# Fullstack AI-Native Engineer (Fintech) | Miyagami

> Fullstack AI-Native Engineer (Fintech) at Miyagami, Vietnam. We’re building financial infrastructure where a duplicated payment or a ledger that doesn’t…

Source: https://www.miyagami.com/nl/careers/fullstack-ai-native-engineer-fintech

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# Fullstack AI-Native Engineer (Fintech)

Development Vietnam Flexibel Fulltime

[Solliciteer op deze functie](https://hiringmiyagami.tickup.vn/jobs/fullstack-ai-native-engineer-fintech) [Alle vacatures](https://www.miyagami.com/nl/careers)

We’re building financial infrastructure where a duplicated payment or a ledger that doesn’t balance is a serious incident. We need a fullstack engineer with deep backend and payments experience, who works with AI agents every day and takes full responsibility for what ships.

What You’ll Do

- Build and own high-performance backend services in Node.js and TypeScript for payment flows, including asynchronous workflows and webhook processing
- Integrate with external fintech APIs and handle their real-world behavior: retries, timeouts, out-of-order events, and partner downtime
- Design idempotent payment processing and transaction handling on PostgreSQL that holds up under heavy concurrency
- Build and maintain immutable ledger and reconciliation logic so the numbers always add up
- Deliver the frontend for these features in React.js and TypeScript, and make system design decisions across the stack
- Design and run AI orchestration and multi-agent workflows, including task delegation, context management, and validation of agent outputs
- Use AI tools and agents across coding, debugging, testing, documentation, and code review
- Verify everything AI produces before it reaches production. You own the result, whoever or whatever wrote the first draft
- Raise blockers, risks, and unclear requirements early with the team instead of guessing

## What you bring

- Expert-level experience building high-performance backend systems with Node.js and TypeScript, including asynchronous workflows and webhook engineering
- Hands-on experience integrating external fintech APIs in production
- Expert knowledge of PostgreSQL transactions, isolation levels, locking, and concurrency
- Proven experience designing idempotent payment processing
- Strong system design skills
- Good knowledge of financial systems: transactions, immutable ledgers, and core accounting concepts (double-entry, balances, settlement)
- Working familiarity with BaaS, CaaS, Open Finance, and reconciliation
- Solid frontend skills in React.js and TypeScript, able to deliver features end to end
- Hands-on experience with AI orchestration and multi-agent workflows, including managing context across concurrent agent tasks
- Daily, practical use of AI tools and agents, with a real example of catching an AI mistake before it shipped
- Proficient English communicator experienced in collaborating across distributed, remote teams

Nice to Have

- Experience with payment providers, card networks, or banking partners
- Background in compliance-heavy environments (audit trails, PCI, KYC/AML)
- Experience with agent context files (e.g., [CLAUDE.md](http://CLAUDE.md)-style) and persistent-memory tooling for agents

## Skills

Backend Development Asynchronous Workflows Webhook Engineering Fintech API Integration PostgreSQL Database Transactions Idempotent Payment Processing System Design Financial Systems Immutable Ledgers Double-Entry Accounting Reconciliation BaaS CaaS Open Finance Frontend Development AI Tools AI Agents English (C1) IELTS 7.0+

Hoe we beoordelen

Twee assessments van zestig minuten: één met AI-tools uit en één met je eigen agents aan het werk. Beide beoordelen we met dezelfde scorecards die we bij elke plaatsing gebruiken.

[Hoe wij screenen](https://www.miyagami.com/nl/how-we-vet)

Andere vacatures

- [General Accountant](https://www.miyagami.com/nl/careers/general-accountant-2)
- [Staff AI-Native Engineer (Node.js / React, Backend-Heavy)](https://www.miyagami.com/nl/careers/staff-ai-native-engineer-node-js-react-backend-heavy)
- [Fullstack AI-Native Developer](https://www.miyagami.com/nl/careers/fullstack-developer-senior)

Waar we werken

Amsterdam, London, Ho Chi Minh City en Da Nang.

[Onze kantoren](https://www.miyagami.com/nl/locations)

Laten we praten

## Ontvang binnen drie dagen een shortlist

Je deelt de rollen en de stack in een kort formulier of in een gesprek van dertig minuten. Binnen drie werkdagen krijg je senior engineers op naam om te beoordelen, elk met beide scorecards, en je kunt binnen vijf werkdagen inhuren.

[Vraag een shortlist aan](https://www.miyagami.com/nl/shortlist)

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Plan een afspraak van dertig minuten met Dale

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[Boekingspagina openen](https://sales.miyagami.com/meetings/dwesdorp)