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Sr. Back-end Developer (Ruby)

Are you interested in being a part of an agile and exciting environment with driven, talented and passionate people? Do you have strong backend skills and have worked with Ruby on Rails? Are you keen on learning and sharing your knowledge? Are you experienced in leading projects, communicating effectively and have a collaborative spirit? 

We at Samsung Ads l AdGear handle ~1,000,000 requests per second. We have a maximum of 100ms to parse an ad bid request, query our databases to find the most appropriate ad for that end-user, decide on our bid price, and respond. We manage an inventory of ~10,000 active ads for ~250 concurrent campaigns driving tens of millions of dollars in monthly revenue; generating ~600,000,000 ad impressions daily. We support ad operators from all around the world in multiple currencies and languages and we are looking to add a Senior back-end developer (Ruby), to the team.

What you'll do

  • Work with an experienced and passionate agile team within an engineering organization that values a strong technical culture
  • Design, build, and improve core services and API gateways for our demand-side platform (DSP)
  • Design and develop new services for our next generation platform.
  • Ensure service performance, scalability and reliability
  • Ensure high-quality delivery through automated testing and deployment pipelines
  • Enrich our tech community by participating in Guilds and Community of Practice group

We value a broad knowledge base and encourage our employees to develop a well-rounded skill set and be comfortable contributing to any part of the codebase.

What we are looking for

  • 5+ years of backend development experience preferably with Ruby 
  • 2+ years building Ruby on Rails applications with relational databases
  • Experience working with CI/CD pipelines
  • Experience working with Docker and Kubernetes
  • Experience using SQL
  • Experience building, testing and maintaining HTTP APIs
  • Strong database skills 
  • Excellent verbal and written communication skills. French is an asset
  • Strong problem-solving skills and a can-do attitude
  • A passion for working as a team and mentoring other developers

Nice to Haves:

  • You have prior experience building and designing Microservices 
  • You have prior experience using GraphQL APIs, SQL and PostgresSQL
  • You have experience working with CI/CD pipelines coupled with working with Docker and Kubernetes
  • You are familiar with AWS 
  • You’ve previously worked in AdTech or are familiar with the Ad Tech industry 



  • 100% Company-paid comprehensive health & dental coverage, access to a virtual care platform (wellness, medical & nutrition), employee assistance program and Personal & Healthcare spending account with Sun Life
  • Competitive compensation package, including performance incentive bonus plan based on company, team and personal objectives
  • Generous vacation days with additional flex days
  • Group RRSP Matching Program up to 5%


  • Monthly virtual social committee-lead activities (games night, happy hour, health challenges, etc.)
  • Virtual companies get togethers (demo days, Town Halls, and more!) & yoga once per week
  • Open source days for software engineers
  • Employee Referral Program
  • Perkopolis website with great rebates, coupons and promotions
  • Amazing discounts through Samsung Employee Discounts website

This role will be based in Montreal/Toronto or Remote Canada. Any roles based in Montreal/Toronto will follow a hybrid work model. This role will be reporting into the Engineering Manager for the team. 

Life at SamsungAds l AdGear…
We are proud to have built a world-class organization, grounded in an entrepreneurial and collaborative spirit. Working at Samsung Ads offers one of the best environments in the industry to learn just how fast you can grow, how much you can achieve, and how good you can be. We thrive on problem-solving, breaking new ground, and enjoying every part of the journey.

If you're interested in joining a rapidly growing team working to build an outstanding, world-class advertising organization with a relentless focus on design and customer experience, you've come to the right place and apply now or share with a friend!

Samsung Ads l AdGear is an advanced Advertising Technology Company in rapid growth that focuses on enabling brands to connect with Samsung TV audiences as they are exposed to digital media by using the industry’s most comprehensive data to build the world’s smartest connected audience platform. Being part of an international company such as Samsung and doing business around the world means that we get to work on big complex projects with stakeholders and teams located around the globe. 

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