Software Engineer in Security

Flexcompute Inc.

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Watertown, Massachusetts, US on site Until 8/22/2026 3+ years exp H-1B sponsor history First posted June 18, 2026 Last posted June 18, 2026
Job description

Flexcompute is a cutting-edge technology startup that specializes in ultra-fast simulation technology. Our products are utilized by companies in designing and optimizing technology products, with applications ranging from designing airplanes and cars to wind turbines and quantum computing chips. Our customer base includes both household names and startups in emerging industries. Our company was founded by world-renowned leaders in simulation technology from Stanford University and MIT. Backed by top VC firms, we are poised to disrupt the billion-dollar engineering simulation industry with our fast-growing trajectory.

We are seeking a hands-on software engineer to work on security projects across our web application, AWS, and on-premises high-performance computing environment. This is a crucial role in supporting the company’s growth into regulated industries.

What you will do

  • Build and integrate technical security features and controls into our web application and internal administration platforms
  • Implement and maintain AWS security controls, including IAM, encryption, backups, logging, monitoring, and alerting
  • Securely orchestrate customer jobs and data across cloud and HPC environments
  • Build and respond to alerts from security logs covering both cloud and on-premises hardware
  • Deploy and manage vulnerability scanning tooling; collaborate with developers to triage and remediate findings
  • Fix and validate remediations of penetration test findings
  • Harden and secure on-premises HPC infrastructure
  • Maintain and improve compliance tooling integrations, identify gaps, and drive remediation efforts

Requirements

Strong hands-on engineering experience in at least one of:

  • Backend software engineering
  • DevOps / Infrastructure engineering
  • Security engineering, with a focus on building than maintenance

Experience securing cloud environments, ideally AWS

Familiarity with infrastructure-as-code (e.g., Terraform)

Experience deploying or working with CI/CD pipelines

Working knowledge of application and infrastructure security fundamentals

Must be a US Citizen or Green Card Holder

What We're Looking For

We are looking for backend software engineers, devops engineers, or security engineers, as long as you are hands on and are interested in security. You will join a team of infrastructure engineers in an engineering-first company which is at the frontiers of HPC-based simulations. This is a role primarily focused on writing code.

Ideally you have experience in one or more of: building NIST 800-171 or NIST 800-53, compliance automation platforms, infrastructure-as-code, AWS security, developing CI/CD pipelines

Benefits

  • Competitive compensation with equity of a fast-growing startup.
  • Medical, dental, and vision health insurance.
  • 401(k) Contribution.
  • Gym allowance.
  • Friendly, thoughtful, and intelligent coworkers.
About this role

Summary

Develop security features, manage cloud and HPC security, automate compliance, and respond to security alerts.

Job title

Software Engineer in Security

Experience level

3+ years

Minimum experience

3+ years exp

Industry

software

Location requirements

On-site in Watertown, MA, remote work not specified.

Salary

Not specified

Visa sponsorship

H-1B sponsor history

Management role

No

Skills & keywords

Required skills

software engineeringsecurity engineeringAWS securityinfrastructure-as-codeCI/CD

Preferred skills

building NIST 800-171building NIST 800-53compliance automation platformsTerraform

Specializations

security automationcloud securityinfrastructure-as-codeAWS securityHPC security
Locations

Structured locations inferred from the posting.

Watertown, MA, USA

On-site City