Senior Software Engineer, Backend (Marketing & Privacy Engineering)

Affirm; London; Remote; CAD 153,000 - 213,000; Full time

Benefits offered by this job

Health coverage for you and dependents

Monthly stipends for tech setup

ESPP stock program

Flexible time off

Job summary

Affirm is seeking a Senior Software Engineer to own backend systems and measurement pipelines that connect paid media, SEO, and growth channels to signups and GMV. You’ll work across data engineering, marketing tech, and product teams to ensure consent, tagging, and identity data are integrated from the start.

The role emphasizes building reliable pipelines, identity resolution, attribution, and scalable data infrastructure with a remote-first, Canada-wide approach.

Qualifications

• 4+ years of backend design, development and deployment at scale.
• Experience building highly available distributed systems (AWS, MySQL, Kubernetes).
• Hands-on experience with marketing data and measurement systems (GTM/GA4).
• Experience creating production data pipelines (Snowflake, dbt, Airflow).
• Ability to define technical plans for significant features with clean design.
• Strong ownership and proactive growth mindset.
• Excellent verbal and written communication for global teams.

Responsibilities

• Own and deliver quarterly goals for the team and lead engineers through ambiguity.
• Collaborate with product, design and analytics across the full lifecycle.
• Identify and solve project, process, technology, or business issues.
• Support operations and on-call efforts; monitor metrics and reliability.
• Set and promote code review and design standards across the team.
• Mentor teammates and lead by example.

Skills

Python

Kotlin

Distributed systems

Code ownership

Communication

Tools

AWS

MySQL

Kubernetes

Google Tag Manager

GA4

dbt

Airflow

Snowflake

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.

Marketing & Privacy Engineering (MPE) builds trusted, privacy-aware consumer web experiences and measurement systems that enable sustainable growth. Within MPE, the Marketing pillar owns affirm’s Logged-Out Web experiences, web experimentation, client-side tagging, marketing technology integrations, attribution, and measurement. As a Senior Software Engineer, you will build the data and measurement foundations that connect consumer acquisition activity across paid media, SEO/AEO, and other growth channels to downstream outcomes such as signup, conversion, and GMV. You will work at the intersection of data engineering and marketing technology, building reliable pipelines, identity and event data systems, attribution and conversion measurement, and integrations across our marketing and data ecosystems. You will partner closely with Engineering, Product, Marketing, Analytics, and Data Engineering so that consent, tagging, identity, and consumer-data requirements are incorporated into measurement architecture from the start. This role is a strong fit for an engineer who enjoys ambiguous cross‑functional problems, cares deeply about data quality and operational reliability, and wants to build durable measurement capabilities that help teams understand the effectiveness of consumer growth investments.

What You’ll Do

• You will be responsible for owning and delivering quarterly goals for your team, leading engineers on your team through ambiguity to solve open‑ended problems, and ensuring that everyone is supported throughout delivery.
• You will support your peers and stakeholders in the product development lifecycle by collaborating with product management, design & analytics by participating in ideation, articulating technical constraints, and partnering on decisions that properly consider risks and trade‑offs.
• You will proactively identify project, process, technology or business issues, advocate for them, and lead in solving them.
• You will support the operations and availability of your team’s artifacts by creating and monitoring metrics, escalating when needed, and supporting “keep the lights on” & on‑call efforts.
• You will foster a culture of quality and ownership on your team by setting or improving code review and design standards for your team, and advocating for them beyond your team through your writing and tech talks.
• You will help develop talent on your team by providing feedback and guidance, and leading by example.

What We Look For

• You have 4+ years of experience designing, developing and launching backend systems at scale using languages like Python or Kotlin.
• You have a track record of developing highly available distributed systems using technologies like AWS, MySQL and Kubernetes.
• You have hands‑on experience building marketing data and measurement systems using technologies such as Google Tag Manager (GTM/sGTM), GA4, advertising and conversion APIs, customer data platforms (CDPs), attribution or mobile measurement platforms, and consent management platforms.
• You have experience building production data pipelines and analytical models using technologies such as Snowflake, dbt, and Airflow, including event‑level data, identity resolution, attribution, or conversion measurement.
• You have experience defining a technical plan for the delivery of a significant feature or system component with an elegant, simple and extensible design. You write high quality code that is easily understood and used by others.
• You are proficient at making significant changes in a large code base, and have developed a suite of tools and practices that enable you and your team to do so safely.
• 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.

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.

Pay Grade - N

Affirm 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 equity rewards, monthly stipends for health, wellness and tech spending, and benefits (including 100% subsidized medical coverage, dental and vision for you and your dependents.)

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

Equity Grade - 6

Employees new to affirm typically come in at the start of the pay range.

Remote‑first with flexibility built in

Affirm 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 affirm 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 affirm 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: affirm considers qualified applicants with arrest and conviction records, as required by law.