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We are looking for a highly skilled Machine Learning Engineer with strong ML Ops expertise to help design, build, deploy, and manage machine learning pipelines in production environments. The ideal candidate will have a strong foundation in machine learning algorithms, deep learning, data engineering, and experience in automating the deployment, monitoring, and scaling of models through ML Ops practices.

Responsibilities:

• Model Development: Design and develop machine learning models to solve complex problems using a variety of algorithms, including supervised, unsupervised, and reinforcement learning techniques.
• ML Ops Implementation: Develop and deploy ML workflows, integrating version control, automation, and monitoring practices to streamline model development and deployment.
• Pipeline Development: Build and maintain end-to-end machine learning pipelines for continuous integration, continuous deployment (CI/CD), and model retraining.
• Automation: Automate model training, testing, and deployment processes, ensuring high levels of efficiency and reliability in production.
• Model Optimisation: Collaborate with data scientists and engineers to optimise models for production environments, focusing on scalability, speed, and resource efficiency.
• Cloud Integration: Utilise cloud platforms (e.g., AWS, Azure, GCP) for model deployment and infrastructure management, ensuring smooth scaling and resource optimisation.
• Documentation: Maintain clear and comprehensive documentation for model workflows, ML Ops processes, and system architectures.

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FOUNDING BACKEND ENGINEER
LLM STARTUP
BROOKLYN, NY (ONSITE)
$200,000 – $250,000 BASE

THE COMPANY

Harnham is partnered with a cutting-edge startup in the technology space looking to ease the burden of LLM development and deployment. They are seed-funded and looking to hire multiple founding engineers across various pieces of their stack. This role will focus on backend development in Rust.

THE ROLE – Founding Backend Engineer

This position will report directly to the CTO and completely own the design and development of this company’s backend. You will work with ML and Frontend Engineers to develop a performative and scalable, AI-integrated applications. Further responsibilities include:

• Leading the design and architecture of their backend
• Working with a team building at a high rate of speed where being able to operate autonomously is a must
• Open-source infrastructure
• Focusing on optimization, evaluation, observability, and integrations
• Dealing with massive amounts of data

SKILLS & REQUIREMENTS

• Extensive experience in Rust
• Experience working at a high rate of speed
• Backend design and development from 0-1
• Comfort working in an evolving, dynamic space where you’ll need to wear multiple hats.
• Must be able to work in their Brooklyn office 5 days a week

THE BENEFITS

As a Founding Backend Engineer, you will receive a base of up to $250,000 + SIGNIFICANT equity.

HOW TO APPLY

Please register your interest by sending your resume to Danny Macdonald via the Apply link on this page.

KEYWORDS

Backend Development, Software Engineer, Rust, Clickhouse, Docker, Kubernetes, AWS, GCP, PostgreS, Open-Source

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FULL STACK DEVELOPER
FINANCIAL SERVICES
NYC (HYBRID)
$120,000 – $130,000 + BONUS

THE COMPANY
We are partnering with an innovative financial lender that provides credit lines for consumer brands and investor groups. They operate with the agility of a VC-backed tech company. They built a proprietary loan service platform to power their entire operations, portfolio management, and client sourcing, helping them drive data-informed decisions.

THE ROLE – FULL STACK DEVELOPER
As a Full Stack Developer, you’ll join a small, collaborative team focused on maintaining and enhancing their platform. Reporting to the Director and Tech Lead, you’ll be responsible for both front-end and back-end development (50/50 split), bug fixes, and feature development. Key responsibilities include:

• Engaging in two-week sprint cycles
• Collaborating with heads of business departments to understand different areas of the company
• Proactively identifying and addressing platform issues to ensure reliability

SKILLS & EXPERIENCE

• Proficiency in Node.js and React
• Understanding of development processes, ideally with experience in PostgreSQL, Python microservices for machine learning/predictive modeling, and AWS
• Familiarity with machine learning is a plus but not required

BENEFITS
Base salary of $120,000 – $130,000 with a targeted bonus, plus comprehensive health, dental, and vision coverage.

HOW TO APPLY
Please register your interest by sending your resume to Malia Jalbert via the Apply link on this page.

KEYWORDS
Full Stack Developer, Node.js, React, PostgreSQL, Python, AWS, Machine Learning, Financial Services, Lending, Proprietary Platform, Full Stack Development, Hybrid, Remote Optional, Cloud

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FOUNDING BACKEND ENGINEER
TECHNOLOGY
BROOKLYN, NY (ON-SITE)
$200,000-$250,000 + EQUITY

THE COMPANY

We’re partnering with an early-stage startup focused on building open-source infrastructure to optimize LLM applications. Their innovative platform enables a feedback loop for improving production data, creating smarter, faster, and more cost-effective models. By unifying inference, observability, optimization, and experimentation, they empower cutting-edge workflows for complex multi-step LLM applications-all while maintaining blazing-fast performance.

