Principal Software Engineer (React, NestJS, AWS, LLM)

About the Project:

Our mission is to build the world’s first human-like Agentic AI, or autonomous relationships, that combine friendship, deep gaming knowledge, and 24/7 availability, giving every High Value Player a trusted partner to play, share, engage with, and grow.

A proactive, emotionally aware AI concierge for every VIP.

• Real-time engagement that drives retention and LTV.
• Handles offers, rewards, and social dynamics intelligently.
• Built for tone, timing, and context. Feels human, acts instantly.
• Delivers measurable impact on both revenue and operations.

Responsibilities:

• End-to-End Feature Ownership
  • Take full responsibility for delivering product features from idea to production (design, software development, implementation, testing, deployment, monitoring).
  • Collaborate with product/design to define scope, API contracts, and UX flows.
• System & Architecture Design
  • Create high-level design documents (HLDs) for complex features, integrations, and system flows.
  • Advocate for scalable, maintainable architecture choices from day one.
  • Participate in and lead technical discussions, design reviews, and architecture sessions.
• Frontend Engineering (React)
  • Build responsive, modern UI with React and TypeScript.
  • Implement component architecture, state management, hooks, and performance optimizations.
  • Integrate frontend with backend APIs following clean contract definitions.
• Backend Engineering (NestJS)
  • Develop REST APIs, micro-modules, authentication flows, and business logic using NestJS.
  • Design and document API schemas, DTOs, validation, and error handling.
  • Implement integrations with 3rd-party services when needed.
• Database & Data Modeling (PostgreSQL)
  • Design normalized data models and schemas that support MVP and future scalability.
  • Write efficient SQL queries, migrations, and data-access layers.
  • Ensure integrity, indexing strategy, and performance best practices.
• AWS Cloud & DevOps
  • Deploy and maintain services on AWS (ECS, Lambda, SQS, CloudWatch, RDS, S3).
  • Set up CI/CD pipelines using GitHub Actions.
  • Build observable systems with logs, metrics, and monitoring.
  • Maintain production-grade cloud architecture with best practices around security, networking, performance, and cost.
• Code Quality, Testing & Documentation
  • Write clean, maintainable, well-tested code (unit + integration).
  • Create technical documentation, diagrams, and design notes.
  • Review PRs and help cultivate excellent engineering standards.
• Communication & Collaboration
  • Communicate clearly, proactively, and transparently.
  • Discuss design tradeoffs, raise risks early, and push for clarity.
  • Give and receive feedback with professionalism and openness.
  • Work closely with founders to shape the product roadmap.
  • Move fast without compromising essential quality.
  • Be flexible in scope and willing to jump into any part of the stack.

Industry:

Support Services for Gaming

At DEVLEGION We Offer:

• A competitive salary
• A flexible and hybrid work environment
• A supportive and collaborative work culture
• A chance to work on exciting and challenging projects with diverse clients
• An opportunity to grow and advance your career with continuous learning and development

If you are interested in joining our team, please apply now by sending your resume and cover letter.

• 7+ years of experience as a full-stack engineer.
• Strong proficiency in React, TypeScript, and modern frontend tooling.
• Strong experience with NestJS and backend design.
• Solid understanding of PostgreSQL, data modeling, and SQL performance.
• Microservices or event-driven architecture knowledge.
• Hands-on experience deploying cloud apps on AWS.
• Strong Git, GitHub, and GitHub Actions experience.
• Excellent communication.
• Strong collaboration mindset.
• Open to feedback and design discussions.
• Ability to simplify complexity.
• Proactive, independent, and ownership-driven.
• Product mindset with attention to detail.
• (Nice-to-have) Infrastructure-as-a-code experience.
• (Nice-to-have) Observability tooling familiarity.