Founding Engineer at Ambral | New York

AmbralNew York

On-site Full-time

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Experience Level

Experience

Qualifications

QualificationsMinimum of 3 years of experience in full-stack development, particularly with distributed architectures. Experience building AI systems and pipelines, with a solid understanding of their reliability and observability requirements. Proficiency in working with systems that manage and transform large datasets. Ability to make pragmatic trade-offs to ship functional solutions quickly, while designing architectures that allow for future scalability. Strong communication skills, especially in conveying complex technical concepts to non-technical stakeholders. A passion for innovative ideas that feel transformative (e.g., real-time user experience). A visionary mindset, excited by challenges that seem daunting to solve. Eager to produce your best work and contribute to a project you will take pride in for years to come.

About the job

About Us

At Ambral, we are pioneering the development of digital models that accurately predict individual and team behaviors. Our innovative 'digital twins' synthesize multiple signals, ranging from product telemetry and customer interactions to operational data, into a unified understanding of each customer. Our intelligent agents enhance this context by recommending optimal actions and executing workflows, ensuring teams can provide an exceptional customer experience.

Having graduated from Y Combinator in Summer 2025 and secured significant funding, we are already implementing our solutions in multi-billion dollar enterprises. We are on a trajectory for rapid growth and are looking for talented individuals to join our mission.

Your Role

As a Founding Engineer, you will take a lead role in developing our core platform responsible for data ingestion and the creation of 'digital twins', along with the agentic systems that operate on this data (e.g., Voice, SMS, and Email agents). You will collaborate closely with our CTO across various aspects of the platform, which includes:

Memory: Refining how we represent our customer models.
Detection Framework: Identifying the right primitives for building detection agents.
Agent Design: Transforming signals into reliable autonomous actions.
Distributed Systems: Managing thousands of agents running simultaneously.
Evals: Ensuring our agents continually improve their performance.

Additionally, you will engage directly with our customers, overseeing projects from inception to completion.

About Ambral

Ambral is at the forefront of digital transformation, creating sophisticated models that accurately predict customer behavior. Our innovative solutions are designed for large enterprises, helping them make informed decisions and enhance customer interactions. With backing from Y Combinator and significant funding, we are set to revolutionize the industry.

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Full-time|On-site|New York

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Feb 20, 2026

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Full-time|$121K/yr - $175K/yr|On-site|New York, New York

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Mar 11, 2026

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Founding Engineer at Meridian | New York City

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Full-time|On-site|New York City

About MeridianAt Meridian, we are pioneering the development of the first multi-agent platform designed to empower enterprise brands in marketing and selling to AI technologies.With the shift from traditional search engines to cutting-edge AI platforms such as ChatGPT, Gemini, and Claude, businesses must adapt to ensure their visibility and representation within these systems. We are creating the solution that enables this transition. Already utilized by hundreds of clients, our core concept is validated, and this is your chance to significantly influence our journey as we grow.The RoleAs a Founding Engineer, you will collaborate closely with the founders to build the fundamental systems that enhance Meridian's operations. You will tackle complex, high-stakes challenges and transform them into reliable software solutions that function autonomously in production environments.This position is ideal for engineers who seek extreme ownership, rapid execution, and the chance to shape a company from the ground up.Your ResponsibilitiesEnd-to-End Ownership: Tackle loosely defined business challenges and drive them from conception through system design, implementation, and iteration; you are accountable not only for coding but also for defining the necessary features and ensuring their real-world efficacy.Agent Design and Development: Develop internal tools and systems that facilitate Meridian's ability to define, execute, and monitor intricate workflows, gradually enabling these systems to manage workflows autonomously.Data and Decision Systems: Construct and refine the pipelines that fuel our platform, including data ingestion, analysis, AI model orchestration, evaluation, and feedback loops that enhance system performance over time.Practical Problem Solving: Comprehend user and agent search behaviors across various markets, identify signals utilized by AI systems to generate responses, and develop fully autonomous workflows.Strategic Technical Decisions: Make impactful trade-offs that shape the long-term development of our product and company, prioritizing actions that significantly contribute to our mission.Company Shaping: Collaborate closely with founders and the initial team to influence product direction, system architecture, and engineering culture.

