Full-Time
Software Engineering Manager
Posted on 8/15/2025
Union.ai
51-200 employees
Managed platform for ML workflow orchestration
Compensation Overview
$175k - $230k/yr
Seattle, WA, USA + 4 more
More locations: San Francisco, CA, USA | San Jose, CA, USA | Oakland, CA, USA | Bellevue, WA, USA
Remote
 Software Engineering (1) |
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- 10+ years of professional experience building, designing and implementing services and solutions to streamline delivery, installation, and orchestration of data and services in a large-scale AI/ML platform based on the Flyte orchestration framework
- 3-4 years of professional experience leading, managing, growing and coaching a team of engineers
- deep passion for all things Kubernetes and the broader container orchestration ecosystem
- hands-on experience with backend programming languages (Go, Rust, Python)
- ability to navigate and pick up new technologies quickly
- ability to own complex projects from planning to completion
- in-office presence as a requirement
- Design and build distributed systems backend services (APIs, Kubernetes controllers, etc) and client components to install, manage, and observe Union services in a Kubernetes native environment
- Lead, mentor, and foster the professional growth of a high-performing, collaborative engineering team through effective coaching and guidance
- Design, implement, and optimize distribution strategies to facilitate simple and intuitive management of a complex platform in customer controlled environments
- Work across multiple cloud vendors including AWS, GCP, Azure, and OCI as well as neo-cloud providers
- Develop and maintain services and tooling to make our systems more reliable, secure, and performant
- Contribute to architectural decisions and participate in code and design reviews across various teams, ensuring the highest standards of quality and performance
- Work closely with broader teams including Backend, Frontend, and Support to improve the experience for our customers
- Frontend expertise is a bonus
- You will be expected to be in-office
- General understanding of building modern web applications using Next.js, React, and Typescript
Union.ai provides a managed platform for machine learning and data pipeline orchestration. Its flagship Flyte product runs scalable ML and data workflows, while Union Cloud offers a turnkey, managed deployment that abstracts away infrastructure so ML engineers and data scientists can focus on modeling and data tasks. The platform handles large, complex workflows—covering thousands of pipelines and extensive CPU resources—by executing Python-based workflows in an optimized environment. Union.ai differentiates itself by delivering a fully managed service that reduces the need for in-house ops, maintenance, and scaling, letting customers deploy and manage ML workloads with less overhead. The company's goal is to help organizations accelerate ML projects, shorten time-to-production, and lower technical debt by providing a reliable, scalable, subscription-based ML orchestration platform.
Company Size
51-200
Company Stage
Series A
Total Funding
$48.1M
Headquarters
Bellevue, Washington
Founded
2021
Simplify's Take
What believers are saying
- 3X revenue growth in 2025 and 2.6X customer expansion signal strong commercial momentum and market demand.
- Series A funding from NEA, Mozilla Ventures, and Nava Ventures accelerates product development and go-to-market.
- Pandera framework with 100M+ downloads expands ecosystem moat for data validation in ML pipelines.
What critics are saying
- Temporal's $300M funding enables aggressive competition in durable execution, directly threatening Flyte's crash-resilience differentiation.
- Open-source Flyte adoption enables self-hosting, eroding Union Cloud SaaS revenue as enterprises avoid managed services.
- Kubeflow and GPU-integrated competitors like Tecton poach customers seeking tighter inference and training integration.
What makes Union.ai unique
- Flyte 2 enables dynamic, crash-resilient AI workflows with pure Python authoring and runtime decision-making.
- 80M+ Flyte downloads across 3,500+ companies including Spotify, Lyft, and Carfax demonstrate market leadership.
- Union 2.0 delivers 10-100x greater scale, speed, and parallelism versus open-source Flyte with enterprise SLAs.
