{"id":3400894,"url":"https://alion.io/job/inpost-senior-frontend-engineer-fintech-engineering-mfn","title":"Senior Frontend Engineer - Fintech Engineering (M/F/N)","company":{"id":3343,"name":"InPost","domain":"inpost.eu","url":"https://alion.io/company/inpost","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"SmartRecruiters","truth_index":{"grade":"B","score":75,"open_postings":11,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":25,"computed_at":"2026-10-31T05:58:55Z"}},"role":"Frontend","role_family":"Frontend","seniority":"senior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Warsaw, Poland"],"countries":["PL"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":56000,"max_usd":95000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":40},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"Angular","optional":false},{"name":"C#","optional":false},{"name":"ChatGPT","optional":false},{"name":"Claude","optional":false},{"name":"Copilot","optional":false},{"name":"GraphQL","optional":false},{"name":"Java","optional":false},{"name":"Node JS","optional":false},{"name":"PCI DSS","optional":false},{"name":"Playwright","optional":false},{"name":"Progressive Delivery","optional":false},{"name":"Python","optional":false},{"name":"React.js","optional":false},{"name":"Rest API","optional":false},{"name":"TypeScript","optional":false},{"name":"Vue.js","optional":false},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-10-28T12:45:54Z","employer_posted_date":"2026-10-28","last_verified_at":"2026-10-31T13:23:07Z","board_verified":true,"closed_at":null,"days_open":3,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":3},"description":"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.\nWe’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.\n→ Hybrid working model: preferably 1 day per week in the Warsaw or Cracow office.\n 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.\nIn 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.\nWhat will you work on?\ndesigning and implementing microfrontend architecture across payment products and services,\nowning performance engineering and continuously improving Core Web Vitals across customer-facing applications,\nparticipating in the full development lifecycle, from requirements and specification through testing and release,\nbuilding integrations with backend services using GraphQL and REST APIs,\nimplementing real-time user experiences using Server-Sent Events and similar technologies,\ndeveloping secure payment-related user interfaces aligned with industry requirements and best practices,\ncontributing to frontend tooling, developer experience, and modern engineering workflow.\n This cooperation may be a strong match if you:\nhave at least 5 years of experience building modern frontend applications,\nhave hands-on experience with React, Vue, or Angular and TypeScript,\nhave experience designing and implementing microfrontend architectures,\nhave experience building and maintaining automated end-to-end tests using Playwright or similar frameworks,\nunderstand frontend performance optimisation, Core Web Vitals, profiling, and bundle analysis,\nhave practical experience integrating REST and GraphQL APIs,\nare familiar with OAuth2, OIDC, JWT, feature flags, and progressive delivery approaches,\nactively use AI tools such as GitHub Copilot, ChatGPT, or Claude to improve development efficiency and quality,\ncommunicate in English at B2 level or higher.\nAdditional advantages:\nexperience in payments, fintech, or e-commerce products,\nknowledge of PCI DSS requirements, CSP configuration, and secure browser-based architectures,\nexperience with WCAG accessibility standards,\nbackend development experience in Node.js, Java, Python, or C#,\nexperience building embeddable widgets or SDKs.\n What we offer:\nthe opportunity to build products that sit at the heart of InPost's growing financial services ecosystem,\nownership of business-critical solutions operating at scale,\na modern engineering environment focused on autonomy, accountability, and continuous learning,\ncollaboration with highly experienced product, engineering, and business teams,\naccess to cutting-edge technologies, event-driven architectures, and cloud-native solutions,\nopportunities to shape technical standards, mentor others, and influence platform evolution,\nfull-time contract of employment.","description_format":"text","description_chars":3538,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"English","level":"Upper-Intermediate (B2)","optional":false}]},"benefits":["Continuous learning","Hybrid 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