Senior Frontend Software Engineer (mfd)

Were building a platform a unified system used organization-wide to manage and serve content for both web and mobile apps across all markets where InPost operates.

The platform gives content editors a visual interface to build and publish pages. Behind the scenes its a TypeScript monorepo with a PayloadCMS admin panel an Astro SSR web renderer and a custom shared design system.
We are looking for a seasoned engineer (typically 4 years building production frontend applications) who understands the complexities of working in a large international organization. You arent just a coder; you are a problem solver who understands how technical decisions impact global scalability multi-market rollouts and localization.
Youll work at the intersection of product design and engineering. We expect you to bring experience from other mature organizations challenge our ideas and help us navigate the challenges of a multi-language multi-region platform.
We also believe AI is reshaping frontend development. We want someone who has already adaptedusing AI tools naturallyand can help the team raise the bar.

Your Responsibilities

• 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
   

Qualifications :

Must Have

• 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 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

Nice to Have

• Familiarity with PayloadCMS or another headless CMS
• Experience working in monorepos and complex build pipelines
• Experience building rich text editors (Lexical TipTap etc.)
• Experience integrating LLM APIs into user-facing features
• Knowledge of performance measurement (Core Web Vitals)
• Interest in design token systems and style pipelines
   

Additional Information :

Why Join InPost

• 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 youll 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

Remote Work :

Yes

Employment Type :

Full-time