.net/C# Developer - Senior

Apex Systems, LLC; Austin (TX); Hybrid; USD 69,000 - 90,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

401K match

HSA

EAP

Certification discounts

Training resources

Job summary

Everforth Apex in Austin, TX seeks a Senior .NET/C# Developer to design and deliver scalable, cloud-native solutions in a high-volume financial domain. You will apply AI-assisted development practices and modern event-driven architectures with .NET, Kafka, and containerized deployments.

The role requires 5+ years of professional software engineering, experience with GCP/AWS, Docker/Kubernetes, and hands-on AI/ML work.

Qualifications

• 5+ years of software engineering in .NET/cloud/web services.
• 4+ years building cloud-native apps with GCP/AWS and containers.
• 2+ years with databases (NoSQL/relational) and AI/ML concepts.
• 1+ years with AI-assisted engineering practices and GenAI tooling.

Responsibilities

• Design and implement scalable, resilient .NET services and APIs.
• Work with Kafka and cloud-native patterns for event-driven apps.
• Collaborate with architects and teams to deliver high-quality solutions.
• Apply GenAI coding assistants across the SDLC and drive code quality.

Skills

.NET

Kafka

AI/ML concepts

Event-driven architecture

CI/CD

Education

Bachelor’s degree in Computer Science or related field

Tools

Docker

Kubernetes

Cloud platforms (GCP/AWS)

IBM MQ

Splunk

JSON/XML

Jira

Confluence

Job description

# .net/C# Developer - SeniorApply**Job#: 3054073****Job Description:**.net/C# Developer - Senior**Location:** Austin, Texas (Onsite)**Alternate Location:** Southlake, TXRole OverviewAs a .NET Developer with AI experience, you will contribute to AI-assisted workflows across the System Development Life Cycle. You will work with .NET engineering, event-driven architecture, cloud-native platforms, and Generative AI-assisted delivery to build reliable business solutions within a complex financial domain.Key Responsibilities* Contribute to the design and implementation of scalable, resilient, and event-driven applications using .NET, Kafka, and cloud-native architecture patterns.* Build and modernize high-volume services, APIs, and distributed application capabilities that support reliable transaction processing and business-critical workflows.* Partner with architects, product owners, developers, and adjacent technology teams to convert business capabilities into high-quality technical solutions.* Use GenAI coding assistants to accelerate implementation, refactoring, unit testing, regression support, code reviews, scripting, automation, troubleshooting, and documentation.* Use agentic workflows, prompt engineering, custom instructions, and spec-driven development practices to improve productivity.* Strengthen engineering quality through automated testing, code reviews, performance analysis, observability, and resiliency practices.* Support modernization initiatives by moving legacy capabilities toward distributed .NET services, cloud-native platforms, and modern data stores.* Collaborate with engineers in a team-oriented environment and help adopt repeatable, responsible AI-assisted development practices.Required Qualifications**Education:** Bachelor’s degree in Computer Science, Software Engineering, or a related technical field, or equivalent practical experience.**Experience:*** 5+ years of professional software engineering experience developing scalable .NET, cloud-based, or web services applications in high-volume environments.* 4+ years of experience building and deploying cloud-native applications using GCP, Docker, Kubernetes, microservices, and CI/CD practices.* 2+ years of experience working with databases such as MongoDB, Aerospike, PostgreSQL, or comparable relational and NoSQL platforms.* 1+ years of hands-on experience with AI/ML implementation, production deployment, or AI-assisted engineering practices.* Experience owning technical components or features and collaborating within a software delivery team.* Experience contributing to IT transformation or system modernization initiatives.**Technical Skills:*** Hands-on experience with .NET and Kafka, with knowledge of distributed systems, stream processing, and performance optimization.* Working experience with IBM MQ, Splunk, JSON/XML, caching, performance analysis, and Twelve-Factor App methodology.* Experience with cloud platforms such as PCF, AWS, or GCP.* Hands-on experience or practical exposure to Large Language Models such as GPT, Claude, Gemini, or PaLM.* Experience using GenAI coding assistants (e.g., GitHub Copilot, Claude Code) across the SDLC.* Working knowledge of agentic workflows, spec-driven development, custom instructions, and prompt engineering.* Knowledge of Agile methodology and experience with tools like Jira and Confluence.**Other Qualifications:*** Understanding of broker-dealer domain capabilities and operations is required; experience in the financial services industry is preferred.* Effective communication and collaboration skills.* A collaborative mindset and a bias for action to drive outcomes.Preferred Qualifications* Master’s degree in Information Technology, Computer Science, Software Engineering, Artificial Intelligence, or a related field, or equivalent practical experience.* Experience in Test-Driven Development (TDD), Behavior-Driven Development (BDD), and QA automation.* Proficiency in creating architecture diagrams, design documentation, and technical specifications.* Experience with performance engineering, reliability testing, and operational readiness for high-volume distributed platforms.* Exposure to AI-assisted SDLC transformation initiatives or internal developer productivity programs.* Experience supporting or mentoring peers on .NET engineering practices or responsible AI-assisted software delivery. *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 29, 2026**Pay Range:** $50 - $65 per hour