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Senior Engineer United States, New York Jobs (On-site work)

105 Job Offers

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Senior Full-Stack Engineer
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Spherecast
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Senior Software Engineer, Fullstack
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Senior Fullstack Engineer role in NYC to architect and scale AI/ML infrastructure and workflow orchestration for healthcare. Requires 5+ years building distributed systems, cloud architecture expertise, and end-to-end ownership in a 0-to-1 in-office environment.
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Assured
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Senior / Staff Full-Stack Engineer, AI Visuals
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Join Suno in NYC as a Senior/Staff Full-Stack Engineer building AI visual products like music videos and generative cover art. Requires hands-on image/video model experience, backend strength, and 0-to-1 product skills. Equity, 401(k) match, unlimited PTO.
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Suno
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Senior Photonics Design Engineer - Semiconductor Optical Amplifier (SOA) / Active Devices)
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Voyant Photonics seeks a Senior Photonics Design Engineer in NYC to develop SOAs and active silicon photonic devices for AI data centers and LiDAR. Requires PhD, III-V/Si integration expertise, and simulation skills.
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Voyant Photonics
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Senior iOS UI Engineer
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Blackbird Labs seeks a Senior iOS UI Engineer in NYC to craft intuitive interfaces with Swift, UIKit, and SwiftUI. Bring App Store experience, Core Animation skills, and a strong design sensibility to revolutionize restaurant loyalty and payments.
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Blackbird Labs Inc
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Senior Product Engineer
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Join Paradigm in NYC as a Senior Product Engineer to build a cutting-edge workspace for LLM-powered research. Requires 7+ years of engineering experience and expertise in distributed systems.
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Paradigm
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Senior iOS Engineer
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Citizen seeks a Senior iOS Engineer in New York to own its consumer safety app used by millions. Deep Swift, TCA, and real-time media expertise required, plus AI agent workflows. Ship to production in week one.
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Citizen
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Senior Infrastructure Engineer
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Posh seeks a Senior Infrastructure Engineer in New York to architect scalable AWS systems, automate CI/CD with Terraform, and harden cloud security. Requires 5+ years in DevOps or backend engineering with strong IaC expertise.
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Posh
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Senior Mechanical Engineer
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Aescape seeks a Senior Mechanical Engineer in New York to own mechanical subsystems for AI-powered robotics, from concept to production. Requires 5+ years, SolidWorks, FEA, and manufacturing expertise.
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Aescape
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Senior Software Engineer
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Join Rho as a Senior Software Engineer in New York and build financial infrastructure for the AI era. Requires 5+ years of full-stack experience, AI fluency, and a bias to ship. Offers equity, healthcare, and PTO.
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Rho
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Senior / Staff Full-Stack Engineer
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Senior/Staff Full-Stack Engineer at Argon in NYC (in person). Own features end to end, from scoping to launch, working closely with founders. Requires strong TypeScript, APIs, and SQL skills with proven product delivery.
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Argon AI
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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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Argon AI
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Senior Software Engineer - Infrastructure
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Probook seeks a Senior Software Engineer in NYC to build product and agent infrastructure from scratch. Requires 3-6 years of engineering experience, strong distributed systems fundamentals, and zero-to-one ownership. Offers equity, health benefits, and $500 monthly perks.
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Probook
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Senior Frontend Software Engineer
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Senior Frontend Engineer role in New York building React/TypeScript interfaces for real-time cyber operations data. Requires 5-8 years experience, strong testing and performance skills. Join a mission-driven team with great benefits.
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Twenty
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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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Twenty
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Senior iOS Engineer
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Join General Intuition as a Senior iOS Engineer in NYC, building the Medal app's real-time recording, social feeds, and video workflows. Requires 5+ years of Swift, UIKit, and SwiftUI experience with a product-driven, ownership mindset.
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General Intuition & Medal
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Software Engineer (Senior)
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Hyphenate seeks a Senior Software Engineer in NYC to build an AI operating system for the CFO office. Requires 5+ years backend experience in Python, Go, Java, or Rust and early-stage startup background.
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Maximor AI
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Senior Network Engineer, Axon 911
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Senior Network Engineer needed in New York to lead network projects for Axon 911. Requires 5+ years hands-on experience with AWS networking, Cisco, Fortinet, and SD-WAN. Competitive salary, 401k match, and flexible PTO offered.
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Axon
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Senior Software Engineer, UI Development
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Senior Software Engineer, UI Development in New York City. Lead frontend architecture with Angular, React, and TypeScript, build high-performance data visualizations, and shape AI-driven product experiences. Above-market salary, equity, and flexible PTO.
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Distributed Spectrum
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Senior Software Engineer, Data Engineering
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Senior Software Engineer, Data Engineering in NYC. Build a petabyte-scale lakehouse and vector database infrastructure for AI-driven radio spectrum intelligence. Requires 4-6+ years, Python, SQL, Spark, Iceberg, AWS. Above-market salary, equity, 401(k) match.
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Distributed Spectrum
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About the Senior Engineer role

Senior Engineer jobs represent the pinnacle of technical expertise and leadership within the engineering field. These roles are designed for seasoned professionals who possess deep, specialized knowledge and are entrusted with guiding complex projects, making high-stakes architectural decisions, and mentoring the next generation of talent. Unlike entry or mid-level positions, senior engineers are expected to operate with significant autonomy, translating broad business objectives into robust, scalable, and innovative technical solutions. They serve as the critical bridge between strategic vision and practical execution, ensuring that engineering outcomes align with long-term organizational goals.

Professionals in these roles typically shoulder a comprehensive set of responsibilities that extend beyond pure coding. A core duty is systems architecture and design, where they define the technical blueprint for major initiatives, selecting appropriate technologies and frameworks to ensure performance, security, and maintainability. They are deeply involved in solving the most challenging and ambiguous problems, applying advanced analytical skills to diagnose issues and devise elegant solutions. Leadership is a fundamental aspect, encompassing code and design reviews, technical mentorship for junior team members, and fostering a culture of engineering excellence and continuous improvement. Furthermore, senior engineers often own the entire lifecycle of critical system components, from conception and development through deployment, monitoring, and iterative enhancement.

The typical skill set for senior engineer jobs is both broad and deep. Mastery in one or more programming languages and relevant technology stacks is a given. However, what truly distinguishes a senior engineer is their proficiency in architectural patterns, such as microservices or event-driven design, and a strong grasp of cross-cutting concerns like security, scalability, and observability. They are expected to have extensive experience with modern development practices, including DevOps principles, CI/CD pipelines, infrastructure as code, and automated testing strategies. Equally important are the soft skills: exceptional communication to articulate complex ideas to technical and non-technical stakeholders, strategic thinking to anticipate future challenges, and a collaborative mindset to work effectively across multidisciplinary teams. A proven track record of driving projects to successful completion and a mindset geared towards innovation and efficiency are common requirements.

Ultimately, senior engineer jobs are for those who are not just builders but visionaries and stewards of technology. They play a crucial role in shaping the technical direction of products and services, mitigating risk, and ensuring that engineering practices evolve to meet emerging demands. For organizations, hiring for these positions is an investment in stability, innovation, and sustained competitive advantage. For engineers, these roles offer the opportunity to have an outsized impact, lead transformative work, and define the future of technology within their domain.