Senior Software Engineer (Python, FastAPI)
Summary
Senior backend engineer builds and scales high-volume data and messaging platforms using Python, FastAPI, and cloud-native tools for enterprise clients in a hybrid role based in NYC or Northern NJ.
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.
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 standups
Required Skills & Experience
- 7+ 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 preferred
Compensation
- Base Salary: $125,000 – $135,000
- Additional Bonus Opportunity
Additional Information
- Hybrid position requiring 2 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 volume