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Senior Software Engineer - Core Jobs

3171 Job Offers

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Senior Software Engineer
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Join Checkr in Denver as a Senior Software Engineer to build the future data platform. Leverage 5+ years of backend expertise in Ruby, Golang, or JS/TS to architect scalable systems and modernize our tech stack. Enjoy full benefits, a flexible PTO policy, and a collaborative environment where you...
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United States , Denver
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155000.00 - 182000.00 USD / Year
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Checkr
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Senior Staff Software Engineer
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Lead the architectural vision for Checkr's core systems as a Senior Staff Software Engineer. This Denver or San Francisco-based role requires 15+ years of experience to drive international expansion and enterprise architecture. You'll leverage expertise in Ruby, GoLang, and cloud technologies to ...
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United States , Denver; San Francisco
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213000.00 - 295000.00 USD / Year
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Checkr
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Senior Software Engineer
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Join Checkr in San Francisco as a Senior Software Engineer. You'll architect new platform capabilities using Ruby, Golang, or TypeScript. Drive technical excellence, system modernization, and mentor engineers. Enjoy full medical coverage, flexible PTO, and a wellness stipend.
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United States , San Francisco
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183000.00 - 215000.00 USD / Year
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Checkr
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Senior Software Engineer- Frontend
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Join our new team in Malmö as a Senior Frontend Engineer. You will build seamless interfaces for financial products using React, TypeScript, and API-driven architecture. We work agile, driven by data and cloud (GCP) to create impactful customer solutions. Experience with automated setups and secu...
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Sweden , Malmö
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Not provided
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IKEA
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Senior JVM Software Engineer
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Join a leading German telecom & IT innovator at their new European Tech Center in Warsaw. As a Senior JVM Software Engineer, you'll develop the Sales Cockpit backend using Java, Spring Boot, and REST APIs. Enjoy a hybrid model, flexible hours, and benefits like a cafeteria system and revenue shar...
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Poland , Warsaw
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Not provided
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Inetum
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Senior JVM Software Engineer
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Join our Kraków team as a Senior JVM Software Engineer. Design robust, scalable backend solutions using Java 8, Spring Boot, and Microservices. Enjoy a hybrid model, flexible hours, and a supportive culture with technical mentoring. Leverage your 5+ years of experience to integrate platforms and ...
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Poland , Kraków
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Inetum
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Senior Software Development Engineer
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Join our team in Noida as a Senior Software Development Engineer. You will maintain and optimize Oracle database applications using advanced SQL and PL/SQL. Your role includes data modeling, performance tuning, and collaborating with developers and testers. We offer an inclusive, respectful workp...
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India , Noida
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Sopra Steria
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Senior Software Development Engineer
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Join our team in Noida as a Senior Software Development Engineer, specializing in Oracle database applications. You will leverage your strong SQL and PL/SQL expertise to optimize statements, perform data analysis, and collaborate with developers. We offer an inclusive work environment committed t...
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India , Noida
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Sopra Steria
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Senior Software Engineer
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Join our Kraków team as a Senior Software Engineer to modernize and stabilize core systems. You'll need strong C++ skills, experience with C#/Python wrappers, and hands-on knowledge of Docker, Kubernetes, and Linux. This role offers a direct impact on critical infrastructure, flexible hours, priv...
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Poland , Kraków
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Montrose Software
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Senior Security Software And System Engineer
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Join HPE's Cybersecurity Lab as a Senior Security Software and System Engineer in Aguadilla. Design and implement advanced security solutions, focusing on penetration testing, cryptographic validation, and automation tools. Leverage your expertise in secure software architecture, network security...
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United States , Aguadilla
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Hewlett Packard Enterprise
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Senior Software Engineer
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Join our London team as a Senior Software Engineer. You will design technical architecture and lead complex projects in Scala/Python, shaping the SolstiCE platform. This role offers a bonus, private medical care, and 27 days' leave. Drive efficiency and automation for our Equity Derivatives busin...
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United Kingdom , London
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Citi
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Catia CAA Senior Software Engineer
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Join Sopra Steria as a Catia CAA Senior Software Engineer in Bengaluru. Utilize your 2-4 years of expertise in CATIA V5 CAA, C++, and C#/.Net within Agile teams. You will design, develop, and support solutions across the full product lifecycle. We offer an inclusive work environment open to all.
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India , Bengaluru
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Sopra Steria
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Aras Senior Software Engineer
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Join Sopra Steria as an Aras Senior Software Engineer in Bengaluru. Drive the full product lifecycle using C#, .Net, and JavaScript within Agile teams. Develop and support robust PLM solutions while enjoying an inclusive work environment.
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India , Bengaluru
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Sopra Steria
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CATIA CAA Senior Software Engineer
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Join Sopra Steria as a CATIA CAA Senior Software Engineer in Bengaluru. You will design and develop technical solutions using CATIA V5 CAA, C++, and C#/.Net within Agile teams. This role requires strong geometry concepts and offers an inclusive work environment committed to diversity.
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India , Bengaluru
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Sopra Steria
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Devops Senior Software Development Engineer
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Join Sopra Steria as a Senior DevOps Engineer in Bengaluru. You will build CI/CD pipelines, implement DevSecOps, and support cloud deployments. Key skills include AWS, Kubernetes, Terraform, and scripting with PowerShell/Groovy. We offer an inclusive work environment open to all.
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India , Bengaluru
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Sopra Steria
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Senior Full Stack Software Engineer
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Seeking a Senior Full Stack Engineer in San Francisco to architect and develop complex systems integrating Finance applications with AI. You'll leverage Oracle Cloud, Python, React, and AWS to build scalable solutions. This role offers mentorship opportunities, health coverage, and paid volunteer...
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United States , San Francisco
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146300.00 - 235000.00 USD / Year
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Atlassian
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Senior Full Stack Software Engineer
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Join our team in San Francisco as a Senior Full Stack Engineer. Leverage 5+ years of expertise in JavaScript (React/Node) and modern frameworks to guide technical direction and build scalable features. Enjoy health coverage, paid volunteer days, and wellness resources while mentoring teammates an...
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United States , San Francisco
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146300.00 - 234900.00 USD / Year
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Atlassian
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Senior Software Engineer
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Join our global Markets Technology team in Pune as a Senior Software Engineer. You will design solutions in OTC derivatives and payments using Java/Python, REST APIs, and microservices. We seek a proactive engineer with 10+ years' experience to drive SDLC and foster a strong engineering culture. ...
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India , Pune
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Citi
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Senior Software Engineer
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Join our global Markets Technology team in Pune as a Senior Software Engineer. Drive the SDLC for transformative OTC derivatives and payments projects using Java/Python, AWS, and Kafka. We seek a hands-on technologist with 10+ years' experience in distributed systems and microservices. Help build...
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India , Pune
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Citi
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React Senior Software Engineer
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Join Sopra Steria in Noida as a Senior React Engineer. Develop high-performance UI components using React.js, JavaScript, and Redux. Leverage your expertise in front-end architecture, debugging, and performance testing with Jest. We offer an inclusive work environment in a collaborative team.
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India , Noida
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Sopra Steria
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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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