Senior Software Developer - Tolling and Revenue Systems

Arcadis is the world's leading company delivering sustainable design, engineering, and consultancy solutions for natural and built assets.

We are more than 34,000 people, in over 30 countries, dedicated to improving quality of life. Everyone has an important role to play. With the power of many curious minds, together we can solve the world’s most complex challenges and deliver more impact together.

Role description:

We need an experienced senior developer to play a critical role in delivering world-class tolling and revenue systems. This is a hands-on role with real technical influence: you will own significant features end to end, shape design decisions on systems that handle money and regulated data, and

set the standard for how the team writes and reviews code. Because these systems are revenue-critical and run continuously, we need someone who will see a problem through to resolution in production.

We are equally interested in how you work: pragmatic about tools and process, willing to make the call on what fits the problem in front of you, and able to raise the capability of the people around you rather than just your own throughput.

Role accountabilities:

What You'll Be Working On

• Feature-driven development within a distributed team of developers, testers, business analysts, and project managers.

• Design, development, testing, and maintenance of secure services and applications across the tolling stack — roadside and lane software, back-office transaction and account processing, and customer-facing web and mobile channels.

• Interfaces to external systems — payment and financial processors, CRM platforms, IVR and contact centre systems, interoperability hubs, registry lookups, and third-party violation and collection services.

• Software deployment and support of production systems for various clients around the world.

• Peer review of solution designs, architectures, and code, and hands-on support when production issues arise.

Software Development

• Provide senior-level, full-stack development across front end, back end, and database, with emphasis on systems design in a revenue-critical environment.

• Build and extend back-office capability: transaction and trip processing, account and customer management, fare and toll rate configuration, money handling and settlement, video and image auditing, and violation processing.

• Develop and maintain customer-facing web portals and mobile applications, and the APIs behind them.

• Integrate with roadside and lane systems, automated payment machines, and customer display devices, working with the roadside team on interface definition and troubleshooting.

• Define automated tests that prove the correctness of service logic, and optimize data storage and retrieval against SQL Server and Oracle databases.

• Identify and mitigate security risks, participate in security reviews and vulnerability remediation, and support compliance obligations that apply to payment and personal data.

• Support delivery and operations teams through deployments, upgrades, and production incidents, and work with client technical staff during integration, testing, and acceptance.

• Make effective use of modern development tooling, including AI-assisted coding tools, with sound judgment about where they help and where they introduce risk.

Technical Leadership

• Provide technical direction to other developers, and aid decision making by evaluating options for best fit.

• Perform code reviews with constructive, specific feedback, advocating for best practices and consistency.

• Review and advise on effort estimates and client feature requests, and contribute to technology stack evaluations and architectural direction.

• Mentor developers, promote a culture of continuous learning and accountability, and drive improvement in quality and delivery efficiency.

Qualifications & Experience:

• Minimum seven years of professional software development experience.

• Deep practical knowledge of C# and .NET, including Web API.

• Experience with front-end technologies, particularly Angular and TypeScript.

• Strong relational database skills with SQL Server and/or Oracle, including query development, optimization, and support.

• Comfortable working with AI-assisted development tools such as GitHub Copilot as part of day-to-day delivery.

• Experience delivering and maintaining customer-facing production systems, with a track record of owning issues through to resolution.

• Understanding of distributed systems, application of software patterns and pros and cons of different architectural choices.

• Strong grasp of the full software development life cycle, including CI/CD, testing strategy, and deployment practices.

• Confident, clear communication with clients as well as colleagues.

• Bachelor's degree in Computer Science or a related field, or equivalent practical experience.

Nice to Have

• Experience with tolling, transit fare collection, payments, billing, or another revenue or transaction processing domain.

• Familiarity with payment processing, PCI DSS obligations, or financial reconciliation and settlement.

• Experience integrating with CRM platforms such as Dynamics 365, or with contact centre and IVR systems.

• Mobile development experience, or exposure to additional front-end frameworks such as React or Vue.js.

• Experience in a consulting or client-delivery setting, working across distributed international teams.

Why Arcadis?

We can only achieve our goals when everyone is empowered to be their best. We believe everyone's contribution matters. It’s why we are pioneering a skills-based approach, where you can harness your unique experience and expertise to carve your career path and maximize the impact we can make together.

You’ll do meaningful work, and no matter what role, you’ll be helping to deliver sustainable solutions for a more prosperous planet. Make your mark, on your career, your colleagues, your clients, your life and the world around you.

Together, we can create a lasting legacy.

Join Arcadis. Create a Legacy.

Our Commitment to Equality, Diversity, Inclusion & Belonging

We want you to be able to bring your best self to work every day which is why we take equality and inclusion seriously and hold ourselves to account for our actions. Our ambition is to be an employer of choice and provide a great place to work for all our people. We are an equal opportunity and affirmative action employer. Women, minorities, people with disabilities and veterans are strongly encouraged to apply. We are dedicated to a policy of non-discrimination in employment on any basis including race, creed, color, religion, national origin, sex, age, disability, marital status, sexual orientation, gender identity, citizenship status, disability, veteran status, or any other basis prohibited by law.