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Senior Software Engineer - Core Jobs

3171 Job Offers

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Senior Software Engineer - Auth & User Management
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Join Heidi Health in Melbourne as a Senior Software Engineer specializing in Auth & User Management. Build secure, multi-region scalable systems to protect sensitive health data using Python and modern security practices. Enjoy a fast-paced startup environment with benefits like wellness days and...
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Australia , Melbourne
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Heidi
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Senior Software Engineer, Customer Engineering
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Join Goody as a Senior Software Engineer in Customer Engineering. You'll directly shape the customer experience by unblocking sales deals, building features, and resolving technical escalations. This full-stack role requires expertise in Ruby on Rails (or Python/Node) and React/TypeScript, plus 4...
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United States, Canada
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150000.00 - 200000.00 USD / Year
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Goody
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Senior Software Engineer
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Seeking a Senior Software Engineer for a hybrid role in Heredia, Costa Rica. Design and develop low-level C software for networking products, requiring 4+ years of experience. This position offers a focus on embedded systems, professional development, and a collaborative, innovative environment a...
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Costa Rica , Heredia
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Hewlett Packard Enterprise
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Senior Software Engineer
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Join TKMS ATLAS UK as a Senior Software Engineer in Dorchester. Develop cutting-edge marine autonomous systems using Java and modern tooling. Enjoy flexible working, a generous pension, and professional growth in a collaborative, multi-disciplinary team.
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United Kingdom , Dorchester, Winfrith
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Morson Talent
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Senior Software Engineer
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United Kingdom , Manchester
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55000.00 - 65000.00 GBP / Year
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Morson Talent
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Senior Software Engineer
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Join a private equity-backed tech scale-up in Manchester as a Senior Software Engineer. Work in a product squad using C#, .NET Core, React, and AWS, with full ownership from ideation to deployment. Embrace an experimental culture focused on TDD, Pair Programming, and CI/CD best practices. Benefit...
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United Kingdom , Manchester
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60000.00 - 70000.00 GBP / Year
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Morson Talent
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Senior Software Engineer
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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
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Join Microsoft Security in Redmond as a Senior Software Engineer. Design and build large-scale, distributed datapath services for secure access. Leverage your expertise in C/C++, Go, or Rust, networking protocols, and AI/ML to enhance global security. Drive engineering excellence within a team fo...
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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 Backend Software Engineer
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United States , Remote in select cities
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127000.00 - 192000.00 USD / Year
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Terakeet
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Senior Backend Software Engineer
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Join Terakeet as a Senior Backend Software Engineer. Build scalable systems using Python/Django and deep RDBMS expertise to handle complex, large-scale data. Enjoy a fully remote role with comprehensive benefits like unlimited PTO and health insurance. Collaborate with an innovative team valuing ...
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United States , Remote in Atlanta, GA / Remote in Austin, TX / Remote in Charlotte, NC / Remote in Chicago, IL / Remote In Dallas, TX / Remote in Minneapolis, MN / Remote in Phoenix, AZ / Remote in Syracuse, NY
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127000.00 - 192000.00 USD / Year
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Terakeet
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Senior Software Engineer and Software Engineer II
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Join Microsoft's OneDrive & SharePoint team in Redmond to build large-scale, distributed cloud infrastructure. We seek Senior and Software Engineers II with 2-8+ years of experience in C#, Java, Python, or similar. You'll design core systems, optimize performance, and impact millions of users glo...
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United States , Redmond
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100600.00 - 199000.00 USD / Year
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Microsoft Corporation
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Software Engineer II and Senior Software Engineer - Performance
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Join Microsoft's AI Performance team to optimize cutting-edge LLMs like OpenAI on a global scale. You'll drive inference performance on NVIDIA/AMD GPUs and Microsoft silicon, building tools for massive AI workloads. This role in Mountain View requires a CS degree and 2+ years of coding experience...
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United States , Mountain View
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100600.00 - 199000.00 USD / Year
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Microsoft Corporation
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Senior Software Engineer
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Join Microsoft Teams in Vancouver as a Senior Software Engineer. Design and operate high-scale backend services powering core messaging. Utilize C#, Java, or Python with Kubernetes on large-scale distributed systems. Drive performance and scalability in a dynamic, collaborative environment.
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Canada , Vancouver
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114400.00 - 203900.00 CAD / Year
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Microsoft Corporation
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Senior Software Engineer
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Join Microsoft's Azure Storage team in Sydney as a Senior Software Engineer. Develop and scale the world's largest cloud storage platform, powering services like Blob Storage and Data Lake. Utilize your expertise in C, C++, C#, or Java to build, optimize, and maintain critical systems. This role ...
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Australia , Sydney
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Microsoft Corporation
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Senior Software Engineer
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Join Microsoft in Redmond as a Senior Software Engineer to build scalable AI Agent platforms. You will design full-stack solutions, lead feature delivery, and own experimentation pipelines. This role requires 4+ years of coding experience and a focus on reliability in enterprise contexts.
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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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Full Stack Software Engineer, Senior
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Seeking a Senior Full Stack Engineer in Hanover to develop end-to-end solutions using Python, React, and FastAPI. Leverage 5+ years of Agile experience to solve complex client challenges with modern architecture. Enjoy comprehensive benefits, professional development, and a role shaping systems f...
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United States , Hanover
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86900.00 - 198000.00 USD / Year
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Booz Allen Hamilton
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Senior Embedded Software Test Engineer
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Join our team in Spring, USA, as a Senior Embedded Software Test Engineer. You will design and execute manual/automated tests, ensuring high-quality embedded systems. We seek a candidate with 10+ years' experience in embedded testing, proficiency in Python/C/Go, and expertise in test methodologie...
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United States , Spring
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126500.00 - 276500.00 USD / Year
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Hewlett Packard Enterprise
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Senior Manager, Software Engineering / Business Technology Partner
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Lead software engineering and strategic business partnerships in this dual-role position. You will jointly manage a developer team while driving Agentic AI, automation, and cloud-based solutions. Leverage your expertise in C#, .NET, SQL, and Azure to deliver impactful technology. This San Francis...
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United States , San Francisco
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Software Resources
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Senior Software Engineer - Customer App
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Join Enpal in Berlin as a Senior Software Engineer for the Customer App. You will own complex backend and platform challenges, building scalable microservices for our digital customer experience. We seek a collaborative engineer with proven cloud infrastructure and architecture design skills. Hel...
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Germany , Berlin
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enpal
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Senior Software Engineer
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Join our San Francisco team as a Senior Software Engineer. Drive performance and reliability by building foundational systems with end-to-end ownership. We value autonomy, full-stack versatility, and principled problem-solving. Enjoy competitive compensation, equity, flexible PTO, and a strong co...
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United States , San Francisco
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150000.00 - 300000.00 USD / Year
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Encord
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About the Senior Software Engineer - Core role

