Software Engineer III

Overview

At HNTB, you can create a career that is meaningful to you while building communities that matter to all of us. For more than a century, we have delivered solutions for some of the largest, most complex infrastructure projects across the country.

• Lead the development of complex software components and features.
• Work with clients and stakeholders to define software solution strategy and architecture.
• Manage assigned tasks and contribute to defining scope, technical approach, and delivery plans.
• Ensure code quality, performance, and security through reviews, testing, and optimization.
• Provide technical guidance and mentorship to junior engineers.
• Collaborate with cross‑functional teams to integrate software into enterprise systems.
• Support the evolution of development practices and contribute to architectural decisions.
• Participate in Agile planning, estimation, and retrospectives.
• Perform other duties as assigned.

• Bachelor’s degree in computer science or related field and 5 years of relevant experience.
• Master’s degree in computer science or related field and 4 years of relevant experience.
• In lieu of education, 9 years of relevant experience.

• Strong knowledge of software architecture and design patterns.
• Experience with CI/CD, cloud platforms, and container orchestration.
• Advanced proficiency in modern programming languages and frameworks.
• Ability to lead technical discussions and mentor others.

• Experience designing solutions using AWS and MS Azure.
• Building APIs that allow backend communication with front end and third‑party services.
• Optimizing server and database architecture for performance and scalability.
• Proficiency in Python, C#, JavaScript/Node.js, and relational or No
  
  SQL databases.
• Experience developing and maintaining public‑facing SaaS applications.
• Experience integrating third‑party services and APIs.
• Implementation of secure application design practices, including PII data protection, role‑based access control, and identity management.
• Familiarity with public‑sector compliance frameworks (NIST, SOC, ISO).
• Knowledge of SSO integrations such as SAML and Entra .
• Strong experience building and supporting cloud‑native applications on AWS.
• Proficiency in AWS services: EC2, Lambda, ECS, S3, EBS, RDS, DynamoDB, VPC, and associated security groups.
• Deep understanding of the AWS Shared Responsibility Model and secure cloud design.
• Experience in authentication, authorization, encryption, and logging with tools like KMS, TLS, Cloud Trail, Cloud Watch, and Security Hub.
• Understanding of OAuth, OpenID, and other security frameworks.

Chicago, IL & Kansas City, MO

Illinois: $ - $
Nationwide: $95,991.51 - $

Visa sponsorship is not available for this position.

HNTB provides a fair and equal employment opportunity for all employees and applicants regardless of race, color, religion, sex, national origin, age, disability, pregnancy status, sexual orientation, gender identity, veteran status, genetic information, citizenship status, or other status protected by law. The HNTB Companies ensure nondiscrimination in all programs and activities in accordance with Title VII of the Civil Rights Act of 1964.