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Senior Software Engineer - Systems Jobs

3339 Job Offers

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Senior Software Engineer - AI Applications
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Join as a founding Senior AI Software Engineer in San Francisco. Build and scale cutting-edge GenAI products using LLMs, RAG, and agent frameworks. Shape Plaid's AI-first future with a focus on rapid experimentation and high-impact solutions. Enjoy comprehensive benefits including medical, dental...
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United States , San Francisco
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180000.00 - 270000.00 USD / Year
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Plaid
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Senior Software Engineer - Data Infrastructure
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Join Plaid in Seattle as a Senior Software Engineer for Data Infrastructure. You will shape the core data and ML platforms powering thousands of financial apps. We seek 5+ years' experience in ML or Data Infrastructure systems like Spark and data warehouses. This role offers key projects, leaders...
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United States , Seattle
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180000.00 - 270000.00 USD / Year
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Plaid
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Senior Software Engineer - Backend
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Join Plaid in Seattle as a Senior Backend Software Engineer. Design and build scalable, high-performance microservices and APIs that power the financial ecosystem. Leverage 5+ years of experience with MySQL and system design to mentor a team and ship impactful products. Collaborate cross-function...
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United States , Seattle
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165600.00 - 248400.00 USD / Year
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Plaid
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Senior Software Engineer
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Join our team in Belfast as a Senior Software Engineer. You will design and build high-scale distributed systems using Java and microservices for a global platform. This role requires 5+ years of experience, cloud expertise (AWS/Azure/GCP), and offers the chance to mentor engineers and shape tech...
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United Kingdom , Belfast
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Not provided
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Bazaarvoice
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Senior Java Software Engineer
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Join a fast-growing tech innovator transforming global logistics. As a Senior Java Engineer, you'll design scalable applications using Java and Spring Boot. This fully remote, permanent role requires 5+ years' experience and offers collaboration with dynamic teams. Experience with Microservices i...
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North Macedonia , Central Macedonia
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Not provided
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Randstad
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Senior Software Development Engineer – .NET Core
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Lead the technical delivery of robust .NET Core solutions in Johannesburg. This senior role requires 5-8 years' experience designing scalable applications in Agile teams. You will mentor developers, ensure best practices, and support the full SDLC. A background in regulated environments and Azure...
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South Africa , Johannesburg
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Not provided
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NTT DATA
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Senior Software Engineer
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Join Microsoft's Identity team as a Senior Software Engineer, developing critical Azure services for Government Secret Clouds. This role requires an active U.S. Top Secret/SCI clearance and expertise in languages like C# or Python. You will design, code, and ensure the reliability of world-class ...
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United States , Reston
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119800.00 - 234700.00 USD / Year
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Microsoft Corporation
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Senior Software Engineer, Full Stack
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Join Microsoft Security in Redmond as a Senior Full Stack Software Engineer. Design and build secure, scalable distributed systems for critical Ring 0 services. Leverage your expertise in C#, Java, or Python to enhance reliability and mentor junior engineers. Shape the future of cloud security in...
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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 - CoreAI
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Join the Azure Dev Services team as a Senior Software Engineer - CoreAI. Design and own high-performance, low-latency distributed systems for critical Azure services. Leverage your cloud expertise and work with cutting-edge AI technologies like LLMs and RAG. This Redmond-based role offers deep im...
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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, GitHub
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Join GitHub's Core UX team as a Senior Software Engineer. Shape the React-based UI platform powering the world's development hub. Drive performance, scalability, and modernize web architecture from Rails to React. This remote role in Mexico focuses on frontend platform primitives and developer ex...
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Mexico , Multiple Locations
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Not provided
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Microsoft Corporation
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Senior Software Engineer II, Production Management
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Join Dandy as a Senior Software Engineer II to shape the backbone of our custom manufacturing supply chain. You'll develop full-stack solutions for complex logistics and production systems with substantial autonomy. We seek 6+ years of experience, especially in high-growth startups, with backend ...
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United States
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201450.00 - 237000.00 USD / Year
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Dandy
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Senior Software Engineer, Full Stack
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Join Hopper's Fintech team as a Senior Full-Stack Engineer. Build scalable backend systems with Scala/React for innovative travel products, integrating with major global partners. Enjoy a remote-friendly role with top benefits like unlimited PTO, equity, and comprehensive health coverage. Shape t...
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United States , New York; Chicago; Washington D.C.
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230000.00 - 300000.00 USD / Year
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Hopper
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Senior Software Engineer, Full Stack - Fintech Airlines
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Join Hopper's Fintech team to build innovative travel products like Cancel for Any Reason. As a Senior Full-Stack Engineer, you'll design scalable backend systems using Scala/React for our global B2B platform. This role offers competitive salary, equity, unlimited PTO, and a flexible work locatio...
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United States , Boston; Austin; Miami
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Hopper
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Senior Software Engineer, Full Stack - Fintech Airlines
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Join Hopper's Fintech team as a Senior Full-Stack Engineer in Vancouver or Toronto. Build scalable backend systems with Scala/React for innovative travel products, integrating with major airlines via HTS. Enjoy a competitive salary, full insurance premiums, and pre-IPO equity in a dynamic, agile ...
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Canada , Vancouver; Toronto
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200000.00 - 300000.00 CAD / Year
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Hopper
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Senior Software Engineer, Full Stack
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Join Hopper's Fintech team as a Senior Full-Stack Engineer in Mexico. Build scalable backend systems with Scala/React for innovative travel products, integrating with major global partners. Enjoy a competitive salary, full medical coverage, and pre-IPO equity in a dynamic, agile environment.
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Mexico
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Hopper
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Senior Software Engineer, Full Stack
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Join Hopper's Fintech team in Dubai as a Senior Full-Stack Engineer. Build scalable backend systems with Scala and React, powering innovative travel products for global partners. Enjoy competitive salary, equity, full medical coverage, and a flexible work environment. Shape the future of travel f...
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United Arab Emirates , Dubai
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Hopper
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Senior Software Engineer - Azure Policy Team
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Join the Azure Policy team to build scalable governance solutions for Microsoft Azure. As a Senior Software Engineer, you'll design and implement high-quality code, leveraging your expertise in Azure Cloud, Kubernetes, and policy-based systems like OPA/Gatekeeper. This role offers the opportunity...
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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, Full Stack
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Join Hopper's Fintech team as a Senior Full-Stack Engineer in Brazil. Build scalable backend systems with Scala and React for innovative travel products. Enjoy competitive salary, equity, premium health insurance, and a flexible work environment.
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Brazil
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Not provided
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Hopper
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Senior Software Engineer, Full Stack - Fintech Airlines
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Join Hopper's Fintech team as a Senior Full-Stack Engineer in Colombia. Build scalable backend systems with Scala and React for innovative travel products. Work on the B2B HTS platform, integrating with major airlines and partners. Enjoy a competitive package with equity, insurance, and a dynamic...
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Colombia , Bogotá; Cali; Medellin
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Not provided
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Hopper
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Senior Software Engineer, Full Stack
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Join Hopper's Fintech team in Saudi Arabia as a Senior Full-Stack Engineer. Build scalable backend systems with Scala and React for innovative travel products. Work on the B2B HTS platform, integrating with major global partners. Enjoy competitive salary, equity, full medical coverage, and genero...
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Saudi Arabia
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Not provided
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Hopper
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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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