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Senior Software Engineer - Core Jobs

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Senior Software Engineer - C#
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Join Giacom as a Senior C# Software Engineer in Brno. Develop robust .NET solutions using Web API, Entity Framework, and Azure/AWS. Enjoy flexible working, 25+ days holiday, and a supportive team driving innovation for UK tech providers.
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Czech Republic , Brno
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Giacom
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Senior Software Engineer
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Seeking a Senior Software Engineer in Annapolis Junction, MD. Own a Kubernetes-native platform, integrating modern UI/UX with cloud-native microservices. Requires TS/SCI w/Poly, 20+ years' experience, and expertise in Go, TypeScript, and Kubernetes. Ideal candidate will advance event-driven syste...
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United States , Annapolis Junction
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2HB
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Senior Software Engineer
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Seeking a Senior Software Engineer in Annapolis Junction, MD, for a TS/SCI w/Poly role. You will own a Kubernetes-native platform, advancing its modern UI, microservices, and cloud-native architecture. Required expertise includes Go, TypeScript, Python, Kubernetes, and event-driven systems like K...
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United States , Annapolis Junction
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2HB
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Senior Software Engineer
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Seeking a Senior Software Engineer in Annapolis Junction, MD, for a TS/SCI w/Poly role. You will own a Kubernetes-native platform, advancing its web UI, microservices, and cloud-native components. Required expertise includes Go, TypeScript, Kubernetes, and event-driven systems like Kafka. This ro...
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United States , Annapolis Junction
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2HB
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Senior Software Engineer
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Join our Cortex Content R&D group as a Senior Software Engineer in Tel Aviv. Specialize in Python to develop security orchestration and automation solutions. Lead CI/CD pipeline design, provide technical guidance, and collaborate with global teams in cybersecurity. Requires 5+ years in software d...
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Israel , Tel Aviv-Yafo
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IAG GBS
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Senior Software Engineer
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Seeking a Senior Software Engineer in Gurgaon or Mumbai. Utilize your 4-6 years of expertise in C#, .NET, MVC, and SQL Server to design, develop, and lead a team. Key responsibilities include full-cycle application development, code review, and mentoring junior developers. This role requires stro...
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India , Gurgaon, Mumbai
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iNube
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Senior Software Engineer
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Join Microsoft's Azure Networking team as a Senior Software Engineer. Design and build the next-generation AI network infrastructure for the world's largest data centers. Utilize your expertise in C, C++, or Python to develop large-scale distributed systems. This role is based in Serbia and offer...
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Serbia , Multiple Locations
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Microsoft Corporation
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Senior Software Engineer
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Join SimplerQMS as a Senior Software Engineer to build a vital QMS platform for the life science industry. This remote role requires 4+ years of experience, including JavaScript or Ruby on Rails, and cloud deployment skills. You will own key product components in a flat-hierarchy, growth-focused ...
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Denmark , København
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Life Science Talent
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Senior AI Software Engineer
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Lead AI innovation for the banking sector in Makati City. This senior role requires 5+ years in full-stack development and 3+ years in applied ML, including LLMs and Agents. You will design, deploy, and maintain cutting-edge Agentic AI solutions from concept to production. Enjoy an annual bonus, ...
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Philippines , Makati City
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Avaloq
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Senior Angular Software Engineer
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Join our agile team as a Senior Angular Engineer, shaping the future Web Workplace platform. You will design and develop robust solutions using Angular, TypeScript, and Node.js in a self-organized, international environment. We offer flexible work, an annual bonus, and dedicated learning opportun...
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Philippines , Makati City
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Avaloq
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Senior Angular Software Engineer
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Join our agile team in Makati as a Senior Angular Software Engineer. You will design and develop our future Web Workplace platform using Angular, TypeScript, and Node.js. We seek an autonomous developer with 5+ years' experience for full lifecycle ownership. Enjoy annual bonuses, flexible work, a...
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Philippines , Makati City
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Avaloq
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Senior Software Engineer
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Join EvolutionIQ as a Senior Software Engineer in New York. Leverage your 5+ years of Python expertise and Agentic/AI coding tools like Cursor to build scalable, multi-tenant backend systems. You'll own the full development lifecycle for our AI-powered insurance platform, enjoying top benefits an...
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United States , New York
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180000.00 - 225000.00 USD / Year
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EvolutionIQ
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Senior Software Engineer - GenAI, LLM
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Shape the future of autonomous marketing as a Senior Software Engineer specializing in GenAI and LLMs. Design and deploy production-grade agentic AI systems in a virtual-first role based in Czechia. Enjoy flexible hours, a significant education budget, and a culture built on freedom and trust.
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Czechia
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Bloomreach
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Senior Software Engineer - GenAI, LLM
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Shape the future of autonomous marketing as a Senior Software Engineer in Slovakia. Build and deploy production-ready GenAI and LLM agentic systems with real-world impact. This virtual-first role requires hands-on expertise in Python, backend development, and full-cycle AI system delivery. Enjoy ...
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Slovakia
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3700.00 EUR / Month
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Bloomreach
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Senior Software Engineer - AI
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Join our AI team as a Senior Software Engineer in Czechia. Develop and deploy ML-powered features using Python, TensorFlow/PyTorch, and cloud platforms like GCP/AWS. Enjoy a virtual-first role with flexible hours, a professional development budget, and the chance to impact millions of users.
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Czechia
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Bloomreach
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Senior Software Engineer
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Join Bloomreach as a Senior Software Engineer in Czechia. Develop high-scale, reliable data pipelines using Python and Go on GCP. Enjoy a remote-first culture with flexible hours, a professional development budget, and comprehensive wellness benefits.
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Czechia
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Bloomreach
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Senior Software Engineer - AI
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Join our AI team as a Senior Software Engineer and revolutionize marketing with ML-powered solutions. You will design, build, and maintain scalable APIs and microservices using Python and cloud platforms (GCP/AWS). Enjoy remote work in Central/Eastern Europe, stock options, and a flexible, virtua...
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Slovakia
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3700.00 EUR / Month
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Bloomreach
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Senior Software Engineer
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Join Bloomreach in Bratislava as a Senior Software Engineer. Develop high-scale data pipelines using Python and Go, handling tens of thousands of requests per second. Enjoy a remote-first culture, flexible hours, and a substantial professional development budget. Build reliable ETL processes on G...
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Slovakia , Bratislava
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3700.00 EUR / Month
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Bloomreach
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Senior Software Engineer - Broker-Dealer Clearing
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Join our New York team as a Senior Software Engineer in Broker-Dealer Clearing. You will build mission-critical, high-throughput systems that power the global financial markets. We seek an expert with 8+ years of experience and strong CS fundamentals to solve complex problems. Enjoy competitive c...
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United States , New York
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170000.00 - 250000.00 USD / Year
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Clear Street
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Software Engineer Mid to Senior Level
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Join Mayvue as a Mid to Senior Software Engineer, shaping impactful products used by millions. Leverage 6+ years with C#, .NET, SQL, and Vue.js in a collaborative, innovative team. Enjoy ultimate flexibility with remote or Pittsburgh-based work, plus strong benefits like unlimited PTO and a learn...
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United States , Pittsburgh
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Mayvue Solutions
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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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