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26 Simplex Full Stack Software Engineer Jobs Hiring Near You

Simplex

Senior Software Engineer - Node / React

New York, NY ยท On-site

$180K - $220K/yr

Help shape engineering processes to support building a world-class product Tech Stack Familiarity ... Full benefits package: medical, dental, vision, 401(k), transportation, and more Interview Process

Simplex Inc

Controls Engineer

Springfield, IL

$80K - $100K/yr

At Simplex, we are experts at building products that meet our customers' exact requirements. The duties of the Controls Engineer will consist of creating, modifying and testing controls software to ...

Simplex

Senior Software Engineer - Node / React

New York, NY ยท On-site

$180K - $220K/yr

Help shape engineering processes to support building a world-class product Tech Stack Familiarity ... Full benefits package: medical, dental, vision, 401(k), transportation, and more Interview Process

Simplex, Inc

Controls Engineer

Springfield, IL ยท On-site

$80K - $100K/yr

At Simplex, we are experts at building products that meet our customers' exact requirements. The duties of the Controls Engineer will consist of creating, modifying and testing controls software to ...

Simplex

Senior Applied AI Engineer - Applied AI

New York, NY ยท On-site

$220K - $300K/yr

Our client is a Series A point-of-sale software company in NYC. They move fast and ship daily. AI ... In-depth experience with the full AI lifecycle: data analysis, rigorous evaluation, and ongoing ...

New

Simplex

Senior Applied AI Engineer - Applied AI

New York, NY ยท On-site

$220K - $300K/yr

Our client is a Series A point-of-sale software company in NYC. They move fast and ship daily. AI ... In-depth experience with the full AI lifecycle: data analysis, rigorous evaluation, and ongoing ...

New

Simplex

Senior Applied AI Engineer - Applied AI

New York, NY ยท On-site

$220K - $300K/yr

Our client is a Series A point-of-sale software company in NYC. They move fast and ship daily. AI ... In-depth experience with the full AI lifecycle: data analysis, rigorous evaluation, and ongoing ...

New

Simplex Inc

Mechanical Engineer

Springfield, IL

$75K - $100K/yr

Accurately enter and manage design information within proprietary software systems This is not ... Engineering * Strong attention to detail * Thorough understanding of mathematics and mechanical ...

Simplex, Inc

Mechanical Engineer

Springfield, IL ยท On-site

$75K - $100K/yr

Accurately enter and manage design information within proprietary software systems This is not ... Engineering * Strong attention to detail * Thorough understanding of mathematics and mechanical ...

Simplex

Contract IT Support Engineer

Hoffman Estates, IL ยท On-site

$40 - $45/hr

What is required is a polished, service-minded IT Support Engineer to support our Hoffman Estates ... Administer and support Google Workspace, Zoom, Slack, Orchard Software and other core SaaS tools ...

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Simplex Jobs Information

What makes Simplex an attractive place to work?

Simplex is a well-established company in the industry, known for its commitment to delivering high-quality solutions and services. The company's workplace is characterized by a culture of innovation, collaboration, and stability, with opportunities for employees to work on diverse projects and contribute to the company's growth. Joining Simplex can provide professionals with a chance to make a meaningful impact, develop their skills, and advance their careers in a dynamic and supportive environment.

What other companies are hiring for Full Stack Software Engineer jobs?

What are the most popular jobs at Simplex?

What are the most popular categories at Simplex?

Infographic showing various Full Stack Software Engineer job openings at Simplex in the United States as of August 2026, with employment types broken down into 85% Full Time, 12% Contract, and 3% Nights. Highlights an 85% Physical, 9% Hybrid, and 6% Remote job distribution.

Senior Software Engineer - Node / React

Simplex

New York, NY

$180K - $220K/yr

Full-time

Medical, Dental, Vision, Retirement, PTO

Re-posted 4 days ago

Job description

Our client is a fast-growing, venture-backed technology company that has built a modernized Point-of-Sale (POS) platform purpose-built for a niche industry. Two years in, they have achieved meaningful scale - serving 150+ multi-location enterprise customers with a system that operates around the clock across multiple time zones, acting as the core platform for procurement, transactions, and reporting.

They work fully in-person, 5 days a week, out of their office in the Flatiron district of New York City. Relocation assistance and visa sponsorship are not available at this time.

Who They're Looking For

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)

What You'll Work On

  • 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

Compensation & Benefits

  • Salary: $180K-$220K + meaningful equity, depending on experience
  • Unlimited PTO
  • Full benefits package: medical, dental, vision, 401(k), transportation, and more

Interview Process

  1. One or two 30-minute introductory calls with the engineering team
  2. Onsite interview consisting of:
    • 1-hour system design exercise
    • 45-minute meeting with the product team and company leadership
  4. Offer

Apply