QUALITY ENGINEERING AT SPEED I'm an ISTQB-certified quality engineer with 10+ years of experience building automated testing systems that let teams ship fast without breaking things. --- TRACK RECORD ✓ 9,000+ hours | 100% Job Success Score | Top Rated Plus ✓ ISTQB Certified | Founder & CEO at QA SONIC ✓ 50+ engagements across fintech, SaaS, e-commerce, healthtech --- SPECIALIZED EXPERTISE TEST AUTOMATION I build end-to-end suites using Playwright, Cypress, and Selenium that catch regressions before production. Recent results: - 96% rollback reduction (4/month → 0.2/month) - Test coverage: 31% → 89% in 8 weeks - Regression runtime: 6 hours → 12 minutes PAYMENT GATEWAY TESTING 11+ processors tested: Stripe, PayPal, Authorize.net, Square, Braintree, Razorpay, and more. I validate checkout flows, failed payments, refunds, subscriptions, multi-currency, and PCI compliance. This isn't surface-level clicking—it's systematic validation of every payment scenario that matters. AI/LLM TESTING Response quality testing (DeepEval), RAG validation (RAGAs), hallucination detection, prompt injection testing, regression testing for AI features. PERFORMANCE ENGINEERING k6, JMeter, sitespeed for load testing and optimization. Load-tested a Product Hunt launch that handled 110K concurrent users (11x projection) with zero downtime. CI/CD INTEGRATION GitHub Actions, GitLab CI, Jenkins setup. Automated test execution on every PR, quality gates, Slack notifications, test dashboards. --- TECH STACK Automation: Playwright, Cypress, Selenium, Appium Languages: JavaScript/TypeScript, Python, Java Performance: k6, JMeter, Lighthouse, sitespeed AI Testing: DeepEval, RAGAs, LangSmith CI/CD: GitHub Actions, GitLab CI, Jenkins Cloud: AWS, Azure, GCP --- HOW I WORK Week 1: Analyze your stack, identify gaps, and deliver test strategy Weeks 1-2: Build framework, create initial suite, integrate CI/CD Ongoing: Comprehensive testing, detailed bug reports, weekly metrics --- WHAT YOU GET ✓ Daily updates via Slack/email ✓ Clean, documented test code ✓ Detailed bug reports with screenshots/videos ✓ Quality metrics dashboards ✓ Knowledge transfer if needed --- WORKING WITH ME I'm direct, systematic, and focused on results. No corporate buzzwords or vague updates—just clear communication, measurable progress, and quality improvements you can see in your metrics. If you need someone to "run through a test plan," I'm not your guy. But if you need someone who can architect testing infrastructure that scales with your velocity—let's talk. --- AVAILABILITY 20-40 hours/week | GMT+5 (flexible for US/EU) Minimum: 20 hours | Prefer long-term partnerships --- RECENT CLIENT FEEDBACK "Ahsan's payment gateway testing saved us from a critical Stripe bug right before launch. He understands edge cases most QA teams miss." - Engineering Lead, Fintech "We went from manual testing to fully automated CI/CD in under a month." - Product Manager, SaaS --- READY TO BUILD QUALITY IN? 📧 Message me with your stack, goals, and timeline. I respond within 24 hours. Let's build something that doesn't break.

Hello! I’m Mikolaj, a full stack web and mobile app developer with 5+ years of experience building production ready mobile apps, SaaS platforms, MVPs, marketplaces, admin dashboards, and AI-powered applications. I specialize in React Native, Expo, Flutter, Swift, Kotlin, Next.js, Node.js, Firebase, Supabase, PostgreSQL, Stripe, RevenueCat, and AWS. I can help you build a new product from scratch, improve an existing MVP, fix bugs, optimize performance, or prepare your app for App Store and Google Play release. What I Can Help You With 📱 Mobile App Development Cross-platform iOS and Android apps using React Native, Expo, and Flutter, with native Swift/Kotlin integrations when needed. I handle architecture, UI implementation, API integration, testing, builds, and store submission. 💻 Web Apps & Admin Panels Modern web applications, dashboards, and SaaS platforms using React, Next.js, TypeScript, and Tailwind CSS. ⚙️ Backend Development Secure and scalable APIs with Node.js, Express, NestJS, Firebase, Supabase, and PostgreSQL. I build authentication, real-time features, subscriptions, chat, notifications, and admin systems. 💳 Payments & Subscriptions Stripe, RevenueCat, in-app purchases, subscription logic, webhook handling, and payment flows for mobile and web apps. ☁️ Deployment & DevOps AWS, Docker, GitHub, CI/CD, app store deployment, production configuration, bug fixing, and performance optimization. Project Types I Work On * MVPs for startups * SaaS platforms * AI-powered mobile and web apps * Marketplaces * Chat and social apps * E-commerce platforms * Booking and on-demand service apps * Internal business tools * Admin dashboards * Subscription-based apps Why Work With Me I take ownership of the full development process, from planning and architecture to launch. I write clean, maintainable code, communicate clearly, and focus on delivering a product that is stable, scalable, and easy to continue building on. I’m especially interested in long-term projects where I can help improve the product, add new features, and support growth after launch. ✨ Let’s build something reliable, modern, and ready for real users. Feel free to reach out and tell me about your project.

