suite (Playwright) to ensure stability across regions
Mentor junior engineers and foster a culture of technical excellence
Participate in architectural decision-making — we use lightweight RFCs and collective ownership to align on technical direction

Requirements

What you’ll need

Proven experience in an international organization or working on large-scale products serving multiple markets
Deep knowledge of HTML and CSS (cascade, specificity, layout systems)
Strong React skills — combined with Engineering thinking: you are a software engineer, not just a React developer
Experience with Next.js, Astro, or similar modern frameworks
Strong TypeScript (strict mode, generics, conditional types)
Experience with multi-language / multi-site architectures (i18n, l10n complexities)
Solid web accessibility expertise (WCAG 2.1/2.2)
Experience designing and contributing to design systems
Understanding of SSR and hydration trade-offs
Experience mentoring or onboarding less experienced engineers
Practical experience with AI tools in development
Ability to work with cross-functional teams and influence stakeholders

Benefits

Comp & perks

Opportunity to work in a diverse, international and cross-functional environment, along with leading experts.
Fulfilling careers with a range of benefits for employees and invests in providing training opportunities for their development.
Your impact will be visible instantly and you will be making a difference in our users lives
Real ownership — you'll make architectural calls that impact multiple markets
A platform with genuine complexity worth solving (international scale, complex CMS)
Space to experiment with AI tooling and bring new ideas into production
A mature, experienced team that values technical depth

ATS Keywords

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Hard Skills & Tools

TypeScriptHTMLCSSReactNext.jsAstroE2E testingPlaywrightweb accessibilityAI tools

Soft Skills

ownershipmentoringtechnical excellenceinfluencing stakeholderscollaboration