Back-end developer jobs in Seattle, WA

Design, build, and maintain backend services and APIs using C# and .NET Collaborate with UX designers, engineers, architects, and product owners to break down requirements and deliver value. Identify current or potential technical issues and propose clear solutions. Help...

 ...Design & Development – Architect and build end-to-end solutions with an experiment-...  ...architecture (AWS, GCP, or Azure) and database-backed REST APIs. ~ Comfortable owning...  ...researchers passionate about open-source and developer tools. Ownership: Drive initiatives end... 

Ask any employee to explain their benefits, and you'll likely get a confused shrug. Ask any HR leader if their benefits investment is working, and you'll get an honest "I don't know." For employees, benefits are confusing and overwhelming. For HR and finance leaders, benefits...

 ...providing a fast, reliable and accurate view of Trips, Drivers, Vehicles and other critical Fleet data. What You'll Do: Develop highly observable, reliable, and scalable platform components with a focus on long-term maintainability. Design, build, and... 

 ...quality, scalable solutions. This role provides opportunities to develop strong engineering fundamentals, work with shared components and...  ...to work in an open office environment. ~ Experience in front-end component/framework development using Javascript frameworks (such... 

 ...now trusted by millions of users nationwide. With strong venture backing and consistent year-over-year growth, they've established...  ...modern JavaScript ~ Proven ability to ship complete features end-to-end in production environments ~ Strong product thinking and... 

 ...of ownership and accountability for both code quality and the end-to-end product experience. At SoFi, close partnership across Product...  ...with project leads, engineering managers, and fellow developers to coordinate complex feature launches.   What you’ll need... 

 ...now trusted by millions of users nationwide. With strong venture backing and consistent year-over-year growth, they've established...  ...days/week onsite) based in Seattle, WA. What You'll Do: Lead end-to-end development of major features across the full stack, from... 

 ...integrating sensor data into downstream products and external systems Develop novel test infrastructure for various systems in our platform...  ...programming language ~ Proven experience owning features end-to-end from development, test, and release ~ Experience with... 

 ...The Role: We are seeking a Staff Software Engineer to join our team. SoFi is building out a new team to develop crypto products and services for our members. Recent developments made a path for SoFi to begin to re-enter the space and expand on our product offerings... 

 ...with product and design teams (ex-Google/FB/Apple/Microsoft) to develop, test, and launch new features and improvements for our...  ...technologies and best practices. Develop and maintain both front-end and back-end components, ensuring seamless integration and optimal... 

 ...seeking an experienced Senior Full Stack Developer with deep expertise in backend systems...  ...building robust, scalable, and user-friendly end-to-end solutions for GenAI applications,...  ...best practices across front-end and back-end development. ~ Communicate effectively... 

 ...research firms, including Forrester and Gartner. We are seeking an experienced BI Full Stack Developer specializing in Tableau. The ideal candidate will be responsible for end-to-end Tableau dashboard development and design, managing the entire development lifecycle... 

 ...with 20+ years of experience each, Pay-i is a seed-stage company backed by five venture capital firms and executive/C-suite angels from...  ...Stack Engineers responsible for implementing our customer’s front-end experience. This is a unique opportunity to build with a deeply... 

 ...rapidly growing Seattle & NYC SaaS company developing an innovative platform in a trillion-...  ...transforming how enterprise B2C brands take back control from platform algorithms. Our AI-...  ...the user-facing application from front-end experiences to backend apis Bridge the... 

Description INRIX is seeking a Senior Software Engineer to join our Data as a Service, Intelligence Platform Team. This group is responsible for building backend services that fuse real-time data (~20 billion data points per day), historical data, and machine learning...

 ...Description iSoftStone , Inc. is seeking a Full Stack Software Developer to join our Team in Everett, WA! Onsite Opportunity   Summary: We are looking for a Full Stack Software Engineer who is eager to learn, build, and grow in a fast-paced IoT... 

 ...About the Team Come help us build and develop tools serving hundreds of engineers internally! We’re looking for a Fullstack Software Engineer to join our Developer Console team. About the Role Our mission is to improve the developer experience of engineers... 

 ...join us!  What You Will Do   In this role, you will:   Develop our IAM platforms and rapidly iterate while collaborating actively...  ...-on develop critical infrastructure components.    Write back-end APIs in Java and Go, using industry-standard frameworks.   Work... 

 ...opportunity to gain hands-on experience in the rapidly evolving field of data and AI security. Responsibilities Assist in developing and testing new features for our security platform Collaborate with cross-functional teams on data analysis and visualization... 

 ...Berlin, Seattle, and Mexico City), and is backed by world-class investors. Our teams are...  ...responsibilities within the design, architecture, and end-to-end delivery of key product features...  ...it by providing equal opportunities to develop and thrive. We will constantly... 

 ...Serverless technologies (Lambda, DynamoDB, SQS, EventBridge), developing event-sourced systems that provide complete state history and auditability...  ...Functions). Familiarity with TypeScript for robust front-end or Node.js development. Proficiency with a modern front-end... 

 ...emergency calls every day. By reducing hold times and streamlining operations, we’re helping agencies regain control and bring focus back to where it matters most: saving lives. We’re growing fast—and looking for a Software Engineer who wants to make a real,... 

Social Finance, LLC seeks Software Engineer in Seattle, WA:  Job Duties: Use different object-oriented programming languages to build performant and scalable backend applications in a cloud-based microservice architecture. Participate in shaping the technical architecture...

 ...Responsibilities - Design, build, and optimize high-performance systems in C++ supporting AI data pipelines and evaluation workflows - Develop full-stack tooling and backend services for large-scale data annotation , validation, and quality control - Improve reliability... 

 ...re integrating AI (Gemini today, expanding further) to automate and optimize complex financial workflows. ⁠Own core backend systems end-to-end, including APIs, data models, and services powering FX, payments, and financial workflows ⁠Design and build scalable... 

 ...the intersection of scalable backend systems, data versioning and cross team collaborations. In this role you will: Design, develop, and maintain the scalable backend infrastructure and data processing pipeline for storing and serving map data as we onboard the... 

 ...Marine Corps, and Special Operations Command. Backed by eight-figure contracts across the...  ...national security by iterating closely with end users engaged in tactical operations....  ...Qualifications: Professional experience developing user interfaces in production systems.... 

 ...RAG pipelines, and insight generation. Key Responsibilities Build and deploy generative AI solutions using Amazon Bedrock Develop and integrate foundation model workflows (prompting, tuning, evaluation) Design and implement RAG (retrieval-augmented... 

 ...we’re building infrastructure for real-time, low-latency, and high-scale inference — fully integrated with Atlas and designed for developer-first experiences. As a Software Engineer 3, you'll focus on building core systems and services that power model inference at scale...