Sr. Backend Engineer (Golang + MongoDB)

The Mission

We are looking for a heavy-hitting Senior Backend Engineer who thrives at the absolute intersection of distributed systems architecture, high-performance data pipelines, and cutting-edge AI engineering.

This is not a role for someone who simply writes code against a checklist. We are scaling a high-throughput, event-driven ecosystem built primarily on Golang, Node.js, and Kafka, and we need a systems specialist to build scalable services, optimize core data layers, and bring advanced automation features to life. Our systems are robust, scalable, and clean - your job will be to champion further technical improvements, elevate product capabilities, and push our backend limits to support a massive global user base.

If you have a true builder's grit, an obsession with clean code architecture, and love working with modern data frameworks and AI patterns, this role was built for you.

Key Responsibilities

High-Throughput Backend Architecture: Design, optimize, and maintain mission-critical backend microservices utilizing Golang as the primary language, supplemented by Node.js (TypeScript).

Event-Driven Systems: Evolve our highly event-driven architecture using Kafka to seamlessly handle massive asynchronous workflows and high-volume data streams.

Database Optimization: Manage, scale, and optimize core product data storage layers, focusing heavily on MongoDB and Redis for sub-millisecond data reads and high availability.

Agentic AI & Meta-Prompting: Architect and implement complex AI-powered systems, autonomous agentic workflows, and meta-prompting frameworks that drive core product automation.

API Systems Design: Design, secure, and document robust, clean GraphQL and RESTful APIs capable of serving a global, highly active user base.

Complex Problem Solving: Apply deep logical thinking to solve sophisticated algorithmic, product, or quantitative challenges natively within backend business logic.

Requirements

Dual-Language Polyglot: 5+ years of deep backend experience with elite proficiency in Golang and strong core capabilities in JavaScript/TypeScript (Node.js).

Distributed Systems Mastery: Proven experience architecting asynchronous, event-driven microservices using Kafka or equivalent high-scale message brokers.

NoSQL Database Expertise: Advanced understanding of data modeling, scaling, document schemas, and indexing strategies specifically within MongoDB and Redis.

Architectural Mentality: A history of building stable, production-grade applications with clean coding practices and modular component designs.

Preferred Qualifications (Nice to Have)

Advanced Mathematics: A strong mathematical background or aptitude for solving complex calculation problems related to gaming ecosystems, mechanics, or financial data layers.

Experience working in high-growth startup environments within gaming, Web3, fintech, or high-volume consumer tech.

AI & Agentic Framework Fluency: Real-world experience working with LLMs, programming autonomous agentic workflows, and managing advanced meta-prompting strategies.

Familiarity with containerization (Docker/Kubernetes) and cloud environments from a developer's standpoint.

Alignment with EST/Eastern Europe business hours for high-bandwidth engineering communication.

Benefits

Why Join Us?

We offer more than just a standard software engineering seat; we offer the runway to drive the technical destiny of a global powerhouse.

Extreme Architectural Sovereignty: We value raw execution, system health, and clean code over bureaucratic red tape. If your design framework is robust and ready, you deploy it.

A Culture of High-Talent Momentum: Work alongside a highly competent, autonomous team that moves at lightspeed, actively supports your professional growth, and celebrates breakthroughs.

High-Growth Upside: We value "potential over pedigree." For a Senior Software Engineer who takes relentless ownership of end-to-end problems and systematically scales our platform's capacity, there is a clear, unrestricted runway into senior architecture and engineering leadership.