YOHANNES GEBRESLASIE
Silver Spring,MD
Summary
Accomplished Senior Software Engineer with 7 years of experience in developing scalable enterprise systems. Expertise in Java Spring Boot, microservices, and cloud-native platforms, enhancing performance and reliability. Skilled in designing secure APIs, modernizing legacy systems, and delivering solutions using Kafka, Flink, AWS, Docker, Kubernetes, React, and Angular. Focused on AI-driven solutions and workflow orchestration.
Overview
9
9
years of professional experience
Work History
Senior Software Engineer
GEICO
MD, US
06.2025 - Current
- Led development of Apache Flink and Kafka-based streaming pipelines for the MAP-SFMC decoupling, enabling scalable and reliable real-time marketing event processing.
- Built and scaled Spring Boot microservices with GraphQL at the edge and gRPC for internal communication, reducing inter-service latency by 25% and improving API efficiency.
- Improved workflow reliability from 97% to 99.99% using Temporal-based orchestration with retries and state persistence.
- Developed and maintained authentication services with OAuth 2.0, JWT, and API gateways, enhancing security for customer-facing and internal applications.
- Built reusable React components, custom hooks, and state management solutions that improved application maintainability and accelerated feature delivery.
- Led production incident response and reliability initiatives with Splunk, CloudWatch, distributed tracing, and Grafana dashboards, achieving a 30% reduction in Sev-1 incidents year-over-year.
- Directed end-to-end data architecture across Cassandra, PostgreSQL, Kafka, and Redis, optimizing schema design and bulk-write patterns to enhance database throughput by 35%.
- Designed and implemented retrieval-augmented generation (RAG) and multi-step AI orchestration using LangGraph, combining LLM reasoning with deterministic services to deliver accurate, grounded responses and reduce hallucinations.
- Built AI-driven data extraction platform using LLMs and RAG, enabling structured intelligence processing from web-scale data sources.
Senior Software Engineer
Capital One
McLean, US
02.2025 - 06.2025
- Designed and delivered highly scalable, low-latency distributed systems supporting critical financial workflows for millions of customers, ensuring high availability and fault tolerance.
- Influenced system architecture and design decisions, driving improvements in scalability, fault tolerance, and long-term platform modernization in a cloud environment.
- Developed full-stack applications (Java Spring Boot + Angular) prioritizing performance, security, and accessibility (WCAG).
- Collaborated with security and platform teams (Identity Gateway, WAF, Gateway Lite) to implement secure API flows, ensuring compliance with financial regulations, audits, and SOX requirements.
- Maintained data accuracy and consistency across distributed systems, supporting reliable transaction processing and adherence to financial standards.
- Led incident management and 24/7 on-call response, diagnosing and resolving production issues using Splunk, AWS CloudWatch, and distributed tracing, significantly reducing MTTR and improving system stability.
Senior Software Engineer
GSSA Industries
Addis Ababa, Ethiopia
07.2020 - 07.2023
- Played a key role in designing and implementing an event-driven banking payment Gateway system, creating a scalable, efficient, and highly available application for over 40 million users.
- Architected and deployed serverless applications on AWS using Lambda, DynamoDB, and API Gateway, resulting in a 30% reduction in operational costs and improved scalability.
- Migrated Loan Management API to microservices architecture, enhancing API response time by 30% with API Gateway and Application Load Balancer.
- Streamlined data exchange between banking systems with Spring Integration and Kafka, cutting latency by 25% and enabling real-time transaction processing.
- Set up CI/CD pipelines using Jenkins, automating the deployment of critical modules, which reduced manual errors and shortened deployment times by 50%.
- Conducted unit and integration tests using JUnit and Mockito, ensuring high code quality and reliable functionality.
Software Engineer
GSSA Industries
Addis Ababa, Ethiopia
07.2017 - 06.2020
- Utilized Spring technologies, including Hibernate, JPA, and Spring Data JPA, to implement the Data Access Layer (DAO) for efficient database interaction.
- Optimized data retrieval performance within the bank's data layer by refactoring code and SQL queries, resulting in a 50% improvement in data retrieval speed.
- Leveraged multithreading techniques to optimize notification processing and delivery to improve task execution duration and response time.
- Executed thorough testing with JUnit, achieving 90%+ code coverage to ensure robustness and reliability.
- Conducted peer-to-peer code reviews, providing constructive feedback and addressing local bug fixes, leading to 25% reduction in additional costs.
- Engaged in R&D and design discussions, clarified business requirements, and identified functional and technical needs for robust system architecture.
Education
MS - Computer Science
Maharishi International University
Fairfield, Iowa, USABSc - Electrical and Computer Engineering
Mekelle University
Mekelle, EthiopiaSkills
- Spring Boot, Nodejs frameworks
- Microservices development
- API design
- Kafka, Flink processing
- Event-driven architecture
- PostgreSQL, Cassandra management
- AWS, Azure platforms
- Docker, Kubernetes management
- CI/CD pipelines
- Angular, React libraries
- Java, Kotlin, Python expertise
- Prometheus, Grafana monitoring
- Splunk analytics tools
- ELK stack implementation
- System architecture design
- Workflow automation
- Agile project management
- RAG framework application
Timeline
Senior Software Engineer
GEICO
06.2025 - Current
Senior Software Engineer
Capital One
02.2025 - 06.2025
Senior Software Engineer
GSSA Industries
07.2020 - 07.2023
Software Engineer
GSSA Industries
07.2017 - 06.2020
MS - Computer Science
Maharishi International University
BSc - Electrical and Computer Engineering
Mekelle University