Fullstack Engineer (Frontend-Focused – Payments & Wallets)
Location:
Remote / Indonesia
Company:
Xellar
About Xellar
Xellar is building the future of digital payments and wallets for Southeast Asia. Our products —
Xellar Wallet
,
Xellar Vault
, and
Rampable
— power seamless crypto and fiat transactions across borders. We enable users and businesses to send, receive, and store digital assets safely, bridging Web2 payment experiences with Web3 technology.
If you're passionate about creating fast, intuitive payment experiences that make crypto usable for everyone, we want you on the team.
Role Overview
We're looking for a
Fullstack Engineer
with a strong
frontend focus
to help build and scale Xellar's payments and wallet applications.
You'll work closely with our product, design, and backend teams to deliver clean, high-performing interfaces and bring our payment flows — from QRIS to stablecoin settlement — to life.
Responsibilities
- Build and maintain web applications for Xellar Wallet and payment dashboard
- Develop frontend experiences using
React /
and modern component libraries - Collaborate with backend engineers to design and integrate RESTful/GraphQL APIs
- Optimize UI performance for speed, responsiveness, and scalability
- Implement secure flows for onboarding, KYC, and transactions
- Work closely with product designers to turn complex payment processes into simple, intuitive interfaces
- Ensure code quality through reviews, testing, and documentation
Requirements
- 3+ years
experience in fullstack or frontend development (React, , ) - Strong grasp of
modern UI/UX principles
and responsive design - Experience with
TypeScript
,
REST/GraphQL APIs
, and
state management (Redux, Zustand, etc.) - Basic knowledge of backend systems , Express/NestJS, PostgreSQL)
- Experience with
payment or fintech applications
is a big plus - Understanding of
authentication, wallet integrations
, or
crypto transactions - Ability to work in a fast-paced environment and take full ownership of features
Bonus Points
- Experience building or integrating
payment gateways
,
QRIS
, or
stablecoin payments - Familiarity with
crypto wallets / ) - Strong eye for design and experience collaborating with UI/UX teams
- Knowledge of
AWS
,
CI/CD
, or
Docker
What We Offer
- Competitive salary + potential equity/token options
- Work with cutting-edge payment infrastructure in Southeast Asia
- Flexible remote setup and global exposure
- Small, agile team with huge ownership opportunities
- Be part of a company reshaping how crypto meets everyday payments