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Senior Software Engineer - Systems Jobs

3156 Job Offers

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UI UX Senior Software Engineer
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Senior UI/UX Software Engineer needed to lead full-stack development for U.S. Army and USMC defense systems at Aberdeen Proving Ground. Requires expertise in Java, JavaScript, React, Angular, and Agile methodologies. Must have experience with DoD mission-critical platforms, CI/CD pipelines, and c...
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United States , Aberdeen Proving Ground
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VES
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Senior Software Engineer
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Senior Software Engineer sought for Pune-based role developing cloud & AI solutions for infrastructure digital twins. Requires 8+ years experience with .NET, React, and 3-4 years in AI/ML, including Generative AI & LLMs. Key skills: Python, LangChain, vector databases, and full-stack ML deploymen...
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India , Pune
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Bentley Systems
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Senior Software Engineer
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Senior Software Engineer sought for full-stack development in Warrenton, VA or Augusta, GA. Must have strong Java, JavaScript/TypeScript, and an active TS/SCI with polygraph. Collaborate on mission-critical systems using Python, Angular, React, and ElasticSearch. Join a supportive team offering d...
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United States , Warrenton, VA; Augusta, GA
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Altamira Technologies
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Senior Software Engineer
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Senior Software Engineer with Top Secret Clearance needed in Warrenton, VA. You’ll deliver full-stack solutions using Java, JavaScript, and TypeScript, while adapting to Python, Angular, or React. Join a collaborative team that values independent problem-solving and continuous integration. Must h...
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United States , Warrenton
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Altamira Technologies
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Senior Software Engineer
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Senior Software Engineer sought for full-stack development in Dayton, US. Requires TS/SCI clearance, 10+ years’ experience, and expertise in C++, Python, JavaScript, React, or Angular. You’ll drive algorithm innovation, legacy support, and web solutions in a collaborative, problem-solving environ...
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United States , Dayton
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Altamira Technologies
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Senior Software Engineer
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Senior Software Engineer sought for an agile team in Iași, Romania. Drive architectural decisions and own complex technical initiatives using Java, AWS (ECS, Fargate, Lambda), and Terraform. Lead engineering excellence, mentor peers, and shape the technical roadmap. Enjoy a flexible four-day work...
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Romania , Iași
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Awin Global
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Senior Software Engineer
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Join Microsoft’s Azure Data engineering team as a Senior Software Engineer. Build and enhance Visual Studio Code extensions and AI-assisted developer tools for Azure SQL and SQL Server. Requires 4+ years of coding in C#, TypeScript, or Python, plus a Bachelor's in CS. Drive innovation in data pla...
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United States , Multiple Locations
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119800.00 - 234700.00 USD / Year
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Microsoft Corporation
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Senior Software Engineer
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Join Microsoft’s Azure Data team in Hyderabad as a Senior Software Engineer to build the data platform for the AI era. Develop core services, APIs, and SDKs using C, C++, C#, Java, or Python. Requires a Bachelor’s in CS and 5+ years of engineering experience. Drive innovation on products like Mic...
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India , Hyderabad
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Microsoft Corporation
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Senior .NET Software Engineer
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Join a leading GameTech innovator as a Senior .NET Software Engineer. Leverage 6+ years of .NET Core and C# expertise to architect high-performance, distributed systems with microservices and RabbitMQ. Based in Athens or Thessaloniki, this hybrid role offers full ownership of scalable backend sol...
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Greece , Athens; Thessaloniki
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Randstad
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Senior Java Software Engineer
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Senior Java Software Engineer sought for a permanent, hybrid role in Athens' northern suburbs. Join a fintech leader to build high-performance backend services using Spring, PostgreSQL, and Bash. You'll optimize systems serving millions, tackle performance bottlenecks, and adopt modern tools like...
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Greece , Athens
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Randstad
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Senior Principal Software Engineer — Layer 7 Security
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Senior Principal Software Engineer — Layer 7 Security role in Santa Clara, CA. Lead architecture and development of next-gen, high-performance distributed security systems. Requires 12+ years of experience, expert-level C and Go, deep networking and TCP/IP expertise. Drive innovation in mission-c...
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United States , Santa Clara
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147000.00 - 237500.00 USD / Year
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Palo Alto Networks
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Senior Lead Software Engineer
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Senior Lead Software Engineer sought by Capital One to drive major tech transformation in McLean, VA. Lead full stack teams building cloud-based solutions on AWS, Azure, or GCP using Java, Python, or TypeScript. Requires 6+ years software engineering experience and 1+ year cloud computing. Enjoy ...
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United States , McLean
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229900.00 - 262400.00 USD / Year
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Capital One
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Senior Lead Software Engineer (Full Stack)
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Senior Lead Full Stack Software Engineer sought by Capital One to drive cloud-native transformation in Houston, McLean, or Riverwoods. Lead diverse tech projects, mentor engineers, and build robust solutions using JavaScript, Java, Python, or Go. Requires 6+ years’ software engineering experience...
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United States , Houston; McLean; Riverwoods
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209000.00 - 262400.00 USD / Year
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Capital One
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Senior Software Engineer - Full Stack
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Join Microsoft Clarity as a Senior Full Stack Engineer to build a high-performance user behavior analytics platform used by millions. You’ll own data accuracy and efficiency, develop AI-forward features, and design scalable distributed services on Azure. Based in Redmond, this role requires 4+ ye...
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United States , Redmond
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119800.00 - 234700.00 USD / Year
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Microsoft Corporation
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Senior Software Engineer (Kotlin)
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Senior Software Engineer (Kotlin) sought by hyperexponential, a high-growth AI startup backed by a16z. Build scalable, cloud-native data systems on AWS using Terraform and Kotlin. You will design distributed analytics infrastructure and deliver customer-facing features for a $7 trillion insurance...
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United Kingdom , London
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hyperexponential
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Senior Software Engineer
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Senior Software Engineer sought to design and scale validation platforms for system-level confidence. This hands-on role requires 5+ years building distributed systems, Python/JavaScript expertise, and AWS experience. You will develop cloud-native services, APIs, and automation tooling for CI-int...
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India
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SimpliSafe
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Senior Software Engineer
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Senior Software Engineer sought by a London health-tech scale-up to scale a platform used by 100k+ customers. You’ll own problems end-to-end, working across Python backend, React/TypeScript frontend, and AWS infrastructure. Ideal candidates have 5+ years experience, actively use AI in their workf...
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United Kingdom , London
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100000.00 GBP / Year
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Orbis Consultants
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Senior Software Engineer, MediaWiki
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Join the Wikimedia Foundation as a Senior Software Engineer on the MediaWiki Platform team. You will enhance the core open-source platform powering Wikipedia, focusing on performance, scalability, and reliability. We seek backend engineering expertise, strong system design skills, and experience ...
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United States
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113082.00 - 175725.00 USD / Year
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Wikimedia Foundation
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Senior Software Engineer
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Join a greenfield AI startup in London redefining innovation discovery and protection. As a Senior Software Engineer, you’ll build production systems from scratch using Java, TypeScript, or Python, integrate with LLMs, and collaborate directly with founders. No legacy code or bureaucracy—just fas...
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United Kingdom , London
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120000.00 - 150000.00 GBP / Year
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Linux Recruit
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Senior Software Development Engineer
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Senior Software Development Engineer sought by CVS Health Digital to drive backend innovation using Java, Spring Boot, and microservices. You will design complex systems, integrate cloud-native services on GCP, and streamline CI/CD pipelines. This hybrid role in Buffalo Grove or Richardson offers...
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United States , Buffalo Grove; Richardson
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92700.00 - 203940.00 USD / Year
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CVS Health
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About the Senior Software Engineer - Systems role