Explore Senior Software Engineer – Core jobs and discover a pivotal career at the heart of technology innovation. A Senior Software Engineer in a Core capacity is a seasoned professional responsible for designing, building, and maintaining the fundamental, business-critical systems and services that power modern applications. This role is central to an organization's technical infrastructure, focusing on creating robust, scalable, and high-performance platforms that serve as the backbone for other products and features. Professionals in these jobs move beyond feature development to solve deep architectural challenges, ensuring the entire ecosystem is reliable, efficient, and secure.

Typical responsibilities for a Senior Core Software Engineer involve architecting and implementing scalable, cloud-native systems and distributed computing solutions. They write clean, maintainable, and thoroughly tested code with a strong emphasis on performance, reliability, and fault tolerance. A key part of the role is designing and optimizing data storage and retrieval mechanisms, often working with relational and non-relational databases. These engineers actively collaborate with cross-functional teams, including product management, DevOps, Site Reliability Engineering (SRE), and quality assurance, to define technical roadmaps and operational excellence. They are also tasked with mentoring junior engineers, conducting code reviews, and establishing best practices for the entire engineering organization.

The typical skill set and requirements for these high-impact jobs are comprehensive. Candidates generally possess 5+ years of progressive software development experience, with deep proficiency in one or more backend-oriented languages such as Go, Java, C#, or Python. A strong foundation in computer science fundamentals—data structures, algorithms, and system design—is essential. Practical expertise with modern cloud platforms (AWS, Azure, GCP), containerization (Docker), and orchestration (Kubernetes) is standard, as is experience with microservices architecture and API design. A security-first mindset and understanding of DevOps principles, including CI/CD pipelines and infrastructure as code, are highly valued. Beyond technical acumen, successful Senior Core Engineers demonstrate exceptional problem-solving abilities, a passion for elegant and scalable design, and the leadership skills to drive complex projects from conception to deployment. If you are seeking jobs where you build the foundational technology that enables everything else, a Senior Software Engineer – Core position represents the pinnacle of backend engineering challenges and opportunities.

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