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Portfolio · 2026

Emmanuel Devins

Senior Fullstack Software Engineer Looking for new challenges
Emmanuel Devins

PHP · Symfony · Laravel · TypeScript · React · Python · AWS · Elasticsearch · event-driven architecture · AI-native platforms · multi-tenant APIs · legacy modernization

Fullstack & platform engineer with 10+ years shipping production systems across Switzerland and France. I architect AI-native platforms end-to-end — from event-driven Symfony/Laravel backends and React/TypeScript apps to fleets of LLM agents running in production — most recently in regulated health-tech. I turn messy legacy systems into scalable, well-tested platforms teams can build on.

Experience

  1. 03/2022
    → present
    Geneva, Switzerland
    / 01

    Technical Integration Lead — Backend & Platform Engineering

    Biostarks

    Full-stack ownership of Biostarks’ biomarker testing platform — Symfony back-office and REST APIs, Patient/PRO apps with a multi-tenant white-label partner layer, an AI-native stack (retrieval, production agents, orchestration), laboratory pipelines, and AWS/Shopify delivery.

    • Designed and evolved a Symfony back-office used as the operational CMS — patient and practitioner management, kit and results lifecycle, email templating, system reference data (biomarkers, translations, food, internal tools), agent prompt configuration, and AI job status tracking.
    • Designed and shipped the production REST API powering Patient and PRO applications — kit lifecycle, results, insights, patient/practitioner management — and public partner APIs with OAuth2 for result rendering in external applications.
    • Built Patient and PRO React applications and the multi-tenant white-label layer for partner organizations (laboratories, supplement brands, B2B) — partner personalization, tenant isolation, HL7 import, results viewing/sharing, PDF and genomic upload, and structured health intake; PRO adds multi-patient management.
    • Co-developed Biostarks’ AI-native platform end-to-end (RAG + agent orchestration):
      • Data — Elasticsearch biomarker authority file (1,200+ entries) as semantic-retrieval ground truth.
      • Agents — production LLM agents: Maurice (context-aware multi-biomarker clinical scoring), Henri (OCR / HL7 / multi-lab PDF document intelligence), Sally (genomic value extraction), Clyde (multilingual translation).
      • Orchestration — Symfony event-driven back-office running versioned, peer-reviewed prompts and jobs in production, with PII/PHI anonymization before every external LLM call.
    • Built internal operational copilots on Claude CoWork for Slack / Notion signal-mining, autonomous task generation with peer-review gates, quality supervision, and daily structured reporting.
    • Built Labsoft (Laravel and Python pipelines) transforming raw laboratory data into client-ready results — computation, normalization, and distribution — via REST APIs and webhooks.
    • Owned AWS infrastructure and deployment workflows for platform services, and delivered the headless Shopify Hydrogen storefront migration with e-commerce tracking.

    ✎ Recommendation

    “While I know Emmanuel best as a Technical Lead, I have no reservations recommending him for larger roles with increased responsibility. He will be a valuable asset to any organization.”

    Mark Baker — Former CTO, Biostarks · 2023-01-13

    Read full letter →

    Stack

    • Claude Skills
    • Claude Agent SDK
    • Claude CoWork
    • MCP
    • Cursor
    • OpenAI Platform
    • RAG / Semantic retrieval
    • LLM orchestration
    • Prompt versioning
    • Document intelligence
    • PHP
    • Symfony
    • Laravel
    • Python
    • TypeScript
    • ReactJS
    • Elasticsearch
    • AWS OpenSearch
    • Docker
    • AWS
    • CloudFormation
    • Supervisor
    • CI/CD
    • REST API
    • OAuth2
    • Webhooks
    • HL7
    • Shopify Hydrogen
    • Metaobjects
    • Event-driven
    • GA4 Measurement Protocol
    • Meta Conversions API

    Tags

    • AI-native Architecture
    • Production LLM Systems
    • Multi-agent Orchestration
    • RAG / Semantic Retrieval
    • Document Intelligence
    • Multi-tenant
    • White-label
    • Platform Engineering
    • Event-driven Architecture
    • API Design
    • Fullstack Development
    • Headless E-commerce
  2. 10/2023
    → 01/2026
    Annecy, France
    / 02

    Co-founder & CTO

    The Hush Market

    • Built a B2B SaaS platform from scratch (Laravel backend, React/TypeScript web, React Native mobile) — 600+ organizations onboarded, 2,000+ resources managed, 20,000+ active users.
    • Proprietary matching engine scoring resource compatibility on 50+ real-time criteria with automatic prioritization — designed for performance and maintainability.
    • Bidirectional CRM integrations (apimo, hektor, immofacile, netty) with deduplication, weekly sync, and webhook-driven updates.
    • Secure inter-organization messaging, granular per-resource access controls, and role-based permissions across agency hierarchies.

    Stack

    • PHP
    • Laravel
    • ReactJS
    • TypeScript
    • React Native
    • REST API
    • Webhooks
    • CRM integrations

    Tags

    • B2B SaaS
    • Platform from scratch
    • Resource management
    • API integrations
    • Multi-organization
  3. 01/2020
    → 03/2022
    Chavanod, France
    / 03

    Fullstack Web Developer

    Web Expert Business

    • Maintained and supported the Miliboo e-commerce platform (9.5m annual visitors, partnership with M6 group).
    • Built internal VueJS applications (customer support, analytics, ops) on a centralized Laravel GraphQL API.
    • Maintained the dev ecosystem: CI/CD pipelines, unit testing (PEST), linting (phpcbf).