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Founding Fullstack Engineer at Everstar | New York City

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Full-time|On-site|New York City

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Dec 26, 2025

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Founding Frontend Engineer at Crosby | New York City

Crosby

Full-time|$170K/yr - $225K/yr|On-site|New York City

Join the Future of Legal Services with Crosby!At Crosby, we are revolutionizing the legal landscape. Our innovative team of technologists and legal experts is dedicated to transforming corporate legal services through cutting-edge technology and collaborative workflows. Our goal is to streamline the review of complex documents, enhancing speed and quality in the legal profession.Founded by Ryan (Penn, Stanford Law, former Cooley attorney, and GC) and John (Penn M&T, ex-Ramp, and ex-Google), Crosby is built on the belief that:A robust legal system is fundamental to a prosperous society.Legal practice merges art and science; we aim to define this balance by systematizing the process while enhancing human judgment where it matters.True AI application in law is about delivering outcomes, focusing on quality legal work executed efficiently.We thrive on an in-person culture at our NYC headquarters.The Opportunity:As our Founding Frontend Engineer, you will spearhead the user experience for the Crosby platform. Your mission will be to craft visually appealing, user-friendly, and highly functional interfaces that enable our legal team to operate with unmatched efficiency. Collaborating closely with our founders, product team, and legal professionals, you'll transform intricate workflows into seamless user experiences. This is an unprecedented opportunity to build our frontend architecture from the ground up, create our design system, and set the benchmark for quality and performance.Your Responsibilities:Frontend Architecture: Develop the core frontend of the Crosby platform utilizing modern frameworks such as React, Vite, and TanStack.User Experience Design: Design and implement high-performance user interfaces tailored for complex, data-rich legal workflows.Rapid Prototyping: Collaborate with product and our in-house legal team to swiftly prototype and refine user-facing features.Codebase Foundation: Establish a sustainable frontend codebase, which includes a comprehensive component library and design system.Collaborative Development: Coordinate with backend engineers to design and implement APIs that ensure a cohesive user experience.Team Growth: Contribute to building and mentoring our engineering team.

Jan 7, 2026

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Founding Research Engineer at Egra | New York City

Egra

Full-time|On-site|New York City

Hello, I'm Brian, the Co-Founder of Egra. We have recently secured $5.5M in funding to develop foundational models for brain signals, and we are on the hunt for our inaugural research engineer.From day one, you will possess full ownership of your projects. Forget about lengthy onboarding processes, waiting for approvals, or navigating through bureaucracies. Here, you will collaborate directly with the founders on complex technical challenges, armed with the resources necessary to address them. You will define the architecture of our infrastructure, make pivotal engineering choices, and construct the systems that drive our research forward. If you excel in an environment that values high agency and wish for your contributions to directly influence the company's direction, this is an exceptional opportunity.Key ResponsibilitiesEEG, or electrical activity of the brain recorded from the scalp, is one of the most challenging real-world signal modalities in machine learning due to its low signal-to-noise ratio, significant subject variability, and inconsistencies across devices. Most shy away from these challenges.As our founding research engineer, you will oversee the systems that facilitate our research. Specific projects you will manage include:Creating versioned and reproducible preprocessing pipelines for EEG data from various sources, including device-specific normalization, channel mapping across montages, artifact detection, and signal quality assessments. Your systems will be able to instantly respond to queries like, "Which preprocessing version generated this result?"Designing infrastructure for experiment tracking and training that allows us to conduct numerous pretraining experiments concurrently without losing track of changes in hyperparameters, data splits, preprocessing versions, and model checkpoints, ensuring everything is linked and reproducible.Developing a data ingestion system capable of assimilating various EEG formats (EDF, BDF, BIDS, proprietary device exports) and normalizing them into a clean, internal representation.Enhancing training pipelines for optimal throughput on noisy, variable-length signal data using mixed precision, intelligent batching across different recording lengths, and efficient data loading for datasets that don't conform to standard loaders.Our VisionWe are aspiring to create a world where thought serves as an interface.Imagine composing a message silently as it types itself. Or navigating an AR display without any physical interaction. Our software aims to adapt to your cognitive state in real time, establishing a universal interface between human thought and digital interaction.

Feb 11, 2026

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Founding Engineer at Noto | New York City

Noto

Full-time|On-site|New York City

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Jul 10, 2025

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