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Senior Software Engineer - Systems Jobs

3376 Job Offers

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Senior Software Engineer - Integration (Python)
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Join our Integration Engineering team as a Senior Software Engineer. Design and deliver robust Python integration solutions for our core platforms, OpenBAS and OpenCTI. Work remotely from France in an async-first environment, ensuring seamless system interoperability. Enjoy competitive pay, equit...
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France
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Not provided
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Filigran
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Senior Software Engineer, Android
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Join Tonal in San Francisco as a Senior Android Engineer. Develop the embedded app for the world's smartest personal trainer using Kotlin, Jetpack Compose, and backend integration. Collaborate cross-functionally to solve complex challenges in fitness tech, with benefits including equity, health i...
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United States , San Francisco
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165000.00 - 185000.00 USD / Year
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Tonal
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Senior Software Engineer, Full-Stack Mobile
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Join Tonal in San Francisco as a Senior Full-Stack Mobile Engineer. Develop the flagship app for an intelligent fitness system using Flutter, Dart, and Swift. Collaborate cross-functionally to build robust, AI-powered features in a fast-paced, agile environment. Enjoy equity, health insurance, fl...
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United States , San Francisco
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165000.00 - 185000.00 USD / Year
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Tonal
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Senior Software Engineer, Enterprise Platform
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Join our Enterprise Platform team as a Senior Software Engineer in Foster City. Design and build secure, compliant infrastructure using Go/Typescript/Python, Kubernetes, and Terraform. You'll enable enterprise features like private networking, custom authorization, and BYOK encryption. Enjoy comp...
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United States , Foster City
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130000.00 - 290000.00 USD / Year
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Replit
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Senior Java Software Engineer
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Join KAYAK's high-powered team in Berlin as a Senior Java Software Engineer. You'll build and maintain world-leading travel search & booking technology, integrating with hundreds of partners. Requires 4+ years of Java and Spring Boot experience. Enjoy remote work flexibility, extensive benefits, ...
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Germany , Berlin
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Not provided
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KAYAK
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Senior Software Engineer, Money
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Lead billing systems development at Replit as a Senior Software Engineer. Design scalable subscription and usage-based platforms using TypeScript, Node.js, and React. Drive revenue growth by creating intuitive user experiences and robust monetization APIs. Enjoy competitive pay, full benefits, an...
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United States , Foster City
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130000.00 - 290000.00 USD / Year
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Replit
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Senior FullStack Software Engineer
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Join 3Pillar in Guatemala as a Senior FullStack Engineer. Leverage your 5+ years in .NET Core, Angular, and AWS to architect transformative, high-performance web applications. Drive innovation in diverse industries while enjoying competitive benefits like medical insurance and flexible arrangemen...
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Guatemala
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3Pillar Global
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Senior Java Software Engineer
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Join KAYAK's high-powered team in Kaunas as a Senior Java Engineer. Develop and maintain world-leading travel search and booking technology using Java, Spring, and SQL. Enjoy a hybrid model, significant bonuses, RSUs, and global work flexibility while helping millions travel.
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Lithuania , Kaunas
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3330.00 - 6660.00 EUR / Month
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KAYAK
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Senior FullStack Software Engineer
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Join 3Pillar as a Senior FullStack Engineer in Mexico. Lead the design of scalable web applications using your 5+ years of expertise in .NET Core, Angular, and AWS. Collaborate on transformative projects, from healthcare to media, while enjoying competitive benefits like insurance, profit sharing...
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Mexico
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3Pillar Global
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Senior Software Engineer, Agent Platform
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Join us as a Senior Software Engineer to build the core platform and tools powering AI Agents. You will design high-throughput backend systems and collaborative interfaces, bridging AI logic and user experience. This full-stack role requires 5+ years of backend/platform expertise and a product-fo...
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United States , Foster City
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180000.00 - 260000.00 USD / Year
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Replit
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Senior Software Engineer - Python & React
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Join 3Pillar in Guatemala as a Senior Software Engineer. Leverage your 5+ years of expertise in Python, React, and enterprise systems to architect transformative solutions. You will drive client success through agile development, mentoring, and building scalable, high-quality software. Enjoy comp...
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Guatemala
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3Pillar Global
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Senior Software Engineer
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Join Bentley to shape the future of engineering software. As a Senior Software Engineer in Pune, you'll build full-stack applications using TypeScript, React, and modern cloud patterns. This role offers a competitive salary and the chance to develop world-class solutions for global infrastructure.
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India , Pune
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Bentley Systems
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Senior Software Engineer
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Join Bentley Systems as a Senior Software Engineer in Kaunas or Vilnius. Develop cutting-edge cloud services using C++ within an Agile team. We offer professional development, health insurance, and extra paid leave. Utilize your 5+ years of C++ experience to build next-generation software.
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Lithuania , Kaunas; Vilnius
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4000.00 EUR / Month
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Bentley Systems
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Senior FullStack Software Engineer - .NET/Angular/AWS
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Join 3Pillar in Costa Rica as a Senior FullStack Engineer. Leverage your 5+ years of expertise in .NET Core, Angular, and AWS to architect transformative, high-performance solutions. You will lead projects, collaborate with cross-functional teams, and drive innovation across industries. Enjoy a c...
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Costa Rica
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3Pillar Global
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Senior FullStack Software Engineer - .NET/Angular/AWS
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Join our team in Costa Rica as a Senior FullStack Software Engineer. You will leverage your expertise in .NET, Angular, and AWS to build innovative solutions. This role requires fluent English for technical collaboration. We offer a dynamic environment with opportunities for professional growth.
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Costa Rica
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3Pillar Global
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Senior Software Engineer
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Join our team in Bangalore as a Senior Software Engineer. Develop scalable, serverless web applications using TypeScript, Angular, and AWS. You will leverage AG Grid, Terraform (CDKTF), and modern CI/CD practices in an Agile environment.
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India , Bangalore
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Robert Bosch Sp. z o.o.
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Senior Software Engineer
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Join BCX Labs at Microsoft as a Senior Software Engineer. Design and build innovative AI-driven solutions for Microsoft 365, collaborating with top engineers and researchers. This role requires 4+ years of coding experience in C++, C#, Python, or Java. Accelerate your career while shaping one of ...
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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 in Redmond to shape the future of AI with Project Sophia. As a Senior Software Engineer, you'll build disruptive, AI-first applications using modern stacks like .NET/React and LLMs. Design and ship end-to-end features on an infinite AI canvas, from backend services to intelligent U...
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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 (Fullstack)
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Join a remote-first team in Argentina building an AI-native Digital Experience Platform. As a Senior Fullstack Engineer, you'll design scalable systems using Node.js, TypeScript, and AWS. We seek a proactive leader with 7+ years' experience to drive key projects in a collaborative, agile environm...
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Argentina
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Not provided
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G2i Inc.
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Senior Software Engineer for Code Reviewing LLM Data Training
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Join our team as a Senior Software Engineer specializing in Swift code review. You will audit AI-generated code evaluations, ensuring quality, functionality, and adherence to guidelines. This remote role requires 5-7+ years of Swift expertise and strong QA skills. Weekly pay provided.
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G2i Inc.
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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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