Senior Python Software Engineer

Role Description

Embark on an exciting journey into the realm of software development with 3Pillar! We are looking for an experienced Python Engineer to drive the modernization of our core platform. We need a pragmatic, senior-level engineer who can tackle complex technical debt, own architectural decisions, and help us scale our cloud-based system. If you are passionate about building scalable, maintainable distributed systems and want to make a tangible impact on a product used by a global customer base, this is the role for you.

Key Responsibilities

• Craft client code that is efficient, performant, testable, scalable, secure, and of the highest quality.
• Ensure code is secure through Software Composition Analysis (SCA), and drive remediation through triaging, prioritization, remediation, and verification.
• Provide accurate status tracking, reporting, and estimation using project methods and tools.
• Gather requirements, validate their understanding amongst the team, and create and maintain relevant documentation.
• Design and implement scalable AI and agentic workflows using LLMs, focusing on reliability and observability.
• Execute activities within the current methodology and uphold the highest quality standards.
• Partner directly with Product and Engineering leadership to translate complex business requirements into scalable technical solutions.
• Identify and remediate technical debt to improve system stability, performance, and developer velocity.
• Take ownership of projects, from technical design to a successful launch.
• Participate in code reviews to maintain code quality and consistency.

Qualifications

• Extensive professional experience in software engineering with a primary focus on Python and distributed systems.
• Proven ability to own technical features from design through to production deployment with minimal supervision.
• Deep understanding of system design, architecture, and the ability to solve ambiguous technical challenges.
• Expertise with Git source control tools (Github, Gitlab or others).
• Expertise with Python package management (UV, Conda or others).
• Experience with unit testing (Pytest).
• Experience with managing Docker containers, and orchestration with Kubernetes and AKS.
• Intermediate level design proficiency following UML / C4 / ArchiMate.
• Experience in engineering software systems of medium-to-large scope and complexity.
• Familiarity with Agile software development methodologies.
• Proficiency with relational databases.
• Experience in building frontend/backend applications at scale.
• Proficiency in the English language.

Additional Experience Desired

• Knowledge of Python web frameworks (Flask or others).
• Knowledge of Snowflake.
• Experience with Agentic frameworks (e.g., MCP, A2A).
• Knowledge of workflow orchestration platforms (Apache Airflow, Automic Automation or others).
• Knowledge of protocols like and serialization formats like JSON and XML.
• Knowledge of SCA platforms (Github Advanced Security, Snyk, Checkmarx or others).
• Understanding of AI coding agents (Claude Code, Copilot, Cursor or others).
• Understanding of Software Development Life Cycle (SDLC).
• Proficiency in Object-Oriented Programming (inheritance, polymorphism, classes, instances, properties).

Benefits

• Medical Insurance benefits as per company policy.
• Life Insurance as per company policy.
• 12 days of paid vacation, sick leave, and paid holidays as per local law.
• Paternity and maternity leave as per local law.
• Marriage, bereavement, and graduation leaves as per company policy.
• Paid holidays as per local law.
• Christmas bonus as per local law.
• Saving Fund “Asociacion Solidarista”.
• Beach house (Managed by the Asociacion Solidarista).
• Direct deposit of payroll.