Responsibilities

• Universal payment forms so they adapt seamlessly to dozens of PSPs and alternative payment methods.
• Design and implement core architectural layers (state management, validation) with very little templating or styling overhead.
• Build and maintain responsive, accessible, localized UIs that work the same in a desktop browser or an in‑app WebView Drive end‑to‑end integrations with external systems (payment gateways, risk engines), owning everything from sandbox setup to production rollout.
• Hunt down and squash issues at the browser / WebView / mobile‑app boundary, including postMessage channels and iframe security.
• Ship incrementally through a modern CI/CD pipeline, writing meaningful tests and automating what can be automated.
• Review code, share knowledge, and keep our standards high.

Qualifications

• General programming Solid CS fundamentals and at least one additional language beyond JS (e.g., Go, PHP, C, Python)
• JavaScript mastery
• Deep understanding of the runtime, event loop, performance profiling, and browser APIs even without a framework
• TypeScript advanced types
• Comfortable with generics, conditional types, utility types, declaration merging, and strict null checks
• Framework‑free web Able to build interactive widgets in vanilla JS/TS, using Web Components or your own patterns where appropriate Backend exposure
• Hands‑on experience writing APIs, workers, or micro‑services in any language
• External integrations Proven record of integrating 3rd‑party SDKs and REST/GraphQL APIs, especially payments
• Cross‑system debugging
• Skilled at diagnosing issues that appear only in embedded browsers, hybrid apps
• Nice to have: experience in fintech, payments, billing, or PCI‑DSS environments; knowledge of security best practices (CSP, sandboxing, tokenization)

Conditions & Benefits

• Stable salary, official employment.
• Health insurance.
• Hybrid work mode and flexible schedule.
• Relocation package offered for candidates from other regions.
• Access to professional counseling services including psychological, financial, and legal support.
• Discount club membership.
• Diverse internal training programs.
• Partially or fully paid additional training courses.
• All necessary work equipment.