THE ROLE – BACKEND ENGINEER

As the Founding Backend Engineer, you’ll build the backend and systems software from the ground up. This is a unique opportunity to own the entire backend architecture in Rust while collaborating directly with the two cofounders. Key responsibilities include:

• Design, build, and deploy the backend systems from scratch (0-1).
• Contribute to core features like optimization, evaluation, observability, and integrations.
• Develop scalable, high-performance systems to handle complex data workflows and programmatic interfaces.
• Collaborate with the cofounders to shape the architecture and technical vision.

SKILLS AND EXPERIENCE

• Proven experience as a tech lead for backend projects, particularly those built from scratch (0-1).
• Expertise in Rust or ClickHouse.
• Strong academic background, ideally from top institutions.
• Contributions to open-source projects are highly preferred.
• Familiarity with distributed systems, ML infrastructure, and database design is a plus.
• Nice to have: Experience with Kubernetes or other orchestration tools.
• Nice to have: Background in database development or optimization.

BENEFITS

This role offers a competitive base salary of $200,000 – $250,000, alongside significant equity.

HOW TO APPLY

Express your interest by sending your resume directly to Malia Jalbert via the application link below.

KEYWORDS

Backend Engineer, Founding Engineer, Rust, ClickHouse, Open Source, 0-1 Development, Distributed Systems, Database Development, ML Infrastructure, Kubernetes, Startups

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FOUNDING FRONTEND ENGINEER
TECHNOLOGY
BROOKLYN, NY (ON-SITE)
$200,000-$250,000 + EQUITY

THE COMPANY

We’re partnering with an early-stage startup focused on building open-source infrastructure to optimize LLM applications. Their innovative platform enables a feedback loop for improving production data, creating smarter, faster, and more cost-effective models. By unifying inference, observability, optimization, and experimentation, they empower cutting-edge workflows for complex multi-step LLM applications-all while maintaining blazing-fast performance.

THE ROLE – FOUNDING FRONTEND ENGINEER

As the Founding Frontend Engineer, you’ll build the platform from the ground up, focusing on optimization, evaluation, observability, and integrations. Key responsibilities include:

• Build new features and workflows from scratch (0-1) in React/TypeScript.
• Develop the frontend architecture for the platform, ensuring it’s optimized for scalability and performance.
• Collaborate closely with the cofounders to design and implement innovative solutions for complex AI-driven challenges.
• Tackle unique product design challenges related to massive data processing and programmatic interfaces.

SKILLS AND EXPERIENCE

• Proven experience building new features or systems from the ground up (0-1).
• Expertise in React and TypeScript.
• Experience in startup environments.
• Contributions to open-source projects are highly preferred.
• A portfolio of past work is a plus but not required.

• Familiarity with RemixJS, TailwindCSS, or product/UI design.
• Experience with Rust for backend development.

BENEFITS

This role offers a competitive base salary of $200,000 – $250,000, alongside significant equity.

HOW TO APPLY

Express your interest by sending your resume directly to Malia Jalbert via the application link below.

KEYWORDS

Frontend Engineer, Founding Engineer, React, TypeScript, Open Source, 0-1 Development, LLM Optimization, AI Workflows, Product Design, Programmatic Interfaces, RemixJS, TailwindCSS, Rust, Startups

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Founding Machine Learning Engineer

AI Start Up

Location: New York, NY (Onsite, 5 days/week)

Compensation: $170,000-$240,000 base + equity

Harnham is partnering with an early-stage startup that is developing an open-source platform designed to optimize large language model (LLM) applications. This platform integrates inference, observability, optimization, and experimentation to continuously enhance LLM performance, making models smarter, faster, and more efficient over time. Backed by leading investors and guided by a clear technical roadmap, this startup is laying the groundwork for the next generation of AI solutions.

Are you a seasoned ML professional ready to take on a pivotal role at a cutting-edge AI start-up? This is your opportunity to shape the future of a revolutionary platform and leave a lasting impact on the AI/ML landscape.

THE ROLE

This is an opportunity to join an emerging company at the frontier of ML engineering. As a founding member of the technical staff, you will take on a leading role in developing innovative ML solutions for optimizing LLMs, directly influencing the product and platform’s growth. You will work closely with the CEO and CTO to define the technical vision, contribute to open-source initiatives, and have a significant impact on shaping both the product and the future of the company.

