2 days ago
San Diego, CA, USAMid Level / Senior
Base Salary
$105k - $135k/yr
Responsibilities
- Build and maintain card-present payment integrations with Adyen, Shift4, Global Payments, and other providers for the self-service kiosk platform.
- Own authorization, capture, voids, refunds, reversals, reconciliation, and recovery from payment timeouts and partial failures.
- Work with processor certification teams to certify integrations and move them into production.
- Maintain PCI DSS-compliant payment flows using P2PE and tokenization.
- Troubleshoot live payment issues across terminals, kiosks, and backend services.
- Implement unit, integration, and end-to-end tests and work toward high test coverage.
- Participate in code reviews, design sessions, architecture improvements, and stakeholder collaboration.
- Evaluate AI-generated code outputs for security and correctness.
Requirements
- 2 to 5 years of backend development experience in Java or a comparable object-oriented programming language.
- Experience implementing unit, integration, and end-to-end testing strategies.
- Hands-on experience integrating with at least one payment processor or gateway API; card-present or terminal integration is strongly preferred.
- Understanding of EMV, contactless payments, authorization, and settlement flows.
- Working knowledge of PCI DSS and secure payment-data handling.
- Ability to debug across network, device, and service boundaries.
- Understanding of software security practices including OAuth, JWT, and encryption.
- Bachelor’s degree in Computer Science or a related field, or equivalent professional experience.
- Experience with AWS serverless technologies and services such as DynamoDB and SQS is beneficial but not required.
- Strong communication, analytical, problem-solving, and continuous-improvement skills.
Benefits
- Hybrid work arrangement requiring the employee to be in San Diego, California.
- Medical, dental, vision, FSA, healthcare and dependent-care reimbursement programs, an Employee Assistance Program, and Optum Care 24-hour confidential medical counseling.
- Ten paid holidays per calendar year.
- 15 days of PTO during the first 12 months and 22 days in subsequent years for eligible full-time employees; prorated PTO for eligible part-time employees.
- Eligibility to participate in the company 401(k) plan beginning on the employment start date.
- College tuition and education assistance, Udemy courses, and ongoing learning and development opportunities.
About Tillster
Tillster builds a unified commerce platform for multi‑unit restaurant chains, offering online and mobile ordering, delivery management, kiosks, loyalty, and integrated marketing with POS integrations. The privately held company, founded in 2002 and headquartered in Los Angeles, serves global brands including Burger King, Baskin‑Robbins, and Jollibee. Its SaaS model supports personalized guest engagement across channels for large restaurant enterprises.