Sr. Backend Engineers (Card Platform)

BlueCloud Services, Inc.; United States; Remote; USD 130,000 - 190,000; Full time

Job summary

BlueCloud Services, Inc. is seeking a senior backend engineer to join a hands-on team building the backend for a consumer card product.

You will write production-grade Kotlin or Python, shape system design, and partner with product, analytics, and other engineering groups to execute the platform roadmap. This role emphasizes implementation and cross-functional collaboration in a fast-moving payments environment, with on-call rotations and a focus on reliability, performance, and clean interfaces

Qualifications

• 6+ years of experience as a senior backend software engineer in Python or Kotlin.
• Strong grasp of relational database design and query performance.
• Solid understanding of distributed systems and their impact on scalability and maintainability.
• Excellent written and verbal communication, including async collaboration via specs and docs.

Responsibilities

• Write production backend code in Kotlin or Python with emphasis on quality and reliability.
• Contribute to system design and lead portions of implementation for new services.
• Collaborate with Product, Analytics, and engineering peers to execute the card platform strategy.
• Build APIs and data models for SOA and event-driven architectures.
• Extend core decisioning services with new risk and fraud-mitigation capabilities.
• Participate in on-call rotations to reduce toil and improve team efficiency.

Skills

Kotlin

Python

System design

Backend

Relational DB

Distributed systems

Communication

On-call

Tools

AWS

PostgreSQL

Job description

Role overview

Join a senior engineering team building the backend for a consumer card product. The role focuses on writing high-quality Kotlin or Python code, shaping system design, and partnering with product, analytics, and other engineering groups to execute the platform's roadmap. It is a hands-on individual-contributor position suited to someone who enjoys both implementation and cross-functional collaboration in a fast-moving payments environment.

Responsibilities

• Write production backend code in Kotlin or Python with a strong emphasis on quality, reliability, and maintainability
• Contribute to system design and lead portions of implementation for new services and features
• Collaborate with Product, Analytics, and engineering peers to set and execute strategy for the card platform
• Build APIs and data models that fit cleanly into service-oriented and event-driven architectures
• Extend core decisioning services with new risk and fraud-mitigation capabilities
• Participate in on-call rotations, helping reduce toil and improve overall team efficiency

Requirements

• 6+ years of experience as a senior backend software engineer working in Python or Kotlin
• Strong grasp of relational database best practices, including schema design and query performance
• Solid understanding of distributed systems and how architectural choices affect scalability, performance, and maintainability
• Excellent written and verbal communication, with comfort working asynchronously through tech specs, wikis, and project plans
• Strong organizational and project management skills, with the ability to surface critical information clearly
• Genuine interest in partnering with Product, Design, Analytics, and Business teams

Nice to have

• Experience with AWS or other major cloud providers
• Prior exposure to card, payments, or transaction-processing systems such as card issuing, transaction processing, money movement, or ACH