Software Engineer - Node / React
Simplex, Inc.
New York, NY, United States
23 days ago
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Role details
Contract type
Permanent contract
Employment type
Full-time (> 32 hours)
Experience level
Expert
Experience required
5 years minimum
Working hours
Regular working hours
Job source
Tech stack
Application Programming Interfaces (APIs)
Amazon Web Services
Big Data
Database Models
Programming Tools
PostgreSQL
Node.Js
Next.js
Software Engineering
TypeScript
Virtual Memory
Cloud Platform System
+8 more
ReactJS
AWS Lambda
Agentic-AI
Event Driven Architecture
Material UI
Information Technology
Terraform
Serverless Computing
Job description
- Build and own new user-facing features end-to-end, from database models to UI components
- Continuously improve observability across existing systems - analytics, monitoring, and alerting
- Collaborate with product and engineering to architect key differentiators, including embedded fintech products and AI agents to help merchants manage their stores
- Build CI/CD pipelines and developer tooling (e.g., feature environments) that increase development velocity
- Help shape engineering processes to support building a world-class product
Tech Stack
Familiarity with every tool isn’t required, but candidates should have the foundational knowledge to understand what powers them under the hood:
- Node
- React
- Next.js deployed on Vercel
- Typescript
- AWS (particularly RDS)
- PostgreSQL
- Terraform or equivalent infrastructure-as-code tooling
Requirements
As a Senior Engineer, you’ll be expected to bring strong engineering principles backed by at least 5 years of experience. The ideal candidate:
- Has a strong computer science and programming foundation - has read Designing Data-Intensive Applications
- Is a craftsperson who deeply cares about the quality of their output and understands the long-term costs of shortcuts
- Builds with the end user and longevity in mind - knows how to design abstractions and APIs that are a pleasure for both customers and teammates to use
- Communicates effectively to drive clarity and alignment across the organization - able to translate product requirements into technical challenges and vice versa
- Is genuinely passionate about software engineering and dives deep into topics that interest them, whether that’s the Node.js Event Loop or how virtual memory works at the OS level
- Has hands-on experience with serverless architectures - comfortable designing and deploying serverless functions and event-driven systems in cloud environments (e.g., AWS Lambda, Vercel Edge Functions, or equivalent)
Benefits & conditions
- Salary: $180K-$220K + meaningful equity, depending on experience
- Unlimited PTO
- Full benefits package: medical, dental, vision, 401(k), transportation, and more
Interview Process
- One or two 30-minute introductory calls with the engineering team
- Onsite interview consisting of: 3.
- 1-hour system design exercise
- 45-minute meeting with the product team and company leadership 4. Offer
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