Senior .Net Developer

Apex Systems; Austin (TX); Hybrid; USD 143,270,000 - 171,924,000; Full time

Job summary

Everforth Apex is seeking a Senior .NET/C# Developer to serve as hands-on lead on an Authentication platform. You will design, develop, and support high-availability systems in an Agile team environment, delivering software through QA, UAT, and Production phases.

The role emphasizes leadership, feature design, story decomposition, and mentoring of junior engineers, with a strong focus on code quality and automated testing. Onsite in Austin, TX.

Qualifications

• 7+ years of hands-on application programming in an Agile environment
• 3+ years of leadership delivering technical innovations across teams
• Experience with C# and .NET server-side development
• Experience with IAM systems and authentication/identity platforms

Responsibilities

• Lead the development and delivery of software through QA, UAT, and Production
• Collaborate with product owners, stakeholders, QA, and operations to ensure on-time delivery
• Provide sizing estimates with Scrum Master and product owner
• Work on story decomposition, feature design and task prioritization
• Utilize automated testing tools and TDD methodologies
• Support Identity and credential management systems for Authentication
• Mentor team members and remove roadblocks with Scrum Master
• Coordinate team deliverables for successful releases
• Identify risks and implement mitigations
• Review code quality and drive design improvements

Skills

C# / .NET development

API development

Leadership

Agile / Lean

Test Driven Development

Mentoring juniors

Education

Bachelor’s or Master’s degree in computer science or related field

Tools

Bitbucket

Jira

Git

CI/CD

MongoDB

Aerospike

Kerberos / certificate-based auth

Google Cloud Platform

SOAP

Job description

# Senior .Net DeveloperApply**Job#: 3052639****Job Description:**Senior .Net Developer**Location:** Austin, Texas (Onsite)Role OverviewWe are seeking a Senior .NET/C# Developer to serve as a hands-on lead in a dynamic, fast-paced, and Agile environment. This role is part of a team responsible for designing, developing, and supporting a mission-critical Authentication platform. The responsibilities are divided between design and development, requiring contributions as both a coder and system designer. This position collaborates with a team of experienced engineers focused on the Agile development life cycle and ensuring on-time, high-quality software releases.Key Responsibilities* Lead the development and delivery of organizational software products through QA, UAT, and Production phases.* Collaborate with product owners and key stakeholders across Project Management, Business, QA, and Technology Operations to ensure projects are delivered on schedule.* Partner with the Scrum Master and product owner to provide development sizing and cost analysis estimates.* Work alongside the product owner and team members on story decomposition, feature design, and task prioritization.* Utilize automated testing tools and frameworks, including test-driven development, to uphold software quality standards.* Support Identity and credential management systems for Authentication.* Help resolve needs and remove roadblocks identified by team members in collaboration with the Scrum Master.* Coordinate individual team deliverables to facilitate successful product releases.* Identify technology risks and implement mitigation strategies.* Conduct regular reviews and code quality improvement sessions with developers, emphasizing requirements specification and design methodologies.* Prototype, validate, and develop tailored application solutions to address business requirements.Required Qualifications**Education:** A bachelor’s or master’s degree in computer science or a related technical field is required.**Experience:** Applicants must have over 7 years of hands-on application programming or test automation framework experience within an Agile development environment. This includes at least 3 years of demonstrated leadership in delivering and driving the adoption of technical innovations across teams.**Technical Skills:*** Demonstrated expertise in developing server-side applications (API Subject Matter Expert) utilizing C# and .NET technologies.* Experience designing and implementing solutions for applications requiring high availability, throughput, and scalability.* Knowledge of contemporary system architecture as well as development standards and guidelines.* Background in AI development and Specification-Driven Development.* Experience working with Identity and Access Management (IAM) systems.* Familiarity with Agile/Lean development and testing methodologies, including Test Driven Development, Continuous Integration, and Continuous Delivery.* Proficient with source control systems and Agile tools including Bitbucket, Jira, and Git.* Experience with CI/CD environments, including creating, modifying, and executing jobs from scratch using Git.* Expertise in troubleshooting production issues through analysis of logs, dashboards, and metrics.Preferred Qualifications* Experience working with databases such as MongoDB and Aerospike.* Knowledge of authentication protocols such as Kerberos and certificate-based authentication.* Skilled in testing RESTful web services using test automation frameworks; capable of parsing nested JSON and XML. Experience with SOAP is advantageous.* Experience with Google Cloud Platform.* Previous experience within the financial services or brokerage industry.* Proven ability to perform effectively under pressure in challenging environments.* Proven ability to mentor and provide guidance to junior team members. *Everforth Apex is a world-class IT services company that serves thousands of clients across the globe. When you join Everforth Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRateds Best of Staffing in Talent Satisfaction in the United States and Great Place to Work in the United Kingdom and Mexico.**Everforth Apex uses a virtual recruiter as part of the application process. Click here for more details. By applying for this job, you agree to receive calls, AI-generated calls, text messages, or emails from Everforth Apex and its affiliates, and contracted partners. Frequency varies for text messages. Message and data rates may apply. Carriers are not liable for delayed or undelivered messages. You can reply STOP to cancel and HELP for help. You can access our privacy policy at https://www.apexsystems.com/privacy-policy**Everforth Apex Benefits Overview: Everforth Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Everforth Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Everforth Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Everforth Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our ‘Welcome Packet’ as well, which an Everforth Apex team member can provide.**Everforth Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Everforth Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law.**If you require an accommodation under the Americans with Disabilities Act to participate in an interview with a virtual recruiter or to use our website for a search or application, please contact our Benefits Department at [e-mail] or 804-523-8228. Please note that this contact information is strictly to be used for medical ADA accommodations and that no other inquiries will be answered.**UnitedHealthcare creates and publishes the Transparency in Coverage Machine-Readable Files on behalf of Everforth Apex Systems.***Employee Type:** Contract**Location:** Austin, TX, US**Job Type:****Date Posted:** September 17, 2026**Pay Range:** $50 - $60 per hour