    Stack

    • PHP
    • Laravel
    • GraphQL
    • VueJS
    • Elasticsearch
    • Redis
    • Docker

    Tags

    • E-commerce
    • Intranet
    • Customer Support
    • Analytics
    • Electron App
    • Unit Testing (PEST)
    • CI/CD
    • Dev Tools
  4. 08/2015
    → 01/2020
    Geneva, Switzerland
    / 04

    Developer / Lead

    Esperite Group (Cryo-Save, Genoma)

    • Maintained and developed the client-management system: contracts, invoices, patient data, lab results, with business automations (certificates, confirmation letters) — European cord blood bank, 300,000+ clients in a regulated ISO/QMS environment.
    • Built a sales application: lead qualification, scoring, and opportunity forecasting.
    • Delivered a call-center system: campaign management, call scripts, intelligent call queue, and analytics dashboards (call duration, conversion, refusal/agreement rates).
    • Built an HR intranet: leave, expenses, hierarchical approval workflows, an advanced permissions system, and a dynamic org chart.

    Stack

    • PHP
    • REST API
    • Yii
    • Python
    • MariaDB
    • MySQL
    • SuiteCRM
    • Bash

    Tags

    • HealthTech / Biotech
    • Cord Blood Bank
    • Regulated (ISO/QMS)
    • CRM
    • Machine Learning
    • Genetic Diagnostics
    • Sales / Lead Scoring
    • Call Center
    • HR Intranet
    • Analytics Dashboards
    • Team Lead

Selected work

  • Metabolic Health — overview

    Overall score, interactive categorical hexagonal map — cross-domain insights generated by Maurice (context-aware multi-biomarker correlations).

  • Biomarker detail

    Longitudinal Highcharts visualization with clinical zones — personalized benefits and pedagogical concepts powered by Maurice.

  • Structured protocols capture

    Capture of therapeutic protocols (GLP-1, TRT, HRT, Metformin, thyroid, statins, fasting…) — feeds Maurice's context-aware scoring directly.

  • External lab import

    Standard Lab Panel imported from a third-party lab (PDF) via Henri (OCR + normalization to the authority schema), with summary and clinical insights by Maurice.

Practitioner portal

pro.biostarks.com ↗
  • Patient view — practitioner

    Practitioner reviews a patient's Metabolic Health panel — longitudinal data and clinical insights by Maurice.

  • Genomics dashboard

    Pathways covered, variants identified, genes scanned, cumulated reports — PDF extraction by Sally.

  • Lab tests list

    All of a patient's tests (Standard Lab Panel, Metabolic Health, etc.) with scores and chronological history.

  • Recommendations plan & connected ecosystem

    Contextualized recommendations (nutrition, activity, sleep, supplements, diagnostic) by Maurice, with wearables / third-party app integrations (Withings, Lifesum, Strava, Oura).

E-commerce storefront

biostarks.com ↗
  • Storefront — landing

    Shopify Hydrogen storefront hero — direct copy, social proof (8,000+ clients, 4.77/5, 100k+ tests), primary CTA.

  • Storefront — How it works

    4-step onboarding section (order, collect, results, follow-up) with product visuals and benefits.

  • Storefront — Platform pathway coverage

    Biomarker taxonomy: pathway coverage (Methylation Axis, Nutritional Sufficiency, Endocrine, Gut Health…) — pedagogical narrative.

The Hush Market — Marketing site

Co-founded · 2023–2026
  • Landing — social proof & metrics

    The Hush Market hero — 20,000+ active buyers, 1,600+ potential matches, 4.8/5 average rating, open to all real-estate professionals.

  • Without / With The Hush Market

    Comparative view of problems solved for agents: access to the largest pro network, simple or exclusive mandate sharing, pre-written messages.

  • B.O.R.I.S. — matching engine

    Per-property compatibility score (95%+), real-time analysis on 50+ criteria (surface, location, budget, price), automatic opportunity prioritization.

  • Bidirectional CRM integrations

    Weekly sync with major real-estate CRMs (apimo, hektor, immofacile, netty, ubiflow) — property + client request import/update, dedup.

The Hush Market — Pro app

RENT Paris 2025 partner
  • Pro app — My Matches

    Agent view: buyer profile (search criteria, budget, surface) on the left, compatible property cards on the right with accept / decline actions.

  • Pro app — Secure messaging

    Inter-pro messaging for discussing matches (buyer ⇄ property pairings) — listing address kept confidential by the platform.

  • Pro app — Credits system

    Pay-per-action credits model: personal balance + shared agency credits, transaction history (unlock agency, accept match).

Skills

Development
PHP · Symfony · Laravel · TypeScript · Node.js · ReactJS · VueJS · Python · GraphQL
Databases
MySQL · MariaDB · Elasticsearch · AWS OpenSearch · Redis
Infrastructure
AWS · CloudFormation · Docker · Nginx · Supervisor · Linux / Bash · CI/CD · Infrastructure as Code · Monitoring & incident resolution
UI
ReactJS · TypeScript · TailwindUI · Figma
Practices
SOLID principles · Low coupling / high cohesion · Event-driven architecture · REST API design · OAuth2 · Webhooks · Unit Testing (PEST) · TDD · Code review & pair programming · Git

Education

  • Professional License — IT Project Management

    IUT Annecy · France · 2015–2016

  • BTS IRIS (Computer Networks Systems)

    IUT Lorgues · France · 2012–2014

Languages

  • French — Native
  • English — Fluent — full professional proficiency

References

Featured publication

Making Biostarks an AI-native at-home biomarker testing company

Romain Dorange — CEO & co-founder, Biostarks — Late Night Convo · 2026-04-12

Public overview of Biostarks' technical architecture: Claude Skills, AI agents (Maurice, Henri, Clyde, Babou family), Elasticsearch authority file and Symfony back-office as agent orchestrator.

Read article →