Senior Software Engineer, Backend (Partner Merchant Interface)

Affirm; Halifax; On-site; CAD 153,000 - 213,000; Full time

Benefits offered by this job

Health coverage

Tech stipends

Generous time off

Stock purchase plan

Job summary

Affim is a remote-first company hiring a Software Engineer for the Partner Merchant Interfaces - Integration team. You will help build APIs used by partners and merchants, including top names like Amazon and Stripe, while maintaining reliability and performance.

The role emphasizes collaboration, code quality, and ownership of growth. This position is open to Canada-based candidates, with a remote-first setup and opportunities for in-person onboarding where available.

Qualifications

• Experience designing, developing and launching backend systems at scale.
• Proficient in Python or Kotlin.
• Familiar with distributed systems and AWS, MySQL, Kubernetes.
• Ability to navigate large codebases and perform thoughtful code reviews.

Responsibilities

• Collaborate with the team to contribute to project goals.
• Communicate risks and trade-offs with stakeholders.
• Balance speed and quality to meet business goals and protect systems.
• Engage in team growth and development activities.

Skills

Python

Kotlin

Distributed systems

AWS

MySQL

Kubernetes

Code reviews

Tools

AWS

MySQL

Kubernetes

Job description

At Affim, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most.

The Partner Merchant Interfaces - Integration team within Decisions Foundations is growing and we are looking for a Software Engineer. You will be part of a fast paced team which is responsible for the APIs that Partners and Merchants use to integrate with Affim, and also power some of our top partners like Amazon and Stripe.

What You'll Do

• With the support of your team, you will work on tasks that contribute to the team's projects and goals.
• You will work collaboratively and proactively with your team and stakeholders, bringing them along for your work and helping to create visibility and dialog regarding the risks and trade-offs related to your work.
• You will strike the right balance of speed and quality in your work, ensuring that we hit our business goals while protecting our systems from downtime.
• You will contribute to a sense of community on your team by engaging in growth and development activities.

What We Look For

• You have previous work or internship experience designing, developing and launching backend systems at scale and are experienced using one of Python or Kotlin.
• You are familiar with the building blocks of distributed systems, and the technologies like AWS, MySQL and Kubernetes.
• You have mastered taking a simple problem or business scenario into a solution that interacts with multiple software components, and executing on it by writing clear, easily understood, well tested and extensible code.
• You are comfortable navigating a large code base, debugging others' code, and providing feedback to other engineers through code reviews.
• Your experience demonstrates that you take ownership of your growth, proactively seeking feedback from your team, your manager, and your stakeholders.
• You have strong verbal and written communication skills that support effective collaboration with our global engineering team.

Base Pay Grade - N

Equity Grade - 6

Employees new to Affim typically come in at the start of the pay range. Affim focuses on providing a simple and transparent pay structure which is based on a variety of factors, including location, experience and job-related skills.

Base pay is part of a total compensation package that may include monthly stipends for health, wellness and tech spending, and benefits (including 100% subsidized medical coverage, dental and vision for you and your dependents). In addition, the employees may be eligible for equity rewards offered by Affim Holdings, Inc. (parent company).

CAN base pay range per year: $153,000 - $213,000

This remote role is open only to candidates residing in Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland and Labrador, Nova Scotia, Ontario, Prince Edward Island, or Saskatchewan

LI-Remote

Remote-first with flexibility built in

Affim is proud to be a remote-first company. Most roles can be done from almost anywhere within the country of employment. Some positions may occasionally require in-person work at an Affim office, and a few are office-based due to the nature of the work. All new hires will be invited to attend an in-person onboarding experience.

Benefits Designed For You

• Health coverage at no cost: We cover 100% of premiums for employees and their dependents.
• Spending stipends: Monthly stipends support your tech setup, and the ability to choose health and wellness options that are right for you.
• Time off to recharge: Flexible time off and generous holiday calendars help you rest when you need to.
• Own a piece of what you build: Our employee stock purchase plan (ESPP) lets you buy Affim stock at a discount.

We’re committed to providing an inclusive interview process, including accommodations for candidates with disabilities. If you need support, we’re happy to help.

For positions based in San Francisco or Los Angeles: Affim considers qualified applicants with arrest and conviction records, as required by law.