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You will get an optimized your Node.js API and PostgreSQL database for speed
Rising Talent
Rising Talent
Project details
Is your Node.js application struggling to handle traffic? Are slow API responses hurting your user experience?
I am a Senior Backend Engineer who specializes in making slow apps fast. I don't just write code; I re-architect systems for scale.
My Results:
Fintech: Reduced API latency from 1.2s to 150ms (87% faster) for a platform handling $5M+ in transactions.
Scale: Successfully migrated 170,000+ users with zero downtime.
Reliability: Built offline-first sync engines that process millions in payments.
What I will do for you: Depending on the tier you select, I will:
Audit: Identify N+1 queries, missing indexes, and event loop blockers.
Optimize: Rewrite inefficient PostgreSQL queries and implement index strategies.
Scale: Implement Redis caching to reduce database load by up to 60%.
Tech Stack: Node.js (NestJS/Express), PostgreSQL, Redis, TypeScript, Docker.
Stop losing users to loading screens. Order now to get a production-grade backend optimization.
I am a Senior Backend Engineer who specializes in making slow apps fast. I don't just write code; I re-architect systems for scale.
My Results:
Fintech: Reduced API latency from 1.2s to 150ms (87% faster) for a platform handling $5M+ in transactions.
Scale: Successfully migrated 170,000+ users with zero downtime.
Reliability: Built offline-first sync engines that process millions in payments.
What I will do for you: Depending on the tier you select, I will:
Audit: Identify N+1 queries, missing indexes, and event loop blockers.
Optimize: Rewrite inefficient PostgreSQL queries and implement index strategies.
Scale: Implement Redis caching to reduce database load by up to 60%.
Tech Stack: Node.js (NestJS/Express), PostgreSQL, Redis, TypeScript, Docker.
Stop losing users to loading screens. Order now to get a production-grade backend optimization.
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$250
|
Standard
$950
|
Advanced
$2,500
|
|---|---|---|---|
| Delivery Time | 2 days | 5 days | 14 days |
Number of Revisions | 0 | 1 | 2 |
Design Customization | |||
Content Upload | |||
Responsive Design | |||
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$450 - $3,500
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JD
Joseph D.
Feb 27, 2025
Update React Native App
Very good developer. The project finished with no bugs!
GC
Ghassan C.
Oct 3, 2024
Christian Praying App
Great developer, I advise working with him.
very professional and respect deadlines.
very professional and respect deadlines.
DT
Daniel T.
Mar 3, 2024
React Native Developer
It was great working with Emmanuel
SK
Savan K.
Dec 16, 2021
I develop many application i want to upload in playstore
ML
Maksym L.
Dec 7, 2021
Mobile application developer Android
About Emmanuel
Fintech Engineer | African Payment Systems | React Native | NestJS
100%
Job Success
Accra, Ghana - 12:18 pm local time
I'm a full-stack engineer with 6 years of experience specializing in backend systems, mobile apps, and AI-assisted fintech products across African markets.
I'm the co-founder and founding engineer of SusuPaa, a platform that digitizes Ghana's traditional susu savings groups and handles real-money mobile money flows via MTN MoMo, Vodafone Cash, and AirtelTigo. I also built Voltax, an open-source TypeScript SDK that unifies African payment gateways under a single API, used by developers across the continent.
On the technical side, I work across:
Backend: NestJS, Node.js, PostgreSQL, Apache Fineract, REST & GraphQL APIs
Mobile: React Native, Expo SDK, Expo Router, TanStack Query
AI integration: Anthropic Claude API, OpenAI API, LLM-powered product features
Cloud & DevOps: Docker, Traefik, Dokploy, cloud deployments
I use AI-assisted development workflows daily, shipping production-ready features significantly faster without cutting corners on architecture or reliability.
What sets me apart isn't just the tech stack. It's understanding why African fintech is different, informal savings culture, mobile money as the primary rail, low-bandwidth constraints, and trust as the core product feature. I build with that context baked in.
I've worked with companies including Hubtel (Ghana's largest payment processor), Built Financial Technologies, and Commonwealth/Fetch Agent, and I bring that enterprise-level thinking to every project regardless of size.
If you're building something in fintech, payments, or mobile-first products, especially for African or emerging markets, let's talk.
Steps for completing your project
After purchasing the project, send requirements so Emmanuel can start the project.
Delivery time starts when Emmanuel receives requirements from you.
Emmanuel works on your project following the steps below.
Revisions may occur after the delivery date.
Performance Audit & Profiling
I will run benchmarks on your current API to establish a baseline. I'll inspect your codebase for N+1 queries, event loop blockers, and unoptimized database schemas.
Database & Query Optimization
I will rewrite inefficient SQL queries, add missing indexes to PostgreSQL, and refactor the data layer to ensure fast retrieval.