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

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.