Senior Software Engineer (Full Stack)
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:
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Facilitate effective communication with client project stakeholders regarding project status and recommendations.
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Craft client code that is not just efficient, but also performant, testable, scalable, secure, and of the highest quality.
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Actively participate in accurate planning and estimation efforts, utilizing project methods and tools.
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Proficiently gather requirements and organize/present developed features for clients.
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Execute complex activities within the current methodology and quality standards, showcasing success across diverse engagements.
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Promote client success across the team by collaborating with engineers, designers, and managers to understand user pain points, anticipate potential problems, and iterate on solutions that drive client success.
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Engage in agile software development, including daily stand-ups, sprint planning, team retrospectives, and other governance activities.
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Actively participate in the Engineering Practice community, mentoring others through Communities of Practice (CoPs) or on project teams, and supporting the growth of technical capabilities.
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Independently drive project delivery within defined architecture, demonstrating autonomy and accountability in all stages from conceptualization to deployment.
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Core Feature Engineering: Develop critical functional logic across platform components, including global identity management, cross-system profile sync configurations, and conditional event state machines for multi-variant tournament bracket processing.
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High-Performance Client Architectures: Build out client-side data persistence layers and sync semantics for native iOS (Swift/SwiftUI) or Android (Kotlin/Compose) structures, ensuring a sub-2-second cold launch target and reliable local reads under zero-connectivity field conditions.
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Cryptographic Data Protections: Implement field-level encryption protocols using AWS KMS customer-managed keys on sensitive user attributes, specifically enclosing minor-athlete medical, dietary, and safeguarding-restricted parameters.
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Advanced Integration Adapters: Construct third-party integration adapters running at a non-accelerated baseline factor, connecting messaging transports (WhatsApp Business API fan-out), profile systems of record, and peer-to-peer payment gateway handoffs.
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Automated Verification Feeds: Write comprehensive unit, integration, and contract test fixtures to feed the automated evaluation harness, ensuring that features cleanly handle complex boundary conditions.
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Technical Mentorship & Governance: Perform exhaustive code reviews at assigned trust tiers and provide active mentorship to software engineers regarding modular decoupling, defensive coding, and domain safety.
Minimum Qualifications:
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A minimum of 5+ years of experience/expertise in the following areas specified below*:
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Expertise in NodeJs(primary) , React, React Native, mobile app experience, Docker, Postgres
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Proven experience in developing microservices and local environment setup
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Proven track record of Design, development and implementation of React UI/.Net based large volume, high availability enterprise applications
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Experience on exception handling, correct use of data structures, multi-threaded programming, memory management and application tuning
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Strong No