Founding Engineer

Combine | Global Recruitment

. Build the product end to end on the existing stack of Next.js, React, TypeScript, and a .NET C# Excel control layer .

Posted 10/15/2026full-timeRemote • United States, Brazil, Argentina, ChileSeniorLeadWebsite

Tech Stack

Tools & technologies

JavaScriptNext.jsReactTypeScript.NET

About the role

Key responsibilities & impact

Build the product end to end on the existing stack of Next.js, React, TypeScript, and a .NET C# Excel control layer
Design financial data models, calculation orchestration, source-system integrations, and scenario and version controls
Deliver traceable and reproducible outputs with reconciliation and review where required
Deliver clear, responsive interfaces for complex financial workflows
Own and evolve architecture, services, data layer, infrastructure as code, deployment environments, observability, and CI/CD
Make build-versus-buy decisions and lead technical planning and execution
Strengthen testing, performance, recovery, and release practices as deployments and usage grow
Turn customer requirements into shared capabilities, configuration, or bounded extensions
Own authentication, authorization, tenant isolation, encryption, access control, and audit trails for confidential customer financial data
Maintain production operation through monitoring, backups, incident response, and controlled deployment and rollback
Partner with the CEO and financial modelers to translate customer requirements into technical designs, implementation plans, and software with clear acceptance criteria
Own engineering delivery and production readiness
Guide and mentor the engineering team, maintain code-review and delivery standards, and help assess future engineering hires
Deliver remaining product and platform capabilities required to serve clients #3 and #4 in production
Prepare Inframodel to scale across the market in 2027 through maintainable architecture, production reliability, and engineering practices supporting a growing customer base and team

Requirements

What you’ll need

Experience building and shipping financial-modeling-oriented enterprise SaaS
10+ years building and shipping production software
Demonstrated ownership of architecture, infrastructure, and production engineering, including infrastructure as code
Deep experience with data modeling, calculation orchestration, integrations, versioning, and production reliability
Strong full-stack command of TypeScript, React, and Next.js, with sound product and interface judgment
Experience protecting sensitive financial data in enterprise software
Experience building new products or substantial capabilities in a small team
Professional-level English and the ability to clearly explain technical decisions and tradeoffs to the founder and internal team
Ability to independently own architecture, infrastructure, and engineering execution without requiring senior technical oversight
Background in complex financial software, enterprise financial modeling, planning and forecasting, or fintech platforms where financial calculation and scenario logic are core
Energy, infrastructure, or project-finance experience is nice to have
Experience with calculation engines, Excel automation, model parsing, or governed spreadsheet integration is nice to have
Experience scaling enterprise deployments through shared product capabilities and configuration is nice to have
Track record as an early engineer whose systems continued to operate and evolve is nice to have
Experience applying AI to financial workflows with source traceability, validation, and human review is nice to have

Benefits

Comp & perks

Competitive cash + equity compensation; tailored to the candidate