--- title: 'Senior Full-Stack Software Engineer (Python / AI) at 3Pillar' canonical: 'https://feeny.ai/job/senior-full-stack-software-engineer-python-ai-3pillar-moldova-zyfbpsvb3n2k' type: 'job' last_seen: '2026-09-08' --- # Senior Full-Stack Software Engineer (Python / AI) at 3Pillar - **Company:** 3Pillar - **Location:** Moldova - **Employment:** full-time - **Work type:** remote - **Posted:** 2026-08-28 - **Last confirmed live:** 2026-09-08 - **Apply:** https://jobs.lever.co/3pillarglobal/b6f8f6ea-6fcf-442c-86d7-811d879446e6 ## Job description 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. 👋 Greetings, future tech savant: Embark on an exciting journey into the realm of software development with 3Pillar! We are looking for an experienced Senior Full-Stack Engineer to drive the modernization of our core platform. We need a pragmatic, senior-level engineer, comfortable across a Python backend and a React frontend on AWS, 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 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. - Build and maintain responsive, well-tested frontend features in React alongside backend services. - Work within an AI-driven development workflow, applying spec-driven development practices (writing clear specs/prompts that steer AI-assisted implementation) and using GitHub Copilot as a core part of the daily engineering workflow. - 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 senior-level professional experience in software engineering, with strong depth in 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). - Hands-on experience building production frontend applications in React, alongside backend services at scale. - 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. - Proficiency with relational databases. - Experience deploying and operating systems on AWS. - Working knowledge of GitHub Copilot (or similar AI coding assistant) and spec-driven development practices in an AI-assisted engineering workflow. - Familiarity with Agile software development methodologies. - 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) - Familiarity with other AI coding agents (Claude Code, Cursor, etc.) beyond Copilot. - Proficiency in Object-Oriented Programming (inheritance, polymorphism, classes, instances, properties). What is it like working for 3Pillar Global? At 3Pillar, we offer a world of opportunity: Imagine a flexible work environment – whether it's the office, your home, or a blend of both. From interviews to onboarding, we embody a remote-first approach. You will be part of a global team, learning from top talent around the world and across cultures, speaking English everyday. Our global workforce enables our team to leverage global resources to accomplish our work in efficient and effective teams. We’re big on your well-being – as a company, we spend a whole trimester in our annual cycle focused on wellbeing. Whether it is taking advantage of fitness offerings, mental health plans (country-dependent), or simply leveraging generous time off, we want all of our team members operating at their best. Our professional services model enables us to accelerate career growth and development opportunities - across projects, offerings, and industries. We are an equal opportunity employer. It goes without saying that we live by values like Intrinsic Dignity and Open Collaboration to create cutting-edge technology AND reinforce our commitment to diversity - globally and locally. Join us and be a part of a global tech community! 🌍💼  Check out our Linkedin site and Careers page to learn more about what it’s like to be part of our #oneteam! ## About 3Pillar ## Company Overview - **One-liner**: 3Pillar is a leading AI transformation partner that helps enterprises build AI-native products, modernize core systems, and orchestrate intelligent workflows through a combination of proprietary platforms and engineering services. - **Entity Type**: Private (funded; $25.9M total funding across 5 rounds) - **Headquarters**: Fairfax, Virginia, United States - **Founded**: 2006 - **Founders**: Not publicly disclosed ## Core Business - **Primary industries**: Software engineering, AI/ML, digital product development, data engineering, cloud infrastructure - **Target customers**: B2B, Enterprise (mid-market to large global brands) - **Mission/purpose**: “We harness the extraordinary power that’s sparked when people from all walks of life, all around the world, collaborate together. Our high-performing teams work with you to create innovative solutions that solve strategic business challenges and deliver outsized impact.” ## Products & Services - **[HelixAI](https://www.3pillar.ai/)**: An open, composable, AI-native development and runtime platform for building agentic AI workflows. Includes an ontology-driven knowledge graph (ATLAS) and governance tools. - **[AIRE](https://www.3pillar.ai/)**: An agentic AI harness with built-in governance, SDLC agents, and token-optimized execution with human oversight. - **[NEXUS](https://www.3pillar.ai/services/)**: Rapid AI-native application and agent development platform for streamlining operations and enabling reasoning-driven decisions. - **AI-Led Product & Platform Modernization**: Services to evolve legacy systems deliberately, balancing stability and speed (powered by ATLAS). - **Digital Products & Experiences**: AI-powered product design and development, bringing ideas to market faster. - **AI-Ready Data**: Data foundation services to transform fragmented data into governed, high-quality assets. - **AI-Powered Operations**: Reimagining enterprise operations using AI agents and automation. ## Market Standing - **Valuation/Market Cap**: Not disclosed (private company) - **Key Metric**: Annual Revenue of $53.7M (as per LinkedIn); Total Funding of $25.9M (5 rounds) - **Notable Investors/Partners**: Not explicitly named in available sources; operates in 5+ countries (Romania, Guatemala, Costa Rica, Mexico, India, United States) - **Growth Signals**: 1,245 employees (though -4.6% YoY); global presence across 19 countries; strong emphasis on agentic AI and AI transformation as core growth drivers ## Competitive Advantages - **Proprietary AI platforms**: HelixAI, AIRE, ATLAS, and NEXUS provide a differentiated, composable approach to enterprise AI adoption. - **Product Mindset®**: A unique methodology that blends product engineering with cognitive computing, enabling faster, more resilient digital transformation. - **Global distributed team**: Ability to leverage talent across time zones and cultures while maintaining English as the working language. - **Deep expertise across the full stack**: From data engineering and cloud to UX and AI governance, all under one roof. ## Strategic Focus - **Agentic enterprise**: Scaling AI through agentic workflows and intelligent automation. - **Open, composable architecture**: Building platforms that integrate with clients’ existing tools and systems. - **AI governance and quality**: Emphasizing governed, trustworthy AI with human oversight at every step. - **Continued global expansion**: Leveraging a distributed workforce model to serve clients worldwide. ## Why Work Here - **Flexible work environment**: “We work from anywhere” – headquarters in Washington, DC metro area, with offices in North America, Europe, Asia, and Latin America. Team members can choose office, home, or a blend. - **Well-being focus**: A full trimester in the annual cycle dedicated to well-being, including fitness offerings, mental health plans (country-dependent), and generous time off. - **Global collaboration**: Work with top talent from around the world, daily English communication, and potential travel to colleagues in different regions. - **Career growth**: Practice-aligned teams (Automation, Data Science & Analytics, Engineering & Architecture, Lifecycle Management, UX) allow targeted skill development across projects and industries. - **Professional services model**: Accelerated career growth through exposure to diverse clients and technologies. - **Open positions** include Senior Data Engineer, Technical Lead, AI ML Architect, DevOps Engineer, Senior Software Engineer, and more. ## Sources 1. [3pillar.ai](https://www.3pillar.ai/) 2. [3pillar.ai/careers/](https://www.3pillar.ai/careers/) 3. [3pillar.ai/services/](https://www.3pillar.ai/services/) 4. [linkedin.com/company/3pillar](https://linkedin.com/company/3pillar) 5. 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