Software Engineer III

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 been delivering solutions for some of the largest, most complex infrastructure projects across the country. With our historic growth, it is an exciting time to join our team of employee-owners.

This opportunity entails being responsible for contributing to the design and development of innovative software solutions for complex business needs. You will work with clients and stakeholders to help define software solution strategy and contribute to architectural decisions using advanced technologies. In this role, you will be responsible for managing assigned tasks, contributing to the definition of scope and technical approach, and ensuring quality and performance in solution delivery. You will also provide technical guidance to junior team members and support the evolution of development practices, positioning yourself for future leadership in enterprise software solution initiatives. This role bridges individual contribution and technical leadership, preparing you for senior-level responsibilities by expanding your influence across projects and teams.

What You’ll Do:

• Leads the development of complex software components and features.
• Works with clients and stakeholders to help define software solution strategy and architecture.
• Manages assigned tasks and contributes to defining scope, technical approach, and delivery plans.
• Ensures code quality, performance, and security through reviews, testing, and optimization.
• Provides technical guidance and mentorship to junior engineers.
• Collaborates with cross-functional teams to integrate software into enterprise systems.
• Supports the evolution of development practices and contributes to architectural decisions.
• Participates in Agile planning, estimation, and retrospectives.
• Performs other duties as assigned., HNTB will recruit, hire, train, and promote individuals in all job titles, and will ensure that all other personnel actions are administered, without regard to an individual’s protected veteran or disability status. All employment decisions will be based only on valid job requirements. In addition, employees and applicants shall not be subjected to harassment, intimidation, threats, coercion, or discrimination because they have engaged in or may engage in any of the following activities: (1) filing a complaint; (2) assisting or participating in an investigation, compliance evaluation, hearing, or any other activity related to the administration of any Federal, State, or local law requiring equal opportunity for protected veterans or individuals with disabilities; (3) opposing any act or practice made unlawful by Section 4212, Section 503, their implementing regulations, or any other Federal, State, or local law requiring equal opportunity for protected veterans or individuals with disabilities; or (4) exercising any other right protected by Section 4212, Section 503, or their implementing regulations.

The non-confidential portions of the affirmative action program for protected veterans and individuals with disabilities shall be available for inspection upon request by any employee or applicant for employment. These plans are available for review upon request during normal business hours. Any questions or requests to review should be directed to your Human Resources Partner.

As Chief Executive Officer, I fully support our affirmative action program and am committed to the implementation of the company’s affirmative action policy. I have delegated overall responsibility for this policy to the Business Integrity Director. The Manager of HR Compliance & Immigration is responsible for the implementation, auditing, and reporting of this policy and program, assisted by the office’s Human Resources Partner.

HNTB employees must comply with this policy and report any violations of illegal discrimination, as specified in the Integrity Reporting policy.

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

What You’ll Bring:

• 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.

What We Prefer:

• Experience designing solutions using various cloud platforms including AWS and MS Azure.
• Building Application Programming Interfaces (APIs) that allow the backend to communicate seamlessly with the front end (what the user sees) and third-party services.
• Performance & Scalability: Optimizing the server and database architecture to ensure the app runs fast, even during sudden spikes in traffic
• Languages & Frameworks: Python, C#, JavaScript/Node.js
• Databases : Experience with one or more databases such as (PostgreSQL, MSSQL, MongoDB, Redis, Oracle, NoSQL)
• Experience developing and maintaining public-facing SaaS applications supporting stakeholder engagement and data collection
• Experience in integrating third-party services and APIs (e.g., communication tools, data systems, GIS, outreach platforms)
• Experience implementing secure application design practices, including:
• PII data protection (masking, validation, controlled access)
• Role-based access control and identity management
• Familiarity with public-sector compliance frameworks (NIST, SOC, ISO)
• Understanding of SSO integrations (SAML, identity providers like Entra ID)
• Strong experience building and supporting cloud-native applications on AWS (multi-region architectures where applicable)
• Proficiency in AWS services such as:
• Compute (EC2, Lambda, container services ECS)
• Storage (S3, EBS)
• Databases (RDS, DynamoDB)
• Networking (VPC, subnets, security groups)
• Deep understanding of the AWS Shared Responsibility Model and secure cloud design
• Strong understanding of the web development lifecycle and programming techniques and tools.
• Excellent project and time management skills.
• Collaborating with the front-end developers and other team members to establish objectives and design more functional, cohesive codes to enhance the user experience.
• Knowledge or Experience implementing:
• Authentication (login), Authorization (permissions), Encryption, and Data Protection Protocols
• Identity and Access Management (IAM)
• Encryption (KMS, TLS in transit, encryption at rest)
• Logging and monitoring (CloudTrail, CloudWatch, Security Hub)
• Familiarity with cloud compliance and audit readiness (SOC 2, NIST controls)
• Understanding in Oauth, OpenID, Microsoft Identity, OpenIddict, or other security frameworks

The approximate pay range for Illinois is $105,590.66 - $165,154.61. Please note that the pay range provided is a good faith estimate for the position at the time of posting. Actual compensation will be dependent on factors, including but not limited to, the individual’s qualifications, experience, knowledge, skills, and abilities as well as physical work location within the state., The approximate nation wide pay range for this position is $95,991.51 - $187,675.71. Please note that the pay range provided is a good faith estimate for the position at the time of posting. Actual compensation will be dependent on factors, including but not limited to, the individual’s qualifications, experience, knowledge, skills, and abilities as well as physical work location.

Please note that The HNTB Companies will not accept any resume submitted via this email address. To properly submit your application to the HNTB Companies, and to ensure that our recruiters have immediate access to your resume/CV, please search our open positions online, and apply directly through our careers website.

Thank you for considering HNTB for your career opportunities.

Affirmative Action Policy Statement

HNTB has implemented the following policy as part of its longstanding commitment to compliance with all applicable affirmative action requirements. HNTB agrees to post in conspicuous places, available to employees and applicants for employment, this Affirmative Action Policy.

HNTB is a federal contractor subject to Section 4212 of the Vietnam Era Veterans’ Readjustment Assistance Act of 1974, as amended (“Section 4212”) and Section 503 of the Rehabilitation Act of 1973, as amended (“Section 503”). Accordingly, it is HNTB’s policy to take affirmative action to employ and advance in employment protected veterans (disabled veterans, recently separated veterans, Armed Forces Service Medal veterans, or active-duty wartime or campaign badge veterans) and individuals with disabilities at all levels of employment, including the executive level. HNTB also will provide reasonable accommodation to known physical or mental limitations of an otherwise qualified employee or applicant for employment with a disability, unless the accommodation would impose undue hardship on the operation of HNTB. In order to request a reasonable accommodation, employees should contact the HR Solutions Center at General Policy Inquiry - Employee Center and