Senior Software Developer I jobs in Washington – Browse 2,794 openings on RoboApply Jobs

Senior Software Developer I jobs in Washington

Open roles matching “Senior Software Developer I” with location signals for Washington. 2,794 active listings on RoboApply Jobs.

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companyMetroStar Systems logo
Full-time|On-site|Washington, DC

MetroStar Systems is looking for a Senior Software Developer I based in Washington, DC. This position centers on designing and building software solutions that address client needs. The role involves working closely with colleagues from different disciplines to deliver technology projects. Role overview This position focuses on both the design and implementation of software. Projects will require balancing technical requirements with client expectations. Collaboration Work with cross-functional teams to ensure solutions are both effective and aligned with project goals. Communication and teamwork are important aspects of this role.

Apr 28, 2026
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companyComtech LLC logo
Contract|On-site|Seattle

We are seeking a highly skilled Senior Software Development Manager to lead our innovative software development team. In this role, you will oversee the software development lifecycle, ensuring the delivery of high-quality software solutions that meet our clients' needs. You will collaborate with cross-functional teams to define project scope, objectives, and deliverables, while also mentoring and guiding team members to reach their full potential.

Feb 24, 2017
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companyiSpot.tv logo
Full-time|$96K/yr - $106K/yr|On-site|Bellevue, WA

Immigration / Work Authorization Notice: iSpot.tv does not offer visa sponsorship or immigration support for this position. Candidates must already have authorization to work in the United States on a full-time, permanent basis without current or future sponsorship needs. iSpot.tv offers a competitive compensation package, including salary and equity, as well as standard benefits. The company is based in Bellevue, WA and is recognized as one of Seattle’s notable start-ups. The team values a collaborative workplace where each person has a direct impact on success. Team and Focus This Software Development Engineer I role joins the Publisher Team, which focuses on integrating AI-driven solutions across the Creative, Audience, and Outcomes (CAO) pillars. The team’s mission is to move beyond simple automation and embed artificial intelligence throughout iSpot’s measurement platform. The position offers hands-on experience at the intersection of big data, AI, and software engineering. Team members help shape the direction of future iSpot products, working in an environment where AI is central to the development process. Key Responsibilities Collaborative development: Partner with senior engineers and AI specialists to design, build, and launch product features enhanced by artificial intelligence. Full-stack engineering: Write, test, and maintain production code for data pipelines, APIs, and autonomous agent workflows. AI-native workflows: Use AI copilots for coding, testing, and documentation to increase productivity and quality. Agile practices: Participate in sprint planning, code reviews, and retrospectives to support team standards and collaboration. DevOps involvement: Set up and manage CI/CD pipelines, including human-in-the-loop validation for reliable deployments. Rapid prototyping: Help move ideas quickly from concept to MVP, validating features and measuring real-world impact. System monitoring: Monitor performance, reliability, and scalability of deployed systems.

Apr 15, 2026
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companyAxon Enterprise, Inc. logo
Full-time|$148.5K/yr - $237.6K/yr|Hybrid|Seattle, Washington, United States

Join Axon and be a Force for Good.At Axon, we’re dedicated to our mission of protecting life. We tackle society’s most pressing safety and justice challenges through our innovative devices and cloud-based software. Our collaborative environment fosters open communication and values diverse perspectives from our customers and communities. Life at Axon is dynamic, challenging, and purposeful. Here, you'll take ownership of your work and drive meaningful change, all while growing in a mission-driven environment where your contributions truly matter.Your ImpactToday, public safety officers often spend up to two-thirds of their working hours on paperwork, which not only burdens them but also detracts from their ability to serve the community. Axon Records streamlines this process, allowing officers to focus more on community safety. As part of the Axon Records Discovery Squad, you will play a pivotal role in creating a high-performance, scalable search and insights platform that empowers law enforcement to access vital information quickly and efficiently.Envision a future where advanced technology automates routine tasks, enabling officers to spend more time in their communities, enhancing safety and quality of life. By 2030, public safety officers will have instant access to essential information, allowing them to connect the dots and protect lives effectively.As a Senior Engineer on the Discovery Squad, you will collaborate closely with software engineers, product managers, and designers to enhance the usability of records data. You’ll lead significant technical projects, implement new features, and help cultivate a positive team culture and engineering practices. Join us in making a lasting impact on the lives of first responders and the communities they serve.

