Senior Software Engineer (Trade Execution)

WHO WE ARE

Apex Fintech Solutions (AFS) powers innovation and the future of digital wealth management by processing millions of transactions daily, to simplify, automate, and facilitate access to financial markets for all. Our robust suite of fintech solutions enables us to support clients such as Stash, Betterment, SoFi, and Webull, and more than 20 million of our clients' customers. 

Collectively, AFS creates an environment in which companies with the biggest ideas in fintech are empowered to change the world. As a global organization, we have offices in Austin, Dallas, Chicago, New York, Portland, Belfast, and Manila.

If you are seeking a fast-paced and entrepreneurial environment where you'll have the opportunity to make an immediate impact, and you have the guts to change everything, this is the place for you. 

AFS has received a number of prestigious industry awards, including:

• 2021, 2020, 2019, and 2018 Best Wealth Management Company - presented by Fintech Breakthrough Awards

• 2021 Most Innovative Companies - presented by Fast Company

• 2021 Best API & Best Trading Technology - presented by Global Fintech Awards

ABOUT THIS ROLE

Apex Fintech Solutions is looking for an experienced Senior Software Engineer (Trade Execution) with a strong focus on backend systems to join our Trade Execution team. While prior experience with C++ or C# is not mandatory, candidates must demonstrate a willingness to learn and work with these languages in the near term. 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.

Duties/Responsibilities

• Design, develop, test, deploy, maintain, peer-review, and continuously tune high-performance, high-throughput software.

• Collaborate with other members of the team to share, learn, develop, and deliver designs and coding standards to meet the growing needs of the platform

• Build resilient, self-scaling, self-healing services that deliver the highest level of reliability.

• Support the production systems that you design. This includes building, deploying (CI/CD), and monitoring (DataDog, Grafana, Prometheus, PagerDuty).

• Write commercial grade, well-tested code, and maintain high code-quality standards across your team through code reviews and other best practices.

• Implement instrumentation to maintain observability to proactively visualize opportunities for improvement.

Education and/or Experience

• Bachelor’s in Computer Science, Software Engineering, or a related discipline (or equivalent work experience required)

• 5+ years of professional experience developing backend systems.  

• Strong experience with SQL databases, including query optimization, indexing, schema design, and troubleshooting.  

• Experience and knowledge of Linux, socket programming, concurrency and lock free data structures. 

• Experience integrating and developing APIs for efficient data flows.  

• Experience in execution management. 

• Experience with kernel bypass networking preferred.

• Experience building microservices or working with distributed systems preferred.

• Experience building/maintaining backend trading execution systems preferred.

• Exposure to Agile methodologies or iterative development practices preferred.

Required Skills/Abilities

• Backend development expertise with proficiency in a modern programming language (e.g., C++, C#, Python, Java, Go, etc.).  

• 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.  

• Strong debuggi