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Senior Software Engineer - Systems Jobs (Remote work)

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Senior Software Engineer (SDET)
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Join Microsoft Azure Storage as a Senior Software Engineer (SDET) in India to build the world’s most scalable cloud storage system. You’ll design E2E performance tests, develop automation tools, and analyze distributed systems for latency and bottlenecks. Requires 6+ years in C, C++, C#, or Pytho...
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India , Multiple Locations
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Not provided
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Microsoft Corporation
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Senior Software Engineer
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Senior Software Engineer sought for a fully remote UK role with a cloud-native leader in child safety technology. You will design and build high-performance backend services using Golang and GCP, alongside frontend work with TypeScript and React. Key requirements include microservices, SQL, CI/CD...
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United Kingdom
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75000.00 - 85000.00 GBP / Year
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Premier Group
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Senior Software Engineer (Healthcare Integrations)
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Senior Software Engineer (Healthcare Integrations) – fully remote, US-based. Design and deliver scalable integration solutions connecting patient intake, referral workflows, call centers, and EMR platforms like Cerner. Must have senior-level API, distributed systems, and cloud (AWS/Azure) experie...
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United States
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Not provided
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Tech Holding
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Senior Software Engineer
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Senior Software Engineer (C++ / Algorithms) sought to build a high-performance visualization engine in the UK. This role demands strong C++ skills, deep computer science fundamentals, and a passion for solving complex algorithmic and graphical problems. Join a culture of technical excellence, foc...
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United Kingdom
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200000.00 GBP / Year
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Oho Group Ltd
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Senior Software Engineer - Azure Hyper Networking
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Senior Software Engineer – Azure Hyper Networking. Build and optimize the software-defined network infrastructure powering Microsoft’s global cloud and AI data centers. Requires expertise in C, C++, C#, or Python, large-scale distributed systems, and switch/router configuration. Join a team at th...
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Serbia , Multiple Locations
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Not provided
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Microsoft Corporation
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Senior Software Engineer, Data Management
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Senior Software Engineer, Data Management – Bogotá, Colombia. Design and build scalable APIs and distributed systems to power Fullstory’s AI-enhanced products. Drive zero-configuration features, manage services that auto-label user event data, and collaborate on design and code reviews. Leverage ...
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Colombia , Bogotá
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80000.00 - 89000.00 USD / Year
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Fullstory
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Senior Software Engineer (Rocks)
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Senior Software Engineer (Rocks) sought by Invent.ai, a fast-growing AI firm revolutionizing retail supply chain. You will own end-to-end development across Python/PySpark, AWS Lambda, and React, leveraging AI coding tools to accelerate delivery. Requires 6+ years in scalable SaaS, deep OOP knowl...
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United States
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invent.ai
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Senior Software Engineer - Applications
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Senior Software Engineer - Applications: Build and scale high-throughput backend services and messaging infrastructure for healthcare platforms. Leverage Ruby on Rails, JavaScript, and PostgreSQL to design reliable APIs and distributed systems. Drive technical ownership of complex features, from ...
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United States
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60.00 - 80.00 USD / Hour
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Signify Technology
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Senior Software Engineer
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Senior Software Engineer – Firefox Monitor. Build cloud-native Node.js/TypeScript systems at the intersection of security and privacy. Lead backend development, own GCP/AWS infrastructure, and optimize PostgreSQL at scale. Join Mozilla to protect millions from data breaches with top benefits and ...
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United States; Canada
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Mozilla
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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 (React)
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Senior Software Engineer (React) sought to build intuitive, high-performance UIs for cloud-based industrial AI solutions. You will lead technical design, develop complex data visualizations, and define front-end best practices. Requires 7+ years experience, expert TypeScript, and deep React exper...
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Poland , Rzeszów
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Edvantis
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Senior CAM Software Engineer
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Senior CAM Software Engineer sought in White River Junction, VT to lead development of advanced manufacturing software for complex turbomachinery. Requires 5+ years of C++ and Python experience, plus expertise in geometric modeling and CNC machining. Drive multi-axis toolpath programming, mentor ...
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United States , White River Junction, VT
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100000.00 - 130000.00 USD / Year
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Concepts NREC
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Senior Software Engineer (AWS & Data)
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Senior Software Engineer (AWS & Data) – remote role in Poland. Build cloud-native apps and data pipelines using AWS Glue, PySpark, ECS/Kubernetes, FastAPI, and React. Requires strong DevOps skills with Terraform and CI/CD. Enjoy full remote work, private medical care, Multisport card, and life in...
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Poland
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130.00 - 150.00 PLN / Hour
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Cyclad Sp. z o.o.
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Senior Software Engineer - Github Copilot API
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Join GitHub as a Senior Software Engineer on the Copilot API team, building scalable backend services and APIs for the world’s leading AI pair programmer. You’ll design distributed systems, ensure high reliability and performance, and mentor engineers across multiple locations in Czech Republic. ...
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Czech Republic , Multiple Locations
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Microsoft Corporation
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Senior Software Engineer
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Senior Software Engineer sought to design and deliver scalable micro frontend architectures using React, TypeScript, and NestJS. This UK-based role focuses on building high-performing, secure applications with a DevSecOps mindset. You will mentor engineers, drive CI/CD improvements, and shape tec...
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United Kingdom
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Admiral Group Plc
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Senior Software Engineer - Engineering Workflow and CI
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Mozilla seeks a Senior Software Engineer to enhance developer productivity by improving Firefox’s CI/CD and engineering workflows. You’ll build Python-based services, optimize testing pipelines, and work cross-platform (Windows, Linux, Mac). Ideal for experts in FastAPI, GCP/AWS, and GitHub Actio...
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Sweden, Germany, France, UK, Finland, Belgium, Spain, Netherlands
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Mozilla
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Senior Software Engineer (Golang)
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Senior Software Engineer (Golang) needed in Minneapolis to design scalable backend systems and high-performance microservices. Requires 8+ years of experience, 3+ years with Golang, and deep AWS expertise. You will build APIs, containerize apps with Docker, and optimize MySQL databases. Benefits ...
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United States , Minneapolis
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69.00 USD / Hour
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Apex Systems
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Senior Software Engineer - Azure Storage
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Join Microsoft Azure Storage as a Senior Software Engineer on the Ultra Disk team, building the fastest block storage platform in the cloud. Design and implement scalable, high-performance distributed systems for exascale data, using C, C++, C#, or Python. Based in multiple US locations, this rol...
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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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Invert seeks a Senior Software Engineer to join our remote-first team in San Francisco. You will leverage 6+ years of experience with Python, React, TypeScript, and AWS to ship features and mentor engineers. Drive technical decisions for sustainable scaling in bioprocessing automation. Enjoy comp...
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United States , San Francisco
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130000.00 - 200000.00 USD / Year
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Helpcare AI
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Senior Software Engineer II
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Senior Software Engineer II – Confluent, India (Remote-First). Design and scale the Kora Serverless platform, Confluent’s cloud-native Kafka service. Requires 6+ years of experience, deep expertise in distributed systems, and proficiency in Java/Scala. Join a collaborative team building high-perf...
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India
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Not provided
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Confluent
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Until further notice
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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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