Backend Jobs in United States

Staff Backend Engineer, Offerwall

North AmericaStaff

Distributed Systems Go gRPC Machine Learning Observability +1 skills

Staff engineer role leading the architecture of Offer Delivery, the backend that decides which rewarded ad offers players see in Unity/ironSource's Offerwall. Day to day: designing and operating high-throughput, latency-sensitive Go services for real-time bidding (OpenRTB/DSP) and direct offer placement, plus mentoring engineers and participating in on-call.

Staff Backend Engineer, ML Inference Systems

North AmericaStaff

AI CI/CD Cloud Containerization DevOps +12 skills

Staff backend engineer on ironSource/Unity's Vector Gamer AI team, building and operating the distributed, low-latency inference infrastructure behind billions of daily ad ranking and bidding decisions. Core stack: Golang, GCP, Kubernetes, Prometheus, and Grafana.

Senior Backend Engineer – Hybrid, Scalable APIs & Data

AI API Api Design Machine Learning

Senior full-stack engineer at Thomson Reuters Noetica building scalable backend services, APIs, and data processing for a document analysis platform, focusing on server-side architecture and API design while collaborating with AI/ML PhDs and contributing frontend features as needed.

Talentify

Hybrid Senior Java Backend Engineer | Docker & Kubernetes

Angular CI/CD Docker Java Kubernetes +2 skills

Perfict Global is seeking a Senior Java Backend Developer to design and build scalable web applications with Java, SQL, and microservices in a hybrid SF Bay Area environment. Core stack includes Docker, Kubernetes, CI/CD, and Angular 9+ (team uses Angular 13).

Talentify

Senior Backend Engineer - Java, Spring & REST APIs

Agile API Hibernate Java JPA +6 skills

Talentify is hiring a Senior Backend Engineer in New York to build production-grade Java applications: modular, scalable services, RESTful APIs, and background jobs. The core stack is Java with Spring and JPA/Hibernate, using TDD with JUnit/Mockito, working in Agile/Scrum teams on system design, code reviews, and mentoring.

Matcha

Senior Backend Engineer: Scale Robust APIs with TypeScript

A senior backend engineer owns features end-to-end from design to deployment, building scalable, reliable APIs and services in TypeScript while also contributing to the frontend in a fast-paced startup health environment, collaborating closely with product and design.

Talentify

Java Backend Developer

North America

AI Angular API Automation AWS +14 skills

Contract Java backend developer (15-16 months) in McLean, VA, splitting time between coding, code enhancement, and production/non-production troubleshooting. Primary stack is Java with Python or other scripting, testing and SDLC, plus CI/CD via Jenkins; AWS, React/Angular, and Gen AI tools (Kiro, Amazon Queue) are pluses.

Booz Allen Hamilton

Senior Multi-Cloud Backend Engineer (Golang)

API AWS Azure Cloud Data Pipelines +4 skills

Senior backend engineer at Booz Allen Hamilton in Charlottesville, VA building mission-ready Go services, APIs, and data pipelines for government clients, deploying across Azure, AWS, and GCP with Terraform and Kubernetes. A DoD 8570/8140 IAT II certification is required within 30 days.

Cisco Systems, Inc.

Software Engineer, Backend - Webex Signaling

North AmericaFull-time

AI Analytics API Api Design Cassandra +18 skills

Backend engineer on Cisco's Webex Signaling team in Seattle, building and operating cloud-native Java microservices (Spring Boot, Kubernetes) that power calling, meetings, and collaboration features. The role emphasizes DevOps, telemetry/observability, large-scale distributed systems, and AI-assisted software development.

