About the Company

Qolo helps businesses manage complex payments and financial transactions with greater efficiency, security, and control. Its platform supports a range of financial services, including banking, wage access, distribution payments, card processing, and fintech applications. By combining a real-time ledger, virtual accounts, and multiple payment methods through a single API, Qolo enables financial institutions to launch and scale products without replacing their existing core systems or relying on multiple vendors.

About the Role

Qolo is seeking a Principal Full Stack Engineer to lead the design and development of secure, scalable distributed systems that support high-volume financial transactions. Reporting to the VP of Engineering, you will work across the full technology stack, influencing architecture while remaining directly involved in production code and technical execution.

This is a hands-on engineering leadership role for someone with deep experience in distributed systems, payments infrastructure, and cloud-native development. You will help strengthen the platform's reliability, security, and performance while improving engineering practices and development efficiency as the business grows.

Key Responsibilities

• Lead the design, development, and evolution of scalable, secure, high-performance distributed systems for payments and card processing.
• Influence architectural decisions across frontend, backend, data, and cloud infrastructure.
• Write production-grade code using Angular, C#/.NET Core, and SQL Server while setting high standards for code quality.
• Design and optimize RESTful APIs, microservices, and event-driven systems.
• Architect, deploy, and operate cloud-native applications and services on Microsoft Azure.
• Champion CI/CD, DevOps practices, and automation to improve delivery speed, reliability, and software quality.
• Use AI-enabled development tools to improve engineering productivity and software development lifecycle (SDLC) effectiveness.
• Ensure systems meet fintech requirements for security, compliance, availability, and auditability.
• Take ownership of high-impact engineering initiatives and drive them through implementation and delivery.
• Guide technical decisions that balance immediate delivery needs with long-term scalability and maintainability.
• Help establish engineering standards, strengthen technical direction, and improve how the team builds and operates software.
• Collaborate with engineering leadership and business stakeholders to align technical strategy with business objectives.

Required Qualifications

• Demonstrated experience working as a Principal Engineer or in an equivalent architect-level role.
• Deep expertise in distributed systems architecture and large-scale transaction platforms.
• Strong hands-on experience with modern Angular, C#/.NET Core, and SQL Server.
• Experience building and operating cloud-native solutions using Microsoft Azure.
• Strong knowledge of event-driven architecture, messaging systems, RESTful APIs, and microservices.
• Experience with CI/CD pipelines, DevOps practices, and automation.
• Knowledge of secure coding practices in regulated environments.
• Ability to lead through hands-on development, sound architectural decisions, and technical execution.
• Strong ownership, accountability, communication, and problem-solving skills.
• Ability to work through ambiguity, adapt to changing priorities, and make pragmatic technical decisions.

Preferred Experience

• Experience in fintech, payments, card issuing, or related financial infrastructure.
• Experience scaling systems in both startup and enterprise environments.
• Experience building platforms that support high-volume financial transactions and demanding reliability requirements.

Location & Work Arrangement

• Work arrangement: Remote
• Location preference: Candidates based in South Florida are preferred.
• Department: Engineering
• Reports to: VP of Engineering

Why Join Qolo?

Help shape the architecture of a growing fintech platform.

Solve complex distributed systems challenges across payments and financial infrastructure.

Take ownership of significant technical initiatives and influence engineering decisions.

Build enterprise-grade infrastructure in a company that aims to avoid unnecessary bureaucracy.

Help define engineering culture, technical standards, and the platform's long-term direction.