Mar 27, 2026
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companyNintendo of America Inc. logo
Full-time|$140.9K/yr - $253.6K/yr|On-site|Redmond, WA

Join Nintendo of America Inc. as a Senior Software Engineer!At Nintendo, we have been dedicated to creating smiles through unique entertainment experiences for over 30 years. Our mission is to bring joy through our beloved franchises such as Mario™, Donkey Kong™, and The Legend of Zelda™ across the Americas. Based in Redmond, Washington, we are proud to serve as the headquarters for Nintendo’s operations in the Americas. We foster a welcoming and inclusive environment, and we are committed to providing outstanding products and experiences to our diverse consumers and communities. For more information about our innovative products, visit our website.Team Overview: This position is within the IT: Consumer Online & Publishing department, part of the Consumer Online Modernization team. You will play a critical role in supporting various web-based technical applications that drive key business initiatives, including the external My Support Dashboard and other internal development tools. Your expertise will be essential in both application and test development.Key Responsibilities:Implement, test, and deploy complex systems while ensuring exceptional quality, security, and performance.Lead and participate in design reviews to determine the best technical solutions using available technologies.Mentor junior team members, providing constructive feedback and ensuring adherence to best practices.Take ownership of resolving product or system issues that affect critical business functions.Design, develop, and maintain comprehensive automated test frameworks and strategies across unit, integration, and end-to-end testing.Create and present clear, actionable test reports and metrics to promote transparency and aid in quality decisions.

Mar 20, 2026
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companyblencorp logo
Full-time|On-site|Washington, DC

About BLENThe BLEN team is dedicated to harnessing the power of technology to address real-world challenges. With over 20 years of experience, we have been at the forefront of helping government entities and businesses evolve their digital landscape. We infuse innovative thinking into each project, whether it's revitalizing outdated systems, developing cloud-native applications, or exploring emerging technologies. Our emphasis on building lasting partnerships enables us to tackle complex issues by prioritizing human-centered design in all our solutions.About the RoleAs a Senior Software Developer at BLEN, you will be instrumental in crafting robust and efficient digital solutions. You will leverage your extensive expertise in both front-end and back-end technologies, along with your leadership capabilities, to drive projects from initial concept through to successful implementation. Our engineering team is responsible for making critical technical decisions, ensuring effective communication with all stakeholders, and utilizing state-of-the-art technologies to deliver high-quality solutions. You will play a key role in ensuring that our products not only meet client specifications but also align with overarching business objectives while maintaining exceptional standards of performance and scalability.

Aug 22, 2024
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companyiSpot.tv logo
Full-time|$96K/yr - $106K/yr|On-site|Bellevue, WA

Immigration / Work Authorization Notice: iSpot does not offer visa sponsorship or immigration support for this role. Candidates must be authorized to work in the United States on a full-time, permanent basis without current or future sponsorship. iSpot.tv offers competitive salaries, equity, and standard benefits. The team values a collaborative work environment where each person can make a meaningful impact on the company's direction and success. Team and Mission This group builds systems that help brands understand and improve their creative advertising. By combining quantitative performance data with qualitative insights, the team delivers tools that measure creative effectiveness and provide actionable recommendations. Work here shapes how marketers evaluate and enhance their campaigns at scale. What You Will Do Develop clear, well-scoped features that support analytics, insights, and reporting for creative advertising. Write unit, component, contract, and integration tests during feature development. Debug and validate your own code, and document testing requirements for new features. Run a range of tests (unit, integration, end-to-end, regression, performance) to maintain high quality. Support release readiness by sharing status updates and raising concerns when needed. Gather and report metrics; help investigate incidents and alerts with guidance from others. Participate in root-cause analysis for common issues. Identify basic risks and dependencies, with support from senior engineers. Draft technical designs for small features or components. Apply classical data structures, algorithms, and resource management techniques. Work closely with teammates to coordinate tasks and follow through on commitments. Communicate clearly with your manager and team, escalating issues as needed. Use AI tools (with guidance) to support coding, testing, documentation, and code exploration.

Apr 15, 2026
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companyDigitalOcean logo
Full-time|On-site|Seattle

Join DigitalOcean as a Senior Software Engineer I (Storage) and be a key player in developing innovative storage solutions that empower developers around the globe. You will work on cutting-edge technology, enhancing our cloud infrastructure while collaborating with a talented team dedicated to delivering exceptional results.

Mar 3, 2026
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companyblencorp logo
Full-time|On-site|Washington, DC

About BLENAt BLEN, we are driven by a passion for leveraging technology to address real-world challenges. For over two decades, we have partnered with government entities and businesses to enhance their digital transformation journeys. Our innovative approach encompasses everything from updating legacy systems to crafting cutting-edge cloud-native applications, as well as exploring emerging technologies. We prioritize building lasting partnerships and putting human experience at the forefront of our projects. Our team excels in transforming complex problems into practical, accessible, and high-performance solutions.Position OverviewAs a Senior Full Stack Software Developer II at BLEN, you will play a pivotal role in the design, architecture, and development of scalable and robust digital solutions. This position requires a blend of extensive technical skills in both front-end and back-end technologies, along with the capability to collaborate closely with technical leads and, at times, assume tech lead responsibilities. You will be expected to adopt a strategic mindset, mentor fellow team members, and deliver impactful solutions while taking ownership of your work. A strong background in cloud services, system architecture, AI tooling, and a strong drive for innovation through prototyping and transforming concepts into production-ready features is essential for success in this role.

