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  3. Senior Backend Engineer
Affinity logo

Senior Backend Engineer

Affinity
Location not specified
Full Time
Posted February 19, 2026
Not Specified
Apply Now

Application opens on company website

Job Description

A Senior Backend Engineer role focused on developing and maintaining scalable, high-performance backend systems using Ruby and PostgreSQL, collaborating across teams, mentoring engineers, and applying modern AI practices to enhance the company's relationship intelligence platform.

Key Responsibilities

  • Develop and iterate on core backend data models and APIs with a focus on performance and scalability
  • Mentor engineering team members in designing robust and scalable systems
  • Apply modern AI best practices to development processes and product features
  • Collaborate with cross-functional teams including product and design
  • Identify and prioritize technical investments and contribute to the technical roadmap
  • Lead technical projects by defining scope, milestones, and distributing work across the team

Requirements

  • Have 5 years of experience as a software engineer, including familiarity with the different pieces of technology involved in building modern web applications.
  • Experience writing server-side code leveraging modern Object-Oriented Programming (OOP) practices using Ruby and PostgreSQL.
  • Strong understanding of relational databases and the ability to design and implement systems that scale and avoid performance bottlenecks.
  • Experience solving high-scale challenges and working on large migration projects in the areas of data modeling and APIs.
  • Ability to set up and own core systems with observability and long-term support and maintenance in mind.
  • Comfortable working collaboratively within engineering teams and as part of a cross-functional team.
  • Proficiency in iterating on current data models and APIs with performance and scalability in mind for current and future usage.
  • Ability to act as a project lead by owning technical solutions and outcomes, collaborating closely with product, design, and technical leads to define project scope and milestones, and distributing work across the team.
  • Experience applying modern AI best practices to both the development process and product features.

Benefits & Perks

Health Benefits: coverage for employee and dependents, flexible personal sick days
Retirement Planning: RRSP plan
Learning Development: annual education budget and comprehensive learning and development program
Wellness Support: monthly reimbursements for home internet, meals, wellness memberships, and equipment
Team Connection: virtual team-building activities and socials
Compensation/salary range: approximately 148,750 to 180,000 CAD

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