Sr. Backend Engineers (Card Platform)

BlueCloud Services, Inc.; United States; Remote; USD 140,000 - 190,000; Full time

Job summary

BlueCloud Services, Inc. is seeking a senior backend engineer to help build the backend for a consumer card product in a fast-moving payments environment.

You will write production-grade Kotlin or Python, shape system design, and partner with Product, Analytics, and other engineering teams to execute the platform roadmap. You will contribute to APIs and data models, extend decisioning services with risk and fraud-mitigation capabilities, and participate in on-call rotations to improve

Qualifications

• 6+ years as a senior backend engineer with Python or Kotlin.
• Strong experience with relational databases, schema design, and query tuning.
• Solid understanding of distributed systems and scalability considerations.
• Excellent written and verbal communication, including async documentation and specs.
• Ability to surface critical information clearly and manage projects.

Responsibilities

• Write production backend code in Kotlin or Python with emphasis on quality 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.

Skills

Kotlin/Python backend

Relational databases

Distributed systems

Technical communication

Cross-functional collaboration

Job description

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