About
I build REST APIs in Node.js and NestJS on PostgreSQL, along with the reliability work around them: idempotent writes, retries with backoff, queue-based processing and scheduled jobs. I also integrate LLMs, with schema-validated output and tiered model routing. I have been working independently for UK SaaS clients since January 2026, and I am finishing an MSBA at KSBL (graduating December 2026), which is moving me toward data / analytics engineering and AI-assisted backend roles. I am looking for work as soon as possible: remote, Karachi on-site, or relocation after December 2026.
Work Experience
- Spot: UK B2B workplace wellbeing SaaS on TypeScript and NestJS. Stripe Connect tiered subscription billing, GDPR data handling (hard delete, anonymisation, export), timezone-aware processing. 357 automated tests, 18 database migrations. Deployed on Render, never launched to users.
- Spot cost drivers: the deployment was heading for its hosting provider's usage ceiling. I traced it to queue settings, an uptime check waking the database every minute, and overlapping scheduled jobs, and fixed each at its source instead of upgrading the plan.
- Spot missed records: daily processing silently left out contacts and accounts because it filtered on the wrong field. I fixed the cause and verified end to end against a local database reproducing the deployed data.
- AgencyView: reporting platform for a UK SaaS founder. PostgreSQL-driven engine with 13 report types and output filtered by user role; ingestion as a scheduled pipeline with bounded concurrency, retries and structured logging.
- spot-nlp-sidecar: a Python FastAPI service built to run alongside Spot. PII redaction with spaCy, outlier scoring with an Isolation Forest, and sentiment gating with sentence embeddings.
- Client work in Denmark and Pakistan. The UK client was originally a Blocship client; the account was handed to me directly and I have run it myself since January.
Education
Skills
Backend
Data
AI / LLM
DevOps & testing
Also working across
Backend systems and own projects
Client work, work from my roles, and my own projects.
Groops
BlocshipBackend for a platform for organisations. NestJS on Clean Architecture; the backend moved from Lumen to Laravel to NestJS.
16 modules · 73 migrations · 81 entities · 472 test suites
Spot
Independent, deployed on Render, never launchedUK B2B workplace wellbeing SaaS: tiered subscription billing, GDPR data handling and timezone-aware processing.
357 automated tests · 18 migrations
AgencyView
IndependentReporting platform for a UK SaaS founder. Deterministic report engine, output filtered by user role, ingestion as a scheduled pipeline with retries.
13 report types
spot-nlp-sidecar
Independent, built to run alongside SpotPython FastAPI service with three endpoints: PII redaction, outlier scoring and sentiment gating.
3 endpoints
MaidMe
BlocshipHome-services marketplace for providers in Norway. A NestJS socket server added beside a live Laravel backend for real-time booking management and in-app support chat.
Socket server beside a live backend
QR-code points programme
Blocship, vehicle-parts distributorNestJS backend for point issuance, redemption and transfer, with balance changes written transactionally so a failed transfer cannot leave value in two places. Includes the points reporting the distributor used to pay back its buyers.
Transactional balances
ALLDost (Active LifeStyle Dost)
Own projectFitness and calorie app that turns plain-language meal and workout entries into structured records, with Gemini output validated by Zod. About 5 friends-and-family users: a portfolio product, not a business. Every AI-generated food entry is held as unverified until a reviewer approves or corrects it. Native app (React Native / Expo) in progress.
15 Playwright reviewer tests
FiTE
SybridBilingual (English/Japanese) hiring portal for IT engineers, with role-based access across four user groups, OWASP-aligned security and an admin panel.
4 user groups
Mercenary Starter API
Open sourceDockerised, modular NestJS starter for SaaS backends, with access control, billing, security headers and API docs already wired in.
Open-source backend starter
TaskBreak
Own projectAgentic workflow demo that breaks long, unstructured project briefs into ordered, structured checklists. GitHub Actions for continuous integration.
Task decomposer
Interactive pieces built for this site
A terminal, a simplified architecture explorer and a simulated API console.
Developer shell
Type commands to query my experience and projects.
Architecture explorer
Pick a project to see how its main pieces fit together.
Spot: Billing, GDPR Handling and Scheduled Processing
357 tests | 18 migrationsBackend for a UK B2B workplace wellbeing SaaS. Deployed on Render but never launched to users. This is a simplified view of how its main pieces fit together.
REST API
Requests validated and routed by NestJS modules.
Tiered Billing
Subscription tiers handled through Stripe Connect.
Scheduled Jobs
Daily processing that is timezone-aware, with overlapping runs fixed at the source.
GDPR Handling
Hard delete, anonymisation and data export.
Database
18 migrations on PostgreSQL.
Notes
❯ Cost drivers
The deployment was heading for its hosting provider's usage ceiling. I traced it to queue settings, an uptime check waking the database every minute, and overlapping scheduled jobs, and fixed each at its source instead of upgrading the plan.
❯ Missed records
Daily processing silently left out contacts and accounts because it filtered on the wrong field. I fixed the cause and verified end to end against a local database reproducing the deployed data.
❯ Repeat safety
Writes are idempotent, external calls retry with backoff, and slow work runs on queues instead of in the request path.
REST API explorer
Simulated requests against a mock API. Nothing is sent anywhere.
Returns professional summary and core tech stacks.
Get in touch
Hiring, or have a project in mind? Send a message below or write to omer.habib62@gmail.com.