Lead Full-Stack / Unity Architect (Future Team Lead - US)

We’re looking for a senior, hands-on engineer who can build independently today and lead a team tomorrow.

This role starts as a solo, high-ownership position, where you will take full responsibility for critical parts of our system. Within 6-12 months, you are expected to hire, lead, and scale a team of 4-10 engineers.

You’ll work closely with leadership in Israel while operating autonomously in the US.

About the Product

Althimis is building a real-time, large-scale training 3D platform and simulation combining:

• MMO-scale collaboration
• Physical simulations
• AI-driven systems
• Browser-based (WebGL) real-time environments

Our focus is on performance, scalability, and real-world simulation accuracy, targeting enterprise, defense, and advanced training use cases.

What You’ll Do

Phase 1 - Hands-On (Initial Months)

• Own and develop core systems end-to-end (Unity + backend)
• Build real-time, scalable systems supporting thousands of users
• Work across:
• Unity (client, simulation, rendering)
• Backend services (APIs, real-time communication, infra)
• Solve performance, networking, and system design challenges

Phase 2 - Leadership (Within 12 Months)

• Build and lead a team of 4-10 engineers
• Define architecture, standards, and processes
• Own planning, delivery, and technical direction
• Mentor engineers while staying technically involved

Core Requirements

• 10+ years of software engineering experience
• Strong C# expertise
• Deep experience with Unity (real-time / multiplayer / simulation)
• Proven experience building production backend systems
• Strong system design and architecture skills
• Experience working across frontend + backend systems

Leadership Experience

• Prior experience leading teams (at least 4 engineers)
• Still hands-on recently (not purely managerial)
• Experience owning projects end-to-end
• Ability to scale into a team of 4-10 within a year

Technical Strength

• Experience with:
• Real-time systems (WebSockets, WebRTC, multiplayer frameworks)
• Scalable backend architecture (APIs, async systems, caching)
• Observability (logs, metrics, tracing)
• Strong understanding of:
• Clean architecture (DI, modular systems)
• Performance optimization (CPU, GPU, memory, bandwidth)

Math & Simulation

• Strong mathematical thinking
• Experience or familiarity with:
• Physical simulations
• Real-time systems requiring numerical accuracy
• Ability to reason about performance and correctness from first principles

Nice to Have

• Experience with Photon, SignalR, or similar
• Experience building physical Simulation
• Experience creating training / learning applications
• Background in AI systems or data pipelines
• Experience in defense / enterprise / regulated environments
• Knowledge in front end REACT
• Experience building MMO-scale systems, If you’re a hands-on senior engineer ready to step into leadership and build something ambitious from the ground up - we’d love to talk.

Pulled from the full job description

• 401(k)
• Dental insurance
• Flexible schedule, * 401(k)
• Dental insurance
• Flexible schedule