Founding Software Engineer, Full-Stack & Platform

Vincer; Massachusetts; On-site; USD 140,000 - 220,000; Full time

Job summary

Vincer is seeking a founding software engineer to own the production spine of a voice-first AI system for life sciences customers. You will be one of the first two full-time engineers, with no engineering hierarchy above you, and you will shape technical direction and roadmap.

You will build backend services, APIs, real-time communication, and infrastructure for enterprise clients, aiming for low latency, security, and auditability. The role requires in-person collaboration in Boston or NYC.

Qualifications

• 5+ years of software engineering experience in full-stack systems with a backend, API, and platform orientation.
• Experience with real-time, streaming, or low-latency systems such as voice, video, or similar.
• You have owned cloud infrastructure end-to-end on a major provider.

Responsibilities

• You will own the product platform behind Vincer's user experience, spanning backend services, APIs, data flows, real-time communication, and infrastructure.
• Vincer is built for enterprise life sciences customers, focusing on security, compliance, auditability, reliability, and trust from day one.

Skills

Full-stack systems

Backend

APIs

Platform orientation

Real-time systems

Low-latency

Tools

AWS

Cloud infrastructure

Job description

Founding Software Engineer, Full-Stack & Platform

Vincer looking for a founding engineer who wants to own the production spine of a voice-first AI system and have influence over what gets built for our life sciences customers. You'll be one of the first two full-time engineers, joining alongside a Founding AI Engineer and the co-founders and technical advisors. There is no engineering organization above you handing down decisions. You'll inherit a working MVP and get to decide what to keep and set the technical direction and future roadmap with us.

Problem We’re Solving: Life sciences sales reps operate in complex environments, supporting surgeons, physicians, and clinical teams across pharma and medical device. They often making decisions about what to say or the best actions to take while alone in the field without support or the ability to record and review their conversations. When reps struggle to find the right information, recognize an issue, or get the right support, the consequences extend beyond sales performance. A clinician may not get the treatment information they need when they need it, a surgeon may not feel confident using a device, or an important problem in the field may never make its way back to the organization. This ultimately impacts patient outcomes.

We’re closing this field support gap by building a voice-first AI decision support system for life sciences field teams when judgment, scientific knowledge, and speed matter most. The product has to understand messy, unstructured situations, assemble the right context, retrieve approved knowledge, orchestrate multiple AI systems, know when to escalation, and respond fast enough to feel conversational.

THE ROLE

You will own the product platform behind Vincer's user experience, spanning backend services, APIs, data flows, real-time communication, and infrastructure. Vincer is being built for enterprise life sciences customers, where security, compliance, auditability, reliability, and trust matter from day one. Low latency is a product requirement. A voice-first system only works when context retrieval, model reasoning, orchestration, and response generation happen fast enough for conversation to feel natural.

The system is agentic by design: it decides when to act, not only what to say. Agents work from rep activity and accumulated context rather than waiting to be prompted, coordinate across multiple models and data sources, and make a judgment call about whether to handle something directly, route it, or escalating it to a human. Getting that behavior to be reliable, observable, and safe in a regulated environment is a core engineering challenge.

Examples of Core Projects

• Deliver the real-time systems that make voice interactions fast, resilient, and natural in the field


• Build the runtime behind a multi-agent system that acts on its own initiative: triggering, state, memory, and the guardrails that make autonomous behavior safe for enterprise customers


• Build the integration layer that connects Vincer to the systems reps and managers already live in: CRM (Veeva, Salesforce), Slack, Teams, and customer data APIs


• Expand the backend services and cloud infrastructure behind live customer use, and own what that requires: observability, deployment, reliability, cost


• Build the data foundation for customer workflows, reporting, and auditability


• Establish the security and compliance posture that enterprise life sciences customers require, with guidance from advisors who have implemented AI systems inside life sciences organizations


• Ship internal tools, customer-facing data interfaces, and simple web/mobile experiences

WHO WE NEED:

Our ideal candidate has worked in a startup environment in recent years and wants to join a new venture at its earliest stages. You understand that early product development requires fast iteration across platform, AI, systems, and customer learning. You are located in Boston or NYC and understand that regular in-person collaboration is non-negotiable.

Required Experience

• 5+ years of full-time software engineering, building full-stack systems with a strong backend, API, and platform orientation


• Experience with real-time, streaming, or low-latency systems: voice, video, collaboration, gaming, or similar


• You’ve owned cloud infrastructure end to end on a major provider

What Would Make You Stand Out

• Enterprise software delivery, especially in a regulated industry (healthcare, finance, or similar)


• Experience integrating with enterprise SaaS and customer data systems, such as CRM, identity, or communication platforms (i.e. Slack, Teams, etc.)


• Experience with non-deterministic systems in production, and opinions about how to evaluate and roll back behavior you can’t unit-test


• Enough frontend range to ship internal tools and customer-facing data interfaces without a dedicated frontend team

How You Work

You have strong architecture and database instincts, and you know when boring proven technology is the right answer and when the product genuinely needs something specialized. You use modern AI coding tools as a matter of course and expect a small team to ship beyond its size. You want broad ownership, fast decisions, and the accountability that comes with them.

This role owns the engineering foundation that carries Vincer from early deployment through scale. If that’s the kind of challenge you want to own, we’d like to hear from you!

***At this time, Vincer is unable to hire candidates who require employment visa sponsorship or employer participation in work authorization programs.***