Senior Python Software Engineer - AI

3Pillar is an AI transformation partner on a mission to help enterprises build the AI-native products and intelligent agents that will define the next era of business. With teams across North America, Europe, Latin America, and Asia, we work with the most ambitious companies in financial services, healthcare, media, and technology — helping them move faster, modernize boldly, and compete on their own terms. Our HelixAI platform and Helix Pods delivery model put our engineers at the center of real agentic transformation — doing work that is open, portable, and built to last. We are building the future of enterprise AI.

Key Responsibilities

Craft client code that is not just efficient but also 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.

Participating in code reviews to maintain code quality and consistency.

Minimum 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).

• Design and implement scalable AI and agentic workflows using LLMs, focusing on reliability and observability.

• 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 HTTP, 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

Vacations. According to the law from your first anniversary.
Discretionary Time Off (employees are able to take time off when necessary)*
26 days of Christmas bonus
Food coupons
Major medical insurance
Life Insurance (optional)
Savings box (optional)
Law benefits: IMSS, Afore, Infonavit.
Career plan that will let you grow and plan for the future
Home Office
Internal Trainings
Support with external trainings and certifications
Referrals bonus

What is it like working for 3Pillar Global?

At 3Pillar, we create an environment where people can do their best work while maintaining a healthy work-life balance.

• Flexibility & Well-being – Our remote-first approach gives you the flexibility to work where you perform best, while prioritizing your well-being and personal commitments.
• Global Community – Collaborate with talented colleagues across the globe in a culture built on connection, support, and shared success.
• Your Voice Matters – We foster open communication and multiple feedback channels, ensuring every employee has the opportunity to be heard and make an impact.
• Growth & Development – Gain exposure to diverse clients, industries, and challenges that accelerate learning and career growth.

Our culture is guided by four core values: Collaboration, Outperform, Respect, and Evolve—the principles that shape how we work, grow, and succeed together.