Senior Software Engineer, remote

Kenyan Edu; Austin, Northern (TX, KY); Hybrid; USD 135,000 - 195,000; Full time

Benefits offered by this job

Retirement plan

PTO

Job summary

Edfinity is seeking an experienced full-stack engineer to join a fully remote team focused on AI-powered courseware for higher-ed STEM. You will work on Rails, React, and data infrastructure, with emphasis on reliability and scalability across a distributed US-based team.

Ideal candidates have deep Rails experience, strong CS fundamentals, and comfort collaborating across product and engineering in an SDLC shaped by AI agents. Authorization to work in the United States is required.

Qualifications

• 8–15 years building and running scalable production web apps.
• Deep experience with Rails.
• Experience with React front-ends.
• Recent work in an SDLC guided by AI agents.
• Strong CS fundamentals in systems, data modeling and complexity.
• Excellent communication and self-direction.

Responsibilities

• Full-stack product development in areas like assessment authoring, delivery, and grading.
• LLM-powered features, from prompt architecture to auto-grading to eval infrastructure.
• Performance optimization and reliability refactoring to handle day-to-day load and high-stakes spikes.
• Stewardship of a mature codebase: upgrades, migrations, and paying down technical debt methodically.
• Part-time technical support rotation. Customer happiness is extremely important to us.

Skills

Rails

React

AI in SDLC

CS fundamentals

Communication

Job description

Headquarters: Austin, TX

URL: https://edfinity.com

About Edfinity Edfinity is the category leader in courseware and assessment technology for higher-ed STEM. We're NSF-supported, bootstrapped, and built by a close-knit remote team of senior engineers. We're growing fast and leading the field in AI-powered courseware that moves the needle on educator productivity and student outcomes. Your work will reach hundreds of institutions, and you will help decide how it gets built.

How we work

We're fully remote, with team members distributed across the US, and with that comes personal flexibility and accountability.

AI agents produce most of our code. We move fast, but we temper velocity with quality and stability above all else.

Engineers frame the problems, direct the work, and are accountable for everything that ships. If you already work this way and have opinions about it, you'll feel at home.

Everyone has opportunities to work across different areas of the platform, and team members are expected to develop deep technical expertise over time. This is particularly important as we step away from hands-on coding.

We're a small team of collaborative senior engineers. Your opinion matters.

The pace of change is real. More than ever, we're continually evolving our tooling and workflows as LLMs become more capable.

What you’ll be doing

• Our stack is Ruby on Rails, MongoDB, Elasticearch, ClickHouse, Redis/Sidekiq, and React.
• Full-stack product development in areas like assessment authoring, delivery, and grading; educator and student-facing features; LMS integrations
• LLM-powered features, from prompt architecture to auto-grading to eval infrastructure
• Performance optimization and reliability refactoring to handle both day-to-day load and high-stakes spikes
• Stewardship of a mature codebase: upgrades, migrations, and paying down technical debt methodically
• Part-time technical support rotation. Customer happiness is extremely important to us.

What you'll need

• 8-15 years building and running scalable production web applications and services
• Deep experience with Rails
• Experience with web front-ends such as React
• Recent experience in an SDLC revolving around the use of AI agents
• Strong CS fundamentals in systems, data modeling, and complexity
• Excellent communication hygiene, collaborative skills, and strong sense of self-direction.
• Interest in a long-term seat on a close-knit team.
• Authorization to work in the United States. We are not able to sponsor or transfer work visas at this time.

Compensation

$135,000-$195,000, plus eligibility for an annual discretionary bonus, retirement plan, and PTO