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Benefits
Health Insurance
Dental Insurance
Vision Insurance
Stock Options
Unlimited Paid Time Off
401(k) Company Match
401(k) Retirement Plan
Parental Leave
Flexible Work Hours
Growth & Insights and Company News
6 month growth
↑ 5%1 year growth
↑ 1%2 year growth
↑ 5%Seattle-area startup Union.ai raises $19M to fuel AI workflow platform. by Taylor Soper on Feb 25, 2026 at 8:57 am Bellevue, Wash.-based startup Union.ai announced that it closed a $38.1 million Series A round, led by NEA, with participation from Nava Ventures and new investor Mozilla Ventures. The total includes a previously announced $19.1 million portion raised in 2023. Union is the company behind Flyte, an open-source orchestration tool used to run complex machine learning and data workflows. Union is positioning itself as broader "AI development infrastructure" - covering orchestration as well as pieces such as training, inference, and observability - aimed at helping engineering teams move from experimentation to production faster. "Building AI requires a fundamentally different approach than traditional software, and engineering teams are now embracing that," CEO Ketan Umare said in a statement. This funding comes at an inflection point for AI: engineering teams are discovering that legacy software infrastructure and devtools struggle to handle AI development. They were designed for basic and deterministic processes of traditional data workflows, not for the non-deterministic processes of AI workflows, which expect agents to adapt and recover from failure at runtime. Union.ai is building the new category of AI development infrastructure. Engineering teams can develop dynamic, durable AI workflows and agents while dramatically reducing time spent maintaining brittle pipelines. The startup says revenue grew 3X in 2025, and its customer base expanded 2.6X. Union's customers include Spotify, HederaDx, Carfax, Hopper, and others. The company says the round supports the commercial launch of Union 2.0 and continued development of Flyte 2, including "pure Python" authoring, improved debugging, runtime decision-making, and crash-resilient workflows. Umare helped develop the underlying technology for Flyte while he was an engineer at Lyft. He previously worked at Amazon and Oracle. He co-founded Union.ai in 2020 with Haytham Abuelfutuh. The company has more than 40 employees and is actively hiring. Investors are backing various startups building behind-the-scenes infrastructure to help companies turn AI prototypes into reliable products. Temporal, a "durable execution" company rooted in the Seattle region, announced a $300 million round last week.
New Enterprise Associates leads $38.1 million Series A in Union.ai to power a new era of AI development infrastructure. February 25, 2026 Union.ai today announced it has completed its $38.1 million Series A funding round, led by New Enterprise Associates (NEA), with participation from Nava Ventures and new investor Mozilla Ventures. The total includes the previously announced $19.1 million and supports Union.ai's mission to build AI development infrastructure that enables engineering teams to move from experiment to production and scale faster. "This round came together as demand for AI orchestration is surging, and our open-source work is translating into clear commercial momentum," said Ketan Umare, CEO and Co-Founder of Union.ai. "Building AI requires a fundamentally different approach than traditional software, and engineering teams are now embracing that. This funding helps us move faster to define the core of that new approach: AI development infrastructure." Founded in 2020 as the enterprise platform for Flyte, the popular open-source AI orchestrator, Union.ai has evolved into an end-to-end AI development platform spanning orchestration, model training, inference, and observability. The company will use the new capital to accelerate product development, expand its engineering and field teams, and deepen investment in its open-source community. "Throughout these early innings of the AI era, we've witnessed a persistent challenge with the productization of AI solutions," said Scott Sandell, Executive Chairman and Chief Investment Officer at NEA. "We believe Union.ai stands out because it's delivering a platform built for that reality, helping engineers develop and deploy AI products in a practical, scalable way." Union.ai's continued commitment to open source - including the recent release of Flyte 2 AI orchestration - was also a key factor in Mozilla Ventures' participation, aligned with its open-source AI strategy. "Mozilla's open-source AI strategy is rooted in the belief that openness, choice, and developer agency are essential as we define the new AI tech stack," said Mohamed Nanabhay, Managing Partner at Mozilla Ventures. "We see a shared purpose with Union.ai in building an open software infrastructure for AI development." Engineering teams are discovering that legacy software infrastructure and devtools struggle to support AI development. Traditional workflow tools were designed for deterministic data processes, not the non-deterministic, adaptive workflows required for modern AI systems. Union.ai addresses this gap by defining the new category of AI development infrastructure. The platform enables teams to build dynamic, durable AI workflows and agents while reducing time spent maintaining brittle pipelines and increasing developer velocity. The Series A funding supports the next evolution of Flyte and Union.ai, designed to eliminate common engineering bottlenecks and simplify AI productionization. Key updates include: * Pure Python authoring: Write, test, and version workflows locally in pure Python, then run them at scale in the cloud. * Enhanced debugging: Live remote debugging and failure logs to accelerate shipping quality workflows. * Dynamic runtime decision-making: Fully dynamic workflows for agentic AI applications, while supporting traditional DAGs. * Scalable, long-running workflows: Large task fanout and parallelism, infrastructure provisioning on demand, and automatic execution versioning. * Crash-resilient pipelines: Resume workflows after failure with built-in caching and automatic retries. Union.ai continues to expand its open-source leadership with the release of Flyte 2, the next generation of its widely adopted AI orchestration tool, which has surpassed 80 million downloads. The company's open-source portfolio also includes Pandera, the data testing and validation framework with over 100 million downloads. Today, more than 3,500 companies use AI development infrastructure powered by Union.ai.
