Senior Software Engineer

APEX Fintech Services • Austin, TX

13d • Hybrid

About The Position

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 seeking an experienced Senior Software Engineer to contribute to the ongoing evolution of its cutting-edge Margin product—a critical component of the Apex Ascend platform. This role focuses on designing and delivering key features for real-time buying power calculations along with building highly scalable applications and services. As a Senior Engineer, you will thrive in a fast-paced environment where you will leverage modern cloud-native solutions, contribute to the development of robust backend systems, and work closely with cross-functional teams to influence technology solutions.

Requirements

• BA, BS, MS, PhD in Computer Science, Engineering or related technology field (or equivalent work experience) required
• 5+ years of professional experience in backend software development, with a proven focus on designing, implementing, and maintaining distributed systems and microservices.
• Demonstrated experience guiding projects, working cross-functionally, and mentoring junior engineers, while actively contributing to a collaborative team culture.
• Solid understanding of financial systems, risk modeling, and regulatory compliance to deliver secure and reliable solutions.
• Proficiency in building fault-tolerant systems and high-availability, real-time data processing services.
• Expertise in backend performance tuning and ensuring system scalability and reliability.
• Hands-on experience with DevOps practices, including CI/CD pipelines and deployment automation.
• Deep understanding of securing APIs, backend systems, and cloud-based infrastructures.

Nice To Haves

• Certifications in Java, Kubernetes, or cloud platforms (e.g., Google Cloud) preferred

Responsibilities

• Backend Development: Design, develop, deploy, and maintain high-performance backend systems using Java to enhance the functionality and scalability of the Margin product.
• Microservices Engineering: Build and manage containerized microservices using Kubernetes and Docker, ensuring optimal scalability, reliability, and performance.
• Cloud-Native Applications: Develop and optimize infrastructure leveraging Google Cloud Platform and associated technologies such as Google Pub/Sub.
• Distributed Systems: Focus on creating scalable, event-driven systems employing Kafka, RabbitMQ, Redis, and PostgreSQL.
• API Development: Design robust, secure, and efficient gRPC and REST APIs for internal and external system interactions.
• Data Engineering: Design, maintain, and optimize relational databases, with a focus on PostgreSQL/AlloyDB, to ensure efficient data storage, retrieval, and transactional operations within Java-based backend systems
• Performance Optimization: Tackle complex technical challenges by optimizing system performance, availability, scalability, and maintainability.
• Collaboration & Communication: Collaborate effectively with globally distributed teams, translating technical topics for non-technical stakeholders and aligning architecture strategies across teams.
• Mentorship and Knowledge Sharing: Support junior engineers through mentoring, technical guidance, and sharing best practices to enrich team expertise and project outcomes.
• System Design & Architecture: Contribute to key architectural decisions to ensure solutions are scalable, secure, and well-integrated across multiple teams and systems.

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

• Job Type: Full-time
• Career Level: Mid Level
• Number of Employees: 1,001-5,000 employees