Senior / Staff Engineer

InCommon; United States; Remote; USD 150,000 - 300,000; Full time

Job summary

InCommon is seeking a Senior Full Stack Engineer to own features across the stack, from the Postgres schema and Node services to the React interface, ensuring production performance and correctness on real loans.

You will contribute end-to-end design decisions, collaborate with product and customers, and build scalable backend services on AWS with TypeScript. This role emphasizes ownership and delivering reliable software for a lending platform.

Qualifications

• 10+ years in software engineering, with 5+ at senior level.
• Hands-on production work in full-stack TypeScript.
• Strong experience with Node.js/Express and PostgreSQL on AWS.
• Familiar with GraphQL (Apollo) and Terraform IaC.
• Proven system design with measurable scale, latency, and reliability.
• Hands-on coder who collaborates with product and customers.

Responsibilities

• Build and ship features across the full stack in TypeScript.
• Design and scale backend services and data models on Postgres and AWS.
• Translate lending workflows into reliable, maintainable code.
• Maintain integrations with third-party services and APIs.
• Make design tradeoffs for throughput, latency, and failure modes.
• Operate and monitor what you build, including on-call duties.
• Work with product and customers to ship usable features.

Skills

Full-stack TypeScript

Node.js/Express

PostgreSQL

AWS

GraphQL (Apollo)

Terraform

System design

On-call / Production troubleshooting

Customer collaboration

Tools

PostgreSQL

AWS

Terraform

GitHub

Job description

Senior Full Stack Engineer (TypeScript) 10+ years

Fintech / Lending Technology

Remote, US

Compensation - 150K-300K USD

You must be authorized to work in the US. We can support visa transfers only, not new sponsorship.

InCommon is hiring on behalf of a Series B, venture-backed lending technology company building software that helps lenders originate and manage loans faster and with fewer errors. The company is scaling quickly as we onboard larger customers.

About the role

We're hiring senior engineers who like owning problems end to end. You'll build product features across the stack, from the Postgres schema and Node services to the React interface, and you'll be responsible for how they perform in production.

You'll be working on a platform where correctness matters. The software handles real loans, real money and complex business rules, and it integrates with a lot of external systems.

What you'll do

• Build and ship features across the full stack in TypeScript
• Design and scale backend services and data models on Postgres and AWS
• Translate complex lending workflows and rules into reliable, maintainable code
• Build and maintain integrations with third-party services and APIs
• Make system design decisions and own the tradeoffs: throughput, latency, failure modes
• Operate what you build: monitoring, debugging and on-call
• Work closely with product and customers to ship things that get used

What we're looking for

• 10+ years of software engineering experience, with at least 5 at a senior level
• Recent, hands-on production experience in full-stack TypeScript
• Deep experience with Node.js/Express and PostgreSQL on AWS
• Experience with GraphQL (Apollo) and infrastructure as code (Terraform)
• A track record of designing systems and explaining them with real numbers (scale, latency, reliability)
• A hands-on engineer who spends most of their time writing code
• Experience at a product company, ideally a high-growth startup or a strong tech company

Nice to have

• Experience in lending, mortgage, fintech or other regulated products
• Background in distributed systems, event-driven architecture or Kafka
• Security and compliance exposure (e.g. SOC2)
• Experience building with LLMs or AI agents
• An active GitHub or public engineering work