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Senior Backend Engineer Jobs

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Senior Backend Engineer
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Paxos Labs seeks a Senior Backend Engineer in New York to build Transit, a liquidity network for tokenized assets. Requires 3+ years in production backend systems and financial correctness experience. Own RFQ and orderbook systems end to end.
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Senior Backend Engineer
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Senior Backend Engineer role at Enginy, a fast-growing Barcelona startup building an AI-native GTM platform. Requires 5+ years backend experience with TypeScript, Node.js and PostgreSQL. Own core services, APIs and async workflows.
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Senior Backend Engineer, Shopping Agents
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Sage AI Labs seeks a Senior Backend Engineer in Munich to own checkout agents that transact on the open web. Requires 5+ years Python backend experience, full production ownership, and comfort with adversarial systems.
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Senior Backend Engineer, Shopping Agents
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Senior Backend Engineer role at Sage AI Labs in San Francisco building AI shopping agents that transact on the open web. Requires 5+ years Python backend experience, full production ownership, and adversarial problem-solving. Early-stage equity and full benefits.
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Senior Staff Software Engineer, Backend (Cards)
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Lead technical strategy for innovative credit card products as Senior Staff Backend Engineer. 10+ years experience, AI leadership, and cross-team collaboration required. Remote-first with equity, full medical coverage, and flexible time off.
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236000.00 - 325000.00 USD / Year
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Senior Backend Engineer, NIRA
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Senior Backend Engineer needed for NIRA's consumer credit platform serving 200m underserved Indians. Requires 7+ years Java, AWS-native tools like DynamoDB and Lambda, and proven scalability experience. Remote-first with equity and flexible benefits.
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Senior Backend Software Engineer
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Senior Backend Engineer role at Archy, a Series C dental SaaS innovator. Requires 6+ years backend experience, Java Spring Boot, Snowflake, and strong English. Remote from Brazil, driving AI-powered platform updates.
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Senior Software Backend Engineer, Foundations
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NetBox Labs seeks a Senior Software Backend Engineer for its Foundations platform team. Own complex backend components in Python or Go, build identity and access control services, and mentor engineers. Remote-friendly, open-source driven.
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Senior Software Engineer, Backend (Comms Core)
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Senior Backend Engineer role at Affirm's Communications team, remote in Spain. Build scalable multi-region messaging infrastructure with Python, Kotlin, AWS and Kubernetes. Requires 5+ years experience in distributed systems.
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86000.00 - 122000.00 EUR / Year
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Senior Software Engineer, Backend (Comms Core)
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Affirm seeks a Senior Backend Engineer in Poland to build a highly available, multi-region communications platform delivering billions of messages. Requires 5+ years with Python or Kotlin, AWS, Kubernetes, and distributed systems expertise.
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Senior Software Engineer, Backend (Marketing & Privacy)
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Senior Backend Engineer role focused on marketing data and measurement systems. Requires 4+ years with Python or Kotlin, AWS, MySQL, Kubernetes, plus GTM, GA4 and CDP experience. Remote in Canada with strong benefits.
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153000.00 - 213000.00 CAD / Year
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Senior / Staff Backend Engineer, Platform & Search
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Senior Backend Engineer role in NYC to own platform and search systems at an AI life-sciences startup. Requires production search, TypeScript/Node.js, Python, PostgreSQL, AWS and Kubernetes experience. Work in person with founders.
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Senior Software Engineer - Mobile Backend
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BitGo seeks a Senior Software Engineer in Toronto to build scalable APIs and services for its digital asset platform. Requires 6+ years backend experience with TypeScript, Node.js, and PostgreSQL. Onsite role.
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Senior Backend Engineer, Integrations
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Horizon3 seeks a Senior Backend Engineer to build GraphQL API and integration platforms connecting security tools like CrowdStrike and Splunk. Remote US role with growth opportunities.
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Senior Backend Software Engineer - Consumer Wealth
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Senior Backend Engineer role in Milan shaping savings and investment products for 6.5M users. Requires 5+ years with Java, microservices and AWS, plus mentoring skills. Hybrid work, stock options and unlimited PTO.
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51000.00 - 66500.00 EUR / Year
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Senior Backend Engineer
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Senior Backend Engineer role in Islamabad at a bootstrapped GenAI platform with $35M+ ARR. Own architecture for high-throughput async pipelines, inference orchestration and distributed systems. Requires 5+ years backend experience and strong system design skills.
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Senior Software Engineer - Mobile Backend
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BitGo seeks a Senior Software Engineer in Toronto to build scalable APIs and services for its digital asset platform. Requires 6+ years backend experience with TypeScript, Node.js, and PostgreSQL. Onsite role with crypto focus.
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Senior Backend Software Engineer
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Join Twenty in New York as a Senior Backend Software Engineer. Build scalable Go services and high-performance APIs for mission-critical national security cyber operations. 5+ years backend experience required.
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Senior Backend Software Engineer
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Join Twenty in Arlington as a Senior Backend Software Engineer building scalable Go services and high-performance APIs for offensive cyber operations. 5+ years backend experience required. Competitive benefits included.
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Senior Software Engineer, Web3 Backend
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Senior Software Engineer, Web3 Backend in Menlo Park. Build scalable distributed systems bridging traditional finance with on-chain infrastructure. Requires 5+ years, Go/Python/Java, and deep system design expertise.
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About the Senior Backend Engineer role

