Senior Backend Engineer jobs in United States
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Suppli · 5 hours ago

Senior Backend Engineer

Suppli is a company focused on transforming the distribution industry through innovative payment solutions. They are seeking a Senior Backend Engineer to architect and build systems that process millions of transactions daily and integrate with complex ERP systems.

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H1B Sponsor Likelynote

Responsibilities

High-volume payment processing systems and secure financial APIs
Deep integrations with major ERPs (NetSuite, Sage, Acumatica, etc.)
LLM-powered workflows (credit decisions, remittance matching, automated comms)
Real-time data pipelines handling millions of financial records
AR / collections automation that directly impacts customer cash flow

Qualification

Ruby on RailsPostgreSQLREST/JSON APIsETL systemsAI integrationTeam collaborationProblem-solvingOwnership mentality

Required

4+ years of backend experience with strong system design chops
Expert-level Ruby on Rails (Rails 7+, Ruby 3+) — our core backend is modern Rails and you'll own huge parts of it from day one → Exceptional candidates with deep experience in Django, Laravel, Spring Boot, or similar who are excited to go all-in on Rails will be considered
Advanced PostgreSQL (query optimization, large datasets, logical replication, etc.)
Proven ability to design clean, versioned REST/JSON APIs
Experience shipping and operating ETL/background-job heavy systems in production

Preferred

Built or maintained third-party integrations with enterprise software
Real fintech, payments, or billing experience (Stripe, ACH, lockbox, etc.)
Hands-on LLM integration or prompt engineering (bonus if you've shipped it to production)
Previously worked at a Series A–C startup and loved the chaos

Company

Suppli

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Suppli is a software company that turns receivables into cash for distributors and suppliers.

H1B Sponsorship

Suppli has a track record of offering H1B sponsorships. Please note that this does not guarantee sponsorship for this specific role. Below presents additional info for your reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (1)

Funding

Current Stage
Early Stage
Total Funding
$3.1M
Key Investors
Equal Ventures
2023-01-26Seed· $3.1M

Leadership Team

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Ryan Ayers
Co-Founder
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Thanasis Skafidas
Co-Founder
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Company data provided by crunchbase