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Senior Rails Engineer - Product (Hybrid)

Enova · Chicago, IL · $98,000–$130,000 a year · Tech

Posted Sep 22, 2026 · We last checked this listing on Oct 6, 2026

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Likely interview questions for this role

Written from this job description, not a generic list. Each one notes what the interviewer is really checking.

About your past

Tell me about a production issue you debugged under pressure. How did you find the root cause?

What they are checking: Calm, methodical production debugging, which the posting lists as a senior responsibility.

Tell me about a time you worked with Analytics or Operations to deliver something. What did you learn from them?

What they are checking: Cross-functional partnership, which the posting emphasizes for delivering business value.

What would you do

There are three reasonable ways to solve a problem. How do you pick one and get the team behind it?

What they are checking: Weighing tradeoffs and driving alignment, which the posting says seniors are expected to do.

How do you mentor a junior developer who keeps shipping code that works but is hard to maintain?

What they are checking: Coaching skill and the ability to raise quality without discouraging people.

Product wants a feature shipped fast, but you see a risk in how it handles customer data. What do you do?

What they are checking: Risk management and pushback in a regulated lending business without blocking progress unnecessarily.

About the work

Walk me through how you would design a microservice that handles loan applications for a consumer product.

What they are checking: System design skill grounded in the kind of business problems Enova's product teams solve.

How do you design Sidekiq jobs so they are safe to retry and do not double-process work?

What they are checking: Idempotency and reliability in asynchronous jobs, which the posting calls out directly.

How do you use AI agent harnesses and write skills for them in your daily work?

What they are checking: Real hands-on experience with AI coding tools, which the posting lists as a requirement.

What do you watch out for in a Rails codebase as it grows large?

What they are checking: Rails depth and awareness of common scaling and maintainability problems.

How do you design a database schema change for a large table without downtime?

What they are checking: Safe migration practices in a production system serving customers.

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The full job description

As published by Enova.

We are interested in every qualified candidate who is eligible to work in the United States. However, we are not able to sponsor visas or take over sponsorship at this time. Responsibilities : As a Senior Software Engineer on our Product Consumer team, you’ll be designing and implementing technical solutions to business problems. You’ll collaborate with other engineers to build the best systems for the problem at hand, learning from Lead Engineers and Architects, while mentoring junior developers. Most problems have multiple solutions and we need your expertise to figure out which one is best and drive to completion. In addition, you will work with Product Management, Analytics, and Operations to deliver business value.   Our most successful Senior Engineers are able to tackle a variety of tasks from designing microservices, operational issues, production debugging, risk mitigation and management, and the ability to pair with others outside of your immediate team in order to accomplish any task.   Requirements: • 4+ years of experience with any programming language we welcome engineers from various technical backgrounds. Ideally we prefer 2+ years of Rails experience. • Comfortable with AI agent harnesses and writing skills. • Proficiency in one or more object-oriented programming languages. • Experience developing and maintaining asynchronous jobs and task queues (Sidekiq or similar frameworks)  • The ability to solve problems in more than one language, and know exactly why one of them is better • Expertise with building software features, enterprise architecture, and API integration to facilitate first in class software. • Project management skills, specifically the ability to oversee projects end-to-end, estimate work, and break up problems into deliverable parts  • Deployed multiple web applications from a full-stack perspective. • Experience collaborating with product managers to plan and scope products iteratively. • A Bachelor’s degree in Computer Science, Engineering, or equivalent experience Nice to have: • Deployed software using Ruby, Rails, Go, or PostgreSQL • Experience in the Finance domain is a nice-to-have • Aspiration to grow into a people leadership role through mentoring teammates, driving team initiatives, and shaping priorities. Compensation: This position includes various levels within our career ladder. The actual annual salary will be determined based on qualifications, skills, experience, and level assessed during the hiring process and may fall outside of the ranges shown.  Budgeted annual salary ranges: Senior Software Engineer I: $98,000-$130,000 Senior Software Engineer II: $108,000 to $140,000 Additional compensation for this role may include a bonus. All full-time employees are eligible to participate in Company benefits, described in more detail  here . Benefits & Perks: • Our hybrid roles require in-office work Tuesday through Thursday, with remote flexibility on Mondays and Fridays. This schedule fosters collaboration, team connection, and strategic planning, enhancing communication and effectiveness to drive results. • Health, dental, and vision insurance including mental health benefits • 401(k) matching plus a roth option (U.S. Based employees only) • PTO & paid holidays off • Sabbatical program (for eligible roles) • Summer hours (for eligible roles) • Paid parental leave • DEI groups (B.L.A.C.K. @ Enova, HOLA @ Enova, Women @ Enova, Pride @ Enova, South Asians @ Enova, APEX @ Enova, and Parents @ Enova) • Employee recognition and rewards program • Charitable matching and a paid volunteer day…Plus so much more! About Enova Enova International is a leading financial technology company that provides online financial services through our AI and machine learning-powered Colossus™platform. We serve non-prime consumers and businesses alike, while offering world-class technology and services to traditional banks—in order to create accessible credit for millions.   Being a values-driven organization is at the core of Enova’s success. We live our values by listening to our customers, challenging assumptions, thinking big, setting high expectations, and hiring and developing the best. Through our values and our commitment to making Enova an awesome place to work, we maintain an environment of inclusion and culture where our employees can thrive. You can learn more about Enova’s values and culture here .  It is our policy to provide equal employment opportunity for all persons and not discriminate in employment decisions by placing the most qualified person in each job, without regard to any other classification protected by federal, state, or local law. California Applicants: Click here to review our California Privacy Policy for Job Applicants.

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