Senior Full Stack Engineer

Company: Sahi Stock Broking (Aaritya Technologies)

Website: Visit Website

Business Type: Startup

Company Type: Product

Business Model: B2C

Funding Stage: Series A

Industry: Fintech

Salary Range: ₹ 30-60 Lacs PA

Job Description

SAHI is a SEBI-registered fintech building a high-performance trading platform for serious traders. At the core of our product is a real-time charting and trading engine where performance, correctness, and latency are first-class features.

Job Summary

We are seeking a Sr. Flutter Engineer to work on Real-Time Cross Platform Stock Trading Systems.

Join our team and work on high-performance, cross-platform trading systems where latency, smoothness, and correctness are critical.

What You’ll Work On

Our real-time rendering engine:

• Runs consistently at 60 FPS
• Renders an infinite canvas
• Renders live candlesticks directly from streaming market data
• Handles complex user interactions (indicators, drawings, orders, positions)
• Works seamlessly across mobile, desktop (macOS & Windows), and web
  
  

• Extend and optimize a production-grade real-time rendering engine
• Design low-latency async pipelines for streaming market data
• Implement heavy on-device computations (options payoff curves, ML workflows) using isolates and concurrency
• Optimize rendering, buffering, and memory management to maintain 60 FPS under load
• Build native plugins and cross-platform abstractions across iOS, Android, macOS, Windows, and Web
• Contribute to the architecture and design system of a large-scale cross-platform application
  
  

• Minimum 6+ years of experience is required in Flutter and Dart
• 6+ years of engineering experience across at least two platforms (mobile/web/desktop)
• Strong expertise in concurrency, async programming, threading, or isolates
• Proven experience optimizing UI/rendering performance in production systems
• Experience working with WebSockets or real-time streaming architectures
• Deep understanding of profiling, benchmarking, and eliminating frame drops or memory bottlenecks
• Strong systems thinking and architectural decision-making ability
• Engineers from native mobile, cross-platform frameworks, rendering systems, or real-time applications are encouraged to apply.
  
  

• Rare opportunity to work on high-frequency, real-time trading systems
• Production-scale cross-platform architecture (mobile + desktop + web)
• On-device computation and performance-critical workflows
• Direct impact on live trading infrastructure
• Meaningful ESOP participation in a fast-growing fintech company