Real estate
Real Estate Operations Platform
Modernizing a decades-old real estate platform: 50M+ records migrated from ASP1/MSSQL to NestJS, with page loads cut from 60s+ to under 1s.
- Amazon Web Services (AWS)
- React
- Nest JS
- Redis
Sifat Rabbi Staff Software Engineer | Software Architecture & Technical Leadership
I build and modernize production systems for healthcare, fintech, and AI teams, from legacy migrations to new products, owning architecture, development, and deployment end to end. Production work has also shipped in automotive, real estate, and eCommerce.
Next.js · NestJS · TypeScript · PostgreSQL · AWS
Open to Staff, Principal, and Lead roles · remote or onsite
Work
Selected work
Production systems with architecture, constraints, and measured outcomes.
Industries
Where the work has shipped
Primary depth in AI, healthcare, and fintech. Production work has also shipped in automotive, real estate, and eCommerce.
Primary focus
Proven in
Career
Experience
7 years across 11 roles.
– Present
PresentSenior Software Engineer
- Architected and delivered the entire platform from scratch, covering front end (Next.js), back end (Payload CMS and API routes), PostgreSQL database design, third-party integrations, and production deployment on Netlify.
–
Full Stack Developer
Clerk Data LLC (Via Toptal)·9m
- Migrated a legacy ASP1/MS SQL application to a modern NestJS/React stack, eliminating technical debt from a Windows 95-based system and establishing a scalable, cloud-native architecture on AWS.
–
Full-stack Engineer | Health Benefits Product
- Improved scalability to meet client's requirements.
–
Full-stack Engineer
A Toptal Client·3m
- Developed multiple apps using Next.js with serverless functions.
Testimonials
What people say
From clients and people I've worked with.
“He delivered an initial version extremely fast so we could provide feedback quick and after some iterations we achieved a solid end version. I really liked his communication skills and that he offered an excellent support.”
UC
Upwork Client
Client on Upwork
Client
“He is someone you can rely on to finish any tasks on his own. He not only does the work assigned, but also shows proactiveness in suggesting better alternatives.”
YS
Read full recommendation on LinkedInYemin Sajid
Co-Founder, CEO at Greentech Apps Foundation
Worked together
“He is a great engineer and an outstanding team player with rich experience in software development and is always willing to lend a hand to anyone who needs it. Any company would be lucky to have Sifat on their payroll.”
MN
Read full recommendation on LinkedInMd Ashif Al Nowajesh
Senior AI Solution Architect
Worked together
Writing
Recent writing
First-hand notes from production work, interviews, and tools I actually used.
Next.js vs React for Dashboards: Why I Changed My Approach
After years of using Next.js, I realized it wasn't always the right choice, especially for data-heavy dashboards. Here's what changed my perspective and how I choose my stack today.
TechnologyDoppler Review: Managing Secrets from Development to Deployment
I started using Doppler because I was tired of managing environment variables between my Linux desktop and MacBook. But Doppler does much more than that. Here's my experience with it and how it can simplify secrets management from local development to deployment. Copy
TechnologyTyping DNA - My First AI tool in Software Engineering
The first AI tool I ever worked with as a software engineer wasn't ChatGPT or anything close to it. It was TypingDNA, a tool that identifies you by the unique rhythm of your typing, and I helped the team to integrate it into an exam proctoring system with only 6 months of experience under my belt.
Technology
Contact
Let's work together
If you're hiring for a Staff, Principal, or Lead role (remote or onsite), or building something in healthcare, fintech, or AI, email me and we can talk it through.
Open to full-time and part-time roles (remote or onsite)
Also on Toptal. Email is the best way to start a conversation.