Sr Software Engineer

Apex Fintech Solutions • New York, NY

112d • $149,600 - $187,000

About The Position

Apex Fintech Solutions is looking for an experienced Senior Software Engineer with a strong focus on backend systems to join our Trade Execution team. This role is critical in designing, building, and maintaining scalable backend systems that power our multi-asset trading platform that US markets. This position is ideal for engineers passionate about backend development, tackling complex problems, and building systems that scale efficiently.

Requirements

• Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related discipline—or equivalent experience.
• 5+ years of professional experience developing backend systems.
• Backend development expertise with proficiency in a modern programming language (e.g., C++, C#, Python, Java, Go, etc.).
• Strong experience with SQL databases, including query optimization, indexing, schema design, and troubleshooting.
• Fundamental understanding of C++ and/or C# concepts, with a commitment to learning and utilizing these languages in the near term.
• Solid knowledge of system architecture, backend design patterns, and scalable infrastructure.
• Experience and knowledge of Linux, socket programming, concurrency and lock free data structures.
• Strong debugging and troubleshooting skills for application and system-level issues.
• Familiarity with version control systems (Git) and CI/CD pipelines in backend workflows.

Nice To Haves

• Familiarity with C++ or C# via personal or professional projects.
• Experience with kernel bypass networking.
• Experience building microservices or working with distributed systems.
• Experience building/maintaining backend trading execution systems.
• Exposure to Agile methodologies or iterative development practices.

Responsibilities

• Design, build, and maintain scalable backend systems for a multi-asset trading platform.
• Develop backend solutions using modern programming languages.
• Optimize SQL databases, including query optimization, indexing, and schema design.
• Integrate and develop APIs for efficient data flows.
• Collaborate with cross-functional teams to solve complex problems.

Benefits

• Healthcare benefits (medical, dental and vision, EAP)
• Competitive PTO
• 401k match
• Parental leave
• HSA contribution match
• Paid subscription to the Calm app
• Generous external learning and tuition reimbursement benefits

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: Bachelor's degree