Senior Back End Engineer – Ruby on Rails, GO

PrizePicks

Senior Software Engineer fluent in Ruby on Rails and Go at PrizePicks. Building and scaling backend services for a leading Daily Fantasy Sports platform.

Posted 6/11/2026full-timeRemote • 🇺🇸 United StatesSenior💰 $175,000 - $185,000 per yearWebsite

Tech Stack

Tools & technologies

Distributed SystemsDockerGoGRPCKubernetesMicroservicesPostgresRubyRuby on Rails

About the role

Key responsibilities & impact

Build and own backend services: Design and implement features across both Rails-based services and Go microservices — from API contracts through deployment and monitoring.
Support the migration to microservices: Help decompose the Rails monolith into well-scoped, independently deployable services, contributing to architectural decisions about what to extract and how.
Power internal tooling APIs: Build and maintain the backend APIs that Back Office operators depend on for real-time decisioning — projection management, risk dashboards, alerting, and member operations.
Own technical delivery: Lead the design and implementation of complex features end-to-end, from product requirements through production deployment.
Drive system reliability: Diagnose and resolve performance bottlenecks, optimize database queries, and improve resilience of backend systems under load.
Define technical direction: Propose and drive architectural decisions for your team's services, evaluating tradeoffs and communicating recommendations clearly to engineers and stakeholders.
Mentor and elevate: Provide hands-on mentorship to Software Engineers I, II, and III through code reviews, pairing, and technical guidance.
Improve engineering practices: Advocate for and improve best practices around code quality, testing, observability, and deployment for the team.
Collaborate cross-functionally: Work closely with Product Managers, QA, and other engineering teams to translate operational goals into well-scoped technical solutions.
Participate in on-call rotation: Share responsibility for production incidents, contributing to root cause analysis and long-term reliability improvements.

Requirements

What you’ll need

5–8 years of professional software engineering experience, with meaningful production time in both Ruby on Rails and Go
Proven track record of owning and delivering complex, multi-component features in a team environment
Experience working across monolith-to-microservices migrations, extracting services, managing dual-write patterns, and maintaining backward compatibility
Experience designing and operating distributed systems or event-driven architectures
Strong Rails proficiency — you understand the framework deeply, write idiomatic Ruby, and know when to leverage or work around Rails conventions
Strong Go proficiency — you write idiomatic, well-tested, production-quality Go code
Solid PostgreSQL skills, including schema design, query optimization, and performance tuning
Solid understanding of API design (REST and/or gRPC) and service boundary design
Experience with asynchronous workflows — background job processing (Sidekiq or similar), message queues, or event streaming
Experience with containerization (Docker) and orchestration (Kubernetes)
Familiarity with CI/CD pipelines and deployment automation
Understanding of observability practices — logging, metrics, tracing

Benefits

Comp & perks

Company-subsidized medical, dental, & vision plans
401(k) plan with company match
Annual bonus
Flexible PTO to encourage a healthy work/life balance (2 weeks STRONGLY encouraged!)
Generous paid leave programs, including 16-week paid parental leave and disability benefits
Workplace flexibility and modern work schedules focused on getting the job done, not hours clocked
Company-wide in-person events and team outings
Lifestyle enhancement program
Company equipment provided (Windows & Mac options)
Annual performance reviews with opportunities for growth and career development

ATS Keywords

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Hard Skills & Tools

Ruby on RailsGoPostgreSQLAPI designRESTgRPCasynchronous workflowsDockerKubernetesevent-driven architectures

Soft Skills

mentorshipcollaborationcommunicationproblem-solvingleadershiptechnical guidancecode reviewsadvocacy for best practicescross-functional teamworkroot cause analysis