Phonely

3 months ago

Senior Backend Engineer (Series A Backed)

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI

Last checked: 8 hours agoStatus: Live

Job Summary

Senior Backend Engineer to build Python-based state systems for real-time voice AI, integrating multiple LLM providers, and designing microservices with AWS, Kubernetes, and modern backend tooling. You will write high-performance Python, tests, and contribute to secure, scalable infrastructure in San Francisco.

Location: San Francisco

Workplace: Onsite

Employment Type: Full time

Job Function: Software Engineering

Seniority: Sr. Manager level

Key Responsibilities

•Build and maintain Python-based state systems that drive voice AI in real-time conversations.
•Integrate and orchestrate multiple LLM providers, including prompt design, tool/function calling, routing, and fallbacks.
•Write clean, maintainable, high-performance Python code using asyncio and OOP, with best practices.
•Write automated tests and validation suites to ensure correctness, resilience, and safe iteration of agent logic and state transitions.
•Monitor production systems, debug agent behavior, and continuously improve reliability and conversation quality.

Pay and Benefits

Salary: USD 180,000 - 230,000 annually

Equity and Bonus:Equity

Key Requirements

•5+ years writing Python, experience writing async web apps using FastAPI and testing frameworks
•Understanding of LLMs, APIs, Cloud, CI/CD pipelines
•Understanding of technical specifications and good architecture
•Strong technical and communication skills
•Experience with AWS & Kubernetes

Experience:5+ yearsVoice AISaasCloudWeb services

Skills:PythonAsyncioLLMsAPIsSecurityTestingCI/CDAWSKubernetesDatadogRedisSQLNoSQLFirebaseSupabaseNext.jsSIP

Tech Stack:PythonAsyncioAWSKubernetesRedisFirebaseSupabaseNext.jsDatadogSIPReal-timeLLMsCI/CD

Eligibility

Visa:US citizen/visa only

Work Authorization:Authorization required. Sponsorship not provided.

Company Brief

Phonely

Develops AI-driven voice agents that automate phone conversations for businesses, handling customer support, lead qualification, and sales outreach. Their platform uses natural language understanding and speech synthesis to conduct human-like calls and integrate with CRM systems.

Industry: AI & Machine Learning

Website

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Phonely

3 months ago

Senior Backend Engineer (Series A Backed)

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI

Last checked: 8 hours agoStatus: Live

Job Summary

Location: San Francisco

Workplace: Onsite

Employment Type: Full time

Job Function: Software Engineering

Seniority: Sr. Manager level

Key Responsibilities

•Build and maintain Python-based state systems that drive voice AI in real-time conversations.
•Integrate and orchestrate multiple LLM providers, including prompt design, tool/function calling, routing, and fallbacks.
•Write clean, maintainable, high-performance Python code using asyncio and OOP, with best practices.
•Write automated tests and validation suites to ensure correctness, resilience, and safe iteration of agent logic and state transitions.
•Monitor production systems, debug agent behavior, and continuously improve reliability and conversation quality.

Pay and Benefits

Salary: USD 180,000 - 230,000 annually

Equity and Bonus:Equity

Key Requirements

•5+ years writing Python, experience writing async web apps using FastAPI and testing frameworks
•Understanding of LLMs, APIs, Cloud, CI/CD pipelines
•Understanding of technical specifications and good architecture
•Strong technical and communication skills
•Experience with AWS & Kubernetes

Experience:5+ yearsVoice AISaasCloudWeb services

Skills:PythonAsyncioLLMsAPIsSecurityTestingCI/CDAWSKubernetesDatadogRedisSQLNoSQLFirebaseSupabaseNext.jsSIP

Tech Stack:PythonAsyncioAWSKubernetesRedisFirebaseSupabaseNext.jsDatadogSIPReal-timeLLMsCI/CD

Eligibility

Visa:US citizen/visa only

Work Authorization:Authorization required. Sponsorship not provided.

Company Brief

Phonely

Industry: AI & Machine Learning

Website