# 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/fr/careers/fullstack-ai-native-engineer-fintech

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# Fullstack AI-Native Engineer (Fintech)

Développement Vietnam Flexible Temps plein

[Postuler à ce poste](https://hiringmiyagami.tickup.vn/jobs/fullstack-ai-native-engineer-fintech) [Toutes les offres](https://www.miyagami.com/fr/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+

Comment nous évaluons

Deux évaluations de soixante minutes : l'une sans outils d'IA, l'autre avec vos propres agents. Toutes deux sont notées sur les mêmes scorecards que pour chaque placement.

[Sélection](https://www.miyagami.com/fr/how-we-vet)

Autres offres

- [Comptable général](https://www.miyagami.com/fr/careers/general-accountant-2)
- [Staff AI-Native Engineer (Node.js / React, orienté backend)](https://www.miyagami.com/fr/careers/staff-ai-native-engineer-node-js-react-backend-heavy)
- [Développeur AI-Native Fullstack](https://www.miyagami.com/fr/careers/fullstack-developer-senior)

Où nous travaillons

Amsterdam, London, Hô Chi Minh-Ville et Da Nang.

[Nos bureaux](https://www.miyagami.com/fr/locations)

Parlons-en

## Recevez une shortlist en trois jours

Vous nous indiquez les postes et la stack dans un court formulaire ou lors d'un appel de trente minutes. Sous trois jours ouvrés, vous recevez des ingénieurs seniors nommés à examiner, chacun avec ses deux scorecards, et vous pouvez les recruter sous cinq.

[Obtenir une liste restreinte](https://www.miyagami.com/fr/shortlist)

Évalué sur **Clutch** 39 avis

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