Backend Engineer – Mid-Senior, Go

🕒 July 28

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nexos.ai

WebsiteLinkedInAll Job Openings

51 - 200 employees

Founded 2024

🤖 Artificial Intelligence

☁️ SaaS

🤝 B2B

🔥 Funding within the last year

💰 $35.2M Series A on 2025-10

Artificial Intelligence • SaaS • B2B

nexos. ai is an all-in-one, model-agnostic AI platform and SaaS that centralizes access to 200+ large language and other AI models. It offers two main products: an AI Gateway (a single OpenAI-compatible API endpoint for developers to route, manage, and observe multiple models with smart routing, cost controls, and API key governance) and an AI Workspace (a business-facing interface with chat across models, no-code Agent builder, integrations to tools like Google Drive and Slack, team collaboration, and governance). The platform emphasizes secure, compliant deployments (EU hosting, SOC 2 Type 2, ISO 27001, GDPR), cost control, and enterprise-grade observability and access management, targeting business teams and engineering organizations to scale AI adoption across functions like marketing, sales, recruitment, and customer service.

📋 Description

• Build and improve features that help our AI orchestrator deliver personalized experience. • Write clean, reliable code with performance, scalability, and security in mind. • Work closely with other developers to design, build, and maintain our Go-based microservices. • Take end-to-end ownership of our services: from implementing them to deploying, monitoring, and improving them over time. • Work in a fast-paced, constantly evolving environment and enjoy adapting, learning, and shipping solutions at high speed.

🎯 Requirements

• Experience to create scalable, stable, and secure code with Golang. • Experience working with distributed technologies and NoSQL databases, with a strong background in high-load applications and microservices architecture. • System design is nothing new to you - you're familiar with Domain-Driven Design principles and know what patterns to use when and why. • Passionate about secure, compliant backend architecture and technologies. • Comfortable balancing speed and quality in a startup environment. • A collaborative mindset where you love to discuss, rethink, and redesign your ideas that create shared success within your team and the company.

🏖️ Benefits

• Professional growth. Internal and external events, online training, conferences, books - everything you need to reach your full potential. • Health benefits. Private health insurance, online & on-site workouts (LT) / online workouts & sports access card (PL), consultations - to feel and be your best. • Team spirit. Team buildings and parties with games, shows, tastings, food coupons, gifts - and it's on us. • More free time. Stay with us and additional vacation days will be added to your calendar. • Additional paid leave. Additional days are covered by us in cases of illness or special occasions. • Flexibility. Flexible working time arrangement.