Turn Slow Systems Fast
Replaced a 3-second API with a 200ms solution—15x faster. This allowed the firm to grow without buying more servers.
15xFaster
$0Infra Cost
Available for new projects
Nrishinghananda Roy
Software Engineer
I work across the stack but specialize in Rust backends where performance and correctness matter.
With 3 years of experience, I've built end-to-end high-performance products for startups in Germany, France, and India—turning slow systems into fast, scalable ones.
Right now I'm diving into data-intensive systems, learning Apache Arrow and DataFusion through open source contributions.
How I Drive Business Impact
Technology is just a tool. What matters is solving real problems. Here's how I help startups move faster and scale smarter.
Ship Complete Solutions
I build end-to-end—backend APIs, frontends, DBs, deployments. Shipped a React Native app to the App Store in a month with zero prior mobile experience.
- Full-stack capabilities
- Learn fast, ship faster
- Production-ready from day one
Automate What Hurts
Rewrote document generation at Codefy. Cut manual prep time by 70%. Lawyers got more billable hours; business made more money.
70%Time Saved on Manual Work
What I Bring to Your Startup
01
Problem Solver, Not Just Coder
I don't wait for specs. I understand the business problem and propose solutions.
02
Build for Scale
Managed 50+ blockchain nodes globally. I know what breaks at scale.
03
Technical Depth
Built LSM-tree DBs from scratch. Contributing to Rust Clippy. I understand internals.
04
Learn Any Stack
Zero React Native experience? Shipped to App Store in weeks. I adapt fast.
05
Startup Velocity
Worked across Germany, France, India. I ship fast, iterate, validate.
06
Business Impact First
Every line of code should move metrics. I think ROI, not just "cool tech".
ℹ️
About Technology Choices
Proficient in Rust, TypeScript, React, Vue, PostgreSQL, AWS. But what matters is choosing the right tool for the problem.
Professional Journey
Current
Software Engineer
Nov 2024 - PresentFreelance | Remote
- Project: ISKCON Phoenix App - developed and launched a React Native mobile app to the Apple App Store, securing 100+ downloads and driving engagement for festival attendees.
- Project: EdTech Platform - architected a secure Rust (Axum) backend for medical admissions, leveraging AWS DynamoDB to achieve single-digit millisecond latency and ensuring 100% data integrity for sensitive student documents.
- Actively contributing to the Rust open-source ecosystem (OpenObserve, Rust Clippy).
Software Engineer
Nov 2023 - Oct 2024Codefy GmbH | Remote, Germany
- Eliminated a critical performance bottleneck by replacing a third-party Java microservice with an in-house Rust service, rebuilding 21 APIs with Rust (Axum) and PostgreSQL. Reduced p95 response times from 3+ seconds to < 200 ms (15× improvement), enabling business growth without additional infrastructure costs.
- Reduced manual operational effort by 70% and accelerated document generation by 7×, automating legal workflows by rewriting Python pipelines in Rust with custom PDF/DOCX parsing and S3 uploads.
- Improved React frontend performance by 60% for high-frequency workflows by implementing advanced caching strategies with Tanstack Query and refactoring component architecture.
- Built end-to-end features for a legal case management system used by 20+ lawyers. Worked extensively across React/TypeScript frontend and Rust (axum) backend to ship client intake, document automation, case tracking, and sales workflows.
Associate Software Engineer
Apr 2023 - Oct 2023Dhiway | Remote, India
- Orchestrated production blockchain infrastructure across 50-55 global nodes, automating provisioning with Terraform on AWS EC2 to ensure high availability.
- Optimized cloud costs by ~20% for a fleet of 55+ global nodes by using Prometheus/Loki metrics to right-size EC2 instances, reducing infrastructure overhead while maintaining system performance.
- Accelerated release cycles by building a fully automated CI/CD pipeline with integrated security scanning, enabling seamless production deployments with high stability.
Frontend Developer
Jan 2022 - Mar 2023Trustforum | Remote, France
- Architected a scalable Vue 3 component system using TypeScript and the Composition API, establishing a state management layer that supported rapid feature delivery for an early-stage community platform.
- Introduced modular, reusable components that reduced new feature development time by ~30% and lowered long-term maintenance costs by minimizing code duplication.
Open Source Impact
Contributing to tools developers use daily.
Featured Projects
Jagannath Ratha Yatra App
App Store ↗Shipped to App Store in weeks with zero prior mobile experience. Handles festival info, real-time volunteer management, and role-based auth. 100+ Downloads.
LSM-Tree Key-Value Database
GitHub ↗Built a persistent Key-Value store in Rust achieving O(1) write performance via Memtables and efficient O(log N) lookups using SSTables and Bloom Filters.
Engineered 5 distinct database subsystems from scratch (Write-Ahead Log, Memtable, SSTable, Bloom Filter, Compaction Strategy) to handle crash recovery and storage optimization.