Senior Software Engineer (Python, FastAPI)

We are seeking a Senior Backend Software Engineer to join a high-growth digital marketing technology company that builds large-scale data and messaging platforms used by enterprise customers across multiple industries. This is a full-time hybrid position requiring 2 days per week onsite in either Northern New Jersey or New York City. The ideal candidate will bring deep Python expertise, strong cloud engineering experience, and a passion for building scalable backend systems that operate at significant volume. U.S. work authorization is required. No visa sponsorship is available at this time.Job Title: Senior Software Development Engineer, Backend Location: Hybrid (New York City or Northern New Jersey)Responsibilities:· Lead architecture and design discussions for scalable, high-performance backend systems· Develop and maintain backend services using Python and modern frameworks such as Django, FastAPI, and Flask· Design and build RESTful APIs and service-oriented applications that support business-critical platforms· Establish engineering best practices through code reviews, technical leadership, and mentorship of junior team members· Collaborate closely with product, engineering, and business stakeholders to gather requirements and deliver solutions· Participate in Agile development processes including sprint planning, backlog grooming, and daily standupsRequired Skills & Experience:· 5+ years of professional software engineering experience with a strong focus on backend development· Expert-level proficiency with Python and experience building production applications using Django, FastAPI, Flask, or similar frameworks· Experience designing and implementing service-oriented or microservices-based architectures· Strong experience building and consuming RESTful APIs· Hands-on experience with AWS cloud services and modern cloud-native development practices· Experience working with relational databases such as PostgreSQL· Experience with Docker, Kubernetes, CI/CD pipelines, and automated testing frameworks· Strong understanding of software engineering fundamentals, system design, and Agile development methodologies· Experience supporting high-traffic, high-availability applications is highly preferredCompensation:· Base Salary: $160,000 – $170,000 + 10% bonusAdditional Information:· Hybrid position requiring 2-3 days per week onsite in either Northern New Jersey or New York City· Candidates must be authorized to work in the United States — no visa sponsorship available· Experience with AWS messaging technologies, NoSQL databases, and distributed systems is a plus· Opportunity to work on highly scalable systems processing significant transaction and messaging volumeFor more information or to apply, contact Ryan Dwyer at View email address on click.appcast.io