Staff Fullstack Engineer

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Staff Fullstack Engineer based in United States. This is a staff-level individual contributor opportunity within an AI-native fintech SaaS environment focused on modern financial planning and analysis solutions. You will work closely with technical leadership to shape platform architecture, product direction, and engineering practices from an early stage. The role offers significant ownership across the full technology stack, from system design through implementation, testing, deployment, and operation. You will build scalable, reliable features while helping establish engineering standards that support long-term growth. Collaboration with product, design, operations, executives, and fellow engineers will be central to your impact. This is an ideal opportunity for an experienced engineer who wants to remain deeply technical while influencing architecture, mentoring peers, and raising the effectiveness of the broader engineering organization.