#652 Sr. Backend Engineers (Card Platform)

BlueCloud Services, Inc.; United States; Remote; USD 150,000 - 190,000; Full time

Job summary

BlueCloud Services, Inc. is seeking a senior backend engineer in the United States to develop and maintain services in Python or Kotlin. You will design data models, build scalable APIs, and collaborate with Product, Analytics and other engineering teams to advance our Card-related initiatives.

This role emphasizes reliability, performance, and cross-functional teamwork. The ideal candidate has 6+ years of backend experience, strong database and distributed systems knowledge, and excellent

Qualifications

• 6+ years of backend software engineering experience in Python or Kotlin.
• Strong knowledge of relational databases.
• Experience with distributed systems and scalable architecture.
• Excellent written and verbal communication; async collaboration.
• Cross-functional work with Product, Analytics and other teams.
• Experience with AWS or other cloud providers.

Responsibilities

• Write backend code in Kotlin or Python with quality standards for affirm Card product.
• Design system and contribute to implementation.
• Work cross functionally with Product, Analytics and other engineering teams across affirm to set and execute our Card strategy.
• Build APIs and data models for service-oriented and event-driven architectures.
• Participate in on-call processes to support team growth and reduce toil.

Skills

Python

Kotlin

Backend development

Distributed systems

Relational databases

APIs

AWS

Tools

REST APIs

Job description

BlueCloud is a Snowflake Elite Partner and the 2026 CoCo Catalyst Snowflake Partner of the Year. We help enterprise organizations move from fragmented legacy systems to unified, AI-ready Snowflake platforms — delivering data migration, engineering, governance, BI & analytics, and AI/ML solutions 40–50% faster than traditional approaches.

With 450+ Snowflake consultants, 200+ enterprise transformations under our belt, and a 100% Snowflake focus, we combine advisory-led thinking with AI-powered accelerators to turn months of work into weeks of results. Our clients span Financial Services, Healthcare & Life Sciences, Retail, Manufacturing, Energy, and more — and the outcomes speak for themselves: 97% faster reports, 40% fraud reduction, $1.5M in client savings, and 10× client growth.

We don’t just strategize — we execute.

What you’ll do

• Write lots of code for backend (either Kotlin or Python) with high degree of
  standards for quality for affirm Card product.
• Design system and contribution in implementation.
• Work cross functionally with colleagues in Product, Analytics and other
  engineering teams across affirm to set and execute our strategy for the affirm
  Card.
• Build APIs and data models to work within service oriented and event-driven
  architectures.
• Participate in the various engineering on-call processes that support team growth
  and efficiency by reducing toil.

What we look for

• 6+ years of experience as a backend sr. software engineer in either Python or
  Kotlin language.
• Strong understanding of any relational database system best practices.
• Strong understanding of distributed systems and how architectural decisions
  affect performance and maintainability.
• Excellent communication skills, both written and verbal. Must be proficient in
  asynchronous mode of communication–written tech specs, wiki, project plans, etc.
• project management skills–high degree of organization and ability to surface
  critical information effectively.
• Work with our Product team to extend our core decisioning service; building new
  risk and fraud mitigation features.
• Passion for working with multi-functional teams including Product, Design,
  Analytics and Business teams.
• Experience with AWS and/or other cloud providers is a plus.
• Prior experience with Card related systems is a plus (Marqeta, Stripe, FIS, Card
  processing, Transaction processing, money movement, ACH etc).

We are looking for someone who is experienced in building lasting relationships and is passionate about making meaningful contributions to our team. Don’t be mistaken, this is a challenging career path but also highly rewarding.