Senior Software Engineer, Backend
Full-time
Stealth Startup
About
We're not just automating calls—we’re transforming how the world communicates. Our AI voice agents are reshaping sales, support, and customer engagement for leading brands. Backed by Alt Capital, Y Combinator, and top-tier investors, we've raised $4.7M in seed funding and hit $14M ARR with just 12 people.
We’re one of the fastest-growing Voice AI startups and we're on a mission to become the standard for voice automation at scale.
About the Role
As a Founding Senior Backend Engineer, you’ll shape the core systems powering millions of AI-driven conversations. You’ll tackle real-time audio, global telephony, and developer tooling, working across the stack with the founding team. This high-impact role offers rapid feedback loops, customer collaboration, and the chance to define a category-leading product.
Key Responsibilities
- Build foundational architecture for the company'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.
You Might Thrive If You
- Have 2+ years of backend development experience with a degree in CS, CE, or EE.
- Take ownership like a founder, with a passion for impactful software.
- Thrive in fast-paced, ambiguous environments, solving new problems with curiosity.
- Communicate clearly, collaborate across teams, and drive momentum.
- Have startup experience or grit to adapt, with bonus points for cloud infra/DevOps knowledge.
Job Details
- Job Type: Full-time, 70 hr/week (50 hr/week onsite with flexible hours + 20 hr/week work from home)
- Cash: 215k - 290k
- Equity : 0.4 - 0.6%
- Location : Redwood City, CA, US
- US Visas : Sponsors Visa & Green Card
Other Benefits
- 100% medical, dental, vision insurance coverage
- Unlimited breakfast, lunch, dinner, and snacks
- Gym and daily commute fee reimbursement
- Internet and phone bills covered
Compensation Philosophy
- Best Offer Upfront : Choose from three cash-equity balance options, no negotiation needed.
- Top 1% Talent : Above-market pay (top 5 percentile) to attract high performers.
- High Ownership: Small teams, >$1M revenue/employee, and significant equity.
- Performance-Based : Offers tied to interview performance, not experience or past salaries.
Vacancy posted 8 hours ago
Similar jobs that could be interesting for youBased on the Senior Software Engineer, Backend in United States vacancy
$180k - $320k
...About the Role Join the backend team for a no-code customer data activation product that helps users build audiences and send data... ...What We're Looking For Six to fifteen years of backend engineering experience, including substantial work designing and building...SeniorFull timeRemote workVisa sponsorship$180k - $320k
...About the Role Join the backend team for a no-code customer data activation product that... ...data to downstream tools. This senior, product-minded role will shape scalable... ...Looking For Six or more years of backend engineering experience, including substantial experience...SeniorFull timeRemote workVisa sponsorship$160k - $200k
...Join Our Team We've experienced tremendous growth over the past several years and are hiring experienced engineers to help us scale our backend infrastructure and to support the development of several new products on our roadmap. In joining our team, you will help...SeniorRemote worknumero
United States4 days ago- ...Senior Backend Engineer We're looking for a Senior Backend Engineer to build and scale the core systems that power DevZero's Kubernetes optimization platform. You'll work on distributed systems, data pipelines, and optimization algorithms that help our customers save...SeniorRemote workHome office
Devzero
United States13 hours ago $175k - $205k
...Greylock and Y Combinator, fully remote since 2018. As a Senior Software Engineer at Postscript, you'll be a high-ownership contributor to... ...build, and maintain highly available, scalable REST APIs and backend services for internal and external use Drive system...SeniorFull timeRemote workWork from homeFlexible hours$186.07k
...get together quarterly for intense in-person working sessions called “surges.” learn more about working at Coinbase. Senior Software Engineer, Backend (Consumer - Risk) As a Senior Software Engineer on the Risk Engineering team within the Consumer & Business group,...SeniorFull timeLocal area$173k - $255k
...surprises, and no tradeoffs on what matters most. Consumer Engineering builds the Affirm experience millions of people use to pay over... ...4+ years of experience designing, developing and launching backend systems at scale using languages like Python or Kotlin. You...SeniorFull timeWork at officeRemote workFlexible hours$179k - $242k
...accessible with a shared identity. As a Senior Backend Developer, you'll be responsible for... ...internal tools Work closely with engineers across the organization to integrate safety... ...strong fundamental programming and software engineering skills Have built scalable...SeniorRemote workVeho
United States2 days ago$170k - $200k
...Software Engineer (Backend / Full Stack) Early-Stage AI Startup | New York City, NY | Onsite Compensation: $170,000–$200,000 Base + Equity Company Stage: Seed Employment Type: Full-Time Want to Help Build the Future of AI? Ready to Put in the Work?...SeniorFull timeMonday to FridayPeople In AI
New York, NY7 days ago- ...products - we're creating a new credit system that backs the working, whatever they're working toward. The Opportunity: Senior Software Engineer, Backend We're looking for Senior Backend Engineers who care about building scalable, reliable systems - and who thrive in...SeniorWork at officeRemote workWork from homeWorldwideFlexible hours
Tilt.com
United States18 hours ago - PLEASE CLICK HERE TO SEE *ALL* OF OUR JOB OPENINGS!Senior Software Engineer — Backend PerformanceAs a Senior Software Engineer on Backend Performance, you own the hottest paths in data products — the code that has to be fast because everything downstream depends on it....Senior
Three Pillars Recruiting
San Francisco, CA1 day ago $121k - $200k
...and delighting sports fans globally. Overview As a Backend Engineer at Fanatics Core, you'll design, develop, test, and maintain... ...Responsibilities Develop, test, document, and deploy high quality software into production Build features and tools that you and...SeniorFull timeRemote work- ...Position: Senior Software Engineer - (Backend Focused - NodeJS, AWS) Location: 100% Remote Duration: Long Term Contract Required Skills: Designs, Builds, tests, deploys and maintains production code for complex web-based applications using Cloud technologies...SeniorLong term contractFull timeRemote work
