Senior Full-Stack Engineer to Take Over Production SaaS (NestJS / React)

Responsibilities

Take over day-to-day ownership of an existing production SaaS codebase Work with the founder and fractional technical architect to: review architecture decisions stabilise and harden the platform gradually improve code quality and test coverage Deliver incremental product features and UX improvements

Ensure strong standards around: security access control data integrity auditability

Support early enterprise pilots and feedback-driven iteration

Collaborate with external vendors where needed (design, infra, audits)

Requirements

5–10+ years of professional experience Experience taking a SaaS product from MVP to production Comfortable inheriting and improving an existing codebase Thinks in terms of systems, not just features Communicates clearly with non-technical founders Pragmatic, structured, and calm under ambiguity

Preferred Qualifications

Experience with NestJS and React Experience with multi-tenant SaaS architecture Familiarity with enterprise security standards (GDPR, data isolation, logging)

Benefits

Competitive hourly rate for senior talent Opportunity for long-term contract extension

About the Company

We are a B2B SaaS startup building a data-centric enterprise platform for corporate treasury and investor relations teams.