Senior Full-Stack Engineer

Available for Remote (EU/UK/US)

Senior Full-Stack Engineer | 7+ Years ExpSenior Full-Stack Engineer | SaaS & Distributed Systems Architect

Senior Full-Stack Engineer with 7+ years of experience engineering high-performance SaaS platforms, distributed backend systems, and scalable APIs for US & EU startups. Specialist in Next.js, Node.js/NestJS, and AWS.

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Senior

Expertise

const lead = new SeniorFullStack({

name: "Ayush Donga",

experience: "7+ Years",

focus: ["Scalable Architecture", "Distributed Systems"],

stack: {

frontend: ["Next.js", "TypeScript", "React"],

backend: ["Node.js", "NestJS", "Rust"],

cloud: ["AWS", "Docker", "Kubernetes", "Serverless"],

ai: ["OpenAI", "LangChain", "VectorDBs"]

workflow: {

style: "Async-First",

overlap: "6+ hours (CET / EST / GMT)",

principle: "Ownership over Execution"

}

});

await lead.buildProductionReady({

scalability: "100k+ concurrent users",

security: "Zero-Trust Architecture",

performance: "Sub-100ms Latency"

});

Years Experience

in Full Stack Engineering

Global Senior Engineer

Engineering with Ownership & Business Impact

I am a Senior Full-Stack Engineer focused on solving complex business problems through robust technical solutions. I don't just write code; I own the entire development lifecycle—from architectural decision-making and database design to CI/CD pipelines and production monitoring.

Having worked with distributed teams across the US, UK, and EU, I operate with a remote-first mindset. I prioritize asynchronous communication, clear documentation, and independent problem-solving to deliver reliable software without the need for constant hand-holding.

Remote-First Expert

Self-managed, documentation-driven, and highly communicative. 6+ hour overlap with EU/US.

Product-Minded

I focus on business outcomes, user experience, and ROI - not just clean code.

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Technical Stack

Broad technical expertise grouped by architectural domain.

Frontend

React / Next.js

TypeScript

TailwindCSS

State Management (Zustand/Redux)

Performance Optimization

Backend

Node.js / Express

NestJS / TypeScript

Microservices Architecture

API Design (REST/GraphQL)

Rust / High-Performance APIs

Databases

PostgreSQL (Optimization)

Redis / Caching

Prisma / TypeORM

MongoDB / NoSQL

DevOps

AWS (S3/EC2/ECS/RDS)

Docker & Containerization

CI/CD (GitHub Actions)

Terraform / IaC

Professional Journey

Leading teams and building scalable solutions across different domains.

Senior Full-Stack Engineer & Team Lead

Current

Pardy Panda Studios

Mobile Gaming Studio • 30+ Team

Jan 2023 - Present

Remote (EU/US/UK Market)

Architected a multi-tenant SaaS infrastructure serving 100k+ active users, reducing API latency by 55% through Redis-backed caching and PostgreSQL query optimization.
Scaled cloud operations on AWS using Docker and Terraform, resulting in a 45% reduction in monthly infrastructure spend while maintaining 99.99% uptime.
Led a distributed team of 5 engineers across 3 timezones, increasing sprint velocity by 30% via refined async-first documentation and automated CI/CD pipelines.
Engineered high-throughput microservices using Node.js and NestJS, decoupling legacy monoliths and improving system resilience for peak traffic.
Optimized Next.js ISR strategies and React component libraries, boosting Core Web Vitals to 95+ and decreasing page load times by 40%.

Senior Software Engineer

Saas Innova

SaaS Product Company • 15+ Team

May 2020 - Dec 2022

Remote

Designed and implemented a real-time analytics dashboard handling Millions of events/day, leveraging WebSockets and Node.js for sub-200ms data visualization.
Architected high-performance PostgreSQL schemas and optimized indexing strategies, reducing complex report generation time from 12s to <800ms.
Scaled the core API from a monolith to NestJS microservices, supporting a 3x growth in concurrent requests without degrading performance.
Led the integration of complex 3rd-party FinTech APIs, processing $2M+ in annual volume with a 99.9% transaction success rate.

Software Engineer

Red & White Softech

Enterprise Software Agency • 100+ Team

Jun 2018 - Apr 2020

India

Delivered a comprehensive ERP system for 50+ enterprise clients, automating manual workflows and saving 500+ man-hours/month and reducing operational costs.
Optimized legacy frontend architectures by migrating to a modern React-based stack, resulting in a 60% improvement in developer onboarding speed.
Architected an automated payment processing module handling $500k+ annual volume, reducing transaction failures by 60%.

