A Software Engineer at TransCore plays a pivotal role in designing, developing, and maintaining the critical infrastructure that powers modern transportation. As a leader in Intelligent Transportation Systems (ITS) and open road tolling, TransCore relies on its engineering teams to build high-performance, real-time data processing systems. These applications process massive streams of transactional data collected from roadside tolling equipment, executing complex business logic and decision-making algorithms with sub-second latency.

In this role, your work directly impacts millions of commuters daily. You will be responsible for building robust, multi-threaded backend services and APIs that run primarily in Linux-based production environments. This is a highly collaborative engineering environment where you will work alongside system designers, database administrators, and hardware integration teams to deliver seamless, end-to-end smart mobility solutions.

The technical complexity of this position is high, requiring a deep understanding of concurrent programming, event-driven architectures, and database optimization. Because TransCore systems must maintain near-perfect uptime, engineers must write clean, highly testable code that can withstand the rigorous demands of public infrastructure.

To help you prepare effectively, we have compiled representative questions based on real interview experiences at TransCore. These questions reflect the typical focus areas you will encounter, ranging from language-specific mechanics to database design and behavioral alignment.

C# and .NET Core Internals

TransCore backend systems heavily leverage C# and modern .NET frameworks. Interviewers will test your deep understanding of language syntax, memory management, and concurrent programming.

• Explain the difference between task-based asynchronous programming (async/await) and multi-threading in C#.
• How does the Garbage Collector work in .NET, and how can you optimize your code to minimize GC overhead in a high-throughput system?

To succeed in the TransCore interview process, you must approach your preparation with a structured mindset. The company values practical, hands-on engineering capabilities over abstract theoretical puzzles.

Role-Related Knowledge – You must demonstrate deep expertise in your primary development stack. For most software engineering roles at TransCore, this means showcasing an advanced understanding of C#, .NET Core, Linux environments, and relational databases like SQL Server or MySQL.

Problem-Solving Ability – Your interviewers will evaluate how you break down complex, ambiguous problems. Be prepared to explain your architectural choices, trade-offs between performance and maintainability, and your approach to debugging real-time production issues.

Adaptability & Collaboration – Because TransCore projects involve close integration between software, hardware, and client requirements, you need to show that you can collaborate effectively across departments. Highlighting your experience in Scrum environments and cross-functional teams is highly beneficial.

Resilience & Professionalism – Interview experiences at TransCore can vary widely depending on the office location and department. Demonstrating a calm, professional demeanor—even when faced with challenging or unconventional interviewing styles—is a key indicator of your readiness for enterprise-level engineering.

The interview process at TransCore typically moves quickly, though the exact structure depends on the seniority of the role and the specific office location. Candidates generally experience a process that balances initial screening with deep technical conversations.

Initially, you will undergo a recruiter or HR phone screening to discuss your background, salary expectations, and overall alignment with the role. This is often followed by a technical screen, which may focus on database development, SQL optimization, or core programming concepts.

The final stage usually involves a panel interview with technical leads, senior engineers, and department heads. This round focuses heavily on your technical decision-making, architectural knowledge, and team fit. Be prepared for a highly structured discussion that dives deep into your resume and past project experience.

The timeline above outlines the standard progression from your initial application to the final offer stage. While some candidates report receiving offers very quickly—sometimes even on the same day as their technical interview—others experience a more structured multi-week process. Managing your preparation around these distinct stages will help you maintain momentum and perform at your best.

.NET Backend & Multi-Threading

Because TransCore systems handle high-volume transaction processing, writing efficient, concurrent code is a core requirement. Interviewers will closely evaluate your ability to build multi-threaded applications that maximize system throughput without introducing race conditions or deadlocks.

Be ready to go over:

• Concurrency Utilities – Deep knowledge of Thread, Task, SemaphoreSlim, and concurrent collections in .NET.
• Asynchronous Patterns – Best practices for implementing asynchronous workflows to prevent thread pool starvation.
• Resource Lock Management – How to safely access shared resources in a multi-threaded environment.
• Advanced concepts (less common) – Low-level memory management, profiling CPU usage, and analyzing thread dumps to identify performance bottlenecks.

Example scenarios:

• "Explain how you would design a background service in .NET Core that continuously polls a message queue and processes messages concurrently using a limited number of worker threads."
• "Describe a scenario where you encountered a deadlock in production and the tools or techniques you used to resolve it."

Database Engineering & SQL Optimization

A significant portion of your technical evaluation will focus on your ability to work with relational databases. You must prove that you can write efficient SQL queries, design scalable database schemas, and optimize database performance for read-and-write-heavy applications.

Be ready to go over:

• Query Optimization – Analyzing execution plans, identifying table scans, and restructuring queries for maximum efficiency.
• Database Normalization – Designing schemas that minimize redundancy while ensuring data integrity.
• Indexing Strategies – Choosing the right indexes for specific query patterns and understanding their impact on write performance.
• Advanced concepts (less common) – Database partitioning, replication strategies, and writing high-performance stored procedures.

Example scenarios:

• "Walk me through how you would optimize a query that is taking several seconds to execute on a table containing tens of millions of toll transaction records."
• "How would you design a database schema to track vehicle transponder reads across multiple toll plazas while maintaining historical accuracy?"

Event-Driven Architecture & Containerization

Modern TransCore applications are increasingly modular, utilizing microservices, message queues, and containerization to ensure scalability and ease of deployment.

Be ready to go over:

• Message Queues – Experience with asynchronous messaging systems (e.g., RabbitMQ, Kafka, or ActiveMQ).
• Docker & Containerization – Building, packaging, and deploying containerized applications in Linux environments.
• CI/CD Pipelines – Understanding how to automate testing and deployment using tools like GitHub Actions, Jenkins, or Azure DevOps.
• Advanced concepts (less common) – Service mesh configurations, container orchestration, and designing highly available system architectures.

Example scenarios:

• "How would you containerize a .NET Core backend service and set up a CI/CD pipeline to deploy it to a Linux-based production environment?"
• "Describe how you would use a message queue to decouple a data ingestion service from a heavy transaction processing engine."

As a Software Engineer at TransCore, your day-to-day activities will revolve around building and maintaining high-reliability software systems. You will be actively involved in the entire software development lifecycle, from initial system design to post-deployment support.

Your primary focus will be designing and developing backend applications that process data from tolling equipment. You will write clean, maintainable C# code, build robust APIs, and ensure your services run efficiently in Linux environments. Collaborative participation in daily Scrum meetings is expected, where you will provide progress updates, discuss technical roadblocks, and align on sprint goals.

Additionally, you will play an active role in system installations and support. This includes troubleshooting customer-reported bugs, writing comprehensive unit tests to prevent regressions, and thoroughly documenting your code and system architectures to assist operations teams.

To be competitive for a Software Engineer position at TransCore, you must demonstrate a strong balance of technical expertise and practical problem-solving skills.

• Must-have skills – A Bachelor's degree in Computer Science or a related engineering field (or equivalent experience), along with 3+ years of professional software development experience. You must possess advanced proficiency in C#, .NET Core, and relational databases (SQL Server/MySQL), as well as hands-on experience building multi-threaded applications deployed on Linux systems.
• Nice-to-have skills – Experience with Docker or other containerization technologies, familiarity with message queues, and exposure to CI/CD pipelines. Experience with web or desktop application development and familiarity with modern practices like prompt engineering are also highly valued.
• Soft skills – Strong analytical thinking, excellent written and verbal communication, and the ability to maintain professionalism and collaborate effectively in fast-paced, multi-disciplinary team environments.