Jeremiah Lena
Dublin, Ireland | +353857465550 | jeremiahlena13@gmail.com | GitHub | LinkedIn
SUMMARY
Software Development Engineer with experience building production systems across cloud networking, fintech products, and developer tooling. Strong ownership across technical design, implementation, testing, on-call operations, and reliability improvements.
SKILLS
- Languages: Rust, Go, TypeScript, JavaScript, Java, Python, HTML, CSS
- Frameworks: React, Next.js, React Native, Django
- Systems: AWS, TCP, UDP, Compiler Design
- Data and Tools: PostgreSQL, Redis, Docker, Git
PROFESSIONAL EXPERIENCE
Software Development Engineer, Level IV | Amazon Web Services (AWS)
Dublin, Ireland | Dec 2025 - Present
- Build networking services that collect operational metrics from AWS devices worldwide, using SNMP and Geyser (a proprietary protocol built on HTTP and UDP), alongside TCP and UDP integrations.
- Own the JTI collector service for Junos devices, driving feature delivery, production bug fixes, and reliability improvements for high-volume telemetry ingestion.
- Design end-to-end solutions from technical design through implementation, testing, deployment, and operational readiness.
- Lead operational excellence through on-call ownership, deployment tracking, pipeline monitoring, and incident response, improving incident handling speed and release confidence.
Frontend Engineer | Moniepoint
Lagos, Nigeria | Sep 2025 - Dec 2025
- Contributed to Moniebook, an inventory management product for businesses with Moniepoint accounts, with primary ownership in the accounting module.
- Built production UI workflows and backend integrations in collaboration with designers and backend engineers.
- Increased accounting module test coverage from 70% to 95% by adding targeted unit and integration tests for critical accounting workflows.
- Reduced UI defect rate by 35% in the accounting module by hardening form validation, state handling, memoization and edge-case handling.
- Built 3 reusable components and contributed to the improvement of at least 8 more components in the shared frontend library, adopted by 20 engineers across 5 teams to improve delivery speed and UI consistency.
Software Engineer (Frontend) | ITEX Integrated Services
Lagos, Nigeria | Jul 2023 - Aug 2024
- Integrated Jitsi Meet into the merchant support platform, reducing issue resolution time by 20%.
- Led frontend delivery for TrackMoney rebuild using TypeScript, React, and Next.js, and rewrote core logic to achieve a 300% load-time improvement.
- Built a React SDK for ITEXPay to simplify merchant payment integration.
- Improved ITEXPay website performance and responsiveness, contributing to a 38% increase in user engagement.
- Contributed to migration of ITEXPay merchant and admin apps from Angular to React, helping drive an 80% decrease in user complaints and bug reports.
SELECTED PROJECTS
- Built a markdown compiler and templating engine with an end-to-end lexer, parser, AST, and HTML rendering pipeline.
- Implemented embedded expression and control-flow support (
{{ ... }}, {% if %}, {% for %}, {% fn %}, and import aliases).
- Designed a parselet-driven Pratt parser with operator precedence handling and chained array, object, and function access support.
- Built a platform for writing, running, and sharing code snippets across multiple languages (Rust, C++, Python, Javascript, Typescript and Go).
- Implemented isolated Docker-based execution while adding guardrails for preventing malicious code execution, including limits to resource usage and execution time.
- Added Redis-backed caching and backend middleware for logging, CORS, and JWT-based authentication.
- Built and maintained 25 scrapers that collected approximately 74,000 news articles.
- Used Python asyncio to run scraping jobs concurrently, reducing runtime from about 4 minutes to 20 seconds.
- Implemented robust alerting and fail-safe workflows so single-scraper failures did not block end-to-end data collection.
- Built the entire mobile application using React Native and TypeScript and integrated non-obstructive data collection and usage metrics from users.
EDUCATION
University of Lagos, Nigeria | Nov 2019 - Feb 2025
- Relevant coursework: Introductory Computer Science, Programming in C, Linear Algebra