01
Payment Integration
Integrate PSPs, mobile money and payment rails with idempotency, webhooks, retries and reliable transaction state.
- PSP
- Mobile Money
- Webhooks
- Multi-rail
FinTech Engineering & Consulting
We engineer reliable financial systems.
You focus on growth.
Manarix Solutions helps fintechs, PSPs and digital platforms integrate payments, modernize production backends and build greenfield payment infrastructure.
- Payment Integration
- Backend Modernization
- Greenfield Platforms
- UEMOA · Francophone Africa
- 45-min discovery · 48h proposal
Payment Infrastructure Monitor
All Systems Operational
Mobile Money / PSPs
Payment APIs
Payment Orchestration
Ledger / Reconciliation
Settlement / Reconciliation
99.92%
Transaction Success
2.48M
Transactions
120ms
Avg. Latency
Technologies we ship in production
APIsKafkaPostgreSQLRedisDockerKubernetesAWSOpenTelemetryJavaNode.jsAPIsKafkaPostgreSQLRedisDockerKubernetesAWSOpenTelemetryJavaNode.js
What we solve
Complex financial systems require more than code.
We combine software engineering, architecture and financial-domain expertise to solve the problems that sit between product, technology and infrastructure.
02
Backend Modernization
Modernize legacy backends in production without a big bang — stack upgrades, APIs, events and observability.
- Legacy
- APIs
- Event-driven
- Cloud-native
03
Greenfield Platforms
Build payment infrastructure from scratch: orchestration, ledger, multi-rail collection and production-ready architecture.
- Orchestration
- Ledger
- Multi-rail
- Go-live
Why Manarix
Engineering depth. Business context. Financial expertise.
01
Domain Expertise
- Payments
- Mobile Money
- Reconciliation
- Settlement
- Greenfield builds
- Platform launches
02
Engineering Excellence
- Backend platforms & APIs
- Distributed systems
- Event-driven architecture
- Java / Spring (enterprise depth)
- Kafka & message queues
- Cloud-native systems
- Observability
03
Business Impact
- Reliability
- Scalability
- Faster delivery
- Lower technical risk
- Maintainability
- Production readiness
Services
Three engagement types. One standard: production-grade.
Payment integration, backend modernization and greenfield builds — scoped for impact. A 45-minute technical discovery, a written proposal within 48 hours.
01
Payment Architecture Audit
From payment request to settlement: API, provider, webhook, transaction, ledger, reconciliation. You get an Architecture Assessment, a Risk Map, and a Technical Roadmap — plus a Payment Reliability Score.
- Reliability score by domain, out of 100
- Duplicate payments, replayed webhooks, inconsistent states
- Quantified loss and double-charge risks
- Remediation plan prioritized in days
02
Payment Integration Sprint
Integrate a PSP, mobile-money rail, or payment rail into an existing platform: architecture, APIs, webhooks, idempotency, retries, transaction state machine, reconciliation, monitoring, tests, documentation.
- Rail integration without breaking what works
- Idempotent webhooks, retries, and state machine
- Reconciliation, monitoring, tests, and handover
03
Backend Modernization Sprint
Modernize legacy backend systems without breaking production: stack upgrades, modularization, API redesign, event pipelines, observability, resilience and cloud readiness. Deep JVM/Spring expertise — and pragmatic work on Node, Python and polyglot architectures when that is what production requires. Not a big bang. A path your teams can follow.
- Stack modernization (JVM, Node, runtime & framework upgrades)
- Modularization and API redesign
- Resilience, tests, CI/CD
- Observability before and after cutover
04
Multi-rail payment integration
Wave, Orange Money, Free Money, card, bank transfer — wired cleanly into a single architecture.
- Idempotent webhooks that survive replay
- State machine with automatic recovery on failure
- Logging traceable transaction by transaction
- Test environment, documentation, and handover
A written proposal within 48 hours, after a 45-minute technical discovery.
Not sure which engagement fits?
Start with a technical discovery. We'll map your architecture and recommend the right scope.
Case studies
Engineering challenges. Measurable outcomes.
Representative engagements — details anonymized where required by client confidentiality.
01
Payment Integration Platform
Challenge
Multiple payment providers with inconsistent APIs and transaction states.
Approach
Unified integration layer with idempotency, webhooks, retries and transaction state management.
Outcome
Simplified payment integration and improved operational visibility.
Technologies
- Kafka
- PostgreSQL
- REST APIs
- Docker
02
Greenfield Payment Platform
Challenge
Launch multi-rail collection for a marketplace with no existing payment infrastructure.
Approach
Design orchestration, ledger and integration layer from scratch — idempotency, webhooks and observability built in from day one.
Outcome
Production-ready payment stack delivered incrementally, ready to scale with volume.
