Veasnapiseth Ren
Résumé

Open to senior backend roles

Veasnapiseth Ren (Piseth)Senior Backend / API Engineer

I build secure, well-tested APIs for banking, insurance and fintech.

8+ years delivering regulated systems for clients in Norway, Singapore, France and Switzerland, from a core banking platform used by 65+ banks to payment-provider and national-identity integrations. Currently Senior Developer & Tech Lead at Slash Foundry in Phnom Penh.

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Phnom Penh, Cambodia · UTC+7

~ % curl -s veasnapiseth.pages.dev/resume.json \
  | jq '{name: .basics.name,
         role: .basics.label,
         focus: [.skills[:4][].name]}'
{
  "name": "Veasnapiseth Ren",
  "role": "Senior Backend / API Engineer",
  "focus": [
    "Backend & APIs",
    "Cloud & infrastructure",
    "Security & compliance",
    "Data"
  ]
}
This résumé is also an API. GET /resume.json ›
8+years building production backend systems
65+banks running on a core banking platform I helped build
2government system integrations: national identity and tax refund
4client countries: Norway, Singapore, France, Switzerland

Built for systems that can’t fail quietly.

Most of my work sits where money, identity and regulation meet: banking cores, payment layers and government integrations. These are systems where a bug is a compliance problem, not just a support ticket.

I lead delivery as well as write code. I set quality standards, review, mentor, and make the technical calls that keep systems secure and on schedule. Lately that has included AI-native products: document processing, OCR pipelines and LLM integrations with AWS Bedrock, OpenAI and Claude.

Regulated systems. Delivered.

Client work is described by sector and scale rather than by name, out of respect for client confidentiality.

Core banking platform for 65+ banks

Full-stack developer · Banking, Norway

–

A corporate-card and core banking platform rolled out to more than 65 banks in Norway, served white-label from one shared platform.

  • Engineered white-label multi-tenancy so many banks run on one shared platform.
  • Built secure authentication and third-party integrations to banking compliance and security standards.
  • Designed and maintained GDPR-compliant enterprise AWS infrastructure.
  • Oversaw infrastructure security audits and penetration testing.
  • Built the web and mobile banking apps: corporate cards, spending controls, transactions and reporting.
  • Multi-tenancy
  • AWS
  • GDPR
  • Secure auth
  • Web & mobile

Payment abstraction layer & national identity

Full-stack engineer · Insurance, Singapore

–

Enterprise insurance platforms for the corporate innovation team of a global insurer, in a regulated environment with strict release standards.

  • Delivered a payment abstraction layer that puts multiple payment providers behind one interface.
  • Built secure integration with SingPass, Singapore's national digital identity service.
  • Shipped through automated quality gates in Jest and Cypress to meet compliance and deployment standards.
  • Worked in mixed Scrum teams of 3–12 engineers across Cambodia and Singapore.
  • Payments
  • SingPass
  • Jest
  • Cypress
  • Scrum

AI document-processing platform

Lead backend engineer · AI

–

Backend and API delivery for an AI-native platform that turns unstructured documents into structured data.

  • Led backend and API delivery for the platform.
  • Integrated OCR extraction into the document-processing flow.
  • Built messaging integrations and runtime language switching.
  • AI
  • OCR
  • APIs
  • Messaging
  • i18n

Gold trading platform

Technical lead · Financial services, Switzerland & Singapore

–

A trading platform where every transaction has to be correct, delivered on schedule under my technical lead.

  • Backend on Node.js, Express and PostgreSQL, built for scalable transaction handling and data integrity.
  • Strengthened web security and made unit testing faster and more thorough.
  • Introduced peer review and cross-quality checks across the team.
  • Led research and proofs of concept for integrating third-party investment services.
  • Node.js
  • Express
  • PostgreSQL
  • Tech lead

Government-integrated tax-refund platform

Backend & mobile developer · GovTech, France

–

An airport tax-refund claim platform integrated with the French government's system.

  • Built the backend, the web back office and the mobile app.
  • Implemented secure data exchange with the French government system.
  • Gov integration
  • Backend
  • Back office
  • Mobile

Experience.

Senior Developer & Tech Lead

Slash Foundry Co., Ltd. · Phnom Penh, Cambodia

– Present

End-to-end delivery for international clients: GenAI recruitment platforms, AI document processing, enterprise insurance applications, and banking platforms serving 65+ financial institutions. As tech lead I own delivery oversight, application security, quality standards, mentoring and technical decisions.

Engagements

Tech specs.

Backend & APIs
Node.js, TypeScript, Express, NestJS, Java / Spring Boot, C# / ASP.NET, REST API design
Cloud & infrastructure
AWS ECS, Lambda, EC2, API Gateway, VPC, S3, RDS, CloudWatch, Event-driven & queues
Security & compliance
Secure authentication, SingPass / national ID, GDPR-compliant infra, Security audits, Penetration testing
Data
PostgreSQL, MongoDB, MySQL, DynamoDB
Quality
TDD, Jest, Cypress, Peer review, Quality gates
AI
AWS Bedrock, Vector databases, OpenAI, Claude, OCR pipelines
Frontend & mobile
React, Next.js, Tailwind CSS, Blazor, React Native, Flutter, Swift, Kotlin
Blockchain
Solidity, R3 Corda

Education & languages.

Education

  • Master of Science, Information Technology & EngineeringRoyal University of Phnom Penh · GPA 3.75 / 4.002019–2021
  • Bachelor of Science, Computer ScienceRoyal University of Phnom Penh · GPA 3.88 / 4.002015–2019
  • IT Expert Training ProgramKorea Software HRD Center2017–2019
  • Mobile Application DevelopmentCambodia-Korea Cooperation Center2017–2018

Certification

  • Corda Certified Developer (Blockchain)R3Certified

Languages

  • KhmerNative
  • EnglishProfessional (C1)

Hiring for a senior backend role?

I’m open to senior backend and API engineering roles. The quickest way to reach me is below.

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