Senior Full Stack Engineer, Ecommerce

Northwind Robotics , a leading financial technology company in the United States, is seeking to hire a Senior Full Stack Engineer, Ecommerce to join our team. Northwind Robotics is a financial technology company serving agencies delegated responsibility to manage public funds. Agencies use Northwind Robotics to get public funds to the right people, and ensure the funds are used for the right purpose. Northwind Robotics ’s suite of products and services empowers agency administrators to dramatically increase efficiency of funds distribution and spend compliance, reduce programmatic costs, maximize the full potential impact of the program, and satisfy the needs and expectations of policymakers, constituents and public reporting. Northwind Robotics has processed over $3.5 Billion to date and serves public agencies across 33 states. The Company has developed an industry-defining digital wallet solution which has gained rapid traction among state and local agencies and school districts across America. Northwind Robotics ranks as the 61st fastest growing software company on the prestigious Inc. 5000 list of fastest-growing private companies and the 21st fastest growing financial technology company on the Deloitte Technology Fast 500 in 2023. While the Company delivers immense business value, the social impact of Northwind Robotics is a fabric that runs through its mission and corporate culture. As a result of Northwind Robotics ’s innovation, public programs run with exponentially more efficiency and the impact and breadth of the programs for the individuals they serve is dramatically higher. This mission compliments the Company mission-based culture with focus on gratitude and work-life balance. About the Role As a Senior Software Engineer, you will be a core contributor on an engineering team led by our Technical Lead. You’ll own significant features end to end, help shape system architecture, and set the bar for code quality across the team. This is a hands-on individual contributor role: you’ll spend the majority of your time building, reviewing, and improving high-performing software. While you won’t have direct reports, you’ll be expected to raise the team’s technical level through strong code reviews, thoughtful design input, and informal mentorship of less-experienced engineers. Requirements Education Bachelor’s degree in Computer Science, Software Engineering, Information Technology, or a related technical field (or equivalent combination of education and hands-on practical experience). Overall Experience 5+ years of progressive software engineering experience across the full software development life cycle (SDLC). Demonstrated ability to operate with a high degree of autonomy: scoping and breaking down complex work, driving features to completion, and unblocking yourself and others. Experience mentoring or guiding other engineers through code reviews, pairing, and technical discussion (formal management experience is not required). Domain Experience 2+ years of direct experience building, scaling, or maintaining e-commerce platforms, multi-vendor marketplaces, or high-volume transactional SaaS applications. Working understanding of domain-specific challenges, such as shopping cart state management, payment gateway integrations, inventory synchronization, and secure user data handling. Hands-on experience integrating PunchOut catalogs with third-party procurement and ERP systems (e.g., SAP Ariba, Coupa, Jaggaer, Oracle Procurement), including the end-to-end punchout session and cart round-trip. Technical Experience 4+ years of full-stack development experience heavily focused on the JavaScript/TypeScript ecosystem. Strong hands-on experience designing and building scalable backend services and RESTful/GraphQL APIs using Node.js and Nest.js. Solid experience developing responsive and high-performance frontends using React and Next.js. Practical experience with database design and management, including a working knowledge of both NoSQL (MongoDB for dynamic catalogs/profiles) and relational (MySQL for strict financial/order ledgers) databases. Familiarity with e-procurement integration standards and protocols — cXML PunchOut (PunchOutSetupRequest/Response, PunchOutOrderMessage) and/or OCI — along with purchase order and invoice document exchange (e.g., cXML OrderRequest, InvoiceDetailRequest). Preferred Qualifications Advanced E-commerce Expertise : Prior experience with high-growth e-commerce or multi-vendor marketplace platforms, specifically addressing challenges such as multi-currency transactions, global logistics, or complex vendor payout structures. Security & Compliance Awareness : Familiarity with industry-standard compliance frameworks and security protocols, such as SOC 2, NIST, or PCI-DSS, and experience applying these controls within a cloud-native software development lifecycle. PunchOut & Procurement Integration Depth : Proven experience building and maintaining PunchOut catalog connections at scale — including Level 1 and Level 2 PunchOut, hosted