Mobile App Development Company in Warsaw

Polish payment and banking rails are what move a Warsaw app budget — a scoped MVP at Warsaw rates, a production dual-platform native app (Swift plus Kotlin) with BLIK, PSD2 Open Banking, biometric SCA, push notifications, and a UODO-aligned privacy stack, or full marketplace, banking, or healthtech apps with multi-region backends, fraud signals, and KNF outsourcing documentation. Polish engineering talent consistently ranks in the global top three on HackerRank, so Warsaw delivery is materially cheaper than London, Munich, or Amsterdam at equivalent quality. We give fixed-fee proposals rather than open T and M estimates.

Yes. BLIK is effectively mandatory for any Polish commerce, marketplace, or peer-to-peer app, and we integrate against Polski Standard Platnosci APIs covering one-time codes, BLIK Mobile Payments inside merchant apps, P2P transfers, and BLIK cheque codes for cash withdrawal. We implement the consumer-tested confirmation flow that PKO BP IKO, mBank, and Allegro have collectively normalised so Polish users do not abandon checkout. For PSD2 Open Banking we integrate against the Polish bank sandboxes (PKO BP, mBank, Pekao, ING, Santander, Alior, Millennium, Credit Agricole Polska, Citi Handlowy) using either direct STET, NextGenPSD2 Berlin Group, or PolishAPI variants depending on the bank, and we route through aggregators (Kontomatik, Tink, TrueLayer) where the licensing and KNF outsourcing economics earn it. Strong customer authentication follows PSD2 RTS Article 4 and Article 9 dynamic linking.

Both, scoped to the problem. We default to native Swift and Kotlin when the app is a banking, payments, or marketplace product where App Store and Play Store reviews, animations, deep system integration (BLIK SDKs, Apple Pay, Google Pay, Health Kit, biometrics), and offline reliability matter, which mirrors what Allegro, Booksy, IKO, mBank, and PeoPay actually do in production. We default to React Native or Flutter when a Polish startup or scale-up needs one codebase across iOS and Android at a PLN-economic burn rate and the feature set is feasible inside the cross-platform envelope. We never ship hybrid wrappers (Cordova-class WebView shells) for a Polish consumer audience, because the App Store and Play Store conversion penalty against Allegro and Booksy-grade competitors is too steep.

Every Codazz Warsaw mobile engagement opens with a GDPR Article 35 DPIA scoped against the Polish Personal Data Protection Act of 10 May 2018 and UODO guidance, including UODO's published positions on mobile SDKs, advertising identifiers, and behavioural analytics. We minimise personal data at the SDK boundary, document the lawful basis under Article 6 (and Article 9 for health categories in DocPlanner-style apps), implement Article 22 automated-decision safeguards for any in-app scoring, and build deletion and rectification flows that respect Articles 17 and 16 directly from the app settings screen. iOS App Tracking Transparency, Apple Privacy Manifests, and Google Play Data Safety disclosures are completed by us, not left as a launch-week scramble. Analytics defaults to EU-region Firebase, EU-hosted PostHog, or self-hosted Matomo so behavioural telemetry never leaves the EEA without a documented Article 46 transfer mechanism.

Yes. We ship mobile flows that authenticate users through Profil Zaufany via gov.pl, sign documents through ePuap, pull insured-person data from the ZUS PUE platform where the user consents, and query CEIDG (Centralna Ewidencja i Informacja o Dzialalnosci Gospodarczej) for sole-trader verification during onboarding. For business apps we additionally integrate KRS (Krajowy Rejestr Sadowy) lookups and white-list VAT taxpayer checks against the Biala Lista of the Ministerstwo Finansow. Public-sector and citizen-facing apps land with WCAG 2.1 AA conformance and a published accessibility statement under the Polish Public Sector Accessibility Act 2019 (Ustawa o dostepnosci cyfrowej stron internetowych i aplikacji mobilnych podmiotow publicznych).

Banking and fintech apps ship with KNF Recommendation D model and IT risk discipline, PSD2 Regulatory Technical Standards strong customer authentication (Article 4 inherence, knowledge, possession with Article 9 dynamic linking), certificate pinning, runtime application self-protection where third-party SDKs justify it, jailbreak and root detection, and secure-enclave or StrongBox key storage for cryptographic material. We follow OWASP MASVS Level 2 with MASTG-aligned penetration testing by an independent CREST-accredited firm before each major release. KNF outsourcing notifications and BFG (Bankowy Fundusz Gwarancyjny) resolution-readiness documentation are produced by us in Polish when the engagement requires it, and we coordinate with the bank's Chief Information Security Officer and internal audit on every release cut.

A focused MVP with BLIK, single sign-on, and a hosted backend on AWS eu-central-1 or Azure Poland Central typically launches in twelve to twenty weeks. A full production dual-platform app with PSD2 Open Banking, fraud signals, push, deep linking, App Clips and Instant Apps, and the KNF documentation package lands in six to nine months. Allegro and Booksy-class marketplace builds with multi-region backends, search ranking, and reputation systems run nine to fifteen months. App Store and Play Store review for a Polish-launching app generally clears in one to three business days when the privacy manifest, ATT prompt, Data Safety form, and KNF disclaimers are pre-aligned with the Polish-language store listing. We have repeatedly shipped to this cadence inside KNF-supervised stacks.

Mobile R&D that includes genuinely novel work (BLIK plus AI scoring fraud models, on-device Polish-language NLP, e-prescription pipelines, novel SDK frameworks) typically qualifies for support from NCBR Szybka Sciezka, FENG (Fundusze Europejskie dla Nowoczesnej Gospodarki 2021-2027), KPO (Krajowy Plan Odbudowy) digital components, and PARP grants for Polish SMEs, with non-dilutive intensity often between 25 and 80 percent depending on company size and research category. Polish mobile projects also frequently combine NCBR funding with Horizon Europe, Digital Europe Programme, and EIC Accelerator instruments. We deliver time-tracked logs, technical narratives, experiment histories, and failed-hypothesis documentation aligned with NCBR audit requirements, and we coordinate with PAIH (Polish Investment and Trade Agency) when the client is building or scaling a Polish R&D hub. Final eligibility sits with your grant consultant and the funding body.