Senior Software Engineer (m/f/x)

Senior Software Engineer (m/f/x)

locationMunich, Germany
remoteFully remote
PublishedPublished: 24.1.2023
Software Development
Full time

We believe the future of growth is user-led. We are on a mission to build a user-led growth platform that allows any company to turn users into their most effective growth channel.

We’ve just raised €2.3m pre-seed funding led by top-tier investors, and we’re now looking for a Senior Software Engineer (m/f/x) to help us realise our committed vision.

🚀 Why join

  • Unique growth opportunity: early-stage GrowthTech start-up backed by top-tier investors like ByFounders, TinyVC and operator angels from YouTube, Personio and McMakler (2.3M€ pre-seed)
  • Shape & execute the roadmap of a product that went from inception to go-live with first customers within 8 months (Butter, Sastrify, Demodesk etc.)
  • Strong momentum: paid ad prices are skyrocketing and there is a tech downturn - SaaS companies are looking for more cost-effective sales channels
  • We onboard 15 new customers every single month
  • Have the unique opportunity to apply everything you have learned to create the product development environment you would love to work in and would refer all your ex-colleagues to
  • Become a central part of an experienced and passionate co-founding team on our journey to a truly great company (ex-Twilio, ex-Pitch, ex-Typeform etc.)

🏔️ Tackle exciting tech challenges with us

  • Build a platform that is used by millions of users, ensuring high performance and data integrity
  • Build a self-serve referral experience with us that SaaS users simply love
  • Help us advance our state-of-the-art attribution model
  • Build a recommendation and multi-sharing engine with us


We are currently looking for a Senior Software Engineer (m/f/x) who will help us further develop, challenge and improve our existing product.

This is an unique growth opportunity to demonstrate your knowledge and expertise and help create a product to change the way B2B SaaS solutions sell their products.

  • Build and operate services in a production environment used by pioneering customers across the globe
  • Manage the end-to-end development of our client-facing products to build scalable UI and services
  • Collaborate cross-functionally to deliver on the broader product vision
  • Ship fast and iterate to deliver value to our customers with a strong focus on quality
  • Explore new methods and technologies to improve user experience and system performance, continuously improving and scaling in an Agile/DevOps environment
  • Support recruitment for fast-growing engineering organization


We value diverse backgrounds and encourage you to apply even if you didn't follow the traditional career path. We're always looking for individuals who can bring a new perspective to the table.

  • 5+ years of relevant industry experience in full-stack development, ideally in a (early-stage) start-up

  • Proficient in one or more modern front-end frameworks (e.g React, Angular)

  • Proficient in server-side Javascript (NodeJS) or other backend languages

  • Significant experience building scalable software systems with background in distributed systems, microservices and event-driven architectures

  • Experience designing and operating services in cloud-deployed environments (we use AWS)

  • Our stack is built on the following technologies and constantly evolving. Experience on these technologies and areas are a plus but not required:

  • Full-stack: ReactJS, NodeJS, Typescript, Nest.js

  • Cloud Web Services: AWS S3, Cloudfront, Lambda, Docker, Kinesis, DynamoDB, Redshift

  • Infrastructure as code: Terraform, Gitlab


In the end it’s all about the team and our culture. Understand why we love our job and see what it’s like to work at Cello in our People Playbook. We have some compelling perks and benefits.

  • Competitive, adjustable compensation based on your appetite between equity/cash
  • vESOPs based on the generous Index Ventures guidelines, which sets us apart from most European startups
  • Remote-first global company with local hubs. We hire the best, senior people regardless of location
  • Flexible office allowance to support your hybrid or fully-remote working model
  • Build your perfect setup to do the best work of your life. Mac/Windows, plugins, cutting-edge tech stack… Tell us what you need to be productive and we will take care of it
  • Monthly learning allowance to satisfy your thirst for growth and lifelong learning
  • Quarterly culture weeks where we come together, celebrate and set the course for the coming months. We have chosen to work remotely, but we encourage frequent face-to-face time

We are really looking forward to your application. Help us create a truly great company!