# Senior Software Engineer, Backend
**Company:** [Hearth](https://hotfix.jobs/companies/hearth)
**Location:** New York, NY
**Salary:** $180K-$198K
**Experience:** 3+ years
**Skills:** Go, Ruby on Rails, Stripe, Twilio, AWS, API Design, Payment Processing, Microservices, Data Modeling, Rag Pipelines
**Posted:** 2026-06-10
> Backend engineer building Go microservices and migrating from Rails monolith to power AI workflows, payments, and integrations for 15k+ contractors. Requires 3+ years experience, Go or strong polyglot skills, and payments/integration experience.
## Job Description
## What You’ll Do
- Build and maintain APIs that serve 15,000+ active contractors for payments, onboarding, lead management, and AI-powered workflows
- Integrate with third-party services including payment processors, CRMs, communication platforms (Twilio), and other contractor-facing tools; ensure integrations are reliable and observable
- Contribute to the Rails → Go migration: move data models and business logic into Onikisu to expand the context available to our AI products
- Design data models that don’t become technical debt
- Debug production issues independently; find the root cause, fix it, and prevent recurrence
- Review code with a high bar and help teammates level up

## What We’re Looking For
- Go or strong polyglot depth (Go preferred; shipped and maintained Go services in production)
- API and integration experience with payment processors (Stripe, Braintree), CRMs, and communication platforms (Twilio, SendGrid)
- Payments mindset: correctness over cleverness
- Independent debugging skills
- Startup background with fast shipping experience
- Bonus: Rails codebase experience or familiarity with RAG pipelines and LLM-adjacent data architecture

## What We’re Not Looking For
- Someone who needs well-defined tickets before starting work
- Someone who treats code review as a formality
- Someone who escalates bugs to QA rather than debugging independently
- Primary experience in cloud infrastructure or DevOps (need product engineers who own features end to end)
- Someone who measures success by tickets closed rather than working systems
- Someone looking for a large company with narrow ownership

## Benefits
- Mission-driven, values-based culture
- Competitive pay
- Unmatched opportunities to learn and develop
- Generous PTO, plus paid company holidays
- Stock options
- Medical, dental, and vision options
- 401(k)
- Free Employee Assistance Program
- Parental Leave Program
- Pet Insurance
**Apply:** https://hotfix.jobs/jobs/senior-software-engineer-backend-at-hearth-c43523c2-6d20-4ad2-8148-d93914e1ec01
**Canonical:** https://hotfix.jobs/jobs/senior-software-engineer-backend-at-hearth-c43523c2-6d20-4ad2-8148-d93914e1ec01