Software Architect
Leul Melkamu
System Design • Distributed Platforms • Event-Driven Architecture
Software Architect with 4+ years designing production systems from first principles — defining service boundaries, choosing consistency models, and encoding business rules as structural constraints rather than application logic.
Selected Work
Projects
Systems designed around structural constraints — fault-tolerant topologies, auditable workflows, and service boundaries that encode the domain, not just the data.
Enterprise PlatformProduction
ProcurePro
Cloud-native multi-tenant procurement platform automating the full procurement lifecycle
Spring BootSpring Cloud GatewayPostgreSQLApache KafkaRedis+3
Services
10 Microservices
Model
Multi-Tenant SaaS
Stack
Spring + Next.js
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DevOps IntelligenceProduction
AI-Synapse
AI-powered DevOps intelligence platform for automated issue detection and one-click PR fixes
Spring BootFastAPIApache KafkaNext.jsGitHub API+2
AI
Async Inference
Fix
One-Click PR
Stack
Spring + FastAPI
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Mobile + Backend
SafeStatusNotifier
Real-time status sharing app for families and close contacts
Spring BootGraphQLPostgreSQLFlutter
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EdTech Platform
Interview Trainer Platform
AI-powered interview practice platform with video calls and feedback
Spring BootLiveKitWebSocketPostgreSQL
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Fleet Management
Transport Allocation System
Fleet management and vehicle dispatch platform for logistics
Spring BootMySQLRedisFlutter
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Consumer App
CompareWise
Product comparison app with AI recommendations and price tracking
Spring BootPostgreSQLRedisFlutter
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E-commerce
Cosmetics E-commerce
Online beauty store with product catalog, cart, and secure checkout
ReactNode.jsExpressMongoDB
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Expertise
Technical Skills
Systems & Architecture
MicroservicesMulti-Tenant SaaSEvent-Driven ArchitectureDistributed SystemsSystem DesignAPI Design
Infrastructure
DockerKubernetesSpring Cloud GatewayResilience4jCI/CDAWS
Messaging
Apache KafkaEvent SourcingCQRSRabbitMQStream Processing
Data & Storage
PostgreSQLMongoDBRedisHibernateDatabase-per-ServiceOptimistic Locking
AI & Integration
FastAPIGemini APIGitHub APIWebSocketGraphQLOAuth2 / JWT
Languages
JavaSpring BootPythonNode.jsTypeScriptGo
Career
Experience
12/2024 – 08/2025
Addis Financials
Backend Developer
Remote
- Spearheaded the V2 Platform Evolution: Led the architectural migration of the core financial engine from a monolithic v1 to a high-availability Microservices architecture using Spring Boot, resulting in a 40% reduction in deployment lead time and vastly improved fault isolation.
- Database & Query Optimization: Overhauled the persistence layer by implementing PostgreSQL indexing strategies and a Redis-based read-aside caching pattern, which slashed primary database CPU load by 30% and achieved sub-100ms latency for critical financial reporting endpoints.
- Event-Driven Resilience: Engineered an asynchronous communication backbone using Apache Kafka, enabling real-time transaction synchronization across distributed services while ensuring strict eventual consistency for ledger updates.
- Secure API Orchestration: Designed and documented security-hardened RESTful APIs (OAuth2/JWT) using OpenAPI/Swagger, which streamlined 3rd-party integrations and reduced frontend-backend coordination overhead by two weeks per development cycle.
Spring BootApache KafkaPostgreSQLRedisOAuth2 / JWTDocker
07/2024 – 11/2024
360GROUND
Backend Developer
Addis Ababa
- Architected a Scalable Modular Monolith: Designed a robust backend using Express.js, enforcing strict separation of concerns and modularity to handle high-concurrency traffic while maintaining a clean, maintainable codebase.
- Concurrency & Data Integrity: Engineered high-throughput API endpoints utilizing Redis-based distributed locking and session management, successfully eliminating race conditions during peak transaction periods.
- Performance Engineering: Conducted deep-dive Node.js event-loop profiling and debugging to identify and resolve blocking operations, achieving a 99.9% uptime standard and optimizing resource utilization across the stack.
Node.jsExpressRedisPostgreSQL
01/2024 – 11/2024
Freelance Projects
Fullstack Developer
Online
- Architected bespoke end-to-end solutions for diverse clients, focusing on scalable API infrastructures and cloud-native deployments.
- Developed real-time data processing engines utilizing FastAPI and Node.js, tailored for high-performance requirements and low-latency data streaming.
- Containerized legacy infrastructures using Docker, simplifying environment parity and significantly reducing deployment issues.
- Consulted on Cloud Strategy: Advised clients on AWS resource optimization (IAM, VPC, S3) to balance high availability with cost-efficiency.
FastAPINode.jsDockerAWSPostgreSQL
02/2023 – 11/2023
LDDA Technologies
Backend Engineer
Addis Ababa
- Developed a secure EdTech backend using Node.js/Express, managing complex user hierarchies and role-based access control (RBAC).
- Engineered a custom video streaming module, implementing chunked uploads and optimized retrieval paths for low-bandwidth environments.
- Database Optimization: Refined PostgreSQL indexing and query execution plans, cutting data retrieval times for large-scale enrollment reports by 50%.
- Integrated secure payment gateways and analytics endpoints, providing real-time financial tracking for platform administrators.
Node.jsExpressPostgreSQLJWTFirebase
05/2022 – 12/2022
Alter Digital Solutions
Fullstack Engineer
Addis Ababa
- Enterprise Fullstack Development: Engineered modular, end-to-end web applications leveraging Spring Boot for robust backend logic and React.js for dynamic, state-driven user interfaces.
- Performance Engineering: Identified and resolved critical performance bottlenecks by optimizing Hibernate/JPA queries and implementing efficient data-transfer objects (DTOs), reducing payload sizes and server-side processing time.
- Scalable API Design: Architected and documented RESTful APIs following industry best practices, ensuring high maintainability and seamless integration between the Java-based micro-modules and the frontend.
- System Reliability & Debugging: Enhanced application stability by implementing structured error-handling frameworks and conducting deep-dive debugging of production services to maintain high uptime.
Spring BootReactPostgreSQLHibernateREST API
02/2022 – 05/2022
Efuye Gela
Fullstack Developer
Addis Ababa
- End-to-End Engine Development: Engineered the core logic for 'EGA', a high-performance e-commerce platform for game rentals, taking the product from initial architectural design to successful production launch.
- Full-Stack Optimization: Leveraged Next.js (SSR/ISR) and Tailwind CSS to build a lightning-fast, SEO-optimized frontend, achieving high Core Web Vitals scores and a seamless user experience.
- Type-Safe Data Modeling: Architected a scalable schema using Prisma ORM and MongoDB, ensuring data integrity across complex rental cycles, user inventories, and transaction logs.
- FinTech Integration: Developed a secure payment bridge for Telebirr, handling encrypted callbacks and transaction verification to facilitate local-compliant digital payments.
Next.jsTypeScriptMongoDBPrismaTailwind CSS
Education
Academic Background
Addis Ababa University
Computer Science
Addis Ababa
Contact
Get in Touch
Available for software architecture, platform design, and distributed systems consulting.