Explore the critical and dynamic world of Senior Backend Engineer jobs, where seasoned professionals architect the digital foundations that power modern applications and services. As a Senior Backend Engineer, you are the cornerstone of a product's server-side logic, databases, APIs, and infrastructure, ensuring scalability, reliability, security, and performance. This role transcends basic coding; it involves deep system design, strategic decision-making, and mentoring others to elevate the entire engineering team's output. Professionals in these positions are tasked with transforming complex business requirements into robust, efficient, and maintainable technical solutions that serve millions of users or handle sensitive data with precision.

Typical responsibilities for a Senior Backend Engineer are comprehensive and impactful. They commonly own the design, development, and deployment of backend services and APIs that serve front-end clients and other systems. This includes designing data models, selecting appropriate databases, and implementing business logic. A significant part of the role involves driving architectural discussions, making pivotal decisions on technology stacks, and defining long-term technical roadmaps for their domains. Senior Backend Engineers are expected to champion engineering best practices, conducting rigorous design and code reviews, establishing patterns for testing (unit, integration, load), and implementing robust CI/CD pipelines. They actively troubleshoot and optimize systems for performance and fault tolerance, often leading incident response and firefighting for live production issues. Collaboration is key; they work closely with Product Managers to translate user needs into feasible technical plans and partner with Frontend, DevOps, QA, and Infrastructure teams to deliver cohesive functionality.

The skill set required for these senior-level jobs is both broad and deep. Typically, candidates possess 5+ years of backend development experience, with proven expertise in one or more server-side languages such as Python, Java, Go, C#, Node.js, or C++. A strong grasp of system design principles, distributed systems, microservices architecture, and database design (SQL and NoSQL) is essential. Experience with cloud platforms (AWS, GCP, Azure), containerization (Docker, Kubernetes), and message brokers (Kafka, RabbitMQ) is highly valued. Beyond technical prowess, Senior Backend Engineers must exhibit excellent problem-solving abilities, capable of breaking down ambiguous challenges into actionable plans. Leadership and communication skills are paramount, as the role involves mentoring junior developers, providing technical guidance, and articulating complex concepts to cross-functional stakeholders. A commitment to continuous learning, agility in fast-paced environments, and a proactive approach to code quality and system resilience define success in these critical jobs, making Senior Backend Engineers invaluable assets in building the reliable digital experiences of today and tomorrow.