Senior Software Engineer

Job Title: Senior Software Engineer

Location: Midtown, NYC

Work Model: Hybrid — 3 days/week in office

About the Role

We’re looking for a Senior Software Engineer for a client to join the engineering team and take ownership of production backend systems and data pipelines.

This is a high-ownership role with a clear path toward Lead Engineer within 3–6 months for the right person.

What You’ll Do

• Design, build, and maintain production backend services and data pipelines.

• Develop serverless applications using Python, AWS Lambda, Step Functions, and related AWS services.

• Own backend systems end-to-end, from architecture and implementation through deployment and ongoing improvement.

• Make thoughtful architectural and technical decisions as the product and engineering organization scales.

• Work directly with customers to understand their workflows, clarify requirements, and turn those needs into shipped software.

• Use AI coding tools and agentic development workflows to improve development speed and productivity.

• Contribute to the frontend when needed, with an approximate 90% backend / 10% frontend split.

• Mentor junior engineers and help establish strong engineering practices.

• Collaborate closely with product and other teams to deliver high-quality solutions.

• Take increasing ownership and responsibility with the opportunity to progress into a Lead Engineer role.

What We’re Looking For Must-Haves

• 5+ years of backend software engineering experience.

• Experience as a founding engineer or early engineering hire at a B2B SaaS startup.

• Proven experience owning and delivering production backend systems end-to-end.

• Previous experience as a technical lead, mentor, or senior technical contributor.

• Advanced Python skills with significant production backend experience.

• Strong experience with AWS, particularly Lambda, Step Functions, and serverless architectures.

• Hands-on experience with AI coding tools and agentic development workflows.

• Product-minded approach with the ability and willingness to work directly with customers.

• Based in New York City and able to work from our Midtown office 3 days per week.

• US Citizen or Green Card holder.

Strong Signals

The following would be especially valuable:

• Was among the first ~10 employees at a seed or Series A startup.

• Experience working at an AI/ML startup or similarly high-velocity technical environment.

• Experience with data platforms, knowledge graphs, or complex data systems.

• Comfortable contributing to React applications when needed.

• Experience in the construction/AEC industry.

• BS in Computer Science, Engineering, or another STEM discipline.

Pay: $220,000.00 - $270,000.00 per year

Work Location: Hybrid remote in Bronx, NY 10463