Senior Full-Stack Engineer and Tech Lead

HOWARD JOHNSON

Senior Full Stack Developer

*****************@*****.*** https://www.linkedin.com/in/howard-johnson-888a79392/ West Java, Indonesia PROFESSIONAL SUMMARY

Seasoned Senior Full-Stack Developer with 7+ years of experience architecting and delivering mission-critical, cloud-native platforms that power millions of users and drive measurable business impact.

Expert in modern full-stack ecosystems: React/Next.js, Vue/Nuxt, TypeScript, Node.js, Go, Java (Spring Boot), Python/FastAPI, and event-driven microservices orchestrated on AWS (EKS, Lambda, DynamoDB, RDS Aurora). Proven track record of leading end- to-end migrations from legacy monoliths to scalable, serverless-first architectures while slashing infrastructure costs by up to 40%.

Deep production experience integrating AI/ML capabilities — recommendation engines, predictive analytics, RAG pipelines, and LLM-powered features — using PyTorch, TensorFlow, LangChain, and AWS SageMaker, resulting in double-digit gains in personalization and automation.

Strategic leader who has directed cross-functional teams of 8+, instituted rigorous engineering standards, and accelerated delivery velocity by over 35% through agile transformation, advanced CI/CD, and mentorship of mid/senior talent. Passionate about writing clean, type-safe, observable code and crafting exceptional user experiences that blend performance, accessibility, and cutting-edge intelligence. PROFESSIONAL EXPERIENCE

Senior Full-Stack Developer / Team Leader

WOLFPACK DIGITAL 12/2023 - 09/2025 Kirkland (Remote), US Spearheaded the end-to-end development of a high-traffic e-commerce platform utilizing React, Next.js, Node.js, Java (Spring Boot), and Go microservices, backed by MongoDB and AWS infrastructure (EC2, RDS, ElastiCache, Lambda), resulting in a 40% surge in user engagement and a 25% decrease in page load times. Pioneered the integration of AI-driven recommendation engines powered by TensorFlow and PyTorch, analyzing user behavior patterns to deliver hyper- personalized content, which elevated conversion rates by 30% and positioned the platform as a leader in user-centric innovation.

Directed a cross-functional team of 8 developers, conducting regular code reviews, implementing agile methodologies, and providing mentorship on full-stack best practices, including seamless AI/ML integrations, which enhanced team productivity by 35% and reduced project delivery timelines.

Architected robust microservices infrastructure using Docker and Kubernetes for containerization and orchestration, ensuring high availability, fault tolerance, and zero-downtime deployments for mission-critical applications serving millions of users.

Collaborated with product managers and UX designers to implement secure authentication and authorization systems leveraging OAuth, JWT, and advanced encryption techniques, mitigating security risks by 50% and complying with industry standards like GDPR and CCPA.

Optimized application performance through in-depth profiling and refactoring of legacy code, incorporating tools like New Relic for monitoring, which led to a 45% improvement in response times and significant cost savings on cloud resources. Led cloud-native transformation on AWS (ECS, S3, CloudFront, Lambda@Edge, Step Functions), reducing infrastructure costs by 38% while scaling to millions of daily active users.

Full-Stack Developer

Yellow 07/2020 - 08/2023 San Francisco (Remote), US Engineered enterprise-level SaaS applications with Vue.js/Nuxt.js frontend and Python/Django + Java (Spring) + Go (Fiber/Gin) backend services, incorporating real-time features via WebSockets and AWS SNS/SQS that boosted system responsiveness by 35%.

Designed and deployed ML-powered analytics dashboards on AWS SageMaker and EC2, utilizing PyTorch and Pandas, delivering actionable insights that reduced client overhead by 20%.

Enhanced database efficiency by optimizing complex queries in PostgreSQL and refining API endpoints with Express.js, achieving a 45% performance uplift for data- heavy modules and ensuring smooth handling of high-volume transactions. Established automated CI/CD pipelines using GitHub Actions and Jenkins, automating testing and deployment workflows that shortened release cycles from weeks to days, minimized human error, and accelerated time-to-market for new features.

Actively contributed to open-source communities on GitHub, developing AI- enhanced tools for web automation that garnered over 500 stars and forks, demonstrating thought leadership and fostering collaborations with industry peers. Integrated third-party services and APIs for advanced functionalities, such as natural language processing with TensorFlow.js, which improved user query handling accuracy by 28% and enriched application intelligence. TECHNICAL SKILLS

React Next.js Redux/Zustand/Context API

Vue.js Nuxt Angular.js Svelte Vite

JavaScript (ES6+) TypeScript C++ C#

Responsive design HTML5 CSS3 SCSS

Bootstrap Web Accessibility Tailwind CSS

styled-components Node.js Express

Python Django/Flask-style APIs REST APIs

Ruby (Rails-style MVC concepts) Fast API

Java (Spring Boot) Go Cloud & DevOps

Kubernetes (Helm, ArgoCD, Keda) gRPC

Serverless Framework Numpy Pandas

WebSockets Digital Ocean Scikit-learn

Authentication & authorization (JWT, sessions)

MySQL SQL MongoDB DynamoDB

PostgreSQL NoSQL Redis (RedisStack)

