Senior Software Engineer - Backend

ABOUT SORIS We are a stealth technology company building at the intersection of foundational AI and systems design for real-world impact. Our mission is bold: to reimagine one of the largest and most entrenched industries on the planet, creating an entirely new model that is faster, fairer, and fundamentally better for humanity. Unlike wrapper companies or point solutions, we are building a full-stack AI platform from the ground up; one that is agentic, vertically integrated, and designed for scale. This gives us the rare ability to solve problems others can’t touch, operating with orders-of-magnitude more efficiency than legacy systems. Our founding team has scaled category-defining companies in frontier tech, aerospace, mobility, and AI. We’ve led organizations from zero to multibillion-dollar valuations, pioneered new industries, and built products that reshaped how people live and move. Now we’re assembling a small, fiercely talented team to take on our most ambitious challenge yet. Joining us means working on cutting-edge research with direct application, where your code doesn’t sit in a lab, it changes lives. You’ll be part of an environment that values intellectual rigor, creative rebellion, and the courage to build what others say is impossible. This is a once-in-a-generation opportunity to help design and deploy the infrastructure of the future. We’ve raised capital in record time, and are scaling our foundational team now. If you’re motivated by hard problems, high impact, and the chance to leave a legacy, we’d love to talk. THE ROLE We’re looking for a Senior Software Engineer with frontend engineering expertise to join our Engineering team. You’ll work alongside the CTO and other engineers to build Soris’ first MVP. This is a ground-floor opportunity where your work will directly shape the platform, culture, and impact of Soris. Candidates with a good fit for this role: * Are fluent in TypeScript/JavaScript, React, and modern web tooling * Have extensive experience building web applications end-to-end * Want to ship fast, iterate, and own outcomes. * Thrive in ambiguity, asking questions and solving problems across the stack. * Believe in building systems that are secure, transparent, and human-friendly. WHAT YOU’LL DO * Build and maintain scalable web applications using JavaScript/TypeScript, React, and related technologies. * Create reusable UI components that will be present in all Soris applications. * Ensure a positive user experience for all types of users, with accessibility in mind. * Work closely with designers to translate high-fidelity designs into polished user-interfaces. * Design and build core AI systems that solve real-world problems. REQUIREMENTS * 5+ years of experience building production web applications. * Fluency in TypeScript/JavaScript, React, and modern web technologies. * Experience with state management (Redux, MobX, Recoil, or similar) * Familiarity with Restful APIs and GraphQL * Proficiency in testing frameworks (JEST, React Testing Library, or Cypress) * Knowledge of build tools (Webpack, Vite, Babel) NICE-TO-HAVES * Exposure to design systems (Figma) * Familiarity with frontend observability (Sentry, Datadog) ENGINEERING CULTURE AT SORIS Our values guide how we work: * Extreme Ownership: We own outcomes, not just code. At Soris, we never say “that’s not my job”. * Always Be Curious: Ask questions. Explore new ways. * Go Farther Together: Collaboration beats silos. WHY JOIN US? * Competitive compensation package, including salary and equity. * Benefits include employer-covered health insurance for you, your spouse, and partially for children * Be part of an engineering team with massive influence on product, culture, and direction. * Work with cutting-edge AI agents and modern tech stacks. APPLY If you’re excited about transforming big antiquated industries, shipping fast, and working with a driven, world-class team, then we’d love to hear from you!

