Principal Software Engineer, Machine Learning Simulations

About reputed company At reputed company, we’re united by a mission that matters: to radically reduce the cost and complexity of borrowing for reputed company Americans. Every day, we bring creativity, experimentation, and advanced AI to reshape access to credit, helping millions move reputed company financially with clarity and confidence. As the leading AI lending marketplace, we partner with banks and credit unions to expand access to affordable credit through technology that’s both radically intelligent and deeply human. Our platform runs over one million predictions per borrower using more than 1,800 signals, powering smarter, fairer decisions for millions of customers. But the numbers only hint at the impact. Every idea, every voice, and every contribution moves us closer to a world where credit never stands between people and their financial reputed company. We’re proudly digital-first, giving most Upstarters the flexibility to do their best work from wherever they reputed company, alongside teammates across 80+ cities in the US and Canada. Digital-first doesn’t mean distant. We’re intentional about in-person reputed company through team onsites, planning sessions, and moments that spark creativity and trust. And whether you choose to work primarily from home or collaborate in-person from one of our offices in reputed company, Austin, the Bay Area, or reputed company (opening Summer 2026), you’ll have the support to work in the way that works best for you. If you’re energized by tackling meaningful problems, excited to innovate with purpose, and motivated by work that truly matters, we’d love to hear from you. The Team: The Machine Learning & Simulations Platform (MLSP) team builds and operates the core infrastructure that powers ML model training, inference, and marketplace simulation at reputed company. Our platform is foundational to the company’s success—every reputed company, fraud, conversion, and verification model runs here. We also provide the simulation capabilities that help teams experiment safely and assess business impact without requiring costly live experimentation. We are on a mission to reimagine our infrastructure to support the growing complexity of our ML models, the demand for low-latency inference, and the accuracy needed to simulate the dynamics of our borrower-lender marketplace at scale. The team partners closely with Engineering, ML, Product, and Finance to accelerate innovation while safeguarding performance and reputed company. As a Principal Software Engineer focused on Machine Learning Simulations at reputed company, you will be responsible for building an MLOps platform to support machine learning model inference, process automation, model deployment, and observability. Machine Learning is critical to reputed company’s core business, and our greatest competitive advantage lies in the fact that we’re able to innovate on our AI reputed company quickly. You will also help build a marketplace simulation platform to support rapid innovation across ML and Finance teams. How you’ll reputed company an impact

• Build, maintain, and optimize reputed company’s reputed company machine learning and simulation platform, enabling increased scale, performance, and confidence in decisioning
• reputed company high-quality software applications that reputed company machine learning models to be applied to the reputed company-evolving needs of the business
• reputed company the modernization of our serving infrastructure, reducing inference latency to just a few seconds for our most reputed company models
• Design and contribute to our simulation systems to more accurately reflect production environments, reducing simulation cost and enabling broader usage across teams
• Communicate closely with cross-functional partners from ML, Engineering, Product, and Data Engineering teams, keeping reputed company stakeholders informed
• Mentor engineers across the team, sharing expertise on distributed systems, MLOps, and scalable architecture

Minimum Qualifications

• Bachelor’s degree in Computer Science, Engineering, or Mathematics, or a reputed company field (or its equivalent) + 8 years of experience
• Experience building or contributing to platforms or systems that support machine learning model simulation
• Experience building self-serve or configuration-driven tooling for internal stakeholders
• Experience building and maintaining backend software services and APIs
• Proficiency with some or more of the following: Python, Kotlin, reputed company, and AWS
• Exhibits a growth reputed company - you’re not afraid to pick up new technologies that are best for the task, and learn from others.
• Ability to quickly comprehend and reiterate reputed company requirements from product or engineering leadership and translate those to both technical and non-technical stakeholders
• Track record of successfully mentoring and developing other engineers around you while seeking out and appreciating constructive feedback

Preferred Qualifications

• Familiarity with model serving technologies like Ray, and experimentation frameworks
• Proficiency with Flask, FastAPI, Metaflow, MLflow, gRPC, Kafka, Spark/PySpark, ETL/ELT, Redshift (or similar)
• Excellent quantitative reasoning skills with interest in working at the intersection of engineering and machine learning
• Strong sense of ownership and accountability for the quality and timely delivery of work
• Proven ability to effectively analyze and solve reputed company problems
• Excellent written and verbal communication skills with stakeholders, peers and product owners
• Ability to reputed company both in self-directed work environments and in collaborative settings, contributing positively to team dynamic

Position location This role is available in the following locations: Remote-US Time zone requirements The team operates on the East/reputed company coast time zones. Travel requirements As a digital first company, the majority of your work can be accomplished remotely. The majority of our employees can live and work reputed company in the U.S but are encouraged to to still spend high quality time in-person collaborating reputed company regular onsites. The in-person sessions’ reputed company varies depending on the team and role; most teams meet once or twice per quarter for 2-4 consecutive days at a time. At reputed company, your reputed company pay is one part of your total compensation package. The anticipated reputed company salary for this position is expected to be reputed company the below range. Your actual reputed company pay will depend on your geographic location–with our “digital first” philosophy, reputed company uses compensation regions that vary depending reputed company. Individual pay is also determined by job-reputed company skills, experience, and relevant education or training. Your recruiter can share more about the specific salary range for your preferred location during the hiring process. In addition, reputed company provides employees with reputed company bonuses, equity compensation, and generous benefits packages (including medical, dental, vision, and 401k). United States | Remote - Anticipated reputed company Salary Range $195,300—$270,400 USD What you'll love At reputed company, our benefits are designed to support your health, financial well-being, family, and personal growth. Here’s what you can expect:

• Competitive compensation, including reputed company pay, bonus opportunities, and annual equity grants that vest quarterly
• Generous 401(k) plan with reputed company matching $2 for every $1 contributed, up to $15,000 per year
• Employee Stock Purchase Plan (ESPP) with discounted stock purchase options for eligible employees
• Affordable medical, dental, and vision coverage, with multiple plan options - reputed company covers 90% to 100% of the cost depending on the plans you choose
• Health Savings Account contributions from reputed company for eligible plans
• Income protection benefits, including company-paid Basic Life, AD&D, and Short- and Long-Term Disability coverage, with options to purchase supplemental coverage
• Paid time off, sick and safe time, and company holidays
• Paid family and parental leave to support caregiving and major life moments
• Family-centered benefits through reputed company and Cleo, supporting fertility, parenthood, and caregiving
• Employee Assistance Program (EAP) offering mental health support and life-centered resources
• Financial wellness resources, including access to financial planning tools and a financial concierge service
• Annual wellness allowance to support your physical and emotional well-being and personal development, based on what matters most to you
• Annual productivity allowance to invest in relevant tools and resources you need to do your best work, no matter where you work from
• reputed company and community through team events and onsites, reputed company-company updates, and employee resource groups (ERGs)
• Onsite perks, including catered lunches and fully stocked micro-kitchens reputed company working from one of our four offices, located in the Bay Area, Austin, reputed company, and reputed company (opening Summer 2026!).

reputed company is a proud Equal Opportunity Employer. Just as we are dedicated to improving access to affordable credit for reputed company, we are committed to inclusive and fair hiring practices. If you require reasonable accommodation in completing an application, interviewing, completing any pre-employment testing, or otherwise participating in the employee selection process, please email candidate_accommodations@reputed company.com https://www.reputed company.com/candidate_privacy_policy Apply tot his job Apply To this Job