A Senior Backend And Full-Stack Software Engineer.
I’m Abdurrahman Sale, a backend and full-stack engineer, Over the past 6+ years, I’ve worked across telecom, fintech, and enterprise software—delivering production-grade systems used by millions of users and thousands of businesses.
SELECT * FROM transactions WHERE merchant_id = $1redis.getOrSet(`m:$123:tx`, () => fetchIndexed())Maintained bulletproof payment uptime across high-volume merchant networks.
Modernized legacy systems across Trilogy's global enterprise software portfolio.
Scaled core telecom platforms at Airtel driving 5x user growth without bottlenecks.
Optimized SQL query performance and backend execution speed at Paystack/Stripe.
My work experince across multiple domains
Select a domain to inspect architectural performance & tech stack design.
Fintech Payment Engine (Paystack / Stripe Ecosystem)
Optimized payment routing pipelines and checkout workflows. Reduced end-to-end API latency by 35% while increasing successful transaction completion rates across thousands of active merchants.
About My Experience And Impact.
Architecting high-throughput distributed systems, optimizing legacy technical debt, and driving measurable enterprise growth.
Abdurrahman Sale
Senior Systems & Backend Engineer
Executive Overview
I am Abdurrahman Sale, a Senior Backend & Systems Developer with 6+ years of experience engineering high-availability payment gateways, telecom platforms, and enterprise software suites.
Modernized legacy codebases across 100+ enterprise SaaS products. Refactored high-latency database queries, overhauled distributed microservices, and reduced critical system downtime for global corporate clients.
Engineered payment settlement and API integration pipelines processing millions in daily volume. Reduced latency by 35% while enforcing strict PCI-DSS compliance and maintaining 99.99% system availability.
Scaled backend services powering My Airtel App, KYC Agile, and DealCode. Directly contributed to expanding the regional subscriber base5× from 5,000 to 25,000 active businesses without infrastructure degradation.
Founded and built InfoBeatLive Schools & Analytics from ground up—delivering a full-stack SaaS platform serving 57 active institutional clients with automated report sheet generation, analytics telemetry, and subscription billing.
Services & Expertise.
Technical capabilities I bring to teams and projects.
Backend Development
Architecting and building robust, scalable APIs and microservices handling high-volume transactions.
Full Stack Development
End-to-end application development using modern frameworks like Next.js and React.
DevOps & Cloud
Automating deployments, configuring CI/CD pipelines, and managing infrastructure on AWS & GCP.
System Architecture
Designing scalable, fault-tolerant distributed systems for enterprise environments.
Web Security
Implementing industry-standard security practices to protect data and prevent vulnerabilities.
Mobile App APIs
Developing reliable backend infrastructure to power responsive mobile applications.
My Work Experience & Impact.
I have experience working across multiple domains on enterprise-grade systems, including Airtel, a leading telecom provider operating in 60+ countries; Paystack, a Stripe-backed fintech company and one of the largest in Africa; and Trilogy, a global software company managing 100+ enterprise products across diverse industries.
Proven Results Across Distributed Workloads
Senior Backend & Systems Engineer
- Architected & refactored distributed backend microservices across a portfolio of 100+ enterprise SaaS products, eliminating critical bottlenecks and legacy technical debt.
- Engineered high-throughput asynchronous job processing queues (Redis Pub/Sub & RabbitMQ), accelerating core transaction processing workflows by 30%+.
- Implemented comprehensive distributed tracing, telemetry (OpenTelemetry/Prometheus), and fault-tolerant fallback mechanisms, cutting critical production incidents by 45%.
- Standardized containerized orchestration (Docker/GCP) and automated CI/CD deployment pipelines to ensure zero-downtime multi-region deployments.
Senior Backend Engineer (Fintech & Payments)
- Engineered core payment settlement and API processing infrastructure handling millions in daily transaction volume across thousands of merchants with guaranteed 99.99% uptime.
- Optimized PostgreSQL relational schemas, execution query plans, and Redis caching strategies, slashing checkout API response latency by 35% under peak traffic.
- Built PCI-DSS compliant cryptographic tokenization vaults and HMAC request verification middleware, eliminating security vulnerabilities and reducing transaction fraud risks.
