Senior Software Engineer - Backend jobs in United States
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Retell AI · 2 weeks ago

Senior Software Engineer - Backend

positionSan Francisco Bay Area
timeFull-time
remoteOnsite
seniorityMid, Senior Level
money$215K/yr - $290K/yr
date2+ years exp

Retell AI is a fast-growing startup focused on revolutionizing call centers with advanced voice AI technology. The Senior Backend Engineer will be responsible for shaping the core systems that power millions of conversations, tackling challenges related to real-time audio and global telephony while collaborating closely with the founding team.

Artificial Intelligence (AI)AudioCall CenterGenerative AITelecommunications
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H1B Sponsorednote

Responsibilities

Build foundational architecture for Retell's platform, such as prompt orchestration, testing frameworks, observability dashboards, and telephony integrations
Design scalable backend systems and DevOps workflows for reliable performance across millions of calls
Lead complex projects from architecture to production, driving delivery and monitoring
Collaborate with product and design teams to create intuitive APIs and interfaces for quick customer onboarding
Support customer onboarding, troubleshoot issues, and turn feedback into product improvements

Qualification

Backend developmentScalable systemsDevOps workflowsConcurrencyDistributed componentsCommunicationCollaborationProblem-solving

Required

2+ years of backend development experience and a strong foundation in CS fundamentals (CS/CE/EE degree or equivalent)
Worked on scalable, high-performance backend systems — especially anything involving concurrency, data, storage, or distributed components
Take ownership like a founder and enjoy building core systems that need to be fast, reliable, and correct
Thrive in fast-moving, ambiguous environments where you learn quickly and solve new technical problems
Communicate clearly, collaborate well across teams, and move work forward with momentum

Preferred

Startup experience or the grit to operate in a high-velocity environment — bonus points if you've worked on infrastructure, databases, or large-scale backend systems

Benefits

100% coverage for medical, dental, and vision insurance
$70/day DoorDash credit for unlimited breakfast, lunch, dinner, and snacks
$200/month wellness reimbursement (gym, fitness classes, etc.)
$300/month commuter reimbursement (gas, Caltrain, etc.)
$75/month phone bill reimbursement
$50/month internet reimbursement

Company

Retell AI

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Retell AI is the AI voice platform that helps corporate call centers automate calls indistinguishable from human.
dateFounded in 2023
location
San Francisco, California, USA
people-size11-50 employees
web-link
https://retellai.com

H1B Sponsorship

Retell AI 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 (5)
2024 (3)

Funding

Current Stage
Early Stage
Total Funding
$4.68M
Key Investors
Alt CapitalY Combinator
2024-04-03Seed· $4.55M
2023-11-01Pre Seed· $0.12M

Leadership Team

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Evie Wang
Co-Founder
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Recent News

SiliconANGLE
Retell AI targets human bottlenecks in agentic voice AI with automated QA
2025-12-17
GlobeNewswire
Retell AI, Fastest-Growing AI Voice Agent Platform, Launches First Automated QA Solution to Accelerate Enterprise Adoption of Voice AI
2025-12-17
Company data provided by crunchbase