RESPONSIBILITIES

• Design, implement, and optimize advanced ML solutions for large language models, focusing on reinforcement learning and other cutting-edge approaches.
• Build high-performance systems with sub-millisecond overhead to support LLM inference and observability pipelines.
• Translate academic research into practical solutions, including advanced techniques such as retrieval-augmented generation (RAG) and agent-based systems.
• Develop and integrate experimentation frameworks, including A/B testing, routing strategies, and model optimization.
• Work alongside the CTO and CEO to define the technical roadmap, contributing to both infrastructure and application development.
• Take ownership of the ML lifecycle from research and prototyping to production deployment.

YOUR SKILLS AND EXPERIENCE

• Commercial experience in machine learning engineering or research, particularly with large language models or reinforcement learning.
• Proven track record of tackling complex technical challenges and driving high-impact projects from concept to production.
• Deep understanding of optimization techniques for ML models.
• Experience with advanced inference strategies, model evaluation, and experimentation methodologies.
• Strong interest in growing your skill set and taking on new technical challenges across the stack.
• Ability to collaborate closely in an in-person, fast-paced team environment.

As a founding member of a technical team, you will have the opportunity to shape not only the product but also the company’s engineering culture, practices, and long-term vision. If you are passionate about pushing the boundaries of machine learning and want to work on the cutting edge of AI, apply.

HOW TO APPLY

Register your interest by sending your resume to Virginia using the Apply link

KEYWORDS

Machine Learning | ML | Large Language Model | LLM | Open-source | AI Optimization | Feedback loop | Reinforcement learning | Experimentation | Optimization strategy

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Director of Engineering
Tech
New York, NY (Hybrid)
$250,000 – $300,000 + Bonus

The Company

This innovative tech company is a leader in developing cutting-edge solutions, with a focus on delivering high-quality software products. As they continue to grow and scale, they are looking for a visionary Director of Engineering to lead their engineering team and drive strategic product development across multiple domains.

The Role

You will oversee all aspects of engineering management, including product development, technical leadership, and cross-functional collaboration across various business lines. In this role, you will work closely with senior leadership to drive engineering excellence and ensure alignment with business objectives. Additional responsibilities include:

• Lead a team of engineering managers and software engineers, providing strategic direction and fostering a culture of innovation and technical excellence.
• Oversee the end-to-end product development lifecycle, ensuring high-quality, scalable, and reliable software solutions are delivered on time and within budget.
• Work closely with Product Management, Design, and other key stakeholders to define product requirements, roadmaps, and deliverables.
• Ensure adherence to software development best practices, architecture standards, and agile methodologies to maximize team productivity and operational efficiency.
• Drive the adoption of new technologies and innovations within the engineering team, ensuring that products remain competitive and innovative.
• Collaborate with senior leadership to align engineering initiatives with overall company goals and objectives, fostering a collaborative and transparent work environment.
• Establish and maintain robust engineering processes, monitoring progress with key performance indicators (KPIs) to drive continuous improvement.
• Manage resources effectively, ensuring the optimal allocation of talent and technology to achieve engineering goals.
• Oversee the engineering budget, ensuring efficient use of resources and cost-effective delivery of engineering projects.

Your Skills & Experience

• Proven experience leading large, distributed teams and managing complex software development projects from inception to delivery.
• Expertise in software development methodologies (ex. Agile, DevOps) and a strong technical background in modern development tools and technologies (ex. Node.js, TypeScript, React).
• Strong leadership, communication, and problem-solving skills, with the ability to collaborate effectively with both technical and non-technical stakeholders.
• Experience in driving innovation and continuous improvement within engineering teams.

BENEFITS

Base salary of $250,000 – $300,000 + bonus and full benefits.

HOW TO APPLY

Please register your interest by sending your resume to Neha Nidamarti via the Apply link on this page.

KEYWORDS

Director of Engineering, Engineering Leadership, Product Development, Software Engineering, Agile, Node.js, React, DevOps, Team Management, Technical Leadership

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Founding Software Engineer (Backend)
AI Tech
New York, New York (Onsite)
$200,000 – $240,000 + Equity

The Company:

We’re partnering with a company that builds open-source infrastructure that creates a feedback loop for optimizing LLM applications. By integrating with their model gateway, you can send metrics to improve models over time-making them smarter, faster, and more cost-effective.

The Role:

As a Backend Engineer, you will be responsible for building the entire backend and systems software from scratch, directly working with the two co-founders. You’ll focus on optimizing system performance, evaluating and refining architecture, and implementing observability tools to ensure reliability. You’ll also handle key integrations, connecting backend systems with third-party services and APIs. Taking full ownership of the backend in Rust, you’ll leverage its performance and safety features to create a scalable, maintainable, and high-performing system. As one of the first technical hires, your work will have a direct impact on the company’s growth and technical direction.

