Backend Jobs in United States

Open 120d North AmericaContract

Backend Engineering Specialist - Freelance AI Trainer Project

AI API Api Design Cloud Containerization +11 skills

A contract backend engineer evaluates and refines AI-generated code for correctness, efficiency, and scalability, using Python, Java, Go, or C++ and related frameworks and databases.

Backend Engineer - Node.js - Senior

New RemoteNorth AmericaFull-timeSenior

API Authentication BDD CI/CD Cloud +17 skills

This is a remote position. We are looking for a highly experienced and visionary Senior Backend Developer to join Spark Eighteen in a full-time capacity. In this strategic role, you will lead the design and…

IO Tech Solutions Limited

New RemoteNorth AmericaSenior

Senior Backend Engineer (Node.js, Typescript)

AI API Automation AWS Azure +23 skills

Senior backend engineer building and maintaining scalable, secure back-end services, APIs, and data systems for web and mobile apps on a new product initiative. Core stack: Node.js/TypeScript (NestJS/Express), microservices, event-driven systems, SQL/NoSQL, cloud, Docker/Kubernetes, and messaging/caching.

Bluestorm Recruitment by Dazzle

Open 104d RemoteNorth America

Back End Engineer (Fully remote / Europe / CET)

API AWS Azure Cloud Docker +7 skills

Backend engineer building a greenfield iGaming product from scratch on a fully remote European (CET) team, working directly with the founder in a startup environment. Core stack: TypeScript, REST/GraphQL APIs, and SQL databases, with clean, well-tested code.

Hivex

Backend Developer (NestJS)

New RemoteNorth America

JavaScript MySQL NestJS PostgreSQL RabbitMQ +1 skills

Hivex is hiring a remote Backend Developer to build backend services using NestJS, TypeScript/JavaScript, RabbitMQ, and SQL databases (Postgres/MySQL). The role is fully remote with a flexible schedule and an emphasis on professional growth.

Matlen Silver

Back End Developer

New HybridNorth America

Senior Java backend developer on an 18-24 month W2 contract, designing and optimizing high-performance backend services for a mission-critical Prime Brokerage reporting platform that generates ~200,000 and distributes up to 1 million reports daily. Hybrid role with at least 3 days onsite per week.

Web Back End Developer

New North America

FUSTIS LLC seeks a Web Back End Developer for a 12-month onsite contract in Alexandria, VA, to design, build, test, integrate, and deploy backend components supporting a website modernization initiative and a Mobile App 2.0. W2 only; US citizens and green card holders; local candidates only.

Agility Partners

Java Backend Services Developer

New North America

API AWS Cloud Cloud Native Event Driven Architecture +7 skills

Senior Java developer designing, building, and maintaining scalable enterprise backend applications using Java, Spring Boot, microservices, and event-driven architecture, deployed on AWS with Terraform. The role spans the full SDLC, RESTful API development, code reviews, documentation, and architecture contributions.

Sniffies

New RemoteNorth AmericaSenior

Senior Backend Engineer

Analytics Android Angular API AWS +14 skills

Senior Backend Engineer at Sniffies, a location-based social web app for gay, bi, and curious men. You own backend features end-to-end (APIs, data models, background jobs, real-time messaging) on Node.js, TypeScript, AWS, and MongoDB, helping roll out ScyllaDB for a platform with ~3M monthly users and 20M messages/day.

152K – 170K $

Envision Technology Solutions

New North AmericaContractSenior

Senior Java Backend Developer (9+ Years) -- Berkeley Heights, NJ/Omaha, NE

Agile API Bitbucket Git GitHub +15 skills

Long-term contract role for a senior (9+ years) Java backend lead placed via Envision Technology Solutions at a client site in Berkeley Heights, NJ or Omaha, NE. Day to day: designing and maintaining scalable backend services and RESTful APIs with Java, Spring Boot, and relational databases, using Git in Agile/Scrum.

