# Senior Software Engineer
**Company:** [Checkr](https://hotfix.jobs/companies/checkr)
**Location:** San Francisco, CA
**Salary:** $185K-$218K
**Experience:** 6+ years
**Skills:** Ruby on Rails, JavaScript, React, APIs, Event-Based Architecture, Container Orchestration, Observability Tooling, Scraping Technology, Data Analysis
**Posted:** 2026-02-27
> Senior Full Stack Engineer building scalable APIs and end-to-end applications for risk insights in Checkr Trust. Requires 6+ years experience with Ruby/Rails, JavaScript/React, startup background, and BS/MS degree.
## Job Description
## What you'll do:
- Work closely with customers, engineers, and leaders to design, build, and launch new products.
- Take full ownership of the entire process of developing end-to-end applications – from shaping the idea to delivering the finished application.
- Build and improve APIs, including integrating with third-party services to expand what our products can do.
- Embrace a customer-centric, product-first approach – partner directly with customer success, customers and stakeholders to better understand their needs and turn those into useful features.
- Keep code reliable and easy to maintain with solid testing, thoughtful reviews, and good practices.
- Run and measure product experiments, using what you learn to guide future development.
- Building scalable APIs and asynchronous event-based architecture that can reliably handle very high traffic.

## What you bring:
- BS/MS degree in either computer science or an engineering discipline.
- Have founded or held early roles at successful fast-paced startups.
- 6+ years of full stack software development experience.
- Advanced knowledge in Ruby (Rails), Javascript (React), or similar languages/frameworks.
- Experimentation mindset: autonomy and empowerment to validate a customer need, get team buy-in, and ship a rapid MVP.
- Early-stage approach: comfort with ambiguity, balancing speed and perfection, and the confidence and curiosity to help guide product direction.
- An A-player mindset with a strong bias for action: you raise the bar, move with urgency, stay resilient through ambiguity, and take ownership to deliver meaningful outcomes.

## Nice to have:
- Experience building scalable technical architecture that can scale to 10mm+ users (including observability tooling, container orchestration, etc.).
- Background in trust & safety, IDV, background check products or criminal data.
- Expertise in data analysis and processing.
- Experience building and working with scrapers and scraping technology.

## What you get:
- A fast-paced and collaborative environment.
- Learning and development allowance.
- Competitive compensation and opportunity for advancement.
- 100% medical, dental, and vision coverage.
- Up to 25K reimbursement for fertility, adoption, and parental planning services.
- Flexible PTO policy.
- Monthly wellness stipend.
- Working at a startup within a startup.
**Apply:** https://hotfix.jobs/jobs/senior-software-engineer-at-checkr-0ee64a78-7d90-47f4-9ca5-0c51264ab52a
**Canonical:** https://hotfix.jobs/jobs/senior-software-engineer-at-checkr-0ee64a78-7d90-47f4-9ca5-0c51264ab52a