Senior Software Engineer, Backend (Node.js, TypeScript, Rust)

North AmericaContractSenior

Accessibility AI Analytics API CI/CD +7 skills

Senior backend engineer building high-scale consumer platform services for a large enterprise client, coding in Node.js, TypeScript, and Rust with REST/GraphQL APIs and CI/CD, including integrating generative AI into production services. Hired as a W-2 employee of staffing firm Cincinnatus LLC; full-time, US-based, 40 hrs/week.

re-zoo-me

RemoteNorth AmericaSenior

Senior Backend Software Engineer (Java/Node.JS)

API AWS CI/CD Cloud Cloud Native +21 skills

Fully remote senior backend engineer designing and maintaining REST APIs and distributed microservices in Java (Spring Boot) and Node.js, deployed on AWS via Kubernetes/EKS with Terraform and CI/CD, for a consulting firm modernizing ad revenue systems (programmatic, AVOD/FAST, CTV) for advertising clients.

Backend Software Engineer - AI Trainer

North AmericaContract

AI C++ C# DevOps Java +7 skills

Independent-contractor side work for software engineers: you design and solve coding problems, build coding environments and unit tests, and review/debug AI-generated code to help train AI models. Fully remote with a flexible schedule; hourly pay starts at $50-$100+/hr using languages like Python, JavaScript, Java, C++, or Go.

Remote Backend Engineer for AI Coding Projects

RemoteNorth AmericaContract

AI DevOps Machine Learning

Independent contractor role at DataAnnotation: software engineers choose AI coding projects - building applications, debugging, and analyzing/visualizing data - on a flexible remote schedule, paid hourly via PayPal starting at $50-$100+ per hour.

Backend Engineer II: C++/Rust for High-Scale Ad Tech

HybridNorth America

Magnite is hiring a Software Engineer II for its DV+ Delivery Engineering team to build and maintain a globally distributed, high-performance ad serving system. Day to day involves turning business needs into technical designs and delivering services in C++17/20 or Rust with a focus on memory management and concurrency, in a hybrid model from Broomfield, CO.

Guardian Service Holdings LLC

AI-Native Backend Engineer — Rapid Tooling & Automation

North America

Guardian Service Holdings is hiring an AI-native backend engineer in Raleigh to prototype and deploy internal tools that automate workflows across CRM, email, telephony, and operations. The engineer works directly with business teams to ship solutions in days and owns deployment and scaling of these AI-enabled tools company-wide.

EvenUp Inc

New Grad Backend Engineer, AI & Document Processing

North AmericaJunior

EvenUp is hiring a new grad backend engineer in San Francisco to join its AI Entities team, building services that process large volumes of documents to power AI-driven experiences. The role spans the full lifecycle — design, testing, deployment, and iteration — alongside engineers, data scientists, and ML experts.

Senior Backend Engineer — Payments & VAT (Remote)

Senior backend engineer on Printify's Payments sub-team for a 6-month assignment, building backend systems for tax calculations, VAT processing, invoicing, and audit readiness while partnering with accounting and finance stakeholders. Hybrid remote work with the Riga office is available.

Veterans EZ Info Inc

Remote Backend Engineer — Secure Gov Healthcare APIs

RemoteNorth America

Agile API CI/CD Cloud DevSecOps +4 skills

VetsEZ is hiring a fully remote Backend Engineer to build and maintain secure, scalable backend services, RESTful APIs, and enterprise integrations for a large federal government healthcare modernization project. Core stack: Java, Spring Boot, SQL, cloud platforms, and CI/CD within an Agile team.

Veterans EZ Info Inc

Backend Engineer (Remote Opportunity)

RemoteNorth America

Agile API Authentication Automation AWS +12 skills

Backend engineer building secure, scalable Java/Spring Boot services, RESTful APIs, and enterprise integrations (SQL, Git, CI/CD, cloud) for a 100% remote federal government healthcare modernization project. Requires US citizenship, 5+ years backend experience, and ability to obtain a Public Trust clearance.

Lever, Inc.

Senior ML Infra Backend Engineer - Remote + Stock Options

AI Data Pipelines Machine Learning

Lever, Inc. is hiring a Senior Backend Engineer for Machine Learning Infrastructure to own high-load backend services and ML data pipelines, partnering with ML and product teams to deliver reliable, scalable infrastructure for ML workloads in a remote-first environment (working from Spain).