Sr. Full Stack Engineer, AI Voice Platform

Hillmont Group; New York (NY); On-site; USD 200,000 - 240,000; Full time

Benefits offered by this job

Medical insurance

401(k)

Job summary

A prominent tech firm in New York is looking for a Sr. Full Stack Engineer to own the AI voice platform, including Salesforce integrations and email automation. The role requires strong proficiency in Node.js and C#/.NET, alongside extensive AWS experience. You will lead the architecture, deliver services across critical systems, and improve operations reliability. Additional skills in telephony/voice APIs are a bonus. This position offers a salary range of $200,000.00 to $240,000.00 annually, with benefits including medical insurance and a 401(k).

Qualifications

• 7+ years backend engineering experience owning production systems end‑to‑end.
• Strong proficiency in Node.js/TypeScript and/or C#/.NET.
• Hands‑on AWS experience including Lambda and API Gateway.
• Deep experience integrating with third‑party APIs, especially Salesforce.

Responsibilities

• Lead development of outbound calling scheduler and orchestration services.
• Own SOQL/REST integrations for Salesforce-backed workflows.
• Maintain and evolve email automation pipelines.
• Improve reliability across services and Lambda functions.
• Shape event‑driven AWS architecture.

Skills

Node.js

TypeScript

C#/.NET

AWS

Salesforce integration

Debugging

Performance tuning

Job description

Sr. Full Stack Engineer, AI Voice Platform

1 day ago Be among the first 25 applicants

This range is provided by Hillmont Group. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

Base Pay Range

$200,000.00/yr - $240,000.00/yr

Additional Compensation Types

• Annual Bonus
• Direct message the job poster from Hillmont Group

Executive Search for Mid-Market Firms | Emerging Tech & Transformation Talent | Culture-First. Execution-Ready. | Partner to Executives & PE Firms |…

We’re hiring an Sr. Full Stack Engineer to own the end-to-end platform powering an AI voice assistant, Salesforce integrations, and email automation services. You’ll lead architecture, reliability, and delivery across multiple business‑critical systems, spanning Node.js orchestration, Salesforce services, and AWS serverless infrastructure. As the domain grows, this role will expand into building and leading a small engineering team.

Responsibilities

• AI Voice Orchestration (Node/TypeScript): Lead development of our outbound calling scheduler, orchestration services, webhook handling, ElevenLabs integration, and real‑time warm‑transfer notifications.
• Salesforce Services (C#/.NET): Own SOQL/REST integrations, composite APIs, record search/update logic, and token/auth flows for all Salesforce‑backed workflows.
• Email Automation: Maintain and evolve pipelines that trigger outbound email workflows based on Salesforce record updates and submission logic.
• Reliability & Operations: Improve latency, idempotency, retries/backoff, logging, monitoring, and error handling across Lambda functions and services.
• Architecture: Shape our event‑driven AWS architecture. Driving design decisions, standards, and long‑term platform evolution.
• Cross‑functional alignment: Collaborate with Salesforce admins, sales, operations, and product to translate business rules into robust, maintainable systems.
• Technical leadership: Set code standards, review high‑impact changes, document systems clearly, mentor engineers, and hire as the team expands.

Skill Requirements

• 7+ years backend engineering experience owning production systems end‑to‑end.
• Strong proficiency in Node.js/TypeScript and/or C#/.NET with willingness to work across both.
• Hands‑on AWS experience (Lambda, API Gateway, DynamoDB, CloudWatch).
• Deep experience integrating with third‑party APIs, especially Salesforce (SOQL/REST/OAuth).
• Strong fundamentals in debugging, performance tuning, async workflows, and distributed system behavior.
• High ownership and comfort leading a mission‑critical platform.

Bonus Skills

• Experience with telephony/voice APIs (Twilio, ElevenLabs).
• Email systems (SendGrid, SES) and CRM‑driven journeys.
• Real‑time communication systems (WebSockets, push notifications).

Seniority Level

Mid‑Senior level

Employment Type

Full‑time

Job Function

Information Technology

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Benefits Implied

• Medical insurance
• 401(k)

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