Backend Engineer Jobs - June 2026

Air Space Intelligence is hiring in Boston. The company is a frontier AI and product company for critical industries and defense, backed by a16z. They are rebuilding America’s air traffic control system from scratch, focusing on a large real-time optimization…

Woosmap runs location APIs including geocoding, routing, store locator, and address autocomplete at enterprise scale. When a checkout page resolves your address or a courier finds you, that’s provided by the company. Small team owning and driving complex solu…

At Gigs, we are building the operating system for mobile services - a platform that enables tech companies to seamlessly embed connectivity into their products. Klarna Mobile, OnePay Wireless and Revolut Mobile are powered by Gigs. We are looking for exceptio…

Repeat founder building something new and putting together a founding team. High ownership; ideally candidates with prior startup experience or previous founder/founding team experience. Open roles include Full-Stack/Frontend/AI Engineer, Backend Engineer, De…

ThreatMark protects >50M end users from financial fraud and saves > $100M every year in losses. The company works with top banks in the EU and US. Responsibilities include developing large-behavioral models that recognize returning users using mouse movements…

Mitte is an AI creative suite with a built-in media agent. Founded by an ex-Superhuman lead engineer. Lean startup and unix philosophy; they ship every day and focus on systems design and thoughtful patterns before scaling. Hiring Backend Engineer (Elixir, Go…