Senior Backend Engineer (Puppet)
Fireflies.ai
Software Engineering
Buenos Aires, Argentina
Posted on Sep 8, 2025
Senior Backend Engineer (Puppet)
Mumbai • Ho Chi Minh • Buenos Aires • Lagos
Engineering
Remote
Full-time
Fireflies.ai is the #1 AI teammate for meetings, trusted by over 20 million people across more than 500,000 organizations from fast-growing startups to Fortune 500 enterprises. Whether in sales, project management, marketing, operations, or product development, Fireflies is revolutionizing team collaboration by capturing knowledge, automating repetitive tasks, and enhancing productivity before, during, and after every meeting.
Recognised as a category-defining platform, Fireflies has achieved unicorn status with a valuation exceeding $1 billion. Ramp data shows Fireflies is the 6th most purchased AI platform in the US. Chances are, you’ve already seen Fireflies in action, quietly powering one of your recent meetings.
About the Role:
We are seeking a highly skilled Senior Backend Engineer with a strong background in browser automation and distributed systems. You will play a key role in designing and building automation-heavy SaaS products, leveraging cutting-edge technologies to power scalable, reliable, and secure backend systems.
Key Responsibilities:
Browser Automation:
- Develop and maintain automation frameworks using Puppeteer, Playwright, Selenium, and Chromium.
- Build tools and services that streamline browser-based testing and web data interaction.
Backend Development:
- Design, build, and maintain backend services and APIs using Node.js, Nest.js, and TypeScript.
- Work with databases such as MongoDB, Redis, and Vector DB (Milvus) for data storage, caching, and retrieval.
- Integrate and optimize AI/ML tools like LangChain, LlamaIndex, and OpenAI APIs.
- Ensure high performance, scalability, and reliability of backend systems.
Infrastructure & Deployment:
- Deploy and manage services using Kubernetes, Docker, and Google Cloud Platform (GCP).
- Implement CI/CD pipelines to accelerate development and deployment cycles.
System Architecture:
- Architect distributed systems and microservices for large-scale SaaS applications.
- Champion best practices in code quality, testing, and automation.
Qualities we look for:
- You have the raw intellectual horsepower and the ability to learn quickly
- You contribute to open source (share your GitHub)
- You have experience working on apps that have supported 10,000+ concurrent users
- You can design and build scalable infrastructure
- You have experience with real-time apps that use something like OT or CRDT (ref)
- You understand sound architecture principles and can build end-to-end
- Meaningful time spent as a Senior engineer or higher
- Passion for productivity tools and supporting power users
Values that are important to us:
- You should be a great communicator and culture maintainer
- Take a look at our culture document
- You're data-driven and customer-focused
- You value fast & incremental engineering cycles
- You maintain design excellence and minimise complexity
- You measure your results & automate when possible
- You get 10% better at something every week
- You have an internal compass and take accountability & initiative
- We value overcommunication, candid feedback and a results-driven culture
Perks and benefits:
- Competitive compensation
- Work remotely anywhere in your respective country
- Ability to move laterally within a team and grow rapidly
- Paid time off and flexible leave policy
- No boss culture
- Flexible working hours
- LGBTQ+ friendly
- Company offsites
- Tech reimbursements
About us:
At Fireflies.ai, we’re revolutionizing the way teams interact with AI in their daily work. Our inclusive culture champions security, innovation, customer experience, and growth. Backed by $19 million from top-tier investors like Canaan, Khosla Ventures, and angels from Slack, Facebook, Dropbox, Amazon, and Salesforce, Fireflies is driven by a passionate 100+ member global team spanning 20+ countries and every timezone. We’re building a world-class, global-first team, and we dogfood our product to do so.
We are an equal opportunity employer and strongly value diversity at our company because our team will be stronger with different perspectives and experiences. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.
Req ID: R5