Senior TypeScript Backend Engineer - Fintech (Remote, Flexible)

EthBerry; Tangerang; Hybrid; IDR 280,000,000 - 460,000,000; Full time

Benefits offered by this job

Full-remote work with flexible hours

14 paid vacation days

7 paid sick days

Public holidays in residence country

Laptop provided and software licences

Competitive compensation based on経験

Direct participation in architecture/技

No health insurance or office-based or

Job summary

EthBerry seeks a senior engineer to design and deliver production financial systems, including ledgers, payments, and reconciliation. You’ll own the full engineering lifecycle, model money, and ensure idempotent, auditable operations. Collaboration spans delivery, finance, and compliance across complex workflows.

You will design APIs, implement signed webhooks, and build React/Next.js interfaces for investigation and resolution, with a strong emphasis on observability and testing.

Qualifications

• 5+ years building and operating production backend or full-stack software.
• Strong TypeScript and Node.js, including API design, asynchronous programming, testing, and production debugging.
• Production experience with money paths: ledger, wallet, acquiring, payouts, payment infrastructure, or settlement.
• Strong PostgreSQL, SQL, data-modelling, and transactional-consistency skills.
• Practical understanding of idempotency, concurrency, webhooks, asynchronous processing, and partial-failure recovery.
• Experience building or maintaining React and Next.js applications.
• Production ownership including CI/CD, monitoring, incident investigation, and incremental delivery.
• Strong written and spoken English for client and team communication.

Responsibilities

• Design and deliver payment, ledger, wallet, payout, billing, or settlement services in TypeScript and Node.js.
• Model money using integer minor units, explicit currencies, rounding rules, value dates, and immutable postings.
• Implement idempotent APIs and effectively-once financial effects under retries and duplicate events.
• Integrate payment providers and banks through signed webhooks, asynchronous workflows, correlation identifiers, and recovery paths.
• Build reconciliation processes that identify matched, missing, duplicate, and mismatched records.
• Implement explicit lifecycle states for authorisation, capture, settlement, holds, fees, refunds, reversals, and disputes where relevant.
• Develop React and Next.js operational interfaces for investigation and controlled manual resolution.
• Write automated integration tests around transaction boundaries, concurrency, retries, and failure recovery.
• Establish observability and audit trails suitable for production financial operations.
• Participate in client discovery, explain trade-offs, estimate work, and review human- and AI-generated code.

Skills

TypeScript

Node.js

API design

PostgreSQL

Data modelling

Idempotency & retries

React & Next.js

CI/CD & monitoring

English communication

Tools

NestJS

Job description

EthBerry seeks a senior engineer to design and deliver production financial systems, including ledgers, payments, and reconciliation. You’ll own the full engineering lifecycle, model money, and ensure idempotent, auditable operations. Collaboration spans delivery, finance, and compliance across complex workflows.

You will design APIs, implement signed webhooks, and build React/Next.js interfaces for investigation and resolution, with a strong emphasis on observability and testing.