Production-Grade Work

Selected Case Studies

A deep dive into how I solve complex engineering problems, architect scalable solutions, and drive business impact.

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Lead Full-Stack Engineer

LuxAlgo - Financial SaaS Platform

"High-performance financial SaaS platform serving 50k+ active users with real-time data processing and analytics."

Next.js

Node.js

Stripe API

Redis

PostgreSQL

The Problem

The legacy architecture bottlenecked under heavy load, failing to deliver sub-100ms latency for 50k+ concurrent users needing real-time dashboard updates.

Technical Solution

Decoupled the monolithic backend via Redis Pub/Sub and dedicated Node.js/Python microservices. Implemented an edge-cached Next.js frontend with advanced subscription state management.

Business Impact

Scaled to support 10,000+ concurrent websockets with 99.9% availability. Achieved a Lighthouse score of 95+ for all primary dashboard views.

View Live Project View Code

Lead Backend Architect

Cloud-Native Enterprise ERP

"Mission-critical B2B ERP platform managing global logistics, supply chain workflows, and billing for enterprise clients."

NestJS

TypeScript

Microservices

RabbitMQ

PostgreSQL

Docker

The Problem

Legacy monolithic systems caused 48-hour data sync delays, complicated billing reconciliation, and frequent out-of-memory crashes during peak load.

Technical Solution

Designed a production-grade microservices architecture using NestJS and RabbitMQ. Applied CQRS pattern to separate read and write concerns for high availability and complex reporting.

Business Impact

Eliminated reporting latency, achieving 100% real-time accuracy for 10,000+ daily shipments. Reduced infrastructure failure rates by 90%.

View Live Project View Code

Lead Backend Engineer

High-Concurrency Stream API

"High-concurrency streaming microservice designed for real-time ingestion and processing of substantial data streams."

Rust

Node.js

AWS ECS

WebSockets

Redis

The Problem

The existing Node.js architecture suffered from significant garbage collection latency (up to 200ms) when processing high-throughput 24/7 webhooks and streams.

Technical Solution

Engineered a low-latency ingestion engine using Rust & Tokio with zero-copy parsing. Designed a horizontally scalable architecture on AWS Lambda/ECS.

Business Impact

Achieved 50% faster execution and 40% reduction in cloud costs. Guaranteed deterministic <10ms cold starts for critical real-time operations.

Remote-First Professional

Built for Remote Collaboration

Remote work isn't just a location change—it's a skillset. Here's how I ensure seamless collaboration across time zones.

Time Zone Overlap

Full 8-hour overlap with Europe (CET/GMT) and 5-hour overlap with US East (EST). Available for real-time collaboration during core business hours.

Async-First Communication

Expert in Loom for walkthroughs, Slack for updates, and Notion/Google Docs for detailed technical documentation. Clear, proactive communication style.

Independent Ownership

Daily status reports and solution-oriented updates. Minimal need for constant sync meetings. I unblock myself and keep stakeholders informed.

Global Team Experience

4+ years working with diverse, globally distributed teams. Comfortable with remote-first culture and asynchronous workflows.

What Partners Say

Honest feedback from project managers and business owners I've collaborated with worldwide.

"Ayush is a rare talent. He bridges the gap between deep technical backend architecture and actual business value. His refactoring of our core engine saved us months of rework and scaled perfectly."

Sarah Johnson

Founder & CEO, TechFlow (UK)

"Exceptional ownership. We trusted Ayush to lead our most complex SaaS scaling challenges independently. He delivers production-ready systems with zero technical debt."

Michael Chen

VP of Engineering, CloudScale (US)

"Perfect for remote teams. Proactive communication and documentation standards that set the bar for our entire engineering organization. A true senior operator."

David Miller

CTO, StartupPulse (EU)

Ready to scale your product?

Currently considering new remote opportunities. Available for immediate start or with 2-week notice period.

Open to Full-Time Remote Roles

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Ready to Collaborate?

I am currently available for Senior Remote Roles (EU/UK/US) and Contract Architecture Consulting.
Skip the recruiter spam—let's discuss your engineering challenges directly.

Contact Details

Ready to fast-track your hiring? Book a 15-min intro call or send me an email.

Book a Call

Schedule a meeting via Calendly

Phone / WhatsApp

+91 8140000626

Email Me

ayush.donga20@gmail.com

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GitHub

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