Sr Software Engineer, Smart Mobility

TransCore•Norcross, GA

11d•Hybrid

About The Position

TransCore is building Smart Mobility, a cloud-native mobility platform that lets people move through tolling, parking, and transit from their phone, and connects the agencies, partners, and consumer apps behind it. We are looking for a Senior Software Engineer to build backend services, APIs, and web experiences that make that platform work. This is a hands-on senior individual contributor role on a small, fast-moving team. You will design and build cloud-native services on Azure in C# and .NET, work across the stack from message-driven backend processing to the customer and operator web portals, and own your features from design through production. The platform is new, so the patterns you set are the ones the team will build on.

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.
Demonstrated experience designing and operating cloud-native applications on Azure, AWS, or GCP, with Azure preferred.
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.
Experience instrumenting applications for observability, ideally with OpenTelemetry, and using an APM or dashboarding platform such as Dynatrace, Grafana, or Application Insights to diagnose real production problems.
Strong debugging, analytical, and written communication skills.

Nice To Haves

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.

Responsibilities

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.
Build services that run as containers on Azure, scale horizontally, degrade gracefully, and handle retries, idempotency, and backpressure correctly.
Implement message-driven and event-driven workflows using queues and streaming technologies such as Azure Service Bus, Event Hubs, Kafka, or RabbitMQ.
Build and maintain integrations to internal tolling and account-management systems, payment providers, and partner APIs against published interface contracts.
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.
Design schemas, write and tune queries, and own data access and migrations across relational and NoSQL stores.
Contribute to Angular and TypeScript front ends for customer and operator web applications as product needs require.
Write unit and integration tests as part of the definition of done, and partner with QA Automation on coverage for the features you build.
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.
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.
Build to security and PCI-DSS expectations, including safe handling of payment and personal data, secrets management, and secure API design.
Profile and tune services against throughput and latency targets, and identify scaling limits before they reach production.
Take part in design reviews and technical decisions, document what you build, and make the tradeoffs explicit.
Review peer code, mentor less experienced engineers, and help set the coding standards and patterns for a new codebase.
Work in sprints, give realistic estimates, and surface risk early rather than late.