01
Product & experience
Useful journeys before screens, followed by a coherent and accessible visual system.
- Discovery
- Figma
- Design system
- Accessibility
Chargement…
Engineering & architecture
Technology choices that remain useful after launch.
Architecture, web, mobile, data, security and operations: a complete technical foundation selected around the product and its real operating context.
Start a projectG/DEV© 2026
ENGINEERING
Architecture · Quality · Resilience
CONAKRY · GUINÉE
8technical layers
FR / ENdocumented delivery
Web + mobileone product vision
Build → runproduction continuity
African engineering team at work01 — Engineering position
A stack is not a shopping list.
The right architecture connects business rules, user conditions, data sensitivity and the team that will operate the product. Frameworks come after those decisions.
- Proven tools before novelty
- Explicit trade-offs before implementation
- Documentation and ownership from day one
02 — Technology ecosystem
The official marks behind our engineering foundation.
A visible, deliberate ecosystem covering product design, web, mobile, data, cloud and production operations. Each mark links to its official website.
1616 technologies, from product design to operations.
01
Product & designFigma
Prototyping and interface systems
02
Full-stack webNext.js
High-performance web applications
03
InterfacesReact
Web and product components
04
EngineeringTypeScript
Typed, maintainable code
05
MobileFlutter
Cross-platform applications
06
MobileDart
Language for Flutter products
07
Mobile platformAndroid
Android mobile experiences
08
Mobile platformApple
iOS and App Store ecosystem
09
BackendNode.js
APIs and business services
10
DataPostgreSQL
Robust relational database
11
Backend & dataSupabase
Postgres, identity and storage
12
PerformanceRedis
Caching and fast processing
13
InfrastructureDocker
Reproducible environments
14
CloudVercel
Web experience deployment
15
AutomationGitHub Actions
Continuous integration and delivery
16
ObservabilitySentry
Production errors and performance
03 — Technology map
Eight layers. One coherent product.
Each layer has a responsibility. The final selection depends on scope and is written into the technical proposal.
02
Web applications
Fast, responsive interfaces structured for search and business applications.
- Next.js
- React
- TypeScript
- PWA
03
Mobile applications
Android and iOS experiences designed around real devices, networks and field use.
- Flutter
- Dart
- React Native
- Android / iOS
04
Backend & APIs
Documented business logic, integration contracts and asynchronous processing.
- Node.js
- REST
- Webhooks
- Queues
05
Data & identity
Relational models, explicit permissions and access limited to what is required.
- PostgreSQL
- Supabase
- RLS
- RBAC
06
Cloud & delivery
Reproducible environments, controlled deployments and prepared rollback paths.
- Docker
- Vercel
- CI/CD
- Environments
07
African integrations
Payments, mobile money, SMS, OTP and communications connected with recovery and logging.
- Mobile money
- SMS / OTP
- Partner APIs
08
Quality & operations
Testing, monitoring, backups and documentation to maintain the product after launch.
- Automated tests
- Monitoring
- Backups
- Audit logs
04 — Reference architecture
Readable from interface to operations.
This map is a reference, not a mandatory template. It makes boundaries, data paths and operating responsibilities visible.
EVERY PROJECT MAKES THESE EXPLICIT
A technical contract the whole team can understand.
- System boundaries and ownership
- Sensitive data and access rules
- Failure, recovery and backup paths
- Deployment and operating instructions
05 — Decision framework
We choose from constraints, not trends.
Six questions prevent a popular technology from becoming the wrong operational decision.
01
Usage context
Phone, browser, field work, weak connectivity or internal use?
02
Team & ownership
Who operates, maintains and evolves the product after delivery?
03
Data
Which data is sensitive, shared, audited or retained?
04
Risk & security
What would be the impact of an error, leak or outage?
05
Performance
Which volumes, devices, countries and response times must actually be served?
06
Evolution
Which capabilities are certain now, and which remain hypotheses?
Production ready means more than deployed.
The exact controls vary with criticality. These are the areas reviewed before handover.
Controlled code
Strict typing, conventions, review and static analysis adapted to the project.
Verified experience
Responsive behavior, keyboard navigation, error states and priority devices tested.
Protected access
Server validation, permissions, secrets, logs and private storage according to risk.
Observable performance
Images, JavaScript, caching and Core Web Vitals monitored on critical journeys.
Reproducible delivery
Separated environments, automated checks and a documented deployment process.
Usable handover
Source code, access, architecture and useful operating guidance handed to the authorized team.
07 — Engineering delivery
From uncertainty to an observable product.
Every stage closes a specific risk before the next investment is made.
- 01
Discovery
Constraints, users, risks and expected outcome.
- 02
Architecture
Modules, data, integrations and structural decisions.
- 03
Prototype
Journeys and components validated before heavy implementation.
- 04
Build
Visible increments, technical reviews and regular demonstrations.
- 05
Verification
Functional, security, performance and business acceptance tests.
- 06
Production
Deployment, observation, documentation and handover.
08 — Official resources
Go beyond logos. Read the foundations.
A curated starting point for technical teams and decision-makers who want to verify the standards behind our choices.
01
Official documentationNext.js App Router
Full-stack web architecture
02
Official guideTypeScript Handbook
Typing and maintainability
03
Official learning pathFlutter Learn
Mobile applications
04
Official referencePostgreSQL Documentation
Relational data
05
Official documentationSupabase Database
Postgres, security and operations
06
Official guidesDocker Guides
Containers and delivery
07
Open standardOWASP ASVS
Application security controls
08
web.dev referenceCore Web Vitals
Real user performance
Technical questions before commitment.
01Do you always use the same stack?
No. We retain a proven foundation, then adapt mobile, backend, hosting and integrations to the product, team and risk level.
02Does the client receive the source code?
Yes, according to the contract. We also organize ownership of accounts, access and third-party services to avoid unnecessary dependency.
03Can you integrate local services?
Yes, when the provider offers an API, documentation and ideally a test environment. We also design useful failure, recovery and logging paths.
04How do you approach security?
Through risk: data, roles, exposure, impact and obligations. Controls are defined in scope; no technology makes a product absolutely secure.
05Can the product work with weak connectivity?
We assess screen weight, caching, retries, synchronization and, when justified, offline or PWA modes.
06Can another team take over the product?
That is the goal of a readable foundation: structured repository, documented variables, data model, deployment process and authorized access handover.
Architecture before implementation
Let us design the right technical foundation for your product.
We clarify the context, risks and useful first version before recommending a stack.