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Senior Software Engineer, Applications

New York💼 Full-time💰 $188,000–$188,000🗓 2026-09-21 → 2026-09-26

Core

Senior full-stack engineer building the Northstar financial wellness platform, enabling employees to make confident decisions about money through personalized digital tools and adviser workflows.

Role type

Senior IC full-stack software engineer

Builds

Full-stack features for the Northstar product including backend services, data models, and client/adviser interfaces

Domain

Fintech / Financial wellness

Deliverable

production ML models | product features

Required skills

Full-stack development, Rails, React, Python, TypeScript, Relational databases (Postgres), Cloud infrastructure (AWS, Heroku), Service ownership (monitoring, on-call), Application security, Technical debt management, Architecture design

Preferred skills

Fintech/wealth management/insurance domain experience, HIPAA/SOC 2 compliance knowledge, AI tooling integration, Building tools for specialized user groups

Technologies

Rails, React, Python, TypeScript, Postgres, AWS, Heroku, Datadog

Responsibilities

Build and own full-stack features across the Northstar product; Identify and execute architecture changes; Design data models and workflows for financial planning; Proactively identify and address technical debt; Partner with advisers and product teams to translate workflows into software; Identify security concerns in code review; Evaluate new AI libraries for the codebase; Own services end-to-end from design through deployment and on-call; Mentor other engineers and influence cross-team decisions

Seniority

Senior, hands-on IC with mentorship responsibilities

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