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Senior Software Engineer - Core Jobs (On-site work)

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Senior Software Engineer
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Senior Software Engineer needed in Dallas to drive HiOperator’s mission of automating customer service. You’ll own complex features across the full stack, from API integrations (REST/GraphQL/gRPC) and UI development to DevOps and ML model deployment. We seek a collaborative polyglot with 5+ years...
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United States , Dallas
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Helpcare AI
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Senior Software Engineer - Communications Platform (Backend)
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Join Uber's Communications Platform as a Senior Backend Engineer in San Francisco or Sunnyvale. Architect and build highly scalable, mission-critical systems powering real-time and offline communications for millions of users. Requires 4+ years of experience, proficiency in Python, Go, or Java, a...
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United States , San Francisco, California; Sunnyvale, California
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202000.00 - 224000.00 USD / Year
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Uber
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Senior Software Engineer C++
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Senior Software Engineer C++ role in Chennai, India. Design and deliver high-performance backend systems using modern C++ (C++20, Boost, STL). Requires 8+ years of C++ development, Unix/Linux expertise, and CI/CD skills. Join global teams to build optimized, reliable components with exposure to D...
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India , Chennai
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Randstad
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Senior Software Developer Engineer in Test
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Senior SDET role in Bengaluru, India, driving quality across Zuora’s Order, Billing, and Payments ecosystem. Requires 8+ years in test automation, Java OOP expertise, and AI-driven tool proficiency. You will develop frameworks, influence product quality, and collaborate across teams. Benefits inc...
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India , Bengaluru
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Zuora
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Senior Software Engineer Staff - Clearance Required
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Senior Software Engineer Staff sought by Lockheed Martin in Glen Burnie, MD to lead cyber security software development. Requires 14+ years SWE experience, a Bachelor’s in CS, and an active security clearance with polygraph. Design complex algorithms, integrate systems, and mentor teams. Enjoy wo...
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United States , Glen Burnie
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TieTalent
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Senior Software Engineer – Radiotherapy Positioning & Monitoring
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Senior Software Engineer sought for Brainlab’s R&D team in Munich, Germany. You will develop ExacTrac Dynamic, a high-precision radiotherapy positioning system using C++ and full-stack skills. Join an agile, international team to impact cancer treatment globally. Benefit from 30 vacation days, a ...
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Germany , Munich
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Brainlab
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Software Engineer Senior
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Amentum seeks a Senior Software Engineer to support the Space Force Range Contract in Melbourne, FL. You will design, develop, and test complex software for new and existing systems. Requires a STEM Bachelor’s degree, 8+ years of experience, and proficiency in Python, JavaScript, Windows, and Lin...
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United States , Melbourne
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135000.00 - 150000.00 USD / Year
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Amentum
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Senior Software Engineer
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Wells Fargo seeks a Senior Software Engineer in Hyderabad, India. You will lead complex initiatives, designing and deploying scalable microservices using Java 17, Spring Boot, and Kafka. The role demands 4+ years of experience with LLMs, NLP, RAG pipelines, and frameworks like PyTorch or TensorFl...
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India , Hyderabad
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Wells Fargo
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Senior Software Engineer
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Senior Software Engineer sought to build secure, scalable backend systems in Bengaluru. Leverage Java, Spring Boot, and RESTful services within a regulated enterprise environment. Requires 5+ years of experience, Oracle database expertise, and Redis knowledge. Lead technical initiatives, ensure c...
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India , Bengaluru
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Wells Fargo
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Senior Software Engineer
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Wells Fargo seeks a Senior Software Engineer in Hyderabad, India, to lead enterprise-scale Essbase (ASO/BSO) financial reporting solutions. You will design, develop, and optimize complex analytical systems while collaborating with finance and IT stakeholders. Requires 4+ years of software enginee...
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India , Hyderabad
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Wells Fargo
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UI UX Senior Software Engineer
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Senior UI/UX Software Engineer needed to lead full-stack development for U.S. Army and USMC defense systems at Aberdeen Proving Ground. Requires expertise in Java, JavaScript, React, Angular, and Agile methodologies. Must have experience with DoD mission-critical platforms, CI/CD pipelines, and c...
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United States , Aberdeen Proving Ground
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VES
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Senior Software Engineer
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Senior Software Engineer sought for full-stack development in Warrenton, VA or Augusta, GA. Must have strong Java, JavaScript/TypeScript, and an active TS/SCI with polygraph. Collaborate on mission-critical systems using Python, Angular, React, and ElasticSearch. Join a supportive team offering d...
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United States , Warrenton, VA; Augusta, GA
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Altamira Technologies
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Senior Software Engineer
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Senior Software Engineer with Top Secret Clearance needed in Warrenton, VA. You’ll deliver full-stack solutions using Java, JavaScript, and TypeScript, while adapting to Python, Angular, or React. Join a collaborative team that values independent problem-solving and continuous integration. Must h...
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United States , Warrenton
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Altamira Technologies
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Senior Software Engineer
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Senior Software Engineer sought for full-stack development in Dayton, US. Requires TS/SCI clearance, 10+ years’ experience, and expertise in C++, Python, JavaScript, React, or Angular. You’ll drive algorithm innovation, legacy support, and web solutions in a collaborative, problem-solving environ...
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United States , Dayton
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Altamira Technologies
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Senior Principal Software Engineer — Layer 7 Security
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Senior Principal Software Engineer — Layer 7 Security role in Santa Clara, CA. Lead architecture and development of next-gen, high-performance distributed security systems. Requires 12+ years of experience, expert-level C and Go, deep networking and TCP/IP expertise. Drive innovation in mission-c...
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United States , Santa Clara
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147000.00 - 237500.00 USD / Year
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Palo Alto Networks
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Senior Lead Software Engineer
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Senior Lead Software Engineer sought by Capital One to drive major tech transformation in McLean, VA. Lead full stack teams building cloud-based solutions on AWS, Azure, or GCP using Java, Python, or TypeScript. Requires 6+ years software engineering experience and 1+ year cloud computing. Enjoy ...
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United States , McLean
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229900.00 - 262400.00 USD / Year
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Capital One
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Senior Lead Software Engineer (Full Stack)
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Senior Lead Full Stack Software Engineer sought by Capital One to drive cloud-native transformation in Houston, McLean, or Riverwoods. Lead diverse tech projects, mentor engineers, and build robust solutions using JavaScript, Java, Python, or Go. Requires 6+ years’ software engineering experience...
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United States , Houston; McLean; Riverwoods
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209000.00 - 262400.00 USD / Year
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Capital One
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Senior Software Engineer - Full Stack
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Join Microsoft Clarity as a Senior Full Stack Engineer to build a high-performance user behavior analytics platform used by millions. You’ll own data accuracy and efficiency, develop AI-forward features, and design scalable distributed services on Azure. Based in Redmond, this role requires 4+ ye...
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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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Senior Software Engineer sought by a London health-tech scale-up to scale a platform used by 100k+ customers. You’ll own problems end-to-end, working across Python backend, React/TypeScript frontend, and AWS infrastructure. Ideal candidates have 5+ years experience, actively use AI in their workf...
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United Kingdom , London
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100000.00 GBP / Year
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Orbis Consultants
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Senior Software Engineer
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Join a greenfield AI startup in London redefining innovation discovery and protection. As a Senior Software Engineer, you’ll build production systems from scratch using Java, TypeScript, or Python, integrate with LLMs, and collaborate directly with founders. No legacy code or bureaucracy—just fas...
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United Kingdom , London
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120000.00 - 150000.00 GBP / Year
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Linux Recruit
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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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