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// POSTED: Apr 15, 2026

**Senior Software Engineer – Customer Data Platform at arenaflex**

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Join the forefront of innovation in the financial services industry as a Senior Software Engineer at arenaflex. We're a pioneering company harnessing bleeding-edge technology to empower financial institutions to work smarter and serve better. Our products are powering millions of interactions every month for over a hundred unique financial institutions, and we're just getting started. As a Senior Software Engineer on our Customer Data Platform team, you'll have the opportunity to shape the future of financial services by designing and developing cutting-edge solutions that drive business growth and customer satisfaction. With a focus on verticalized AI, we're committed to staying two steps ahead of the curve, embracing innovation from the collective industry, and bringing the best solutions into production, now. **About arenaflex** arenaflex is a hybrid workforce with employees located across the United States & Canada, and our home base located in Boston, MA. We're a small and mighty team that prides ourselves in a tasteful balance between voracity and disciplined craftsmanship. We value those who embrace ambiguity, leverage their curiosity and passion to push the boundaries of their knowledge, and build exceptional products. **Our Tech Stack** Our tech stack is a combination of TypeScript (node.js and React) and Python, hosted in a scalable and distributed multi-cluster Kubernetes environment. We don't expect everyone to have prior experience in all of our tools, but we expect fundamental competency and intellectual curiosity. **Key Responsibilities** As a Senior Software Engineer on our Customer Data Platform team, you'll be responsible for: * **Pioneering Integrations**: Design and develop integrations with new core banking systems of record, ensuring seamless data exchange and minimizing manual effort. * **API Wrapper Optimization**: Optimize our API wrapper to route traffic, orchestrate reads and writes to core banking systems of record, and maintain a strong API boundary (abstraction layer). * **Monitoring and Alerting**: Implement monitoring, alerting, and anomaly detection to better respond to operational incidents and ensure high system availability. * **Automation and Optimization**: Implement automations and optimizations to reduce repetitive manual effort, including boilerplate generation and configuration intake. * **Low-Latency Configuration Database**: Contribute to our low-latency and up-to-date configuration database that defines client-specific setup, shared by our entire platform. * **Code Quality and Best Practices**: Write code that is easy-to-understand, ready-for-change, and safe-from-bugs, and drive engineering best practices, including code reviews and testing methodologies. * **Team Leadership**: Guide engineers, fostering a culture of excellence and continuous learning, and drive engineering best practices. * **Collaboration**: Collaborate with other engineering teams, product managers, designers, and UX researchers to deliver high-quality solutions. **Essential Qualifications** * **4+ years of experience** in full-stack development with a focus on backend systems, proficient in TypeScript. * **2+ years of experience** leading projects and mentoring engineers. * **Familiarity with SOAP/XML and/or core banking systems of record** is a plus. * **Architectural Expertise**: Skilled in designing scalable, robust systems and anticipating implementation challenges. * **Database Proficient**: Experience with relational databases like PostgreSQL or MySQL. * **Passionate about delivering high-quality, user-centric solutions** with a "get things done" attitude. * **Comfortable navigating ambiguity and adapting to change**. * **Excellent communication skills** and a team player who positively influences others. * **Committed to writing code that is easy-to-understand, ready-for-change, and safe-from-bugs**. * **Hands-on experience building high-performing, scalable architectures** – not just theoretical knowledge. * **Continuous Learner**: Eager to stay ahead of technology trends and enhance both technical and leadership skills. **Preferred Qualifications** * **Experience with GraphQL, REST, Websockets, and event-driven Pub/Sub**. * **Familiarity with proprietary NLP/ML shared utility services & models**. * **Experience with proprietary RAG ingestion pipeline and search algorithm**. * **Knowledge of Google Cloud, GitLab / CI, and Frontier LLM providers – OpenAI and Google**. **What We Offer** * **Competitive salary and benefits package**. * **Opportunity to work on cutting-edge projects** that drive business growth and customer satisfaction. * **Collaborative and dynamic work environment** with a small and mighty team. * **Professional development and growth opportunities** to enhance your technical and leadership skills. * **Flexible work arrangements**, including remote work options. * **Comprehensive training and onboarding program** to ensure your success. **How to Apply** If you're eager to join a company that's actively drafting the history books on the most seismic shift of FI strategy, we'd love to hear from you! Apply now to become a part of our innovative team at arenaflex.
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