Senior Software Engineer

About us

Spore.Bio is a deeptech start-up born in 2023, building a new paradigm in the quality control systems in Food&Beverage, Cosmetics, and Pharmaceutics factories.

After spending a lot of time in factories environments, we saw the pain it was to make sure products were safe. Traditional quality control has heavy constraints and long waiting times. To change that, we decided to build Spore.Bio, a new generation of microbiological testing.

Our team is dedicated to bringing technology and developing a cutting-edge solution, based on advanced optical and deep-learning technologies, to detect bacterial contamination within seconds.

Are you ready to revolutionize microbiology monitoring in factories? Spore Bio is seeking a Senior Software Engineer with deep backend, infrastructure, and database expertise to join our software team. You'll design, build, and operate the core systems that our scientists and clients rely on every day, from data pipelines and APIs to cloud infrastructure and database architecture.

This is a hands-on individual contributor role. You'll have significant ownership over technical decisions and will work closely with a small, high-caliber team where your contributions have direct, visible impact.

About the role

• Design and implement backend services, APIs, and data pipelines using Python
• Architect and optimize PostgreSQL databases: schema design, query performance, indexing strategies, and data modeling
• Build and maintain cloud infrastructure on AWS (EC2, RDS, S3, etc.)
• Improve system reliability, observability, and performance across our platform
• Develop and maintain CI/CD pipelines, infrastructure-as-code (Terraform), and deployment automation (Ansible)
• Collaborate with scientists, data engineers, and product stakeholders to translate complex requirements into robust technical solutions
• Participate in architecture discussions, code reviews, and technical planning
• Identify and address technical debt, security concerns, and scalability bottlenecks

About you

• 5+ years of professional software engineering experience with a strong backend focus
• Proficiency in Python and experience building production-grade services and APIs (FastAPI, Django, or similar)
• Strong PostgreSQL expertise: performance tuning, migrations, replication, and data modeling at scale
• Solid hands-on experience with AWS services and cloud-native architecture patterns
• Familiarity with containerization (Docker)
• Comfort working with CI/CD systems (GitHub Actions, GitLab CI, or similar)
• Strong understanding of networking, security best practices, and Linux systems
• Ability to work autonomously, make sound technical trade-offs, and communicate clearly
• You thrive in environments where delivery matters. You can make sound architectural decisions and move them to production without analysis paralysis.

Soft Skills & Mindset:

• Clear communicator across disciplines. You explain technical complexity simply to scientists and stakeholders, write useful documentation, and collaborate effectively without jargon
• Proactive, execution-oriented mindset: you take ownership and make things happen
• We don't expect you to know everything from day one. What matters most is your curiosity, drive to learn, and willingness to dive into challenges.

Why joining us?

• Work in an innovative and rapidly growing startup.
• Participate in exciting and impactful projects.
• Evolve in a collaborative and stimulating work environment.
• Opportunities for professional development and continuous training.

What we offer

We believe that flexibility and trust are important parts of a company. Our work environment reflects this thanks to:

Flexible remote: If you live in Paris, you can work from our office or from your place with no constraints.

On top of that, we offer many perks such as:

• A budget for remote work equipment
• A Gymlib subscription for you to stay in shape wherever you are
• Premium health insurance (Alan in France)
• A Swile card for your meals, if you are based in France
• Frequent team events and in-person gatherings every quarter!

Recruitment process

• Discovery call (30 min) A conversation with someone from the software team to get to know each other. We'll discuss your background, motivations, and what you're looking for. It's also your chance to ask anything about Spore.Bio, the team, and the role.
• Technical case study (take-home + 1 hr debrief) We'll send you a practical challenge that reflects the kind of problems you'd actually solve here. Think system design, data modeling, and building a small service. It's scoped to a few hours, not a weekend project. You'll then walk us through your approach with team members. We care about your reasoning and trade-offs, not trick questions or textbook algorithms.
• Founders interview (1 hour) A conversation with our founders about vision, culture, and how we work together. This is as much for you as it is for us. We want you to have a clear picture of where Spore.Bio is headed and whether that excites you (or not).
• Reference calls A quick chat with one or two people you've worked with before.

You might also be invited to meet other team members at the office for a lab visit and a coffee!

This is a unique opportunity for someone who thrives on curiosity and has a genuine passion for technology. If you enjoy taking on challenges and solving complex problems, this role will provide the perfect environment for growth and impact. The ideal candidate is someone who is self-driven, eager to learn, and excited to contribute to shaping the future of microbiology monitoring. Join our innovative and dynamic team, and let's make a difference together! We look forward to meeting you!