Design, build, and own Elixir backend systems used across onboarding, fraud detection, compliance, and operations with a direct impact on the experience of hundreds of thousands of clients
Build and maintain data pipelines, integrations, and analytics infrastructure for a rapidly growing team
Develop internal tools used daily by operations and compliance teams
Build and maintain training and inference infrastructure for machine learning models and contribute to models where appropriate
Productionize outputs from machine learning models, heuristics, and LLM-based systems
Partner closely with product management and operations to plan and scope new projects and initiatives
Write high-quality, tested code
Participate in code reviews
Take long-term ownership of critical systems as River scales

Requirements

6+ years of experience in software engineering
You have designed, built, and maintained production systems at scale and understand how to build reliable systems
You take ownership of systems and are comfortable solving ambiguous problems
You have experience working with data-heavy systems, pipelines, and complex integrations
You are familiar with machine learning systems and how models are trained, deployed, and used in production
You have strong judgment around correctness, reliability, and operational risk
You're excited about what we are building at River.

Benefits

Significant equity stock options
Medical, Dental and Vision Benefits
Unlimited PTO
Parental Leave separate from regular PTO policy
401k

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

Elixirdata pipelinesmachine learninganalytics infrastructureproduction systemscode qualitycode reviewssystem reliabilitycomplex integrationsmodel deployment

Soft Skills

ownershipproblem-solvingjudgmentcollaborationcommunication