Technologies
- Kafka
- PostgreSQL
- REST APIs
- Kubernetes
Facing a similar challenge?
Payment integration, legacy modernization, or a greenfield build — let's diagnose your specific situation.
Technical authority
Built for systems where failure is expensive.
Idempotency
Prevent duplicate financial operations.
Resilience
Design for retries, timeouts and partial failures.
Observability
Know what is happening across distributed systems.
Consistency
Protect transaction integrity across services.
Security
Build security into the architecture.
Reconciliation
Make financial discrepancies visible and actionable.
Production systems deserve production-grade architecture.
Whether you're pre-launch or scaling, a 30-minute conversation can clarify your highest-risk gaps.
Approach
A consulting process built for production systems.
From discovery to scale — structured, transparent, and designed for financial infrastructure.
01
Discover
Understand your business, architecture and technical constraints.
02
Diagnose
Identify bottlenecks, risks and opportunities.
03
Engineer
Design and implement the right solution.
04
Scale
Improve reliability, observability and long-term maintainability.
6+ Years
Engineering Experience
Enterprise
Payment & FinTech Platforms
APIs · Events · Cloud
Backend Engineering Stack
Africa → Global
Delivery Perspective
Consulting and engineering expertise remain our primary positioning.
Looking for senior backend expertise?
Need a Senior Backend Engineer, Software Architect or Payments specialist for your next initiative? Let's discuss the technical challenge, team context and engagement model.
Insights
What is verifiable today
One internal product delivered. Publications to come. No invented client logos.
Open source
Coming soonA documented library will be published on the firm's GitHub — an integration client or webhook signature verifier.
GitHub →Technical publications
UpcomingTechnical notes to publish under our names, on the problems we address in engagements.
- 01
Payment webhook idempotency: why your customers get charged twice
- 02
Why a payment timeout must never automatically trigger a new payment
- 03
Multi-rail Wave / Orange Money reconciliation: a data model that holds
- 04
Is your API actually observable?
- 05
How to modernize Spring Boot without breaking production
Operating model
Two engagements at a time. Zero handoffs.
In payment systems, the expensive failures come from lost context — the person who understood the constraint is rarely the person who ships the code. We cap ourselves at two engagements so that gap never opens: the engineer who maps your architecture is the one who implements it.
What this guarantees
Named senior engineers, from the first call to go-live. The person who maps your architecture writes the code, owns the deployment and answers after launch. No sales layer, no account manager, no junior assigned by default.
Where we are not the right fit
Two engagements in parallel, no more. If you need a ten-person team staffed next week, a 24/7 on-call rotation, or a vendor to answer a 200-page RFP, we are not it — and you will hear that on the first call, not three weeks in.
Commitments written into every contract
Milestone payments
You pay the next stage only after the previous one is delivered and accepted.
The code is yours
Entirely, from day one, on your own repository.
No lock-in
No dependency on a proprietary Manarix tool. Another vendor must be able to take over, and our documentation is written for that.
60-day fix warranty
After go-live, with no extra invoice.
Formally incorporated
NINEA, RCCM, service contract, compliant invoices.
FAQ
Frequently asked questions
Capacity, partnerships, pricing, references, and timing.
Why trust a recent firm with a critical system?
Because the liability is contractual and verifiable: milestone payments, code on your repository from day one, a 60-day fix warranty, and an initial audit refunded if it teaches you nothing. A short engagement lets you judge the work before widening the scope.
There are only two of you. What if one of you is unavailable?
All of our code lives on your repository, documented so a third party can take over. We create no dependency on our presence — that is a design rule, not a sales promise. We also cap ourselves at two concurrent projects so we are never overcommitted.
We are an agency / SI. Do you subcontract?
Yes — on collection only. You keep the prime contract and the relationship. We come in as the named specialist: audit, rails, webhooks, reconciliation. Report under your name or ours. We do not take the rest of the project, and we do not contact your client to capture the account.
Can you give us client references?
No client references to display yet. What we can show: the architecture of Xaalis, a financial product designed and built in-house, upcoming papers, and public laboratories in progress. A short technical review of your platform is another way to judge the work itself.
Why are your prices not listed?
Because the amount depends on criticality, the state of what you already have, and the volume you process. The same audit is not priced the same for an early-stage platform and for a high-volume aggregator. After a 45-minute scoping call, you receive a priced proposal within 48 hours — a firm figure, not a vague range.
Do you work with companies outside Senegal?
Yes. Dakar first, then WAEMU, and remotely beyond. Payment and FinTech platforms are naturally regional.
How soon can you start?
Our next availability window is September 2026. An audit can typically start within two weeks.
Technical Discovery
Let's build the infrastructure behind your next stage of growth.
Whether you're integrating payments, modernizing a legacy backend or building a greenfield platform, start with a technical conversation.
30–45 min · Technical discussion · No commitment