PlanetScale Prisma ORM Supabase

Data preprocessing TensorFlow PyTorch

AWS (EC2, S3, Lambda) Docker Git/GitHub

CI/CD Pipelines Cross-Browser Compatibility

Web Vitals Playwright Cypress E2E Jira

Trello Notion Clickup Slack

CERTIFICATIONS

Frontend Developer

https://www.hackerrank.com/certificates/8d841f374c03 JavaScript

https://www.hackerrank.com/certificates/3b02915b1da4 Python

https://www.hackerrank.com/certificates/54e05f5e14c9 Legacy Front End

https://www.freecodecamp.org/certification/fcc233c2a12

-4d83-4346-8ee0-99613930e681/legacy-front-end

Front End Development Libraries

https://www.freecodecamp.org/certification/fcc233c2a12

-4d83-4346-8ee0-99613930e681/front-end-

development-libraries

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PROFESSIONAL EXPERIENCE

Junior Full-Stack Web Developer

Human Made 11/2018 - 04/2020 Matlock (Remote), England Played a key role in migrating legacy Ruby on Rails monoliths into Java (Spring Boot) and Go microservices deployed on AWS ECS/Fargate, improving scalability and reducing deployment times by 60%.

Incorporated AI capabilities through third-party APIs for sentiment analysis and predictive modeling, enhancing application interactivity and user satisfaction ratings by 25%, while gaining deep insights into ML deployment in production environments.

Identified and resolved intricate bugs in legacy codebases using debugging tools like Chrome DevTools and Rails console, improving overall system stability, reducing crash rates by 40%, and ensuring uninterrupted service for end-users. Developed responsive and mobile-first user interfaces with TypeScript and SCSS, adhering to WCAG accessibility standards to create inclusive experiences that performed flawlessly across devices and browsers.

Supported cloud migrations by transitioning on-premise data to AWS services like EC2 and S3, enabling scalable infrastructure that accommodated rapid user growth and provided 99.9% uptime.

Participated in agile sprints, collaborating with designers and stakeholders to iterate on features, incorporating user feedback loops that refined product roadmaps and accelerated feature adoption.

Assisted in building custom GraphQL APIs to replace REST endpoints, streamlining data fetching and reducing payload sizes by 30%, which optimized frontend performance and developer efficiency.

Front-End Web Developer Intern

Pt. Astra International Tbk Company

03/2018 - 07/2018 Jakarta (Onsite), Indonesia

Contributed to the creation of engaging web interfaces using JavaScript, React, and modern CSS frameworks, supporting the launch of a flagship product that attracted over 10,000 active users within the first quarter. Gained foundational full-stack exposure by assisting with backend tasks in Node.js, including API development and database integrations, which broadened my technical skill set and prepared me for advanced roles. Performed rigorous code testing and quality assurance using frameworks like Jest, identifying UI inconsistencies and accessibility issues to deliver polished, user- friendly experiences.

Engaged in collaborative team environments through daily stand-ups and code reviews, absorbing industry best practices in version control with Git and agile project management, which fast-tracked my professional development. Assisted in SEO optimizations and performance tuning for web pages, implementing lazy loading and compression techniques that enhanced site speed scores by 35% on tools like Google PageSpeed Insights.

LANGUAGES

English Proficient Indonesian Native

EDUCATION

Bachelor's Degree in Computer Science

University of Indonesia 02/2015 - 03/2018 Depok, INDONESIA Coursework: Data Structures & Algorithms, Web Development, User Interface Design, Database Systems.

Senior Project: Developed an accessible e-learning platform for visually impaired students using React.js and Web Speech API.

Student Web Development Club President (2017-2018): Led team of 20 students in creating web applications for campus organizations. CERTIFICATIONS

Legacy JavaScript Algorithms and Data Structures

https://www.freecodecamp.org/certification/fcc233c2a12

-4d83-4346-8ee0-99613930e681/javascript-algorithms- and-data-structures

Data Analysis with Python

https://www.freecodecamp.org/certification/fcc233c2a12

-4d83-4346-8ee0-99613930e681/data-analysis-with-

python-v7

Responsive Web Design

https://www.freecodecamp.org/certification/fcc233c2a12

-4d83-4346-8ee0-99613930e681/responsive-web-

design

KEY STRENGTHS

My Strengths

Modern Full-Stack Architecture : Proven

expertise in designing and delivering cloud-

native, high-traffic applications using

React/Next.js, Vue/Nuxt, Node.js, Go, Java

(Spring Boot), Python/Django, and microservices

patterns — consistently achieving 30–50% gains

in performance, scalability, and developer

velocity.

Cloud & DevOps Leadership : Hands-on

architect of production systems on AWS (EKS,

ECS, Lambda, RDS, DynamoDB, S3, CloudFront,

SageMaker); specializing in cost optimization,

auto-scaling, CI/CD orchestration, and zero-

downtime deployments with Docker, Kubernetes,

and Infrastructure-as-Code.

Performance Optimization : Deep experience in

advanced optimization techniques — code

splitting, lazy loading, server-side rendering,

edge caching, database query tuning, and

profiling — routinely delivering sub-1-second

load times and 90+ Lighthouse scores on

enterprise platforms.

Testing & Quality Assurance: Experienced in

TDD and maintaining large test suites using

RSpec, Jest, and Cypress, achieving high code

coverage and minimizing regressions in

collaborative settings.

Collaboration & Leadership : Pragmatic team

player with experience leading developers,

mentoring juniors, and partnering with

backend/UX teams to deliver features via

Agile/Scrum methodologies.

Adaptability & Learning: Quick to adapt to full-

stack realities, with exposure to React in Rails

views and a curiosity for emerging tools to

ensure innovative, maintainable solutions.

INTERESTS

About Me

When not coding, I enjoy landscape photography,

hiking Indonesia's volcanic trails, and practicing mindfulness through meditation—habits that sharpen my creative problem-solving in full-stack development.

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