Java Full-Stack Engineer - AWS/Azure, Microservices, Banking

Filmon Tesfay

+1-628-***-**** **********@*****.*** Des Moines, lowa LinkedIn

PROFESSIONAL SUMMARY

Java Full-Stack Developer with 6+ years of experience on high-impact teams at Wells Fargo, Infosys, and Liya Enterprise, delivering Java/Spring Boot

+ React/Angular solutions on AWS and Azure: Migrated banking legacy systems to EKS microservices (5M+ transactions, 99.99% uptime, 40% faster responses via Redis); built fintech GraphQL portals boosting throughput 35% with blue-green CI/CD; engineered e-commerce S3/Redshift dashboards cutting delays 30% via K8s amid GDPR/traffic spikes, achieving 98% release yields using Hibernate, Kafka, ELK, OWASP, Jira. TECHNICAL SKILLS

Programming & Frameworks: Java (8/11/17), J2EE/Jakarta EE (Key Expertise), Gradle (Key), Maven (Key), (Spring Boot, Spring MVC, Hibernate), JavaScript (React, Angular, Node.js), Python, TypeScript, HTML5, CSS3, JSON, RESTful APIs, Query Cloud & DevOps: Amazon Web Services (AWS – EC2, S3, Aurora, IAM, AppConfig, Secrets Manager), Azure OpenAI Service (GPT models for conversational AI, prompt engineering), Kubernetes, Docker, Terraform, Jenkins, GitHub Actions, CI/CD Pipelines, Bamboo, EKS, Openshifts Databases & Data Management: Oracle, NoSql, PostgreSQL, MySQL, MS SQL Server, Amazon Aurora, ETL Pipelines, Data Modeling, Software Engineering & Architecture: Microservices Architecture, Distributed Systems, Event-Driven Design, Enterprise Application Development, API Integration, Authentication & Authorization (OAuth2, JWT, Spring Security), SaaS/IaaS UI/UX, SDLC Testing & Quality Assurance: JUnit, Mockito, Selenium, Playwright, API Testing (Postman, Swagger), Test-Driven Development (TDD), Integration & Performance Testing, JMeter

Collaboration & Methodologies: Agile/Scrum, Jira, Confluence, Git/GitHub, Cross-Functional Team Collaboration, Mentoring & Code Reviews EXPERIENCE

Full Stack Developer Wells Fargo – New York, NY Jun 2023 – Present

Led backend development for Wells Fargo's Digital Banking Modernization, building Spring Boot microservices on AWS EKS to migrate legacy mainframes, handling 5M+ daily transactions with 99.99% uptime using Hibernate/JPA and Terraform IaC.

Developed responsive React frontend with Redux and Stripe integration for real-time customer dashboards, slashing response times 40% via Redis caching despite legacy data flakiness in 9-person Agile team.

Optimized ETL pipelines with Airflow/Python for seamless data sync, implementing OAuth2/JWT and ELK logging to achieve zero Dodd- Frank audit findings and 98% first-pass yields.

Collaborated with cross-functional team (4 devs, 2 frontend, 2 QAs, 1 DevOps) using Jira/Confluence, resolving migration challenges through validation scripts and auto-scaling for peak-hour stability.

Drove CI/CD enhancements with GitHub Actions and Docker, cutting deployment cycles 50%; mentored juniors on OWASP security practices for high-availability banking APIs.

Delivered measurable impact by refactoring APIs for sub-100ms responses, boosting mobile integration speed 35% and earning recognition for compliance-ready, scalable enterprise solutions. Full Stack Developer Infosys – Dallas, Tx (Remote) Oct 2021 – May 2023

Developed Azure OpenAI-powered chatbot backend using Spring Boot + Azure Functions for Fortune 500 retail client at Infosys, orchestrating REST/GraphQL APIs with Cognitive Services NLP to automate 70% customer queries (500K+ users) achieving 95% resolution accuracy and $2.4M annual cost savings.

Engineered React/TypeScript conversational UI with multi-turn state management and real-time sentiment analysis, boosting CSAT 25% through personalized GPT responses; integrated Azure Logic Apps/Power Automate for ServiceNow ticket automation and inventory workflows.

Deployed serverless architecture on Azure Kubernetes Service (AKS) with Terraform IaC and Azure DevOps CI/CD pipelines, enabling blue- green deployments that cut release cycles 50% while maintaining 98.5% uptime across 10K+ concurrent sessions.

Implemented RAG architecture with Pinecone vector database and 10TB enterprise knowledge base, eliminating AI hallucinations (85% reduction) and supporting 12-language global operations via Azure Translator integration.

Led security/compliance for GDPR/CCPA with Azure Key Vault, Private Endpoints, and OWASP-secured endpoints in 12-person Agile team; achieved zero PII breaches while mentoring 3 junior developers on Azure AI patterns.

Optimized high-concurrency performance resolving Azure Functions cold starts through Always Ready instances and AKS auto-scaling, delivering p99 latency <300ms; integrated Application Insights/Prometheus for proactive monitoring. Full Stack Developer Liya Enterprise LTD – Asmara, Eritrea Jan 2018 – Oct 2021

Developed full-stack e-commerce dashboard at Liya Enterprise LTD, engineering Spring Boot backend with Hibernate for inventory/supply chain APIs integrated with AWS S3/Redshift data lakes, cutting order delays 30% for Asia-US logistics.

Built responsive React frontend with Chart.js visuals, mobile-first Flexbox design, and real-time supplier webhooks, enabling SMBs to track 500K+ records with sub-100ms query responses despite cross-border traffic variability.

Implemented Docker/Kubernetes orchestration on AWS EKS to handle 3x traffic spikes from Asia ops, using horizontal pod autoscaling and CDN caching, and eliminating downtime during peak import/export seasons.

Enforced GDPR/OWASP compliance via JWT token anonymization, S3 encryption, and Python ETL scripts for data masking; secured logistics platform with zero privacy findings or breaches in 6-person remote team.

Automated ETL workflows with Airflow and SQL optimization on Redshift, streamlining supplier audits and order fulfillment; boosted platform adoption 45% through intuitive, real-time tracking interfaces.

Collaborated Agile-style with 3 full-stack devs (lead role: you), 1 QA (Ravi Kumar), Business Analyst (Sophia Lee), and Founder/PO (Aria Novak), using Jira for sprints and Confluence for traceability.

Resolved unreliable third-party webhook APIs with Resilience4j circuit breakers, exponential backoff retry queues, and fallback dashboards, ensuring 99.9% delivery rates and 2x order volume capacity. EDUCATION

Master of Science in Computer Science

Maharishi International University – Fairfield, IA Jun 2026 Bachelor of Science in Computer Science

Eritrean Institute of Technology – Asmara, Eritrea Aug 2015 AWS Certified Developer - Associate

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