Senior Software Engineer & Tech Lead – Payments & Cloud

hireworks.io; Buenos Aires; Remote; ARS 181,747,000 - 272,620,000; Full time

Benefits offered by this job

Competitive Pay

Remote Flexibility

Paid Time Off

Public Holidays Paid

Job summary

hireworks.io is seeking a highly experienced Senior Software Engineer / Technical Lead to modernize and scale its client's payment processing systems. This role blends hands-on backend development with cloud architecture and technical leadership.

The ideal candidate will drive architectural decisions, ensure PCI compliance, and guide engineering teams while delivering scalable, secure, and reliable payment solutions across AWS and Azure environments.

Qualifications

• 10+ years of software engineering experience including hands-on backend development.
• Strong experience with .NET, Java, or Python, ideally .NET.
• Strong understanding of backend architecture, distributed systems, and database design.
• Experience with SQL Server and relational database optimization.
• Solid cloud experience with AWS and/or Azure, including containerized or serverless environments.
• Hands-on PCI-DSS compliance experience within payment or transaction-processing systems.
• Experience with payment integrations, financial reconciliation, or transaction processing.
• Experience leading engineers, mentoring team members, or making independent technical decisions.

Responsibilities

• Design and improve payment processing systems, including transaction tracking, reconciliation, fraud detection, and chargeback management.
• Modernize legacy applications and improve scalability, reliability, and security.
• Lead technical decisions around backend architecture, system design, and event-driven services.
• Work with payment processor integrations and resolve reconciliation gaps across multiple systems.
• Support AWS-based events infrastructure and Azure-based payment processing services.
• Guide engineering teams, improve development processes, and support production deployments.
• Establish best practices for automated testing, observability, and CI/CD.
• Leverage AI-assisted development tools such as Claude Code or Codex.

Skills

Backend development

Distributed systems

Cloud architecture

PCI-DSS compliance

Technical leadership

AI-assisted coding

Tools

SQL Server

Datadog

New Relic

Claude Code

Codex

Job description

hireworks.io is seeking a highly experienced Senior Software Engineer / Technical Lead to modernize and scale its client's payment processing systems. This role blends hands-on backend development with cloud architecture and technical leadership.

The ideal candidate will drive architectural decisions, ensure PCI compliance, and guide engineering teams while delivering scalable, secure, and reliable payment solutions across AWS and Azure environments.