Senior Python Backend Developer

Senior Python Backend Developer

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.

Role Overview

Elevate your expertise to new heights at 3Pillar, the premier destination for trailblazing senior engineers like yourself. Picture collaborating with industry leaders and spearheading transformative projects that directly impact global clinical trial outcomes. Our mission is to revolutionize healthcare technology, and your skills are integral to achieving this ambitious goal. Your role extends beyond writing code; you will architect scalable backend services for the BX platform and guide a team of engineers in delivering cloud-native, Python-based systems built for the demands of clinical research.

Key Responsibilities

• Facilitate effective communication with client project stakeholders regarding project status and technical recommendations.
• Lead the design and development of backend services and APIs using Python and the Pyramid framework on AWS.
• Architect and manage PostgreSQL schemas, queries, and performance optimizations for clinical-grade data.
• Build and maintain AWS infrastructure including Kubernetes (EKS), Lambda, API Gateway, and cloud-to-cloud integration patterns.
• Define backend coding standards, API design patterns, security best practices, and testing strategies.
• Mentor and guide backend engineers, driving engineering excellence across the team.
• Engage in agile software development including stand-ups, sprint planning, retrospectives, and estimation.
• Independently drive project delivery within defined architecture, demonstrating autonomy from conceptualization to deployment.

Minimum Qualifications

• Design and implement scalable backend services and APIs using Python
• Architect PostgreSQL databases with strong skills in schema design, query optimization, and data integrity
• Utilize AWS services: Kubernetes (EKS), Lambda, API Gateway, RDS, S3, IAM, and cloud-to-cloud integrations
• Mentor engineers, conduct code reviews, and enforce engineering standards across the team
• Deliver production systems with high reliability, observability, and security

Must-Have Skills & Tools

• Languages: Python, JavaScript, SQL, REST API
• OAUTH 2
• Docker
• Database: PostgreSQL (advanced — schema design, performance tuning, stored procedures)
• Cloud: AWS – Kubernetes (EKS), Lambda
• Tools: Jira, Bitbucket/GitHub, Slack/Teams

Good to Have Skills

• Framework: Pyramid (Python web framework)
• VsCode
• TypeScript
• Snowflake
• SQL Alchemy (ORM)

Experience & Qualifications

• 6+ years of backend engineering experience, including 2+ years in a lead or tech lead role.
• Strong understanding of SOLID principles, OOP, and clean architecture patterns.
• Familiarity with OWASP security practices.
• English proficiency.

Additional Experience Desired

• Experience with clinical or healthcare data systems (HL7, FHIR, GxP, 21 CFR Part 11).
• Knowledge of microservices and serverless architectures.