Sep 9, 2024
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companyOpenAI logo
Full-time|On-site|Seattle

About the TeamJoin the Statsig team at OpenAI, where we are at the forefront of experimentation, rollout, and analytics infrastructure that drives innovation in our product development processes. Our robust systems empower teams to safely launch features, conduct experiments, and assess the performance of product and model changes in real-time.Located in OpenAI’s Bellevue office, we foster a collaborative environment that prioritizes in-person teamwork, rapid execution, and the creation of tools that enable our fellow engineers to thrive.About the RoleAs a Senior Product Engineer on the Statsig team, you will play a pivotal role in designing and implementing the experimentation and rollout platform utilized by our diverse product and research teams at OpenAI. Your work will focus on developing the core infrastructure that ensures engineers can launch new features securely, conduct user testing, and gauge the impact of changes on a global scale.This position sits at the crossroads of product engineering and platform infrastructure, requiring close collaboration with teams across ChatGPT, the API, Growth, and Research to maintain rapid development cycles while upholding strong experimentation and rollout practices.Key Responsibilities:Design and build the core experimentation and rollout infrastructure that enables teams to safely launch and evaluate product and model changes.Develop systems for feature management, progressive rollouts, and canary deployments, allowing engineers to ship features quickly while minimizing risks to users.Collaborate closely with Data Science to facilitate the widespread adoption of advanced statistical methodologies.Work in partnership with product, infrastructure, and research teams to seamlessly integrate experimentation and rollout systems into the product development lifecycle.Lead significant technical initiatives, influencing the architecture and future evolution of OpenAI’s experimentation and launch infrastructure.Ideal Candidate:Possesses substantial experience in building internal tooling infrastructure, such as data platforms, experimentation frameworks, feature flagging systems, and developer platforms.Enjoys enhancing systems that empower other engineers to accelerate their work, with a strong focus on developer experience and platform usability.

Mar 17, 2026
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companyAledade logo
Full-time|On-site|Washington DC

Role overview Aledade is hiring a Senior Salesforce Developer I in Washington DC. This role focuses on improving and expanding the company’s Salesforce environment. The Senior Salesforce Developer I will work closely with teams across the business to understand needs and deliver tailored Salesforce solutions that support key goals. What you will do Customize Salesforce applications to meet business requirements Enhance the Salesforce ecosystem through thoughtful development and configuration Collaborate with colleagues from multiple departments to analyze needs and implement effective solutions Focus on optimizing user experience within Salesforce What we look for Strong background in Salesforce development practices Experience customizing and configuring Salesforce applications Ability to translate business requirements into high-quality technical solutions Interest in improving user experiences and business workflows

Apr 15, 2026
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companyPinterest, Inc. logo
Full-time|On-site|Seattle, WA, US; Bay Area, CA

Join our dynamic engineering team at Pinterest, where creativity meets technology! As a Software Engineer I focusing on backend development, you will play a pivotal role in enhancing our platform's capabilities and ensuring a seamless experience for our millions of users. Collaborate with cross-functional teams to design, implement, and optimize backend services that power some of the most innovative features on Pinterest.

Apr 13, 2026
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company
Full-time|On-site|Seattle Washington Area

Role overview O-I is hiring a Business Sales Manager for Glass Containers, focused on the Consumer Packaged Goods (CPG) sector in the Seattle area. The main goal is to grow sales and increase market share by building strong client relationships and understanding glass packaging solutions. Key responsibilities Build and maintain strategic relationships with clients in the Seattle region. Identify customer needs and connect them with O-I’s glass container offerings. Work with marketing and product development teams to ensure products match current market demands. Drive business growth by supporting customer satisfaction and achieving sales targets. Collaboration and impact This position partners with internal groups, such as marketing and product development, to align products with changing customer and market needs. The Business Sales Manager plays a direct role in O-I’s growth and customer retention.

Apr 21, 2026
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companyIonQ logo
Full-time|Hybrid|Bothell, Washington, United States; Oxford, England, United Kingdom

IonQ is looking for a Senior Software Engineer to focus on developer tools. This role centers on building and enhancing software that supports developers working with quantum computing systems. What you will do Design, implement, and refine tools that make quantum programming more accessible Work closely with teams from different disciplines to understand developer needs Contribute to the ongoing improvement of IonQ’s developer toolset Collaboration This position involves frequent collaboration with engineers and specialists across the company to ensure the tools meet the needs of those building and using quantum computing systems. Location This role is based in Bothell, Washington, United States or Oxford, England, United Kingdom.

