Sales Engineer

a1mobile; San Francisco (CA); Hybrid; USD 130,000 - 160,000; Full time

Job summary

a1mobile is seeking a Sales Engineer in the San Francisco Bay Area. The hybrid role combines in-office collaboration with field demonstrations, powering AI-enabled telecom solutions for small businesses.

You'll run live demos, answer technical questions on porting, SIM activation, and integrations; visit businesses in person, design call-handling workflows, and partner with Account Executives through the full sales cycle.

Qualifications

• 3+ years as a Sales Engineer, Solutions Engineer, or Solutions Consultant in B2B SaaS, telecom, or VoIP.
• Solid understanding of telephony: phone numbers, porting, SIP/VoIP, call routing, and SMS.
• Ability to explain technical concepts in plain language to busy business owners.
• Comfort with door-to-door selling: visiting businesses and closing in person.

Responsibilities

• Run live demos showing the AI receptionist handling calls, texts, bookings, and orders.
• Answer technical questions on number porting, eSIM/SIM activation, landline adapters, call flows, and integrations.
• Scope customer setups from single-location to multi-location and design their call-handling workflows.
• Go door to door with the sales team to demo the product live and sign up customers on an a1mobile number.
• Partner with Account Executives through the full sales cycle, from discovery to technical close.
• Build demo environments, playbooks, and technical FAQs for the sales team.
• Turn customer feedback into clear product input for engineering and product.

Skills

Telephony knowledge

Explain technical concepts

Door-to-door selling

Presentation skills

Team collaboration

Tools

APIs

Webhooks

SaaS integrations

Porting

Call handling

Job description

Sales Engineer · Hybrid, San Francisco Bay Area

Base salary: $130,000–$160,000 · OTE: $175,000–$215,000

This is a hybrid role based in our San Francisco office. You should live in the San Francisco Bay Area and be able to work from the office a few days a week.

This role requires in-person, door-to-door sales. A large part of the job is visiting small businesses in person across the Bay Area and getting them set up on an a1mobile business number.

About a1mobile

a1mobile is building the AI-native carrier for businesses.

We're rebuilding the carrier layer, bringing mobile, landline, and AI phone systems together. Every business number should answer, understand, take action, and follow up.

Our first product, a1mobile One, is one business line for $99/month: unlimited calls and texts, 5G data, and an AI receptionist built into the carrier itself. It answers every call and text 24/7, takes bookings and orders, sends quotes and follows up. Our customers are small service businesses: restaurants, cafes, salons, studios, contractors, and hotels.

We recently raised an $11.5M seed round led by General Catalyst, with backing from Menlo Ventures, SV Angel, Commerce Ventures, and other leading investors.

We're looking for a Sales Engineer who can make a new kind of carrier easy to understand and easy to switch to. You'll be the technical partner in every deal: running demos, answering deep questions about numbers, porting, and AI call handling, and making sure every customer goes live smoothly.

• 3+ years as a Sales Engineer, Solutions Engineer, or Solutions Consultant in B2B SaaS, telecom, or VoIP.

What you'll do

• Run live demos that show the AI receptionist handling real calls, texts, bookings, and orders.
• Answer technical questions on number porting, eSIM and SIM activation, landline adapters, call flows, and integrations.
• Scope customer setups, from single-location shops to multi-location businesses, and design their call-handling workflows.
• Go door to door with the sales team, visiting target businesses in person to demo the product live and sign them up on an a1mobile number.
• Partner with Account Executives through the full sales cycle, from discovery to technical close.
• Build demo environments, playbooks, and technical FAQs the whole sales team can use.
• Turn customer feedback into clear product input for engineering and product.

What we're looking for

• A solid understanding of telephony: phone numbers, porting, SIP/VoIP, call routing, and SMS.
• The ability to explain technical concepts in plain language to busy business owners.
• Comfort with APIs, webhooks, and SaaS integrations like calendars, POS, and booking tools.
• Excellent presentation skills, in person and on video.
• Comfort with door-to-door selling: walking into businesses, starting conversations with owners, and closing in person. Reliable transportation is needed.
• A strong sense of ownership and the ability to move work forward without waiting to be told.
• A team player who communicates openly, shares knowledge, and collaborates closely with others.
• The flexibility to adapt and keep pace with a fast-moving startup.

Nice to have

• Experience with voice AI or LLM-based products.
• Experience at a carrier, MVNO, or UCaaS company.
• Experience at an early-stage startup.

You’ll sit at the intersection of telecom, voice AI, and sales, and your feedback will shape the product as much as the pipeline.

a1mobile is an equal opportunity employer. Employment decisions are based on qualifications, merit, and business needs, without discrimination on any basis protected by applicable law. Pursuant to the San Francisco Fair Chance Ordinance, we will consider qualified applicants with arrest and conviction records for employment.