WHO WE ARE ABOUT STRIPE Stripe is a financial infrastructure platform for businesses. Millions of companies—from the world's largest enterprises to the most ambitious startups—use Stripe to accept payments, grow their revenue, and accelerate new business opportunities. Our mission is to increase the GDP of the internet, and we have a staggering amount of work ahead. That means you have an unprecedented opportunity to put the global economy within everyone's reach while doing the most important work of your career. ABOUT THE TEAM Specialist Solutions Architects (SSA) are domain experts aligned to specific Stripe solutions and customer buying centers. We have in-depth knowledge of specific solution offerings and understanding of customers' challenges. We advise the broader pre-sales team on complex opportunities, support pipeline development and revenue attainment, serve as an advisor on go-to-market sales plays, and provide critical insights to our product and engineering teams. Stripe Radar is Stripe's fully integrated fraud and risk management platform. The Radar team's mission is to evolve from a best-in-class payment fraud product into a unified risk intelligence platform that protects businesses from all forms of financial loss—from sophisticated payment fraud and account takeovers to first-party misuse and policy abuse. With Radar, businesses can confidently navigate the evolving fraud landscape, accept more good revenue, and focus on growth. WHAT YOU'LL DO You'll collaborate closely with sales and pre-sales teams to drive pipeline and revenue targets, while also educating the product and engineering teams on market trends and influencing the product roadmap. You'll develop deep relationships with senior customer business leaders and grow Stripe's solution offerings with new and existing customers. As subject matter experts, you'll scale the broader organization by creating reusable assets and coaching others on complex high-value opportunities. You'll also run customer workshops and take the lead on key opportunities. You'll serve as the domain and product expert to our users and GTM team for Stripe Radar globally. RESPONSIBILITIES • Act as a subject matter expert on Stripe's Radar product suite to accelerate opportunities globally. • Demonstrate a deep understanding and point of view on trends in the fraud and risk management ecosystem, including AI-powered detection, processor-agnostic architectures, and the shift from payment fraud to holistic business risk (e.g., policy abuse, account takeover, first-party misuse). • Develop expertise with the functional and architectural patterns for deploying advanced fraud systems, including the lifecycle of rule management, ML model tuning, and manual review optimization. • Understand the ecosystem of risk and identity integrations (e.g., device fingerprinting, identity verification, bot mitigation, case management) Stripe must support for our users to be successful. • Define, share, and learn best practices and reusable assets with the broader GTM organization to enhance the quality and efficiency of the team. • Create reference architectures to uplevel the team and refine reference solutions based on product enhancements and feedback from customers. • Partner closely with the Radar product sales team and be an active part of the opportunity team for Stripe's largest and most complex Radar customers to lead strategy and own key customer relationships. • Partner closely with the Radar product team to get early exposure to the new products and features. • Serve as a "Voice of the Customer" internally to drive product and feature request prioritization, providing actionable insights on the competitive landscape and emerging fraud vectors. • Act as an escalation point to drive our most complex technical issues to resolution with Stripe's engineering team. • Support customers and Stripe teammates on account or deal strategy, and answer product feature and technical questions. • Understand the sales process for the product and provide the Sales team with tools and training to qualify potential leads. • Stay current on competitive analysis and market differentiation. • Support marketing events including executive briefings, conferences, user groups, and trade shows. MINIMUM REQUIREMENTS • 7+ years of experience in a pre-sales, technical consulting, product, or risk strategy role focused on e-commerce fraud prevention, risk management, or trust and safety • Deep working knowledge of the fraud and risk ecosystem, including payment fraud (CNP), account takeover (ATO), first-party misuse (friendly fraud), and policy and content abuse • Demonstrated knowledge of risk management architectures, including the role of rules engines, machine learning models, and manual review queues in fraud decisioning • Strong knowledge of the signals and data used in fraud detection, such as device and IP data, behavioral biometrics, identity verification, and graph-based analysis • Strong knowledge of software engineering and architecture patterns, with the ability to understand how a wide variety of technologies and systems interact with each other • Outstanding communication, presentation, and interpersonal skills, comfortable explaining complex concepts to both technical and non-technical audiences • Interest in solving open-ended business problems with a combination of technology and creative thinking • A proven ability to build strong collaborative working relationships with business partners • Ability to deal effectively with ambiguity and thrive in an unstructured, fast-moving environment PREFERRED QUALIFICATIONS • Experience integrating Stripe or other RESTful APIs into web applications • Experience with processor-agnostic fraud solutions and multi-processor payment environments • Experience with risk management for various business models, such as platforms and marketplaces, subscription services, and digital goods and SaaS • Familiarity with liability shift programs (e.g., chargeback guarantees) and value-based pricing models for risk products • Understanding of how to extend fraud protection beyond payments to other products like payouts (Issuing), physical payments (Terminal), or recurring billing (Billing) • Experience as a subject matter expert in a relevant industry, vertical, or product