Apr 21, 2026
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companyMetroStar Systems logo
Full-time|On-site|Washington, DC

MetroStar Systems is seeking a Senior Mobile Application Developer I in Washington, DC. This position centers on designing, building, and maintaining mobile applications that improve user experiences and support business goals. Role overview As a Senior Mobile Application Developer I, collaboration with cross-functional teams is a key part of the role. The work involves implementing new technologies and ensuring mobile solutions integrate smoothly with existing systems. What you will do Design and develop mobile applications with a focus on usability and performance Maintain and update existing mobile products Work with colleagues from different departments to deliver integrated solutions

Apr 28, 2026
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companyVisa Inc. logo
Full-time|On-site|Bellevue

Join Visa Inc. as a Senior Software Engineer and take the opportunity to enhance your skills in a dynamic and innovative environment. You will be responsible for designing, developing, and maintaining high-quality software solutions that meet the needs of our customers. This role requires a deep understanding of software engineering practices and a passion for technology.

Apr 10, 2026
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companyTrupanion logo
Full-time|On-site|Seattle

Role Overview Trupanion is hiring a Senior Software Engineer in Seattle. This position focuses on building and improving software applications that support the company’s services and customer experience. The role works closely with teams across the organization to deliver reliable and effective technology solutions. What You Will Do Design, develop, and implement software applications Work with cross-functional teams to deliver projects Help improve the quality and performance of existing systems Contribute ideas and technical expertise to shape the technology stack Who We’re Looking For Experienced engineer ready to tackle complex technical challenges Comfortable working in a fast-moving environment Collaborative mindset and strong problem-solving skills

Apr 16, 2026
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companyMetroStar Systems logo
Full-time|$138K/yr - $148K/yr|On-site|Washington, DC

MetroStar Systems seeks a Senior Power Apps Developer I in Washington, DC to help modernize applications for the U.S. Department of State. The role centers on reviewing legacy systems and developing scalable solutions with the Microsoft Power Platform, focusing on Power Apps. Role overview This position involves evaluating existing .NET and SharePoint applications to spot areas for improvement. The goal is to create maintainable, scalable tools that support the department’s evolving needs. What you will do Assess legacy .NET and SharePoint applications to identify modernization opportunities Collaborate with internal stakeholders to gather and clarify business requirements Develop strategies for transitioning or enhancing legacy applications using low-code and no-code methods Design, build, and implement Power Apps solutions that address business needs and ensure long-term maintainability About MetroStar Systems For more than 20 years, MetroStar has supported talented professionals and delivered technology services. The company’s mission focuses on supporting its people and delivering value to customers.

Apr 24, 2026
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companyMetroStar Systems logo
Full-time|On-site|Washington, DC

MetroStar Systems is seeking a Senior Mobile Application Developer I to design, build, and deliver mobile applications. This position involves working closely with teams from different disciplines to address technical challenges and maintain strong performance standards. Role overview This role focuses on the full lifecycle of mobile app development, from concept through implementation. The Senior Mobile Application Developer I will contribute to projects that aim to improve user experience and introduce new features. Collaboration Expect frequent collaboration with cross-functional groups to identify technical needs and develop solutions for complex problems. The team values clear communication and a commitment to delivering quality applications. Security clearance requirement This is a clearable position based in Washington, DC. Candidates must be eligible to obtain a security clearance, as work may involve secure or sensitive environments.

Apr 28, 2026
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companyMetroStar Systems logo
Full-time|$133K/yr - $142K/yr|Hybrid|Hybrid - Local to D.C. metro area

Join us as a Senior Full Stack Developer I to play a pivotal role in a high-profile, AI-driven financial compliance program for the Department of War. This essential initiative is focused on modernizing compliance and audit workflows for over 180 systems. You will be responsible for architecting and securing the deployment infrastructure that supports AI-assisted compliance validation, semantic search, and enterprise governance within restricted Department of War environments.This position offers a hybrid work model, with a preference for candidates based in the D.C. metro area who can participate in in-person meetings as necessary.At MetroStar, we believe that exceptional technology services are built from the ground up by amazing individuals. For over two decades, we have cultivated a legacy of assembling the brightest teams. Our commitment to our people is unwavering, as we are driven by a mission that emphasizes a passion for our people and a dedication to our customers.If you see yourself contributing to our mission and helping us achieve our goals, we encourage you to explore the details of this opportunity below!

Mar 2, 2026

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