Your Skills and Experience:

• Strong experience building backend systems from scratch with a high degree of ownership over technical direction and deliverables, ideally in a startup environment.
• Deep proficiency in Rust, including its use for building high-performance, scalable backend systems and services.
• Knowledge and experience in working with ClickHouse for data storage, processing, and optimization.
• Active contributions to open-source projects, demonstrating a collaborative mindset and technical expertise.
• Understanding of distributed systems concepts, architecture, and best practices for building highly scalable and fault-tolerant systems.
• Solid experience with relational or NoSQL databases, and performance optimization techniques in backend systems.
• Strong ability to integrate backend systems with other services, APIs, and third-party tools.
• Understanding or experience with infrastructure for deploying and scaling machine learning models in production.
• Familiarity with container orchestration and deployment using Kubernetes for scalable backend infrastructure.
• Ability to work closely with co-founders, providing input on architectural decisions and contributing to strategic technical initiatives.

The Benefits:

A base salary between $200,000 – $240,000 + Equity and comprehensive health, dental, vision, and 401k benefits

How to Apply:

Please register your interest by sending your resume to Neha Nidamarti via the Apply link on this page.

Key Words:

NoSQL, Kubernetes, Rust, ClickHouse, Backend Engineer, Software Engineer, Distributed Systems, Open Source, Startup

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Founding Software Engineer (Frontend)
AI Tech
New York, New York (Onsite)
$200,000 – $240,000 + Equity

The Company:

We’re partnering with a company that builds open-source infrastructure that creates a feedback loop for optimizing LLM applications. By integrating with their model gateway, you can send metrics to improve models over time-making them smarter, faster, and more cost-effective.

The Role:

As a Founding Frontend Engineer, you will play a key role in building the platform from the ground up, taking it from 0 to 1. You’ll focus on creating a high-performance, user-friendly interface while contributing to core areas like optimization, evaluation, observability, and integrations. Working directly with the two cofounders, you’ll own the entire frontend architecture and development process using React and TypeScript. In this highly collaborative, early-stage environment, you’ll have the opportunity to shape the product’s direction, design scalable solutions, and build a seamless user experience. This is a unique chance to have a direct impact on the company’s growth and the product’s success from day one.

Your Skills and Experience:

• Strong experience with React and TypeScript
• Proven ability to design and implement frontend architecture from scratch in an early-stage environment.
• Expertise in creating user-friendly, responsive interfaces with a focus on performance and scalability.
• Strong understanding of integrating with backend systems and APIs.
• Ability to work closely with cofounders and cross-functional teams to shape the product’s direction and create innovative solutions.
• Familiarity with RemixJS for building modern, fast, and scalable web applications and Tailwind CSS for utility-first design and styling. (Nice to have)
• Experience working in startup environments, with the ability to adapt quickly to changing priorities and demands.
• Passion for continuous learning and staying up to date with the latest frontend technologies and best practices.

The Benefits:

A base salary between $200,000 – $240,000 + Equity and comprehensive health, dental, vision, and 401k benefits

How to Apply:

Please register your interest by sending your resume to Neha Nidamarti via the Apply link on this page.

Key Words:

React, Typescript, Tailwind, API, Frontend Engineer, Software Engineer, RemixJS, UI, Startup, CSS

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DIRECTOR OF SOFTWARE ENGINEERING
TECHNOLOGY
NEW YORK, NY
$250,000 – $300,000 + BONUS

THE COMPANY
This established leader in the software industry is seeking a Director of Software Engineering to lead their development teams through the next phase of innovation. With a focus on modernizing platforms, improving scalability, and driving engineering excellence, this role will shape the future of their software solutions.

THE ROLE – Director of Software Engineering
This role oversees software development across multiple teams, driving best practices in architecture, development, and deployment. You will collaborate closely with product leaders to align technology with business goals while managing and mentoring top engineering talent. Key responsibilities include:

• Lead the development of scalable, high-performance systems using technologies like Java, Python, JavaScript (React, Node.js), and C++.
• Drive cloud migration initiatives, leveraging AWS services such as EC2, S3, and Lambda.
• Oversee CI/CD pipelines, ensuring fast and reliable delivery with tools like Jenkins, GitLab CI, and Docker.
• Design and implement modern microservices architectures, optimizing for scalability and resilience.
• Collaborate with DevOps teams to maintain efficient Kubernetes-based container orchestration.
• Foster a culture of testing and quality assurance, utilizing tools like JUnit, Selenium, and Postman.
• Mentor engineering managers and senior developers, building strong, collaborative teams.
• Partner with product teams to prioritize and deliver high-impact features aligned with customer needs.

