Backend Developer Jobs in Washington, United States

Backend Web Development team at NuAxis Innovations builds scalable backend services and APIs for federal government solutions. The role designs, develops, tests, and deploys Python and Java microservices, manages PostgreSQL databases, Elasticsearch search, and AWS cloud infrastructure, and supports CI/CD pipelines with GitLab.

NuAxis Innovations is a federal IT company focused on putting customer experience at the core of government solutions. As a Backend Web Developer you will design, develop, test and maintain scalable Python and Java microservices, build RESTful APIs, optimize PostgreSQL databases, and integrate Elasticsearch and AWS services.

eBay is seeking a Software Development Engineer – Backend to join its GraphQL champions team in Bellevue. The role focuses on designing and implementing Node.js, Spring Boot, and DGS GraphQL Federation services, driving high availability, throughput, and performance cost analysis.

Senior Backend Developer at Aritzia's Digital Technology team. Design, build, and support scalable APIs and microservices on Google Cloud.

Expedia Group’s Pricing team builds high‑performance backend services that power global travel bookings. The Backend Software Engineer designs, develops, and maintains scalable services, collaborates with product and partner teams, and ensures operational excellence through monitoring and on‑call support.

Run and Release platform team at Humana secures the enterprise software supply chain by providing a centralized application security posture service. The Senior Backend Developer/DevSecOps Engineer builds and optimizes .NET microservices, designs CI/CD gating logic, and automates Azure infrastructure with Terraform and Python, while collaborating with developers to improve security and reduce technical debt.

Dev Technology's Platform Engineering team builds modern web and mobile applications for federal clients. The Mid-Level Backend Developer designs, develops, tests, and maintains services using React, TypeScript, Node.js, and AWS, collaborating with cross‑functional teams to deliver scalable, secure solutions.

Senior Software Engineer at AT&T responsible for designing, developing, and maintaining scalable Java backend services. Leads automation, CI/CD, and quality testing, collaborates with cross‑functional teams, and ensures production reliability.

To get the best candidate experience, please consider applying for a maximum of 3 roles within 12 months to ensure you are not duplicating efforts. Job Category Software Engineering Job Details About Salesforce Salesforce is the #1 AI CRM, where humans with agents drive customer success together.

Backend Software Developer role supporting New Glenn launch vehicle data engineering. Develop Java/SQL services, design, testing, observability, CI/CD, and collaborate across teams to deliver reliable, maintainable software.

Photon Group, a global digital modernization leader, seeks a seasoned .NET backend architect to spearhead high‑performance services in Azure. The role blends technical design, micro‑service architecture, and team mentorship, driving scalable APIs and secure data layers.

Accenture Federal Services' SAP practice helps federal agencies modernize data warehousing and analytics. As a SAP Application Developer, you will design and build SAP BW on HANA data models, develop backend components, and lead a team delivering large‑scale reporting solutions.

LiveRamp, a leader in data collaboration and identity resolution, seeks a Senior Software Development Engineer – Big Data Backend to build and maintain data pipelines powering the largest Identity Resolution graph in the U.S. The role involves designing, optimizing, and deploying batch-oriented data pipelines using Spark, Hadoop MapReduce, and Apache Beam on Google Cloud Platform, as well as managing cloud resources (BigQuery, Dataproc, Dataflow, PubSub). The engineer will collaborate with Data

Aurora Control Plane team builds the foundational platform for Amazon Aurora Serverless, delivering highly available, scalable, and fast database services. The role designs and implements web service APIs and workflows that orchestrate thousands of databases, mentors junior engineers, and drives system reliability.

EG Advertising team at Expedia Group builds the advertising platform that powers revenue growth across onsite, partner, and off‑platform channels. As a Software Development Engineer II you will design, implement, test and maintain secure, scalable backend services and full‑stack features, collaborate with product, data science and engineering partners, and contribute to AI/ML‑enabled capabilities.

Salesforce seeks a highly experienced Backend Software Development Engineer for its Agentforce for Supply Chain platform, a leading AI-powered solution transforming global supply chains. The role, based in Seattle, Washington, focuses on designing, building, and scaling mission‑critical data ingestion and export pipelines, integrating with Salesforce ecosystem products such as Mulesoft, Flow, Data Cloud, and Informatica.

ARPA-H Agentic AI Platforms team at Booz Allen Hamilton builds next‑generation agentic AI to accelerate research, decision‑making, and product shipping at scale. As a Senior Software Development Engineer you will own backend infrastructure on Azure, design LLM orchestration, manage data pipelines, authentication, CI/CD, cost economics, and observability for multi‑agent systems.

Air Reservations team at Expedia builds the core engine for flight bookings, handling millions of transactions monthly. The role designs, builds, and maintains scalable, reliable backend services in Java, ensuring performance, resilience, and security.

Digital Technology at Aritzia builds scalable, high‑traffic e‑commerce APIs that power everyday luxury experiences. As a Senior Backend Developer, you design, implement, and maintain cloud‑native services, collaborate with product, design, and data teams, and mentor junior engineers.

Digital Technology department at Aritzia designs, builds, and operates scalable technology solutions for everyday luxury experiences. As a Senior Backend Developer you will design and implement high‑traffic APIs, microservices, and cloud‑native systems on Google Cloud, collaborate with product, design, and data teams, and ensure secure, reliable deployments.