What are the responsibilities and job description for the Senior Software Engineer position at dynamism vc?

Location : San Francisco, CA (In-office)

Remuneration : $150k-$300k Equity 0.20% to 0.50%

Employment Type : Full-time

At Dynamism.io, we’ve partnered with the founding team at Voice AI, a cutting-edge voice AI startup from Y Combinator’s Winter 2021 batch, to find a talented Founding Senior Software Engineer (Backend / Full Stack). Voice AI is building voice AI tools for developers, with an emphasis on flexible and iterative work processes.

About Voice AI :

Voice AI, a YC W21-backed startup, is building the "Retool for Voice AI," empowering developers to integrate voice technology across industries. As Apple Intelligence and Google Gemini onboard 4 billion people to human-like voice assistants, Voice AI’s platform bridges the gap between raw models and production-ready voice applications. From SaaS and logistics to telehealth, Voice AI is preparing businesses for the voice-driven future. Since launching in March, Voice AI has quickly scaled revenue and recently raised a Series A from a top-tier firm.

Voice AI is at the forefront of voice technology innovation, with a team that values agility, rapid iteration, and delighting users. Based in San Francisco, Voice AI is offering a unique opportunity for a Founding Senior Software Engineer (Backend) to take ownership of the backend platform and play a key role in defining the future of the product.

Role Overview and Responsibilities

As Voice AI’s Founding Senior Software Engineer (Backend), you’ll own features end-to-end, from initial customer requests through to deployment, all while working within a modular, API-first architecture. Your work will include meeting real-time, low-latency constraints and collaborating closely with the founding team. Beyond building, you’ll also play a key role in shaping Voice AI’s engineering culture.

Your core responsibilities :

End-to-End Feature Ownership : Take features from idea to deployment, using an API-first, modular approach.
Real-Time System Design : Build with a focus on speed and reliability within real-time, low-latency environments.
Culture Building : Set the standard for how we work together and help create a collaborative engineering culture.

Key milestones

Deliver Key Features and Projects :

First 7 days : Ship a pre-scoped feature.

First 30 days : Ship a feature independently.

Ship Optimizations and Refactors :

First 14 days : Ship a scoped optimization or refactor, e.g., improve latency in a speech-to-speech component.

First 30 days : Deliver an independent optimization or refactor, such as refining a tool-calling mechanism to improve determinism.

Customer Interaction :

Within 14 days, handle a support request and deliver a customer-requested fix.

Proactively pick up customer feedback, investigate, and solve within 14 days.

Build Delightful Experiences :

Unprompted, ship something to delight a customer within the first 30 days, such as enhancing a call analytics endpoint.

Core Requirements

5 years of experience in Full Stack or Backend Software Engineering.

2 years of experience designing and deploying features you’ve built yourself.

Minimum 1 year of experience working in a fast-paced company (

Strong proficiency with the React and Typescript frontend stack.

Previous experience in a Founding, Senior, Staff, or Principal Engineer role.

Willingness to work in-office with the team 5 days / week in San Francisco.

Ideal candidate

Communication : Able to clearly articulate your thoughts and decisions.

Drive (“Cracked-ness”) : Bring more drive and tenacity than the most driven person on the team.

Startup Readiness : You’re committed to Voice AI’s mission and can navigate the uncertainties of a startup environment.

Creative Initiative (“Founder Juice”) : New ideas come naturally to you, and you’re proactive about making them happen—even if it means rallying the team to get things done.

What Voice AI Offers :

Salary : Competitive, ranging from $150k to $300k.

Equity : Significant ownership, ranging from 0.20% to 0.50%.

Location : Based in San Francisco, with the opportunity to work closely with the founders and shape the direction of the company.

Candidate Process :

Intro call with the CEO : An introductory conversation about motivations and a brief technical discussion.

30-minute Technical Interview with the CTO : Focused on architectural and system design.

In-person interview with the Founders : A casual meet-up to discuss company vision and culture.

Work Trial (1 week) : A paid 3- to 7-day work trial to collaborate with the team and assess fit.

If you’re passionate about building scalable frontend systems and want to join a mission-driven team creating cutting-edge voice AI tools, Voice AI could be the perfect place for you.

Apply now to join Voice AI and be part of building the future of voice AI technology.

Salary : $150,000 - $300,000

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