Explore Senior Software Engineer - Systems jobs and discover a pivotal role at the intersection of software development and core infrastructure. Professionals in these positions are the architects and builders of the foundational platforms, services, and frameworks that power large-scale, reliable, and performant applications. Unlike roles focused solely on end-user features, Senior Software Engineers in Systems delve into the underlying engine, optimizing for scalability, resilience, and efficiency to support millions of users and complex data flows.

Typically, individuals in this profession are responsible for designing, developing, and maintaining critical system-level software. This includes creating distributed systems, high-throughput data pipelines, low-latency services, and robust platform infrastructure. Common responsibilities involve architecting scalable solutions, conducting deep-dive performance analysis and debugging across the entire software stack, establishing engineering best practices and standards, and providing technical leadership and mentorship to other engineers. They own the full lifecycle of system components, from conceptual design and implementation to deployment, monitoring, and iterative improvement.

The role demands a unique blend of deep technical expertise and strategic vision. Typical skills and requirements include extensive experience with systems programming languages such as C++, Go, Java, or Rust, and a profound understanding of computer science fundamentals like data structures, algorithms, operating systems, and networking. Expertise in distributed systems concepts—including consensus, consistency, and fault tolerance—is paramount. These engineers are proficient in profiling and debugging complex systems, often needing to trace issues from high-level application logic down to native code or kernel interactions. A performance-first mindset, experience with cloud-native technologies and containerization, and a strong grasp of CI/CD pipelines and observability tools are standard expectations. Leadership skills are crucial, as these senior professionals champion technical excellence, drive architectural decisions, and elevate the entire engineering organization through mentorship and the establishment of a culture focused on robustness and scalability.

For those seeking to solve the most challenging engineering problems and build the bedrock upon which digital experiences stand, exploring Senior Software Engineer - Systems jobs offers a career path defined by high impact, continuous learning, and shaping the technological future of an organization.

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