Flexcompute Inc.

Sep 30, 2026

Senior Backend Software Engineer

United States

Watertown, Massachusetts, United States

PythonJavaAWSDockerKubernetesC++Terraform

About the opportunity

Flexcompute is leading the transformation of engineering simulation with our revolutionary ultra-fast simulation technology. Our flagship products, including the industry-leading Computational Fluid Dynamics (CFD) software Flow360 and electromagnetic simulation software Tidy3D, are reshaping how simulations are conducted across diverse sectors. Founded by visionaries from Stanford and MIT and supported by top-tier venture capital firms, we are a rapidly growing team dedicated to breaking boundaries and challenging the norms of the multi-billion-dollar engineering simulation market.

Role Overview

We are looking for a Backend Software Engineer to help us design and implement scalable solutions that meet the growing demands of our advanced EM simulation platform.

The ideal candidate has expertise in high-performance computing (HPC), infrastructure, web API design, and systems design. Additionally, the candidate will be help us enhance our data management, frontend-backend API unification, and cloud integration.

Join Us

By joining Flexcompute, you’ll be at the heart of a movement set to redefine the engineering simulation industry. You will play a key role in shaping the future, where our innovations in simulation technology pave the way for groundbreaking advancements. We are committed to fostering an innovative and collaborative culture where boundaries of possibility are re-imagined, driven by creativity, expertise, and a shared vision of transforming the technological landscape.

Key Responsibilities

Contribute to general software development efforts, such as API unification, simulation data management (e.g., caching, syncing, storage), and scripting improvements.

Collaborate with EM and infrastructure teams to implement simulation-specific solutions, including enhancements to back-end/scheduler integrations and Python front-end functionality.

Improve our task pipelines through an innovative design for a web API in a multi-physical simulation context.

Develop and maintain hybrid cloud compute and storage solutions, integrating on-premise HPC systems with modern cloud platforms.

Optimize and manage high-performance computing clusters equipped with high-speed interconnects.

Minimum requirements

Education: Bachelor’s degree or higher in computer science or computer engineering.

Technical Skills

Professional experience developing backend systems using Java, Python, and/or C++

Strong experience with AWS or similar cloud platforms (compute, storage, networking, IAM, infrastructure automation)

Expertise in backend service development and web API architecture

Hands-on experience with containerization and orchestration (Docker, Kubernetes)

Experience designing and operating distributed systems in production environments

Strong Linux systems knowledge and infrastructure troubleshooting skills

Experience with infrastructure automation and configuration management (e.g., Terraform, Ansible, or similar tools)

Familiarity with monitoring, logging, and observability tooling

Understanding of networking fundamentals and backend security best practices

Innovative Mindset: Ability to learn quickly, adapt to new challenges, and innovate in a fast-paced startup environment.

Bonus Skills

Experience integrating cloud platforms with HPC environments or large compute clusters

Familiarity with job schedulers (e.g., Slurm), distributed compute frameworks, or large-scale data pipelines

Experience supporting scientific computing or simulation platforms

Knowledge of GPU infrastructure and resource scheduling

Experience building developer platforms or internal infrastructure tooling

Example Projects

Architect and deploy Kubernetes-based infrastructure to run distributed simulation workloads

Design and implement scalable web APIs for simulation job orchestration and data access

Build CI/CD pipelines and infrastructure-as-code systems for reproducible deployments

Develop hybrid cloud solutions connecting on-prem HPC clusters with AWS compute and storage

Implement monitoring and observability systems to track simulation performance and reliability

Improve platform scalability to support growing user traffic and compute demand

Design secure service architectures, authentication, and licensing systems

Optimize infrastructure utilization across CPU and GPU resources

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.

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Senior Backend Software Engineer

About the opportunity

Role Overview

Join Us

Key Responsibilities

Minimum requirements

Technical Skills

Bonus Skills

Example Projects

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