Avive Solutions, Inc.

Open 93d RemoteNorth AmericaLead H-1B sponsor history

Lead Backend Architect

Agile Analytics API Authentication CI/CD +15 skills

Lead Backend Architect who designs, builds, and maintains scalable backend services and APIs for a connected AED/cardiac-arrest response platform. Core stack is Python, Django, PostgreSQL, Redis, Elasticsearch, and Celery, with emphasis on distributed systems, REST APIs, testing (pytest), and production reliability.

Senior Backend Engineer (PostgreSQL Optimization)

New North AmericaFull-timeSenior

AI Analytics API AWS Cloud +19 skills

Hands-on senior backend engineer building a real-time application/infrastructure analytics platform in Go with a GraphQL API, with a specialty focus on optimizing PostgreSQL/TimescaleDB, Redis, and Elasticsearch for high-volume time-series workloads, deployed on Kubernetes across AWS and GCP.

The Cypress Group

Senior Backend Engineer | AI Infrastructure & Distributed Systems

New North AmericaSenior

Agentic AI AI API Cloud Cloud Native +7 skills

Senior backend engineer at a venture-backed NYC AI startup, designing and building the infrastructure behind an enterprise AI platform — distributed services, APIs, and data pipelines in Go/Python — with early influence over architecture. On-site in New York City.

Senior Backend Software Engineer

New North AmericaFull-timeSenior

AI Analytics Cloud Cloud Native Design Patterns +7 skills

Hands-on senior backend engineer (tech lead track) at Effodio building a cloud application and infrastructure analytics platform, split 80% coding/design and 20% mentoring and technical planning. Core stack is Go, GraphQL, and Kubernetes on a major cloud platform; role is remote within the United States and does not offer visa sponsorship.

Agility Partners

Java Backend Services Developer

New North America

AWS Cloud Cloud Native Event Driven Architecture Java +3 skills

Agility Partners is hiring a Senior Java Backend Services Developer in Mundelein, IL to design, build, and deploy scalable enterprise applications. The core stack is Java, Spring Boot, microservices, AWS, and Terraform, with emphasis on event-driven architecture, Domain-Driven Design, and cloud-native solutions.

Azodha

New North AmericaContractSenior

Senior Backend Engineer (Contract)

Azodha, a fast-growing health-tech startup, is hiring a contract Senior Backend Engineer based in West Virginia to design, build, and scale backend services for its AI-led digital enablement platform used by health systems for care coordination, patient engagement, and clinical operations.

DSM-H Consulting

Lead Java Backend Developer - 403

New North AmericaLead

A lead Java backend developer who works independently on complex application development, programming, and project management for DSM-H Consulting in Schiller Park, IL. Day to day involves building and resolving complex systems, including responding to off-shift and weekend support calls. Core tech: Java backend.

Neurealm

Backend Java Architect

New North AmericaLead

Design Patterns Hibernate Java Spring

A senior backend Java architect/tech lead who designs scalable, maintainable system architectures, writes and reviews Java code, and performs optimization and performance tuning, working with frameworks like Spring and Hibernate. The role is based onsite in Jersey City.

Envision Technology Solutions

New North AmericaContractSenior

Senior Java Backend Developer (9 Years) Berkeley Heights, NJ/Omaha, NE

A senior Java backend lead works on a long-term contract designing, developing, testing, and maintaining scalable backend applications and RESTful APIs, based out of Berkeley Heights, NJ or Omaha, NE. The role is placed by IT staffing firm Envision Technology Solutions with its client.

Senior Backend Engineer

New North AmericaSenior

Senior Backend Engineer at Sniffies, working remotely (US) on the backend of a location-based, map-driven social web app for gay, bi, and curious users, including live video chat features. Pays $152k–$170k plus 10% bonus; Central–Pacific time zones preferred. Tech stack not specified in the posting.

152K – 170K $