Kellton
United States1 day ago $500 per month
...AI/ML Engineering Team Opportunity The AI/ML Engineering team builds and operates ClickHouse... ...for highly skilled and experienced software engineers to join us, who will be responsible... ...features across the full stack, from backend inference services to intuitive frontend...SeniorLocal areaRemote workHome officeFlexible hoursClickHouse
United States4 days ago- ...Platform Engineer Opportunity Our feature teams can only move as fast as the platform underneath them, and we want to help them move... ...data and architecture skills — production experience building backend services and APIs, and current best practices in data modeling...SeniorRemote work
Honeydew Services
United States13 hours ago - ...increased profits and better client retention and referrals. About the Role - We are seeking a talented and experienced Senior Software Engineer - Backend to join our team. In this role, you will be a key contributor to the designing and building of a highly scalable,...SeniorWork at officeRemote workWork visa
Jobba Trade Technologies
Chicago, IL9 days ago $156.2k - $262.6k
...PCF) team is part of Platform Engineering. We build the internal cloud... ...one-off requests, we design software that lets teams provision accounts... .... About the role As a Senior Software Development Engineer... ...: Design, build, and own backend services and APIs that make cloud...SeniorPermanent employmentFull timeLive inWork at officeLocal areaRemote work$188k - $242k
...reliability, and scalability of our existing systems Promote engineering excellence through technical leadership, knowledge-sharing... ...and secure How You Will Do Your Work As a Senior Software Engineer, how results are achieved is paramount for your success...SeniorCasual workWork at officeLocal area$110k - $270k
...Senior Software Engineer - Backend Veeva Systems is a mission-driven organization and pioneer in industry cloud, helping life sciences companies bring therapies to patients faster. As one of the fastest-growing SaaS companies in history, we surpassed $3B in revenue...SeniorWork at officeLocal areaRemote workWork from homeFlexible hoursVeeva Systems
United States2 days ago- RESPONSIBILITIES: Kforce's client is looking to add a Senior Software Engineer to their team. This role is a 6-month contract to hire in Saint Louis, MO. Summary: Are you a back-end engineer who loves solving complex technical challenges at scale? Our client is...SeniorHourly payContract work
$150k - $185k
...Job Title: Senior Software Engineer, Backend Location: Remote (United States) Reports To: Engineering Manager Department: Product Development FLSA Status: Exempt Planet Depos is a leading global court reporting firm that harnesses innovative technology...SeniorPermanent employmentContract workRemote workPlanet Depos
United States2 days ago- ...Senior Software Engineer (Backend) Home based - EMEA Canonical is a leading provider of open source software and operating systems to the global enterprise and technology markets. Our platform, Ubuntu, is very widely used in breakthrough enterprise initiatives such...SeniorWork at officeLocal areaRemote workWork from homeWorldwide
Canonical
United States13 hours ago - ...this team like it's the most important bet at the company.As a Senior Engineer on AI Platform, you'll own meaningful technical initiatives... ...approaches unlock better outcomesWhat you will need5+ years of software engineering experience with a proven track record of owning...SeniorWork at office3 days per week
Rippling
New York, NY2 days ago - ...and insurtech company is seeking an AI Engineer to join its engineering team and help build... ...scale.This role is heavily focused on backend development and Generative AI, with an emphasis... ...Skills & Experience 4+ years of backend software engineering experience. Strong...Senior
Motion Recruitment
Boston, MA1 day ago - Amazon is hiring a Sr. Software Development Engineer to join our Distant Setup group in Guadalajara. The role focuses on backend services that power devices and apps across Amazon devices, with a hybrid work model (3 days in the office, 2 days remote) and a focus on scalable...SeniorRemote jobWork at office
$185k - $230k
...OpportunityWe’re building the next generation of AI-native product experiences, where conversations turn directly into outcomes. As a Senior Software Engineer on our Product teams, you’ll own significant areas of the product and play a key role in shaping how AI capabilities...SeniorPermanent employmentOtter.ai
Mountain View, CA2 days ago- ...Senior Software Engineer (Backend Focus) | AWS | Python | Node.js - (W2 Contract) - Hybrid in Charlotte, NC Optomi, in partnership with a leading electric and gas utility company, is seeking a Full-Stack Software Engineer with a strong backend development focus to join...SeniorContract work
Optomi
Charlotte, NC21 days ago $173k - $255k
...optimized compute solution to enable ML, Product, and Financial Engineering success. Our team is responsible for building and maintaining... ...4+ years of experience designing, developing and launching backend systems at scale using languages like Python or Kotlin. You...SeniorFull timeWork at officeRemote workFlexible hours- ...financial workflows with more speed, confidence, and accuracy.As a Senior Software Engineer on this team, you will help define how AI becomes a core... ...systems at meaningful scale.Experience designing backend systems, data models, APIs, workflows, or platform infrastructure...SeniorWork at office3 days per week
Rippling
San Francisco, CA4 days ago - ...addresses.About the Financial Product TeamThe Financial Product Engineering team is at the forefront of Rippling's expansion into FinTech.... .... What you will doOwn the design and implementation of core backend services and APIs that power critical product capabilities and...SeniorWork at office3 days per week
Rippling
San Francisco, CA1 day ago
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Senior Software Engineer, Backend. Be the first to apply!
Related searches
- software engineer internship remote United States
- software engineer remote United States
- graduate software developer no experience United States
- work from home software developer United States
- summer intern software engineer United States
- junior software developer United States
- information technology software engineer United States
- senior software engineer remote United States
- rust software engineer United States
- part time software developer United States