Backend Engineer, Payments Team

SQUIRE; Buenos Aires; On-site; ARS 2,400,000 - 4,000,000; Full time

Job summary

SQUIRE is hiring a Senior Backend Engineer for the Payments Team in Buenos Aires. You will build and maintain payment systems and fintech infrastructure, focusing on secure transaction flows and ledger consistency.

This role reports to the Engineering Manager and involves cross-team collaboration with product engineering. Responsibilities include designing payment processing, code reviews, and contributing to hiring panels while working on-site two days per week in CABA.

Qualifications

• 7+ years of Node.js application development.
• Experience with payments processing in production.
• Knowledge of authorization, capture, refunds, chargebacks.
• Experience with reconciliation and financial ledgers.
• Idempotent operations in distributed systems.
• Strong communication and collaboration skills.
• Based in Buenos Aires; English proficiency required.
• On-site in our CABA office two days a week (Tue/Thu).

Responsibilities

• Build and maintain high-quality payment features and financial infrastructure using Node.js.
• Design, implement, and maintain payment processing flows, reconciliation, financial ledger systems including double-entry bookkeeping, and idempotent payment operations.
• Collaborate with product and other engineers to integrate payment systems with the platform.
• Participate in code reviews to improve code quality.
• Participate in interview panels for platform development hiring.
• Contribute to Platform Community and help shape hiring and tech policies.
• Work closely with Engineering Manager to follow direction and guidelines.
• Troubleshoot and resolve defects in payment-critical systems.

Skills

Node.js

Fintech domain

English

Team collaboration

Architecture patterns

Education

CS degree

Tools

Stripe API

Job description

Who We Are

SQUIRE is the leading business management system designed for the needs of barbers, shop owners, and their communities. We believe the pursuit of artistry and autonomy should not be restricted by the complexities of running a business. With SQUIRE, we provide custom-branded tools, resources, and guidance to help barbers of all stages and experience levels attract and retain more customers, efficiently manage their shop operations, and increase their revenue.

Who We Are

SQUIRE is the leading business management system designed for the needs of barbers, shop owners, and their communities. We believe the pursuit of artistry and autonomy should not be restricted by the complexities of running a business. With SQUIRE, we provide custom-branded tools, resources, and guidance to help barbers of all stages and experience levels attract and retain more customers, efficiently manage their shop operations, and increase their revenue. Founded in 2015, SQUIRE is trusted by more than 30,000 barbers across 5,000+ shops in more than a thousand cities worldwide. From streamlined booking and opening new shops to real-time earning dashboards and building lasting customer relationships, SQUIRE supports shop owners in seamlessly bridging the gap between their personal craft and business goals. SQUIRE enables barbers everywhere to unlock their full potential both as artists and as entrepreneurs.

For more information, please visit getsquire.com or download the SQUIRE app from the App or Play Store.

POSITION TITLE

Backend Engineer, Payments Team

Summary

The Senior Backend Engineer plays a crucial role in building and maintaining payment systems and financial infrastructure for our platform application. This is a key position within the Payments Team, requiring deep domain expertise in payment processing and fintech. The role is part of the Platform Community, with hiring and technology policies defined and owned by the Engineering Manager.

REPORTS TO

Engineering Manager

Job Duties And 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. The duties and responsibilities outlined above are not a comprehensive list and additional tasks may be assigned from time to time based on business needs.

Requirements And 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.
• Must be based in Buenos Aires.
• Availability to work on-site in our office in CABA two days a week (Tuesdays and Thursdays).

NICE TO HAVE

• Experience working with Stripe APIs and payment infrastructure.

Interview Accommodations

SQUIRE is committed to working with and providing reasonable assistance to individuals with physical and mental disabilities. If you are an individual with a disability requiring an accommodation to apply for an open position, please email your request to [e-mail] and someone on our team will respond to your request.

Equal Employment Opportunity

SQUIRE provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.

This applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation, and training.

Pay Transparency Nondiscrimination Provision

SQUIRE will not discharge or in any other manner discriminate against employees or applicants because they have inquired about, discussed, or disclosed their own pay or the pay of another employee or applicant. However, employees who have access to the compensation information of other employees or applicants as a part of their essential job functions cannot disclose the pay of other employees or applicants to individuals who do not otherwise have access to compensation information, unless the disclosure is (a) in response to a formal complaint or charge, (b) in furtherance of an investigation, proceeding, hearing, or action, including an investigation conducted by the employer, or (c) consistent with the contractor’s legal duty to furnish information.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.