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Senior Software Engineer - Core Jobs

3171 Job Offers

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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 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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Senior Software Engineering Manager
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Lead a mission-critical software team at SciTec, supporting U.S. national defense. This Boulder-based role requires an active DoD clearance, expertise in C++/Python, and hands-on leadership in full software delivery. Enjoy top-tier benefits while applying your technical skills to advanced remote ...
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United States , Boulder
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143000.00 - 200000.00 USD / Year
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SciTec
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Senior Software Engineer II - Frontend - AI Search
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Join Seismic's AI team in Hyderabad as a Senior Frontend Engineer. You will build modern, scalable user interfaces with React, TypeScript, and modern CSS. Leverage your 7+ years of experience to integrate with AI-driven search capabilities and REST/GraphQL APIs. Contribute to innovative SaaS solu...
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India , Hyderabad
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Not provided
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Seismic
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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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