Senior Backend Software Engineer

Flexcompute Inc.; Boston (MA); Hybrid; USD 85,000 - 100,000; Full time

Benefits offered by this job

Equity

Remote work in Poland

Travel for team gatherings

Learning sponsorship

AI tools budget

Fitness benefit

Job summary

Flexcompute is hiring a Backend Software Engineer to design and build scalable backend services for our EM simulation platform, Flow360 and Tidy3D. You will contribute to API unification, data management, and hybrid cloud integration, working with HPC systems and modern cloud platforms.

The ideal candidate has strong Java/Python/C++ backend experience, solid AWS knowledge, and hands-on containerization with Docker/Kubernetes.

Qualifications

• Bachelor’s degree or higher in computer science or computer engineering; postgraduate degree or strong research/competitions is a plus.
• Professional experience developing backend systems using Java, Python, and/or C++.
• Strong experience with AWS or similar cloud platforms (compute, storage, networking, IAM, infra 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).
• Familiarity with monitoring, logging, observability tooling.
• Understanding of networking fundamentals and backend security best practices.

Responsibilities

• Contribute to API unification and data management for large-scale simulations.
• Collaborate with EM and infra teams to improve back-end integrations and Python frontend tooling.
• Design scalable web APIs for job orchestration in multi-physical simulations.
• Develop hybrid cloud compute and storage solutions with on-prem HPC and cloud platforms.
• Optimize HPC clusters with high-speed interconnects.

Skills

Java

Python

C++

AWS cloud

Backend APIs

Web API design

Docker & Kubernetes

Distributed systems

Linux

Infrastructure automation

Monitoring & observability

Networking & security

Education

Bachelor's degree in CS/CE

Postgraduate degree / research

Tools

Docker

Kubernetes

Terraform

Ansible

Job description

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.

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.

Education: Bachelor’s degree or higher in computer science or computer engineering. A postgraduate degree, published research, or a strong record in competitive programming is a plus.

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 distributed task queues and job dispatch, 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

• Design and build the job dispatch and scheduling pipeline that runs large simulation workloads across hybrid cloud and on-premise environments
• 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

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.

• Competitive compensation with equity of a fast-growing startup. The range for this role is USD 85,000 to 100,000 per year, depending on experience.
• Remote within Poland, on Polish working hours with about six hours of overlap with our Boston team.
• Annual travel support for team gatherings in Boston.
• Learning sponsorship, an AI tools budget and a fitness benefit.
• Friendly, thoughtful, and intelligent coworkers.