Backend Engineer, Payments Team WHO WE ARESQUIRE 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\nJOB 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. \nInterview AccommodationsSQUIRE 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 recruiting@getsquire.com and someone on our team will respond to your request.Equal Employment OpportunitySQUIRE 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 ProvisionSQUIRE 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.