Software Engineering Intern - Margins

Apex Fintech Solutions • Austin, TX

3d • Hybrid

About The Position

Apex Fintech Solutions (Apex) powers innovation and the future of digital wealth management by building tech-forward solutions that help simplify, automate, and facilitate access to financial markets for all. Our robust suite of fintech software enables us to support clients such as Stash, Betterment, SoFi, Webull, and eToro, amongst many others; collectively, Apex powers access to the stock market for over 22+ million end customers. At Apex, we are changing how the securities industry operates by reinventing the status quo, which was manual, slow, and accessible only by the ultra-wealthy. We're digitizing and democratizing systems so that everyone has an opportunity to invest. When you're at Apex, you drive this change. You're part of a global team with a clear vision: to be the trusted technology that powers the digital economy. Our offices in Austin, Dallas, Chicago, New York, Portland, Belfast, and Manila are home to over 1,000 employees. Together, we’re shaping the future of financial innovation. Embrace change. Solve big. Win together. And be G.R.E.A.T. — grit, results, empathy, accountability, and teamwork — with Apex. We’re proud to be recognized for the innovative work we do, the purpose-driven nature of our work, and the collaborative culture we’ve created. Here are just a few of the many awards we’ve recently received: Best Places to Work 2026, 2025, 2024, 2023 - Presented by BuiltIn WealthTech of the Year 2025 - Presented by US FinTech Awards The World’s Top 250 Fintech Companies 2024 - Presented by CNBC ABOUT THIS ROLE Apex Fintech Solutions is looking for a Software Engineering Intern with unbounded potential for a development team on the front lines of Apex's high-volume, high-availability trade clearing suite. We partner with some of the industry's hottest next-generation stock trading products. You'll be at the center of rapidly scaling services that will test your limits. This role offers a hands-on opportunity to contribute to the ongoing development of the Margins system, a critical part of the Apex Ascend platform. You'll collaborate with experienced engineers to add new features and enhance support for this system while gaining valuable real-world experience with modern technologies and building scalable and reliable software solutions. You will assist in developing secure and reliable gRPC and REST APIs for system integrations and learn to work with relational databases like PostgreSQL for efficient data storage and querying. The ideal candidate should have the ability to write code in Java/Python or demonstrate a strong willingness to learn Have you been waiting on the opportunity to gain hands-on experience in the fintech industry? Now's your chance.

Requirements

• Currently pursuing a BA, BS, MS, PhD degree in Computer Science, Engineering or related technology field
• Experience with SQL & Java
• 0 - 2+ years of experience as a software developer or similar job roles.
• Ability to learn new technologies (languages, tools, frameworks) quickly.
• Excellent verbal and written communication skills.

Nice To Haves

• Financial services background is a plus.
• Have a real passion for software engineering, as demonstrated by previous internships, work experience, projects, or publications
• Familiarity with application of common design patterns
• Interested in backed or full stack software development
• Either previous knowledge in financial markets or a strong interest in learning

Responsibilities

• Design, develop, test, deploy, maintain and improve software.
• Learn from and apply design techniques and coding standards coached by our Senior Engineers.
• Build resilient, self-scaling, self-healing services that allow you to sleep through the night.
• Support the production systems that you build. This includes build, deployment (CI/CD), and monitoring (Grafana, Prometheus, PagerDuty).
• Writing high-quality, well-tested code.
• Maintaining high code-quality standards across your team via code reviews.

Benefits

• We offer a robust package of employee perks and benefits, including healthcare benefits (medical, dental and vision, EAP), competitive PTO, 401k match, parental leave, and HSA contribution match.
• We also provide our employees with a paid subscription to the Calm app and offer generous external learning and tuition reimbursement benefits.
• At AFS, we offer a hybrid work schedule for most roles that allows employees to have the flexibility of working from home and one of our primary offices.

What This Job Offers

• Career Level: Intern