- Implemented automated retry logic, circuit breakers, and fault-tolerant bank provider fallback mechanisms to boost overall merchant checkout success rates.
Systems Architect & Backend Engineer
- Architected and deployed distributed backend services powering internal telecom platforms (My Airtel App, KYC Agile, and DealCode) across regional operations.
- Designed high-performance database indexing and partitioning strategies across PostgreSQL and DynamoDB, reducing database query overhead by 35%.
- Engineered scalable RESTful API endpoints and real-time streaming pipelines, enabling seamless 5× user base expansion (5,000 to 25,000 active subscribers) without degradation.
- Streamlined internal operational workflows through automated API integrations, significantly reducing manual provisioning overhead for regional teams.
Founder Of InfoBeatLive Platforms.
As a founder, I have built and launched over 11 software startups across different domains. While many did not succeed—8 generated no revenue (with 3 gaining no users and 5 acquiring users without monetization)—these experiences strengthened my product, growth, and execution skills. Notably, 3 ventures generated several thousand dollars in revenue, and one became profitable, achieving over $17,100 in total revenue and $15,000+ in profit from approximately 57 paying customers.
InfoBeatLive Plartforms Portfolio
Engineered with multi-tenant isolation, automated event queues, and low-latency API architecture.
InfoBeatLive Analytics
Autonomous Business Intelligence & AI Insights Telemetry Platform
Engineered an AI-driven enterprise analytics engine converting raw transactional telemetry (ARR, Churn, CAC, LTV, Runway) into dynamic, context-aware business trajectory recommendations using LLM pipelines.
InfoBeatLive Schools
Multi-Tenant Enterprise Portal for K-12 Institutional Management
Architected a multi-tenant SaaS ecosystem serving 57+ educational institutions in West Africa. Built for high-density transactional loads, automated report card compilation, automated billing gateways, and real-time attendance streaming.
InfoBeatLive Learn
Scalable Interactive E-Learning & Distributed WebRTC Video Infrastructure
Designed a multi-tiered online classroom engine supporting WebRTC peer mesh video streaming, automated PDF certificate signing, dynamic course progression, and low-latency interactive chat channels.
Education & Certifications.
Academic excellence and industry-recognized technical certifications.
Google Cloud Certified Professional Cloud Architect
Google Cloud Platform (GCP), Google Distributed Cloud (GDC) and +3 skills
AWS Certified Solutions Architect
Amazon EC2, Amazon S3 and +9 skills
Master's Degree, Computer Science
Back-End Web Development, Software Development and +8 skills
Bachelor's degree, Computer Science
Data Structures, Algorithms and +8 skills
Courses Completed.
Specializations and professional development courses completed.
Technical Arsenal.
A deep, production-grade stack spanning backend systems, distributed architecture, and cloud-native engineering.
JavaScript
Core programming languages used for building production systems.
TypeScript
Core programming languages used for building production systems.
Node.js
Building scalable APIs, services, and high-performance systems.
Express.js
Building scalable APIs, services, and high-performance systems.
Python
Core programming languages used for building production systems.
Django
Building scalable APIs, services, and high-performance systems.
Flask
Building scalable APIs, services, and high-performance systems.
PostgreSQL
Designing efficient data models and optimizing queries at scale.
MongoDB
Designing efficient data models and optimizing queries at scale.
SQL
Designing efficient data models and optimizing queries at scale.
NoSQL
Designing efficient data models and optimizing queries at scale.
AWS
Deploying and managing distributed systems in cloud environments.
GCP
Deploying and managing distributed systems in cloud environments.
Docker
Deploying and managing distributed systems in cloud environments.
System design
Designing systems for scalability, reliability, and performance.
DSA
Designing systems for scalability, reliability, and performance.
React
Creating modern, performant, and user-centric interfaces.
Next.js
Creating modern, performant, and user-centric interfaces.
React Native
Creating modern, performant, and user-centric interfaces.
Cloud Computing
Deploying and managing distributed systems in cloud environments.
Backend Development
Building scalable APIs, services, and high-performance systems.
Full Stack Development
Designing systems for scalability, reliability, and performance.
Web Security
Implementing secure systems with strong data protection practices.
Scalability
Designing systems for scalability, reliability, and performance.