Senior Software Engineer

Oxenham GroupSioux Falls, SD, United States

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Senior Software Engineer

We are seeking a Senior Software Engineer to join a dynamic engineering team focused on delivering high-quality software solutions in a fast-paced fintech environment. This hands-on role is ideal for someone who enjoys designing, building, and optimizing applications using modern technologies such as C#, PHP, Docker, MySQL, MSSQL, and AWS.

The ideal candidate brings extensive software development experience-preferably in the financial services sector-and will contribute to system architecture, mentor team members, and champion engineering best practices. Success in this role requires strong collaboration with cross-functional teams to deliver secure, scalable, and efficient technology that supports evolving business needs.

Key Responsibilities

Design, develop, and optimize high-performance financial applications using C# / .NET, PHP, and related technologies.
Collaborate with product managers and stakeholders to deliver scalable, cloud-native fintech solutions.
Conduct code reviews and uphold best practices in software development.
Manage and optimize relational databases (MySQL, MSSQL) to ensure performance and reliability.
Integrate third-party APIs and services to expand product capabilities.
Contribute to the architecture and design of mission-critical applications.
Troubleshoot and resolve technical and application-level issues.

Qualifications

Education & Experience

Bachelor's degree in Software Engineering, Computer Science, or a related field (Master's degree preferred).

8+ years of hands-on software development experience.

Strong expertise in C# / .NET and / or PHP.

Industry experience in fintech or financial services, with a solid understanding of security, compliance, and high-volume systems.

Proficiency with AWS, Docker, and relational databases (MySQL, MSSQL).

Experience with software architecture and API design.

Bonus Skills

Experience with Python, Symfony, or Object-Relational Mapping (ORM) tools.

Familiarity with Enterprise or Business Decision Management systems (EDM / BDM).

Additional Qualifications

Strong problem-solving and analytical abilities.

Excellent attention to detail and code quality.

Clear verbal and written communication skills.

Self-motivated and comfortable working both independently and collaboratively.

Passion for making a meaningful impact through technology.

Work Environment & Schedule

Standard office environment with routine use of computers and related equipment.

Primarily a sedentary role.

Full-time position, Monday through Friday, 8 : 00 a.m. to 5 : 00 p.m.

Occasional evening or weekend work may be required.

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Senior Software Engineer • Sioux Falls, SD, United States