Backend Developer Jobs in 2026

About SpruceID

SpruceID builds privacy-preserving, standards-based digital identity and credentialing solutions that give individuals control of their information while enabling governments and enterprises to deliver secure, interoperable services. We partner with public-sector organizations to mod...

About Tailor

Tailor is pioneering Headless ERP technology — a new way for growing companies to design internal workflows that fit their business, not the other way around. Our platform combines the flexibility of modern developer tools with the power of enterprise-grade operations.

We’re helpi...

About us:

Keragon is a HIPAA-compliant, no-code automation platform revolutionizing healthcare operations. We empower healthcare organizations to seamlessly connect diverse systems and automate tasks like appointment scheduling, patient intake, and billing—eliminating the need for coding. Backed by...

Substack is building a new economic engine for culture, giving the brightest, most interesting, and most creative people on the internet the power of their own publishing platform. The terms of our culture should not be set by gate-keeping legacy media or chaos-fueling social media, but by the peopl...

RevenueBase:

• We're building the data infrastructure that makes AI agents trustworthy instead of error-prone.
• We provide continuously refreshed, verified B2B data for autonomous AI agents and GTM workflows.
• We've tripled growth while maintaining 100% gross dollar retention and staying ca...

Who We Are

Our mission is to make the world programmable. Sight is one of the key ways we understand the world, and soon this will be true for the software we use, too.

We’re building the tools, community, and resources needed to make the world programmable with artificial intelligence. Roboflo...

About Playlab

Playlab is a tech non-profit dedicated to helping educators and students become critical consumers and creators of AI.

We believe that an open-source, community-driven approach is key to harnessing the potential of AI in education. We equip communities with AI tools and hands-on p...

Updated: 03 April 2026

Freelance | 8–20 hrs/week | Remote (EU/UK)

Are you an experienced machine learning engineer who instinctively spots gaps in AI reasoning and understands the complex realities of ML practice? Do you have 8 to 20 hours per week available alongside your main job or consulting p...

You will collaborate with researchers to perform research operations using existing infrastructure. You will use your judgment in complex scenarios and help apply standard techniques to a wide variety of technical problems. Specifically, you will:

• Characterize neural network quality, failure mode...

Full-time | Remote

Introduction:

• Join us at Fastino as we build the next generation of LLMs. Our team, boasting alumni from Google Research, Apple, Stanford, and Cambridge is on a mission to develop specialized, efficient AI.
• Fastino's GLiNER family of open source models has been downloaded mo...