Software Engineer IV, Payment Platform
Hands-on senior Java engineer owning the transaction-processing core of Toshiba's retail payment platform: the TCP terminal transport layer, store-and-forward fallback, BIN-based routing, and production incident root-cause analysis. Stack includes Java/Spring Boot, Maven, Jenkins CI/CD, Vue 3/TypeScript, Docker/Kubernetes, and OpenTelemetry.
- Compensation
- Not disclosed
- Location
- Durham, NC
- Work setup
- Not specified
- Seniority
- Not specified
- Employment
- Contract
- Experience
- 8+ years
- Category
- Software engineering
- Posted
Skills
Must have
- Must be located near or within the Raleigh-Durham area
- Must be able to work in the US without current or future visa sponsorship
- Bachelor's degree in computer science or related field
- 8+ years building production distributed systems in Java, with deep experience in stateful, protocol-level code (sockets, retries, timeouts, backoff, idempotency)
- Direct experience with payment processing, card-present transaction flows, or a domain where correctness under partial failure has real financial consequences
- Strong debugging skills for intermittent, timing-sensitive defects; reproduce failures deterministically rather than relying on retries
- Working knowledge of PCI data security standards and what they require of code touching transaction data
- Experience with high-availability configurations for backend services, including application server, database, and hardware failover
- Proficiency with Spring Boot, socket-level communication, Maven, CI/CD, and Git at team scale
- Clear technical writing demonstrated through RCAs, ADRs, or adopted design documentation
- Comfort mentoring and reviewing other engineers' work in a shared, high-stakes codebase
- Sufficient Vue 3 and TypeScript proficiency to read and debug the POS Client codebase and negotiate API contracts
- Daily professional use of an AI coding agent in a production codebase with judgment on when output needs verification
Nice to have
- Experience with EMV, contactless (Mastercard/Visa) specifications, or issuer/network certification processes
- Experience with store-and-forward or offline-transaction patterns in any domain
- Familiarity with retail point-of-sale hardware or terminal integration
- Experience with cloud microservices (Azure) and container orchestration (Docker/Kubernetes)
- Knowledge of SQL and non-relational databases such as MongoDB
- Knowledge of REST API design and Swagger/OpenAPI documentation
- Experience directing AI coding agents through bounded, spec-driven tasks in a regulated or high-consequence codebase
- Software development related certifications
Full description
Note: Toshiba Global Commerce Solutions will not be providing visa sponsorship for this position now or in the future. Therefore, in order to be considered for this position, you must have the ability to work in the United States without a need for current or future visa sponsorship. Must be located near or within the Raleigh-Durham area.
Toshiba Global Commerce Solutions is seeking a hands-on Senior Engineer IV to lead the transaction-processing core of our payment systems platform. Responsibilities include ownership of the terminal transport layer, store-and-forward (SAF) handling, decline and exception fallback logic, and BIN-based routing to ensure reliable card-present payments across our retail network.
This is a hands-on role, not focused on requirements documentation or committee work. You will work directly with transport and transaction-state code, reproduce terminal-level failures, and manage fixes through to production. Success requires strong expertise in banking and card payments, including issuers, card networks, acquiring processors, authorization and settlement flows, and distributed-systems engineering.
This position offers a clear path to payment architecture ownership. You will apply your distributed-systems and Java expertise, learn our payment transaction lifecycle and terminal protocols through hands-on defect resolution and root-cause analysis in your first year, and advance to architectural ownership of the payment transport and transaction-integrity layer.
Our technology stack includes Java and JavaScript applications built with Maven and delivered through a Jenkins CI/CD pipeline. We use a Vue 3/TypeScript POS checkout client that interacts with our transaction and device APIs. Docker and Kubernetes support our build, test, and deployment processes. We use OpenTelemetry for observability across transaction and transport paths, and follow an AI-first development model in which coding agents operate within defined scopes and must provide test and security evidence before changes are accepted.
Responsibilities
- Take ownership of the TCP transport layer between terminals and the payment platform, including heartbeat and keepalive validation, idle-connection management, and reconnect or timeout handling.
- Manage store-and-forward (SAF) behavior for declined or unreachable authorizations, ensuring fallback activates only for genuine connectivity or timeout issues, and not for legitimate declines that should not be queued or replayed.
- Oversee BIN-based routing and processor or network selection logic, including handling BIN table changes, program updates, and network-specific contactless or EMV requirements.
- Diagnose and resolve terminal-side exceptions and faults that appear as ambiguous errors, identifying root causes in code, protocol, or hardware and firmware interactions, rather than relying on retries.