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TrueML

Senior Software Engineer – Performance

TrueML

. Design, build, and maintain internal tools and services, primarily within legacy systems .

Posted 10/9/2026full-timeRemote • Mexico, Costa Rica, Dominican Republic, ArgentinaSenior💰 $50,000 - $78,000 per yearWebsite

Core Competencies

Role fit
Core Competencies

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Demonstrates expertise in software engineering with a focus on building and maintaining legacy systems, delivering high-revenue projects, and improving code maintainability and performance. Proficient in software architecture and capable of mentoring team members while effectively communicating with stakeholders.

Highest-signal resume keywords
Software Engineering ExperienceSoftware ArchitectureScala ProgrammingPython ProgrammingCloud Infrastructure (AWS/GCP)

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
Software EngineeringLegacy Codebase ImprovementAPI DevelopmentSystem DesignTechnical DocumentationCode ReviewTestingObservabilityProgramming FundamentalsService Ownership
Soft Skills
Strong Communication SkillsMentoring
Tools & Technologies
Cloud Infrastructure (AWS)Cloud Infrastructure (GCP)ContainersCI/CD Pipelines
Industry Keywords
High-Visibility ProjectsLegacy System ModernizationProduction Software

Tech Stack

Tools & technologies
AWSCloudGoogle Cloud PlatformPythonScala

About the role

Key responsibilities & impact
  • Design, build, and maintain internal tools and services, primarily within legacy systems
  • Contribute to architectural decisions, including how to incrementally modernize and improve existing platforms
  • Deliver on high-revenue projects where reliability, correctness, and performance are essential
  • Collaborate with stakeholders across engineering and the business to understand needs and communicate progress
  • Improve the maintainability, testing, and observability of existing codebases
  • Write clear technical documentation and share knowledge with the team
  • Participate in code reviews, mentor less-experienced engineers, and help raise the engineering bar
  • Ship meaningful improvements to legacy platforms and take ownership of at least one service or component

Requirements

What you’ll need
  • 5+ years of professional software engineering experience building and shipping production software
  • Experience with software architecture, including designing systems and making sound technical trade-offs
  • Comfort working in and improving legacy codebases
  • Strong programming fundamentals and the ability to learn new languages and tools quickly
  • Experience with Scala and/or Python
  • Experience building services or APIs used by other engineers or internal teams
  • Strong communication skills and confidence working on high-visibility projects
  • Experience leading or contributing to legacy system modernization or migration efforts (nice to have)
  • Familiarity with cloud infrastructure (AWS/GCP), containers, and CI/CD pipelines (nice to have)

Benefits

Comp & perks
  • Unlimited PTO
  • Medical benefit contributions in congruence with local laws and type of employment agreement