SKILLS & EXPERIENCE

• Bachelor’s or Master’s in Computer Science, Software Engineering, or a related field.
• 8+ years of software development experience, with 3+ years leading engineering teams.
• Proven success managing teams working on cloud-native applications and modern tech stacks.
• Expertise in software architecture, design patterns, and performance optimization.
• Strong track record of delivering projects on time while maintaining high-quality standards.
• Experience with Agile methodologies and tools like JIRA.

BENEFITS
Base salary up to $300,000 + bonus and comprehensive benefits.

HOW TO APPLY
Send your resume to Malia Jalbert via the Apply link on this page.

KEYWORDS
Director of Software Engineering, Software Development, Java, Python, JavaScript, React, Node.js, C++, AWS, Cloud, Microservices, DevOps, Kubernetes, Docker, CI/CD, Jenkins, GitLab CI, Agile, Software Architecture, Leadership, Engineering Management

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Senior Software Engineer (Fullstack)

Technology

United States

$170,000-$190,000 + Equity

About Us:

This company we are working with aims to transform technology with their Gen AI platform that directly helps businesses excel with a virtual assistant handling any sort of problem in seconds. They are looking for a fullstack focused software engineer to help improve their product and continue to build new state-of-the-art features.

Role Description:

As a Senior Software Engineer, you are adept at architecting intricate distributed systems, exemplified by their API handling tens of thousands of requests per second. You also excel in constructing data pipelines feeding our state-of-the-art neural networks, indexing millions of images. Your ability to swiftly adapt to new technologies is matched by your pride in crafting solutions that pave the way for the future of contextual interactivity.

• Deliver high-quality code with a direct impact on the business’s bottom line.
• Model complex problems and design large-scale distributed systems.
• Create stable and efficient APIs for both internal and client-facing products.
• Contribute to shaping the long-term vision of our technology and products.

Requirements:

• Proficient in JavaScript, Typescript and React
• Extensive experience deploying at a massive scale in cloud environments such as AWS, Azure, or GCP.
• Strong experience with Node.js
• In-depth knowledge of relational databases like MySQL or PostgreSQL.
• Demonstrated experience collaborating closely with engineering, product, and design stakeholders.
• Experience working at a start up

The Benefits:

As a Senior Software Engineer, you will receive a $170,000- $190,000 base. This role also includes equity, 401k, health, dental, and vision care.

How to Apply:

Please register your interest by sending your resume to Jacob Bisson via the Apply link on this page.

Key Words:

Typescript, JavaScript, AWS, GCP, Snowflake, Docker, Kubernetes, React, MySQL, PostgreSQL, Start up, Distributed Systems, APIs, Software Engineering

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Founding Engineer

Technology

New York City (On-Site)

$210,000-$230,000 + Equity

The Company:

This company is a dynamic startup revolutionizing the accounting industry with cutting-edge AI technology. They are committed to simplifying financial management for businesses through innovative solutions. Their team consists of passionate individuals driven by the mission to transform the way businesses handle their finances.

The Role:

• As a Founding Engineer, you are responsible for spearheading the development of our AI-driven accounting platform from the ground up. You excel in architecting intricate systems and crafting solutions that pave the way for the future of financial technology. Other responsibilities include:
• the design, development, and implementation of our AI-driven accounting platform using Python.
• closely with cross-functional teams to translate business requirements into technical specifications and architectural designs.
• scalable, efficient, and maintainable codebase adhering to industry best practices.
• innovation by researching and integrating emerging technologies to enhance product capabilities.
• coding standards, development processes, and quality assurance procedures.
• junior engineers, fostering a culture of learning and continuous improvement.
• ownership of project timelines, ensuring timely delivery of milestones and objectives.
• identify and address technical challenges and bottlenecks to ensure smooth project execution.

Requirements:

• in Python with extensive experience in building projects from scratch.
• experience working in startup environments, preferably as a founding engineer or early-stage employee.
• knowledge of software development methodologies, tools, and processes.
• with AI/machine learning technologies and frameworks is a plus.
• communication skills with the ability to articulate complex technical concepts to non-technical stakeholders.

The Benefits:

As a Founding Engineer, you will receive a $210,000-$230,000 base salary. This role also includes equity, 401k, health, dental, and vision care.

How to Apply:

Please register your interest by sending your resume to Jacob Bisson via the Apply link on this page.

Key Words:

Python, Start up, AI, Machine Learning, Software Engineering, Financial Technology, Data Engineer

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