Sr Software Engineer, Smart Mobility (C#/.NET)

TransCore is hiring a Senior Software Engineer to build backend services, APIs, and web experiences for its cloud-native Smart Mobility platform. The role develops and operates Azure-based services and contributes across the stack, while owning features through production and mentoring engineers.

Responsibilities:

• Service development: Design, build, test, and operate scalable backend services and APIs in C# and .NET, including asynchronous and multi-threaded processing of high-volume transaction data
• Cloud-native patterns: Build services that run as containers on Azure, scale horizontally, degrade gracefully, and handle retries, idempotency, and backpressure correctly
• Event-driven processing: Implement message-driven and event-driven workflows using queues and streaming technologies such as Azure Service Bus, Event Hubs, Kafka, or RabbitMQ
• Integrations: Build and maintain integrations to internal tolling and account-management systems, payment providers, and partner APIs against published interface contracts
• Authentication and API standards: Implement authentication and authorization to standard, using OAuth 2.0 and OpenID Connect for user and service flows, JWT validation, scopes and claims, TLS and mTLS for service-to-service calls, and no hand-rolled auth
• Data layer: Design schemas, write and tune queries, and own data access and migrations across relational and NoSQL stores
• Full stack contribution: Contribute to Angular and TypeScript front ends for customer and operator web applications as product needs require
• Testing: Write unit and integration tests as part of the definition of done, and partner with QA Automation on coverage for the features you build
• Production ownership: Own your services in production, respond to issues in the code you own, and take part in on-call rotation and root cause analysis as the team matures
• Instrumentation and telemetry: Instrument services with OpenTelemetry traces, metrics, and logs against the platform standard, and use Dynatrace and the Grafana stack to answer what a service is actually doing in production
• Secure by default: Build to security and PCI-DSS expectations, including safe handling of payment and personal data, secrets management, and secure API design
• Performance: Profile and tune services against throughput and latency targets, and identify scaling limits before they reach production
• Design participation: Take part in design reviews and technical decisions, document what you build, and make the tradeoffs explicit
• Code review and mentoring: Review peer code, mentor less experienced engineers, and help set the coding standards and patterns for a new codebase
• Agile delivery: Work in sprints, give realistic estimates, and surface risk early rather than late

Requirements:

• Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent practical experience
• 10 to 13 years of professional software development experience, with recent hands-on work building production services
• Strong C# and .NET experience, including .NET Core or later, ASP.NET Core Web API, and asynchronous or multi-threaded programming
• Practical experience with message queues or event streaming, and with the failure modes of distributed systems
• Working knowledge of authentication and API security standards, including OAuth 2.0, OpenID Connect, JWT, TLS and mTLS, and safe handling of tokens, keys, and secrets in application code
• Experience designing systems that scale, including caching, partitioning, load distribution, and performance tuning
• Strong database skills, including schema design and query tuning in SQL Server or PostgreSQL
• Experience with containers and Docker, and comfort working in a CI/CD environment with Git-based source control
• Strong debugging, analytical, and written communication skills
• Demonstrated experience designing and operating cloud-native applications on Azure, AWS, or GCP
• Azure preferred
• Experience instrumenting applications for observability, ideally with OpenTelemetry
• using an APM or dashboarding platform such as Dynatrace, Grafana, or Application Insights to diagnose real production problems
• Front-end development experience with Angular and TypeScript, including HTML5, CSS3, and modern single-page application patterns
• Working knowledge of Python or Go as a secondary language
• Experience integrating with an identity provider such as Microsoft Entra ID, Auth0, or Okta, including SAML, SCIM, or agency and enterprise single sign-on
• Experience with OpenAPI-first API design, versioning, and contract testing
• Experience with Kubernetes or Azure Kubernetes Service
• Experience with NoSQL or document stores such as Cosmos DB, and with caching layers such as Redis
• Experience with payments, digital wallets, or high-security transaction processing, including PCI-DSS environments
• Experience with systems that interface with IoT devices, BLE beacons, roadside hardware, or telematics, and with high-volume real-time data ingestion
• Background in mobility, transportation, tolling, parking, or logistics technology
• Experience using approved AI-assisted engineering tools responsibly to accelerate development and troubleshooting