Top Tech Jobs & Startup Jobs in NYC, NY

Build and operate secure, scalable backend services for OnePay’s co-branded credit card product. Design APIs and event-driven systems, integrate partner platforms, ensure regulatory and security compliance, and own reliability for real-time credit transactions. Collaborate with risk, compliance, and platform teams, make architecture decisions, mentor engineers, and improve code quality, testing, and operational practices.

Build and scale full-stack financial product experiences for OnePay’s employer benefits platform. Lead technical design, establish architectural and coding standards, optimize systems for reliability, security, performance, and scalability, and make technical decisions balancing rapid delivery with sustainable solutions. Collaborate with product, design, and operations to deliver features across web, iOS, and Android using distributed systems, APIs, and modern frontend technologies.

Own OnePay’s consumer communications and new media program by building relationships with reporters, podcasters, Substackers, live show hosts, and creators. Pitch and secure media placements, manage inbound opportunities, develop partnerships, prepare messaging, monitor coverage and sentiment, and collaborate with legal and compliance in a regulated fintech environment. The role also represents OnePay in interviews and appearances.

Research and prototype transformer-based and graph-based foundation models using customer, transaction, and merchant data. The intern will design and train models, run rigorous experiments, evaluate results, and develop working prototypes. Responsibilities include collaborating with Product, Engineering, Analytics, and Applied Science teams to improve customer experience, operational efficiency, and business outcomes.

Builds production-ready design and interface components in code, bridging design and engineering across React Native, React, and mobile and web platforms. Uses AI coding tools such as Cursor, Claude Code, and v0 at high production velocity. Defines design-to-code workflows, design tokens, component architecture, and improved handoff practices while collaborating closely with designers and engineers in a fast-moving environment.

As a Forward Deployed Engineer, you will develop AI agents and automation workflows, collaborate with teams, and ensure secure, reliable solutions integrating with various systems.

Build and maintain resilient backend services and APIs for fraud detection, identity verification, and transaction monitoring. Integrate third-party risk/compliance platforms, partner with product and engineering teams, contribute to architecture decisions, and produce documentation to ensure secure, reliable systems at scale.

Design and productionize machine learning, deep learning, LLM, personalization, recommendation, search, and retrieval systems. Collaborate with product, engineering, and analytics teams to deploy AI solutions that improve customer experiences, business growth, and operational efficiency. The role requires driving projects from ideation through deployment and delivering measurable business impact in a fast-moving fintech environment.

Develops partnership-led product expansion strategy, evaluates build-versus-partner opportunities, conducts market and partner analysis, presents recommendations to leadership, represents OnePay externally, and leads partner selection and commercial contract negotiations through execution.

Leads budgeting, forecasting, expense management, variance analysis, financial reporting, and sophisticated modeling. Partners with business teams and senior leadership, including the CFO, to improve financial performance and support strategic planning. The role also drives finance process improvements, AI integration, data integrity, and operational efficiency across corporate finance activities.