Responsibilities

• Evolve our 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

Must‑have skills

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