Understand before building.
The users, their constraints, what gets in the way. Business needs give technical decisions their direction.
Rayan
Tsolefack.
The interface. The services.
And everything in between.
Six years designing resilient architectures, leading complex web platforms and scaling high-traffic e-commerce, SaaS and Fintech systems.
LED BY CURIOSITY.
CMRCAN
Two continents.
The same drive to build.
AT A GLANCE
What I bring to high-impact projects.
Technical leadership, software architecture and full-stack engineering across established platforms and greenfield products, from business rules to production infrastructure.
SymfonyLaravelTypeScriptReactAngularJavaASP.NET CorePostgreSQLPimcore
IMPACT & SCALE
A few indicators of scope.
+50 000
SKU references orchestrated
Pimcore PIM / Pneus Ratté & TireDirect
2
E-commerce platforms
Nationwide continuous operation
7
Countries connected
Transfers & Mobile Money (Cosna Afrique)
4
Engineers mentored
Tech lead engineering (PILINK)
01 / THE WORKBehind every screen,
Behind every screen,
a real problem.
From high-traffic commerce platforms to cross-border financial transfer and SaaS products. The context, the decisions and the delivery.
PNEUS RATTÉ & TIREDIRECT / PIMCORE MULTI-SITE
Professional work01 / 06
CommercePneus Ratté & TireDirect
Technical leadership and engineering for two major Québec commerce platforms: product data (PIM), instant search and Shopify integrations.
PimcoreSymfonyShopifyAlgoliaTypeScript
Inside the projectALSO ALONG THE WAY
Different domains. Different constraints.
02 / THE APPROACHThe details matter.
The details matter.
So does the whole.
Connect what needs to work together.
An interface, an API, data and external services. I care as much about the connections between the parts as the parts themselves.
Think about what comes next.
Explicit rules, verified changes and documented decisions. So the product can keep evolving.
03 / THE JOURNEYAlways
Always
moving forward.
From Cameroon to Québec. From leading teams at PILINK to web leadership at Pneus Ratté & TireDirect. And today, continuing with an AI master’s.
Explore my experience04 / ENDORSEMENTS & NETWORK
Trust from peers, engineering teams and partners.
I strongly recommend Rayan TSOLEFACK. He is hard working and has great soft skills. His experience make him a great colleague to work with. He clearly knows how to work in a team and is a good self-taught.
01 / 04
05 / ARCHITECTURE NOTES & THOUGHTS
Field practices, system design patterns and engineering decisions.
Architecture / E-Commerce3 min
Synchronizing 50,000 Pimcore SKUs to Shopify without production disruption
How to orchestrate large tire and wheel catalogs between a Pimcore PIM and the Shopify API while guaranteeing price integrity, variant consistency and rate-limiting resilience.
- Decoupled asynchronous Symfony workers with queue management and error recovery.
- Delta hashing to only transmit modified attributes to the Shopify API.
- Fine-grained Shopify GraphQL quota handling and real-time execution reporting.
Fintech / Sécurité4 min
Idempotency and reconciliation in cross-border Mobile Money gateways
Designing strict transactional state machines to eliminate double-charges and reconcile financial flows amid unpredictable telecom timeouts.
- Cryptographic idempotency keys and transactional locking per account.
- Exponential backoff webhook dispatcher with HMAC signatures on every request.
- Automated end-of-day reconciliation mechanism to certify account balances.