UST · 20 hours ago
POS Client Lead Engineer
San Antonio
Full-time
Onsite
Senior Level, Lead/Staff
$94K/yr - $141K/yr
10+ years expUST is a mission-driven company focused on transforming lives through technology. The POS Client Lead Engineer will lead the design, development, and delivery of client-side POS software used across retail stores, ensuring robust integration and operational excellence.
ConsultingInformation TechnologyInformation Services
Responsibilities
Lead the architecture, design, and implementation of POS client applications across store environments
Define coding standards, UI/UX patterns, and architectural guidelines for the POS client platform
Develop and maintain POS client features by integrating to backend APIs
Integrate with payment terminals, peripherals (scanners, scales, printers), and store hardware
Collaborate with backend teams to integrate POS clients with APIs, microservices, and enterprise systems (pricing, catalog, loyalty, payments)
Support production rollout, monitoring, and troubleshooting of POS client applications
Lead root cause analysis for store incidents and drive long term fixes
Work with product managers to refine requirements and translate them into technical solutions
Partner with QA and automation teams to ensure robust test coverage and certification readiness
Engage with store operations to understand real world workflows and improve usability
Qualification
Required
10+ years of software engineering experience, with at least 3 years focused on POS or retail systems
Strong expertise in client-side development (Core Java, C/C++)
Strong expertise in Linux based Operating Systems (Preferably Debian based)
Experience integrating with payment devices, peripherals, and hardware drivers
Deep understanding of distributed systems, offline first patterns, and store edge constraints
Proven ability to lead engineering teams and drive technical direction
Preferred
Experience with microservices, containerization, or edge compute platforms
Knowledge of PCI DSS, secure coding practices, and payment flows
Background in large scale retail environments with high transaction volumes
Familiarity with CI/CD pipelines, automated testing, and observability tools
Benefits
Full-time, regular employees accrue a minimum of 10 days of paid vacation per year
Receive 6 days of paid sick leave each year (pro-rated for new hires throughout the year)
10 paid holidays
Eligible for paid bereavement leave and jury duty
Eligible to participate in the Company’s 401(k) Retirement Plan with employer matching
Eligible for medical, dental, and vision insurance
Basic life insurance
Accidental death and disability insurance
Short- and long-term disability benefits
May purchase additional voluntary short-term disability benefits
Participate in a Health Savings Account (HSA)
Flexible Spending Account (FSA) for healthcare, dependent child care, and/or commuting expenses as allowable under IRS guidelines
Company
UST
UST is a Digital Transformations Solutions Provider.
10001+ employees
H1B Sponsorship
UST has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (870)
2024 (800)
2023 (647)
2022 (634)
2021 (612)
2020 (984)
Funding
Current Stage
Late StageTotal Funding
$250MKey Investors
Temasek Holdings
2018-06-27Private Equity· $250M
Leadership Team
Krishna Sudheendra
CEO
Alexander Varghese
Chief Administrative Officer & COO
Recent News
Orange County Business Journal
2026-01-24
2026-01-20
Company data provided by crunchbase