The funding round backs the commercial launch of Union 2.0 and the company’s leadership in open-source AI orchestration
Union.ai has completed a $38.1 million Series A funding round led by existing investor NEA, with participation from Nava Ventures and new backer Mozilla Ventures. The round includes a previously announced $19.1 million. Founded in 2020, Union.ai provides AI development infrastructure built on Flyte, its open-source AI orchestrator with over 80 million downloads. The platform helps engineering teams orchestrate workflows, model training, inference and observability, addressing challenges legacy software tools face with AI's non-deterministic processes. The funding will accelerate product development, expand engineering and field teams, and deepen investment in the open-source community. Union.ai recently released Flyte 2, featuring pure Python authoring, enhanced debugging and dynamic runtime decision-making for agentic AI applications. Over 3,500 companies currently use its infrastructure.
Union.ai completes $38.1 million Series A to power a new era of AI development infrastructure. The funding round backs the commercial launch of Union 2.0 and the company's leadership in open-source AI orchestration. February 25, 2026 09:00 ET | Source: Union.ai BELLEVUE, Wash., Feb. 25, 2026 (GLOBE NEWSWIRE) - Union.ai today announced it has completed its Series A funding round, raising a total of $38.1 million, including the previously announced $19.1 million. Led by existing investor, NEA, with participation from Nava Ventures, and welcoming new investor, Mozilla Ventures, the funding supports Union's mission to build AI development infrastructure that helps engineering teams move from experiment to production and scale faster. "This round came together as demand for AI orchestration is surging, and our open-source work is translating into clear commercial momentum," said Ketan Umare, CEO and Co-Founder of Union.ai. "Building AI requires a fundamentally different approach than traditional software, and engineering teams are now embracing that. This funding helps us move faster to define the core of that new approach: AI development infrastructure." Backing for the next chapter of Union.ai Union.ai was founded in 2020 as the enterprise platform for Flyte, the popular open-source AI orchestrator, and has grown into an end-to-end AI development platform for orchestration, model training, inference, and observability. Union.ai will leverage the new capital to accelerate product development, expand its engineering and field teams, and deepen investment in its open-source community. "Throughout these early innings of the AI era, we've witnessed a persistent challenge with the productization of AI solutions," said Scott Sandell, Executive Chairman and Chief Investment Officer, NEA. "We believe Union.ai stands out because it's delivering a platform built for that reality, helping engineers develop and deploy AI products in a practical, scalable way." Union.ai's continued commitment to open source, including its recent release of Flyte 2 AI orchestration, was a key reason for participation from Mozilla Ventures, who shares a common vision in its open-source AI strategy. "Mozilla's open-source AI strategy is rooted in the belief that openness, choice, and developer agency are essential as we define the new AI tech stack," said Mohamed Nanabhay, Managing Partner at Mozilla Ventures. "We see a shared purpose with Union.ai in building an open software infrastructure for AI development." Why companies need AI development infrastructure Today's engineering teams are discovering that legacy software infrastructure and devtools struggle to handle AI development. These workflow tools were designed for basic and deterministic processes of traditional data workflows, not for the non-deterministic processes of AI workflows, which allow them to adapt and make decisions at runtime. Union.ai solves this gap by leading the new category of AI development infrastructure. Engineering teams can build dynamic, durable AI workflows and agents while dramatically reducing time spent maintaining brittle pipelines and boosting developer velocity. Introducing Flyte and Union 2.0 This funding round supports the next evolution of Flyte and Union.ai, solving for new day-to-day engineering bottlenecks and making it easier to productionize AI. Key updates include: * Pure Python authoring: Allows engineering teams to easily write, test, and version workflows locally in pure Python, then run them at scale in the cloud. * Enhanced debugging: Live remote debugging and failure logs make it easier to ship quality workflows. * Dynamic, runtime decision-making: Delivers fully dynamic workflows for agentic AI applications, while still supporting traditional DAGs. * Scalable, long-running workflows: Enables large task fanout and parallelism, provisions infrastructure only when needed, and automatically versions executions. * Crash-resilient pipelines: Ensures workflows resume after failure instead of requiring a total restart, with built-in caching and automatic retries. Union.ai continues to deepen its commitment to open source with the release of Flyte 2, the next generation of the widely adopted AI orchestration tool, with over 80 million downloads. Union.ai's open-source portfolio also includes Pandera, the data testing and validation framework with over 100 million downloads. Today, more than 3,500 companies use AI development infrastructure powered by Union.ai. About Union.ai Union.ai is the AI development platform to orchestrate and ship mission-critical AI and agentic systems. By unifying data, models, and compute, Union.ai provides the development layer of the modern AI stack, accelerating engineering teams from experiment to production-ready AI systems. Union.ai is also the creator of Flyte, the industry's leading open-source AI orchestrator. Learn more at www.union.ai.