Full-stack developer

Solid web products, from schema to screen

Eight years building complete applications: Next.js and Node.js architectures, reliable APIs, healthy databases and fast interfaces. When performance or native mobile demands it, I'm just as comfortable stepping outside the JS stack — Rust for critical services, Flutter for iOS and Android. A single point of contact, accountable for the whole chain — and for measurable results in production.

Let's work together See the process

davynana.dev09:41

davynana.dev/expertise/developpeur-full-stack

davynana/

src/

lib/rust-core/

perf.rs

mobile/

app.dart

motion/

journey.tsx

about.ts

about.tsactive tab

// photo: "/assets/davy-nana-dev.jpg"

interface Developer {

focus: string[];

}

const me: Developer = {

focus: ["Rust", "Flutter", "Next.js", "Motion design"],

};

src/lib/rust-core/perf.rs

// Rust: P99 latency ÷4, lower hosting cost

// (far less RAM/CPU than an equivalent Node service)

pub fn process_batch(items: &[Item]) -> Vec<Result> { /* ... */ }

src/mobile/app.dart

// Flutter: a single codebase for iOS and Android

// (same native rendering on both platforms)

class DavyNanaApp extends StatelessWidget {

Widget build(BuildContext ctx) =>

MaterialApp(home: HomeScreen()),

}

src/motion/journey.tsx

// Motion: the site becomes a scripted journey,

// stages that reveal themselves, not a page that just scrolls flat

export function useJourneyStage(step: number) {

return useSpring({ progress: step / STAGES });

}

$ pnpm build

✓ compiled 214 modules in 3.2s

✓ rust-core: release build (0 warnings)

✓ deployed → production

davynana/

src/

lib/rust-core/

perf.rs

mobile/

app.dart

motion/

journey.tsx

about.ts

about.tsactive tab

// photo: "/assets/davy-nana-dev.jpg"

interface Developer {

focus: string[];

}

const me: Developer = {

focus: ["Rust", "Flutter", "Next.js", "Motion design"],

};

src/lib/rust-core/perf.rs

// Rust: P99 latency ÷4, lower hosting cost

// (far less RAM/CPU than an equivalent Node service)

pub fn process_batch(items: &[Item]) -> Vec<Result> { /* ... */ }

src/mobile/app.dart

// Flutter: a single codebase for iOS and Android

// (same native rendering on both platforms)

class DavyNanaApp extends StatelessWidget {

Widget build(BuildContext ctx) =>

MaterialApp(home: HomeScreen()),

}

src/motion/journey.tsx

// Motion: the site becomes a scripted journey,

// stages that reveal themselves, not a page that just scrolls flat

export function useJourneyStage(step: number) {

return useSpring({ progress: step / STAGES });

}

$ pnpm build

✓ compiled 214 modules in 3.2s

✓ rust-core: release build (0 warnings)

✓ deployed → production

Key skills

Application architecture
Clear modules, the right rendering strategy and technical debt kept in check from the first commit.
Proficiency
Proficiency : 92 / 100
APIs & integrations
Documented REST and GraphQL contracts, idempotent webhooks, dependable third-party integrations.
Proficiency
Proficiency : 90 / 100
Data modelling
Evolvable PostgreSQL schemas, safe migrations and queries tuned for real-world load.
Proficiency
Proficiency : 88 / 100
React frontend
Fast, accessible interfaces, from design system to production-proven component.
Proficiency
Proficiency : 95 / 100
Quality, testing & delivery
Targeted unit and end-to-end tests, demanding reviews and CI/CD pipelines that lead to drama-free production releases, no silent regressions.
Proficiency
Proficiency : 86 / 100
Performance & Rust
Critical services rewritten in Rust when latency or hosting cost demand it: markedly fewer server resources than an equivalent Node.js service for comparable throughput.
Proficiency
Proficiency : 82 / 100
Flutter mobile apps
A single codebase for iOS and Android, held to the same quality and polish bar as the web.
Proficiency
Proficiency : 80 / 100
Animation & interface storytelling
Guiding the user through scripted stages rather than laying information flatly down a scrolling page — the signature visible across this very portfolio, notably the /projets scene.
Proficiency
Proficiency : 90 / 100

Tools & technologies

Languages

TypeScript
Kotlin
Rust

Frameworks & libraries

React
Next.js
Spring Boot
Tailwind CSS
Redux Toolkit
Flutter

Services & infrastructure

Supabase
PostgreSQL
Redis
Docker
AWS
Netlify

Related projects

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Role — Full-stack developer

ISR storefront, GraphQL aggregation API and a Redis cache sized for campaign spikes.

Next.js · GraphQL · Redis · Netlify

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Marketplace d'artisans

Role — Back-end developer

Node.js monolith split into services and PostgreSQL geo-search.

Node.js · PostgreSQL · Docker · AWS

View project

A dedicated process

Step 01
Technical scoping
Audit of the existing system, business constraints and architecture choices that are argued, costed and validated together.
Deliverables
Architecture brief · Detailed estimate
1 / 5
Step 02
Foundations
Laying the groundwork: repository, CI/CD, environments, conventions and the first reference screens.
Deliverables
Application foundation · CI/CD pipeline
2 / 5
Step 03
Iterative development
Short batches shipped continuously, regular demos and adjustments without detours.
Deliverables
Tested increments · Regular demos
3 / 5
Step 04
Hardening
Load testing, security review, accessibility and performance budgets honoured before going live.
Deliverables
Test report · Prioritised fixes
4 / 5
Step 05
Launch & handover
Progressive rollout, monitoring, documentation and knowledge transfer to your team.
Deliverables
Application in production · Documentation & handover
5 / 5