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Senior Software Engineer - Core Jobs

3179 Job Offers

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Senior Software Development Engineer (IBMi)
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Senior Software Development Engineer (IBMi) sought by CVS Health in Richardson, TX. Leverage 5+ years of IBMi expertise, including ILE RPG, CL, and DB2 for i, to lead complex technical projects and modernization efforts. Drive application and database modernization while mentoring developers in a...
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United States , Richardson
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92700.00 - 203940.00 USD / Year
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CVS Health
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Senior Software Engineer
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Join Microsoft Advertising as a Senior Software Engineer to reinvent AI-era measurement systems. You’ll build near real-time conversion pipelines, optimizing attribution signals for global campaign performance. Requires a CS degree and 4+ years in C#, Java, or Python. Based in Redmond, WA, this r...
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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 Manager - Software Development Engineering (Connected PBM)
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Senior Manager, Software Development Engineering (Connected PBM) at CVS Health. Lead full-stack teams building PBM underwriting, contract, and trade systems using Angular, Spring Boot, Java, and cloud platforms (GCP/Azure). Drive CI/CD, Agile delivery, and operational excellence in Springfield. E...
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United States , Springfield
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106605.00 - 260590.00 USD / Year
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CVS Health
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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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Not provided
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Microsoft Corporation
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Senior Principal Software Engineer — Layer 7 Security
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Senior Principal Software Engineer sought to lead Layer 7 security innovation in Santa Clara. This strategic role demands expert-level C/Go skills, deep Unix/Linux experience, and a proven track record designing large-scale distributed systems. You will define architecture for next-gen firewall p...
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United States , Santa Clara
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170000.00 - 277000.00 USD / Year
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Palo Alto Networks
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Senior Principal Software Engineer — Layer 7 Security
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Senior Principal Software Engineer sought to lead Layer 7 security architecture for next-gen firewall platforms in Santa Clara, CA. Requires 12+ years of experience, expert C and Go skills, and deep Unix/Linux expertise. Drive scalable, distributed cloud security systems and mentor senior enginee...
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United States , Santa Clara
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170000.00 - 277000.00 USD / Year
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Palo Alto Networks
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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 - Self Service Automation
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Senior Software Engineer role in Austin, TX, building enterprise-scale self-service automation platforms for GM. You will design cloud-native microservices using Java, .NET, and Kubernetes, automating patching, password rotations, and release management. Requires 7+ years of experience, full-stac...
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United States , Austin
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General Motors
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Senior Android Software Engineer – In-Vehicle Infotainment & OTA
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Senior Android Software Engineer needed to lead IVI app and OTA client development on Android Automotive OS for GM’s next-gen software-defined vehicles. You will own features end-to-end, from architecture to fleet-wide OTA rollout, using expert Kotlin skills and deep AAOS knowledge. Based in Warr...
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United States , Warren
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General Motors
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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
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Senior Software Engineer role at Microsoft Digital in Redmond, WA. You will build AI-powered smart building and employee experience solutions using ReactJS, .NET, and Azure. Requires a Bachelor's in CS or equivalent, 4+ years in Java, JavaScript, or Python, and ability to pass Microsoft Cloud bac...
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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 - EVC
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Senior Backend Engineer sought for Arrive’s EVC team in Stockholm to design and operate microservices powering the EV charging network. Requires 5+ years backend experience, REST APIs, microservices, and stream processing (Kafka/RabbitMQ). Join a collaborative team across Sweden, Estonia, and Pol...
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Sweden , Stockholm
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Arrive
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Senior Software Engineer Staff - Clearance Required
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Join our collaborative team in Spokane as a Special Education Teacher. Develop individualized curricular trajectories and IEPs while training staff in a supportive environment. We require a Master's degree and WA Special Education certification. Benefits include relocation assistance, health insu...
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United States , Gaithersburg
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TieTalent
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Senior Software Engineer Staff
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Senior Software Engineer Staff at Lockheed Martin in Olney, MD. Design and code advanced software solutions for critical cybersecurity missions. Requires 14+ years of SWE experience, a Bachelor's in CS, and an active security clearance with polygraph. Join a team protecting national infrastructur...
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United States , Olney
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TieTalent
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Senior Software Engineer
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Senior Software Engineer sought for AMD’s Bangalore team to drive CPU performance innovation. Leverage strong C/C++ and algorithmic skills to optimize x86 server processors, analyze multi-core bottlenecks, and enhance HPC/MPI applications. Join a dynamic environment fostering technical patents, c...
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India , Bangalore
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AMD
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Senior Software Engineer
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Senior Software Engineer role in Draper, Utah, offering leadership in full-stack development with React.js, Ruby on Rails, and AWS. You’ll design scalable systems, mentor engineers, and drive CI/CD improvements. Benefits include 401(k), insurance, and free training. Join a collaborative team shap...
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United States , Draper
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Robert Half
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Senior Software Engineer
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Senior Software Engineer needed to build the capacity planning platform for Microsoft 365, powering services like Exchange, Teams, and Copilot. You will design distributed systems, automate workflows, and integrate AI-driven insights. Requires a BS in CS and 4+ years coding in C#, Java, or Python...
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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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Principal/ Senior Software Engineer - Identity Security
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Principal/Senior Software Engineer – Identity Security at Palo Alto Networks in Tel Aviv. Drive innovation securing identities across hybrid and SaaS landscapes using cloud-native tech (Kubernetes, Docker, AWS/GCP/Azure). Requires 5+ years backend experience, AI-assisted development skills, and a...
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Israel , Tel Aviv
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Palo Alto Networks Italia
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Senior Software Data Engineer
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Senior Software Data Engineer sought for a Galway, Ireland-based role. Leverage 6+ years of enterprise experience in RDBMS, AWS, and object-oriented programming to build custom data pipelines. Proficiency in Python, Java, or C# with Pandas/NumPy is key, alongside CI/CD and REST API integration. J...
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Ireland , Galway
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68.75 EUR / Hour
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Nicoll Curtin
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Principal / Senior Software Engineer - Identity Security
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Join Palo Alto Networks as a Principal/Senior Software Engineer in Tel Aviv, shaping the future of Identity Security. You'll architect scalable, cloud-native solutions using Kubernetes, Docker, and microservices to secure hybrid and SaaS landscapes. Leverage AI tools like Gemini and Claude to dri...
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Israel , Tel Aviv
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Palo Alto Networks
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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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