Freelance Backend Engineers in Saint-DenisFreelance Backend Engineers in Saint-Denis
ProjectsPeople
Halil Aydin's avatar
Halil Aydin
proParis, France
Fullstack Engineer | SaaS, Next.js, Node.js & React Native
2x
Hired
5.0
Rating
66
Followers
REPLIT_EXPERT

Expert

Fullstack Engineer | SaaS, Next.js, Node.js & React Native
Cover image for Full-Stack E-commerce Operations Platform
Full-Stack E-commerce Operations Platform
2
16
Cover image for Scalable Hosting Platform Design & Development
Scalable Hosting Platform Design & Development
1
59
Cover image for Mobile E-commerce Operations App - React Native & Expo
Mobile E-commerce Operations App - React Native & Expo
2
12
Cover image for Profitability Dashboard - Ad Spend
Profitability Dashboard - Ad Spend Analytics Detail
3
429
Backend Engineer(2)
Ben Degbe's avatar
Ben Degbe
proParis, France
Expert in Prismic, Next.js, Strapi & Shopify — with 5+ years
$1k+
Earned
1x
Hired
5.0
Rating
52
Followers
Expert in Prismic, Next.js, Strapi & Shopify — with 5+ years
Cover image for Tilyo: France's top online CBD shop
Tilyo: France's top online CBD shop
2
10
Cover image for Railflow: (NextJs-Prismic-DotLottie-Typescript-Tailwind)
Railflow: (NextJs-Prismic-DotLottie-Typescript-Tailwind)
1
9
Cover image for Nuelit - Career Services Platform Development
Nuelit - Career Services Platform Development
0
21
Cover image for Digidzign – AI-Powered Digital Ecosystems & Company Platform
Digidzign – AI-Powered Digital Ecosystems & Company Platform
0
23
Backend Engineer(2)
Guillaume Derivery's avatar
Guillaume Derivery
Paris, France
CTO / Fullstack dev / CPO. On Scope, on Time, on Budget.
5.0
Rating
11
Followers
CTO / Fullstack dev / CPO. On Scope, on Time, on Budget.
Cover image for Lawpair Fullstack Platform
Lawpair Fullstack Platform
1
13
Cover image for Chivy App & Platform Redevelopment
Chivy App & Platform Redevelopment
1
16
Cover image for Pety Fullstack Insurtech Platform
Pety Fullstack Insurtech Platform
1
14
Cover image for Cultivate Minting Platform
Cultivate Minting Platform
1
12
Backend Engineer(1)
Eriel Cruz's avatar
Eriel Cruz
Paris, France
Building Modern Websites & Deploying Self-Hosted Apps
$1k+
Earned
3x
Hired
5.0
Rating
5
Followers
Building Modern Websites & Deploying Self-Hosted Apps
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Professional Photography Website Gallery
0
6
Cover image for Modern and Responsive Business Website creation
Modern and Responsive Business Website creation
0
14
Cover image for Global Deployment of Self-Hosted Applications
Global Deployment of Self-Hosted Applications
0
12
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Backend Engineer(2)
Sathwika Bandaru's avatar
Sathwika Bandaru
Saint-Denis, France
AI Engineer building LLM, RAG & AI automation solutions
New to Contra
AI Engineer building LLM, RAG & AI automation solutions
Cover image for Collaborative project, contributed key production
Collaborative project, contributed key production components of Med-V²QA, a clinical Visual Question Answering system built on the MUMC architecture for radiology image analysis. My contributions: built the Dual-Gate Guardrail System (Gate 1 rejects non-medical intent, Gate 2 uses a local CLIP classifier to reject non-medical images ensuring clinical safety and system focus); developed the Batch Triage module using zero-shot CLIP to automatically sort and prioritise the most abnormal scans from uploads of up to 20 images; integrated Voice I/O using OpenAI Whisper for speech-to-text transcription and gTTS for audio readout of answers; built the PDF report generation module producing structured clinical reports with patient data, notes, and VQA results; and developed the FastAPI backend handling high-performance async request processing across all services. Built as part of a team my work covered the safety layer, multimodal I/O, clinical reporting, and backend API infrastructure.
0
28
Cover image for Collaborative project built at Kaggle
Collaborative project built at Kaggle Week 26 GenAI Hackathon, contributed the core AI engineering layers of a Business Law RAG Assistant that answers legal document queries with source citations and live faithfulness verification. My contributions: built the hybrid FAISS + BM25 retrieval pipeline for accurate document search; designed the multi-agent orchestration system coordinating retrieval, generation, and verification agents; implemented the faithfulness verification layer to evaluate and score LLM output quality; integrated an MCP tool server enabling live web search as a fallback; and built the analytics dashboard tracking query performance and retrieval metrics. Built as part of a 4-person team, my work covered the RAG pipeline, agentic architecture, and evaluation infrastructure.
0
34
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Built as part of a team, my contributions covered the pipeline orchestration, model serving, and data infrastructure layers.
0
36
Cover image for Built a Medical NLP system
Built a Medical NLP system that processes clinical text to extract healthcare entities, redact sensitive information, and structure unstructured medical data using NER pipelines and FastAPI for backend integration.
0
44
Backend Engineer(1)
Oliver Belliard Abreu's avatar
Oliver Belliard Abreu
Paris, France
Senior Full stack and DevOps Engineer
Senior Full stack and DevOps Engineer
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Front-Desk-Dallas
0
8
Cover image for 2219 MECHACHAIN
2219 MECHACHAIN
0
9
Cover image for Cook Islands Tourism 360° Virtual Tour
Cook Islands Tourism 360° Virtual Tour
0
12
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Backend Engineer(1)