Peak6 Investments-posted 22 days ago
Full-time • Intern
Hybrid • Austin, TX
1,001-5,000 employees
Securities, Commodity Contracts, and Other Financial Investments and Related Activities

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. Apex engineering teams are charged with building the services our clients love and are at the heart of our future product innovations. Apex has begun its transformation from on-premise infrastructure to the Cloud (GCP & AWS), and our team is responsible for transforming our products into the next generation clearing platform that will lead our industry for years to come. We are in need of smart, developers to build out our cloud-native (GCP/AWS), event-driven (Apache Kafka), Microservices framework. Have you been waiting on the opportunity to gain hands-on experience in the fintech industry? Now's your chance.

  • Assist in the development, testing, and maintenance of cash management applications including ACH transfers, wire processing, and cash journal systems
  • Collaborate with the Cash engineering team to design new features for money movement platforms and cash settlement workflows
  • Participate in code reviews and provide constructive feedback to peers working on financial services infrastructure
  • Help troubleshoot, debug, and resolve software defects in cash transfer systems and payment processing pipelines
  • Contribute to documentation of cash management processes, API specifications, and system architecture
  • Work with modern technologies including Java and Python in a Bazel-managed monorepo environment
  • Assist with testing and validation of financial transactions to ensure accuracy and compliance
  • Stay updated with emerging technologies and industry best practices in fintech and payment systems
  • Currently pursuing or recently completed a degree in Computer Science, Software Engineering, or a related STEM field.
  • Senior standing, May 2026 graduate
  • Strong analytical and problem-solving skills.
  • Currently pursuing a degree in Computer Science, Software Engineering, or related field
  • Strong programming fundamentals in one or more languages (Go, Java, Python preferred)
  • Interest in financial technology and payment systems
  • Detail-oriented approach suitable for working with financial data
  • Collaborative mindset and eagerness to learn in a fast-paced environment
  • Have a real passion for software engineering, as demonstrated by previous internships, work experience, projects, or publications
  • Either previous knowledge in financial markets or a strong interest in learning
  • 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.
  • As a hybrid workforce, we offer our employees the ability to work remotely up to two days a week.
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