Sandeep Singh - Full-Stack Engineer | Elixir, Rails, Node.js

My Story

I've been the stakeholder, the founder, and the engineer. That order matters.

From the business side in

I didn't start as a programmer. I started running IT for a hotel in India — replacing paper billing with cloud POS, putting rooms online. That's where I learned the lesson that still shapes how I work: technology only matters when it makes the business run better.

Then I co-founded a software company, building products for healthcare and media clients. As a founder you don't get to say "not my job" — you own the outcome, the budget, and the relationship. I've carried that ownership into every team since.

Most recently I spent four years as the principal developer at Salle Privée, a Montreal event-venue marketplace — designing the architecture, building the product, and running it in production. When you're the one answering for the whole system, you learn to build what's needed, not just what's asked.

Founder's Mindset

I've run a company. I think about cost, risk, and revenue — not just code.

End-to-End Ownership

From database schema design to CI/CD pipelines to production incident response — one person accountable for the whole system.

Technical Depth

Elixir/Phoenix LiveView, Ruby on Rails, Node.js/TypeScript, PostgreSQL, AWS, Docker

How I Work

Four principles from a decade of owning production systems

What's needed, not just what's asked

When the feature you asked for is the wrong one, I'll say so — and show you what I'd build instead and why. You get an honest engineering partner, not a yes-machine working through tickets.

Your vision becomes my vision

I don't work for companies, I work as part of them. I learn the business model, sit with the people who feel the pain, and make technical calls that serve where the company is going — not just the sprint in front of me.

Own it end to end

Schema design, payments, real-time features, CI/CD, monitoring, the incident at an inconvenient hour — I take responsibility for the whole system, not a slice of it. Software I ship is software I operate.

Stakeholders stay in the loop

Founders and non-technical partners always know where things stand, what things cost, and what the trade-offs are — in plain language. Good engineering includes making sure the people around it are doing well.

Featured Work

Real projects solving real business problems

FLAGSHIP — 4 YEARS AS PRINCIPAL DEVELOPER

Salle Privée — Event-Venue Marketplace

A production SaaS platform connecting event organizers with venue providers in Montreal. I was the principal developer for four years — from architecture through production monitoring.

View Live Platform → 🚀

The Challenge

A two-sided marketplace needs everything a big product team builds — search, quoting, real-time messaging, payments, admin tooling — but here it all had to be designed, shipped, and kept running reliably by one accountable engineer.

What I Built

An Elixir/Phoenix LiveView core on PostgreSQL with a 44-table domain model, plus Node.js microservices for PDF generation and image processing. Stripe payments with refund workflows, real-time messaging over Phoenix Channels, and multi-channel notifications (email, SMS, in-app) on Oban background jobs. I also owned the infrastructure: Docker, GitHub Actions CI/CD, AWS, and incident response with Sentry.

The Scope

44

Table Domain Model

3

Notification Channels

4 yrs

Sole Technical Owner

24/7

Live in Production

Elixir / Phoenix LiveView PostgreSQL Node.js Stripe AWS Docker

4 Years

One platform, owned end to end

Full Stack

Architecture to operations

Real-Time

Messaging, payments & search

CO-FOUNDER

ZENI Applied Sciences

Co-founded a software firm serving healthcare and media clients. We shipped a real-time news aggregator app and an operations platform for a multi-location clinic franchise — scheduling, workflows, and management in one place.

Real-time news app on Flutter & Firebase

Clinic-franchise web platform

Delivery across small client teams

Flutter Firebase Web

CLIENT PROJECT

Levart

A workflow automation platform for business process orchestration, built in Ruby on Rails — turning manual, error-prone processes into structured flows.

Task automation engine

Approval flows & process management

Backend logic & data modeling

Ruby on Rails Automation

ALWAYS RUNNING

My Own Infrastructure

The page you're reading is served from infrastructure I run myself: a multi-server Docker Swarm with its own deploy pipeline, container registry, databases, object storage, and off-site backups. I don't just talk about operations — I live with them.

Self-hosted PaaS on Docker Swarm

Private registry, Postgres, S3-compatible storage

Automated backups to a dedicated server

Docker Swarm Traefik Linux

Want to go deeper on any of these?

Ask Me About the Details

View Public Repos on GitHub

What People Say

Recommendations from colleagues and clients

EB

Eric Benoit

Consultant informatique @ Cyber Atlantide

March 2022

"I'm very happy to give a recommendation to Sandeep. He is highly efficient and focused developer. As a technician myself I really like working with him. He very good at finding solutions to any complex problems. His passion to satisfy the client makes the understanding easier to get for me and him. Sandeep knows applications development very well and his skills are helped me to organize my grow."

RK

Rahul Kumar

Product Director @ Revivo Technologies

May 2020 • Managed Sandeep directly

"I am happy to write recommendation for Sandeep. He is highly productive and focused person. As a team mate he is fun to work with. He is innovative in nature and and good at finding solutions to complex problems. His passion for computer and technology makes things easier to do. Sandeep knows web-development and mobile development very well. His managerial skills are stunning, and helped the organisation to grow."

View More Recommendations on LinkedIn

The Journey

From a hotel front desk in India to owning a production platform in Montreal

2015 — Sasaram, India

IT Manager, Maurya Royal

My first job was making technology serve a business, not the other way around: replacing manual billing with cloud POS and putting the hotel's rooms online. I've thought like an operator ever since.

2017 — Noida, India

Co-Founder, ZENI Applied Sciences

Started a software company building web and mobile products for healthcare and media clients. Three years of owning outcomes — code, deadlines, budgets, and relationships.

2020 — Noida, India

Full-Stack Developer, Anand Soft World

Client web applications across the full product lifecycle — frontend, backend, and the REST APIs connecting them to the outside world.

2022 — Montreal, Canada

New country, new degree, one platform

Moved to Montreal, completed a DEC in Computer Science at Collège LaSalle, and joined Salle Privée — where I spent four years as the principal developer of their event-venue marketplace, owning it from schema design to production incidents.

2026 — Now

Looking for the next company to build with

Four years, one platform, delivered. I'm looking for the next team whose vision I can make my own — as an embedded senior engineer or a hands-on technical partner.

Tech Stack

Backend

Elixir / Phoenix (LiveView, Oban)
Ruby on Rails
Node.js / TypeScript
REST APIs & WebSockets

Frontend

Phoenix LiveView
React
Svelte
Tailwind CSS

Data & DevOps

PostgreSQL
Redis
MongoDB
Docker & CI/CD

Cloud & Ops

AWS (EC2, RDS, S3, SES)
GitHub Actions
Sentry & Monitoring
Linux Servers

Let's Build Together

If you're hiring a senior engineer who'll treat your company like their own — or you need someone to own a system end-to-end — I'd love to hear what you're building.

Email

[email protected]

GitHub

@sandeep2194

Location

Montreal, Canada

Available for:

Full-Time Roles Contract Development Technical Consulting Architecture & Code Review Mentoring

Based in Montreal • Remote-friendly • On-site in the Montreal area

I build like it's my own company