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Senior Software Engineer (Ruby/Rails), MVR
Checkr · San Francisco, California, United States
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What Checkr asks for
From Checkr's Senior Software Engineer (Ruby/Rails), MVR ad, checked 2 Nov 2026.
Backend systems and APIs
At least 5 years of experience developing scalable backend services, including working with relational databases, ORMs, and RESTful APIs.
Distributed systems
A history of designing and maintaining distributed systems, with hands-on work in microservices, CI/CD, and event-driven or asynchronous architectures.
Data integration and quality
Experience connecting to third-party APIs or external data providers and building resilient pipelines that manage incomplete or inconsistent data.
Technical leadership and mentoring
Leading the development lifecycle from design to release, setting technical direction, and mentoring other engineers to improve code quality and practices.
The ad asks for 5 or more years of backend experience. Based in San Francisco, with 3 or more days a week in the office.
How the example answers the ad
Distributed systems
“Implemented event-driven asynchronous processing using Kafka to handle 50k+ daily transaction events.”
Handling 50,000 plus daily transaction events with Kafka shows experience in event-driven and asynchronous architectures, which are key components of distributed systems.
Data integration and quality
“Built a resilient data pipeline to handle inconsistent payload schemas from external banking providers.”
Developing a pipeline specifically designed to manage inconsistent payload schemas from external providers shows experience with data integration and quality when dealing with third-party sources.
Technical leadership and mentoring
“Mentored four junior engineers through bi-weekly code reviews and structured technical training sessions.”
Guiding four junior engineers via bi-weekly code reviews and training sessions shows experience in the mentoring aspect of technical leadership and mentoring.
Backend systems and APIs
“Developed RESTful APIs supporting 200k+ concurrent active users in a high-growth environment.”
Building RESTful APIs for over 200,000 concurrent active users shows experience in developing scalable backend systems and APIs.
The whole example as text
Victor Nguyen · Senior Backend Engineer
Summary
Senior Backend Engineer with 6 years of experience building scalable Ruby on Rails systems and distributed architectures. Architects high-traffic microservices using PostgreSQL and Kafka to ensure system reliability and throughput. Integrates complex third-party fintech APIs to maintain resilient data pipelines for mission-critical reporting engines. Mentors junior developers to improve code quality and deployment velocity across engineering teams.
Experience
Senior Backend Engineer · Gusto
San Francisco, CA · 2024 - Present
- Architected a new microservices framework that increased system throughput by 40% for payroll processing.
- Optimized PostgreSQL queries to reduce latency from 200ms to 45ms across primary API endpoints.
- Implemented event-driven asynchronous processing using Kafka to handle 50k+ daily transaction events.
- Mentored four junior engineers through bi-weekly code reviews and structured technical training sessions.
- Managed the end-to-end release lifecycle of a core reporting engine serving 10,000+ business users.
Backend Engineer II · Stripe
South San Francisco, CA · 2022 - 2024
- Led the integration of three major fintech APIs which processed over $5M in monthly transaction volume.
- Built a resilient data pipeline to handle inconsistent payload schemas from external banking providers.
- Reduced system downtime by 15% through the implementation of automated canary deployments.
- Designed and maintained shared service libraries that improved team developer velocity by 25%.
- Refactored legacy Ruby on Rails codebase to improve maintainability and performance.
Backend Engineer · Coinbase
San Francisco, CA · 2021 - 2022
- Developed RESTful APIs supporting 200k+ concurrent active users in a high-growth environment.
- Enforced strict code quality standards by implementing comprehensive unit and integration testing suites.
- Collaborated with data science teams to optimize schema design for real-time asset tracking.
- Managed containerized services using Kubernetes and Docker to ensure 99.99% service availability.
- Contributed to the migration of monolith modules to a distributed microservices architecture.
Junior Backend Engineer · Twilio
San Francisco, CA · 2020 - 2021
- Assisted in the migration of database systems that improved retrieval performance by 30%.
- Documented API endpoints and internal system processes to improve team knowledge sharing.
- Resolved 50+ critical production bugs related to third-party data synchronization issues.
- Participated in agile ceremonies and cross-functional planning to align with product roadmaps.
- Supported the CI/CD pipeline improvements that cut deployment times from 45 to 15 minutes.
Education
Bachelor of Science in Computer Science · University of California, Berkeley
Berkeley, CA · 2016 - 2020
- Graduated with 3.8 GPA and Dean's List honors.
- Completed advanced coursework in distributed systems and database management.
- Authored capstone thesis on high-concurrency request processing optimization.
Minor in Statistics · San Francisco State University
San Francisco, CA · 2016 - 2020
- Analyzed large datasets using R and Python for predictive modeling projects.
- Earned honors for excellence in statistical computing research.
- Collaborated with local startups on data-driven revenue forecasting models.
Skills
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Frequently asked questions
Is the example from an employee?
No. It is an AI-written example for this ad, made to show how a resume can answer it.
Do I need to be in the office?
Yes. The role is based in a hub location such as San Francisco, and the ad states that staff are expected to work from the office 3 or more days a week.
Does Checkr use AI in its engineering workflow?
Yes. The company expects engineers to use AI tools, models, and assistants as a standard part of their work.
Where do I apply?
On the official Checkr posting, through the job link on this page.
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