Build core fintech infrastructure — banking rails, crypto wallets, trading systems
Full stack: React (web) + Node.js/PostgreSQL + AWS CDK + payments/crypto integrations
5+ years engineering experience with fintech or financial systems
We're looking for someone who can start within the next 1 month.
About Us
We are a Hong Kong-based fintech company building mission-critical financial infrastructure across payments, trading, custody, and digital assets. This is an opportunity to work on core platform systems that handle real-time transactions and serve institutional clients. We value engineers who take ownership, ship with urgency, and care deeply about building secure, reliable financial systems.
Responsibilities
Develop and maintain full stack features across web and backend services (Node.js, PostgreSQL) powering the company's fintech platform
Integrate fiat banking rails and payment infrastructure including ACH, card issuing, ledger systems, and real-time payment networks (e.g., FPS, SWIFT)
Build and integrate crypto wallet infrastructure, including non-custodial wallet solutions, key management, and on-chain transaction handling
Implement authentication and security solutions including passkeys, device biometrics, OAuth, WebAuthn, and session management to protect client assets and data
Design and consume REST APIs; build robust, well-documented service interfaces for internal and external consumption
Participate in architecture decisions shaping system scalability, security, fault tolerance, and user trust across the platform
Define and deploy cloud infrastructure using AWS CDK, applying infrastructure-as-code practices for reproducible, auditable, and version-controlled deployments
Champion engineering best practices including code reviews, automated testing, CI/CD pipelines, observability, and comprehensive documentation
Mentor junior and mid-level engineers; contribute to technical hiring and building the engineering team culture
Requirements
Bachelor's or Master's degree in Computer Science, Software Engineering, or a related field, or equivalent professional work experience
Minimum 5 years of professional full stack engineering experience, with demonstrated work on financial or fintech systems
Strong proficiency in TypeScript, Node.js, and React; experience with PostgreSQL or equivalent relational databases
Experience designing and consuming REST APIs in production environments
Hands‑on experience with AWS and infrastructure-as-code tooling
Solid understanding of authentication models (OAuth, WebAuthn, session security) and security best practices for financial applications
Proven ability to work effectively with AI coding agents and to critically review the code and changes they produce
Self‑starter with strong ownership mentality who thrives in ambiguous, fast‑paced environments; comfortable proposing solutions and driving them to completion
Preferences
The following are not required, but candidates with any of these will stand out:
Familiarity with AWS CDK specifically
Experience with fintech or payments APIs (e.g., Stripe, Plaid, Marqeta, Column, Lithic, Unit) or banking integration (ACH, card networks, ledger systems)
Familiarity with crypto wallets, key management, smart contracts (Solana or EVM chains), or DEX aggregators
Fluency in native iOS (Swift) and/or native Android (Kotlin) development
Proficiency in Cantonese and/or Mandarin
Hiring Process
Candidates progress through the following stages and must pass each one to advance to the next:
Programming screening
— an unproctored multiple-choice test covering core programming fundamentals
Technical interviews
— two live interviews (no coding) of similar content, each conducted by a different interviewer, building on the candidate's screening answers and covering software engineering fundamentals and problem-solving
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or continue with email
Full stack: React (web) + Node.js/PostgreSQL + AWS CDK + payments/crypto integrations
5+ years engineering experience with fintech or financial systems
We're looking for someone who can start within the next 1 month.
About Us
We are a Hong Kong-based fintech company building mission-critical financial infrastructure across payments, trading, custody, and digital assets. This is an opportunity to work on core platform systems that handle real-time transactions and serve institutional clients. We value engineers who take ownership, ship with urgency, and care deeply about building secure, reliable financial systems.
Responsibilities
Develop and maintain full stack features across web and backend services (Node.js, PostgreSQL) powering the company's fintech platform
Integrate fiat banking rails and payment infrastructure including ACH, card issuing, ledger systems, and real-time payment networks (e.g., FPS, SWIFT)
Build and integrate crypto wallet infrastructure, including non-custodial wallet solutions, key management, and on-chain transaction handling
Implement authentication and security solutions including passkeys, device biometrics, OAuth, WebAuthn, and session management to protect client assets and data
Design and consume REST APIs; build robust, well-documented service interfaces for internal and external consumption
Participate in architecture decisions shaping system scalability, security, fault tolerance, and user trust across the platform
Define and deploy cloud infrastructure using AWS CDK, applying infrastructure-as-code practices for reproducible, auditable, and version-controlled deployments
Champion engineering best practices including code reviews, automated testing, CI/CD pipelines, observability, and comprehensive documentation
Mentor junior and mid-level engineers; contribute to technical hiring and building the engineering team culture
Requirements
Bachelor's or Master's degree in Computer Science, Software Engineering, or a related field, or equivalent professional work experience
Minimum 5 years of professional full stack engineering experience, with demonstrated work on financial or fintech systems
Strong proficiency in TypeScript, Node.js, and React; experience with PostgreSQL or equivalent relational databases
Experience designing and consuming REST APIs in production environments
Hands‑on experience with AWS and infrastructure-as-code tooling
Solid understanding of authentication models (OAuth, WebAuthn, session security) and security best practices for financial applications
Proven ability to work effectively with AI coding agents and to critically review the code and changes they produce
Self‑starter with strong ownership mentality who thrives in ambiguous, fast‑paced environments; comfortable proposing solutions and driving them to completion
Preferences
The following are not required, but candidates with any of these will stand out:
Familiarity with AWS CDK specifically
Experience with fintech or payments APIs (e.g., Stripe, Plaid, Marqeta, Column, Lithic, Unit) or banking integration (ACH, card networks, ledger systems)
Familiarity with crypto wallets, key management, smart contracts (Solana or EVM chains), or DEX aggregators
Fluency in native iOS (Swift) and/or native Android (Kotlin) development
Proficiency in Cantonese and/or Mandarin
Hiring Process
Candidates progress through the following stages and must pass each one to advance to the next:
Programming screening
— an unproctored multiple-choice test covering core programming fundamentals
Technical interviews
— two live interviews (no coding) of similar content, each conducted by a different interviewer, building on the candidate's screening answers and covering software engineering fundamentals and problem-solving
#J-18808-Ljbffr
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