Backend Engineer

All staffing and recruiting services for this engagement are provided directly by Oxenham Group; unsolicited candidate submissions, proposals, or partnership inquiries from third-party recruiting vendors or agencies will not be considered, accepted, or compensated, and this policy is applied consistently in accordance with EEOC and DOL equal employment opportunity and fair hiring standards. Our client is a next-gen trading app and registered investment advisor (RIA) making professional-style investing accessible to everyone. Backed by notable venture investors, the company is ranked among the Top 30 Most Downloaded Finance Apps and is quickly becoming a leader in fintech. They are seeking an experienced Backend Engineer to join as an early engineer, working closely with founders and cross-functional teams to build scalable systems and shape the future of investing. This is a hands-on, highly impactful role in a fast-paced, engineering- and product-focused environment. Responsibilities Design, build, and maintain robust backend systems that power the trading platform and integrate with major U.S. brokerages Lead development of the pilot portal, enabling seamless user interactions for data input, persistence, and broker integration Reverse-engineer undocumented APIs and implement distributed systems that scale with company growth Collaborate with frontend engineers, product managers, and cross-functional teams to deliver high-quality, user-centric solutions Drive impact in a hands-on capacity, directly contributing to a rapidly growing and innovative company Skills/Requirements 5-7+ years of professional experience as a backend engineer, ideally in a fast-paced startup environment Proficiency in TypeScript for backend development (open to other languages) Experience with Google Cloud Platform (GCP) or similar cloud infrastructure Expertise in distributed systems, API integration, and cloud-hosted applications Proven track record of building and scaling backend systems to support rapid growth Previous experience as a software engineer for trading, investing, or fintech platforms (nice-to-have) Previous experience working in a hyper-growth startup (nice-to-have) Experience with integrations involving platforms like Robinhood, Stripe, Plaid, or similar (nice-to-have) Familiarity with node.js, GraphQL, Nest.js, GCP, Google Pub/Sub, PostgreSQL, or similar stack (nice-to-have) Benefits Generous, unlimited PTO Two-week company-wide holiday shutdown at year-end plus standard company holidays 100% premium coverage for employee and dependent health, dental, and vision benefits Gym membership Top-of-the-line equipment (laptops, external monitors, standing desks, etc.)