Senior Payments Platform Backend Engineer

Squire; San Carlos de Bolívar; Hybrid; ARS 1,800,000 - 3,000,000; Full time

Job summary

SQUIRE is seeking a Senior Backend Engineer to build and maintain comprehensive payment systems and fintech infrastructure within the Platform. This role focuses on payment processing, reconciliation, and double-entry ledgers, collaborating with cross-functional teams and participating in hiring discussions.

The ideal candidate has 7+ years in Node.js development, strong payments experience, and excellent English communication skills, with a preference for a bachelor's in CS.

Qualifications

• At least 7 years of experience in application development using Node.js.
• Proven experience in the payments or fintech domain, including working with payment processing systems in production.
• Strong understanding of the payment processing lifecycle: authorization, capture, refund, void, and chargebacks.
• Experience with reconciliation processes between internal systems and external payment providers.
• Familiarity with financial ledgers and double-entry bookkeeping principles.
• Experience designing idempotent operations in distributed payment systems.
• Strong knowledge of architecture patterns, frameworks, and best practices.
• Strong communication and collaboration skills.
• Bachelor's degree in Computer Science is preferred.
• English proficiency is a must. It’s important you can communicate your ideas clearly as you will be interacting with English-speaking coworkers.

Responsibilities

• Build and maintain high-quality payment features and financial infrastructure using Node.js.
• Design, implement, and maintain reliable payment processing flows, reconciliation processes, financial ledger systems including double-entry bookkeeping, and idempotent payment operations.
• Collaborate with the product team and other engineers to ensure seamless integration of payment systems with the broader platform.
• Actively participate in code reviews, providing and receiving constructive feedback to improve overall code quality.
• Participate in interview panels related to platform development hiring.
• Contribute to the Platform Community, sharing knowledge and helping to shape hiring and technology policies.
• Work closely with the Engineering Manager, following the guidelines and direction provided by the Engineering Manager.
• Troubleshoot and resolve software defects and other technical issues in payment‑critical systems.

Skills

Node.js

Payments domain

Payment lifecycle

Reconciliation

Financial ledgers

Idempotent operations

Architecture patterns

Communication

English proficiency

Education

Bachelor's degree in CS

Tools

Stripe APIs

Job description

SQUIRE is seeking a Senior Backend Engineer to build and maintain comprehensive payment systems and fintech infrastructure within the Platform. This role focuses on payment processing, reconciliation, and double-entry ledgers, collaborating with cross-functional teams and participating in hiring discussions.

The ideal candidate has 7+ years in Node.js development, strong payments experience, and excellent English communication skills, with a preference for a bachelor's in CS.