🚀 Design Pitch Decks and Presentations that Win Attention — and Investment ✅ 8+ Years of Experience – PowerPoint, Google Slides, and Canva ✅ 1000+ Decks Designed for Startups, Agencies & Fortune-Level Teams ✅ Helped Founders Raise $75M+ in Seed & Series A Rounds ✅ Expert in Storytelling, Visual Hierarchy & Slide System Design I don’t just design slides — I design outcomes. Every presentation I craft is built to impress investors, persuade clients, and convert audiences. 👉 Investor Pitch Decks Decks for SaaS, AI, Fintech, and EdTech startups that raised up to $5M+ in funding. Built decks featured in Y Combinator, TechCrunch, and Product Hunt showcases. 👉 Corporate & Sales Presentations Re-engineered dull internal decks into branded visual stories that close deals. Created reusable templates for marketing, quarterly reports, and webinars. 👉 Presentation Systems & Templates Designed scalable PowerPoint, Google Slides and Canva template systems for large teams. Included custom layouts, master slides, and easy brand-update controls. I also run a creative studio focused exclusively on pitch decks, brand decks, and presentation templates. We help founders, agencies, and marketing teams communicate with clarity, confidence, and design excellence. Here’s what we deliver: ✅ Investor Pitch Decks (Seed → Series C) ✅ PowerPoint, Google Slides and Canva Templates ✅ Company Profiles & Sales Decks ✅ Startup One-Pagers & Executive Summaries ✅ Presentation Systems & Slide Libraries If you’re looking for a designer who understands both business strategy and design psychology, let’s collaborate. Your message deserves slides that look exceptional and feel inevitable. 💬 Message me — and if my first concept doesn’t impress you, you don’t pay a penny.

Proven at National and Global Scale | Build Backend Systems delivering $140M+ annually across 100M+ users | 10+ projects delivered | Comfortable working in EST, PST, and CET Struggling with backend bottlenecks or scaling limits? I build high-performance Golang & Python systems that handle high concurrency, ensuring 99.9% uptime and preventing crashes, even with a million active users online. I specialize in Golang & Python development, crafting robust APIs, event-driven architectures, and data-intensive systems that power real-world products, from eCommerce platforms to fintech applications, AI/ML-powered solutions, and real-time data pipelines. DRIVING REVENUE GROWTH AT SCALE. 1. National highway system (OneNetwork): - 100M+ vehicles and PKR 40 billion+ (~$140M USD) in annual transaction volume across multiple tollbooths - Local bank integrations for online payment processing and a centralized ledger for reconciling cash payments and online transactions. 2. Dotshop.ai (eCommerce platform) - 100,000+ concurrent users, 15k+ reqs/second - Up to $50,000/month in processed sales, with automated curator/platform revenue splits. If you’re looking for a backend engineer who can own your project end-to-end, from architecture design to production deployment, I can be your one-stop solution. WHAT I DELIVER → APIs & backend systems handling 1M+ concurrent users with zero latency spikes or downtime (Go, Python, gRPC, WebSockets) → Event-driven microservices processing millions of real-time events daily with zero data loss. → Database architecture tuned for sub-millisecond query response at billion-row scale (PostgreSQL, MongoDB, TimescaleDB) → Payment & revenue infrastructure handling automated splits, payouts, reconciliation using Stripe, Adyen, Braintree. → AI-powered agents & automation for support, document processing, and predictive analytics, built to plug directly into your existing backend → Production focus from Day 1: Containerized, CI/CD-driven, cloud-native development (Docker, GitHub Actions, AWS/GCP). It works in the real world, not just on my laptop. TECH STACK 🔹 Languages: Golang, Python 🔹 Frameworks: Fiber, Gin, Echo, Flask, FastAPI, Django 🔹 Databases: PostgreSQL, MongoDB, TimescaleDB, CockroachDB, Redis, ElasticSearch, Qdrant, Weaviate. 🔹 Technologies: gRPC, GraphQL, Debezium, JWT/Paseto, WebRTC, Celery, Asynq. 🔹 Messaging/Events: Kafka, RabbitMQ, WebSockets, Webhooks. 🔹 DevOps: Docker, GitHub Actions, Automated Testing. 🔹 Deployments: Clouds(AWS, GCP). 🔹 Integrations: Stripe, Adyen, Braintree, Klaviyo, SearchSpring, Twilio, Google Merchant Center. PAST EXPERIENCE: E-Commerce & Marketplaces: High-concurrency platforms with secure payments, recommendation systems, and advanced product search using ML. Smart Infrastructure & IoT: Vehicle tracking, RFID ingestion, real-time data sync. Fintech & Trading Apps: Live streaming data, ML-driven signals, secure user management. Food & Delivery Platforms: Order lifecycle, payment gateway integrations with Stripe, and delivery logistics handling. AI & NLP: Sentence correction, OCR pipelines, and AI-powered automation. I don’t just write code, I build backend engines that accelerate business growth. Whether you need a new system from scratch or to scale your existing product, I’ll help you architect, develop, and deploy with confidence. Message me with your project plan, current bottlenecks, or architecture challenges, and I’ll provide a free scaling strategy within 12 hours.

🎁 𝗜 𝗿𝗲𝘃𝗶𝗲𝘄 𝘆𝗼𝘂𝗿 𝗮𝗽𝗽 𝗶𝗱𝗲𝗮 𝗼𝗿 𝗲𝘅𝗶𝘀𝘁𝗶𝗻𝗴 𝗔𝗻𝗱𝗿𝗼𝗶𝗱 𝗰𝗼𝗱𝗲 𝗮𝗻𝗱 𝘀𝘂𝗴𝗴𝗲𝘀𝘁 𝗽𝗿𝗮𝗰𝘁𝗶𝗰𝗮𝗹 𝗶𝗺𝗽𝗿𝗼𝘃𝗲𝗺𝗲𝗻𝘁𝘀 𝗯𝗲𝗳𝗼𝗿𝗲 𝘆𝗼𝘂 𝗵𝗶𝗿𝗲 𝗺𝗲. Many clients come to me after dealing with: → 𝗔𝗽𝗽𝘀 𝘁𝗵𝗮𝘁 𝗰𝗿𝗮𝘀𝗵 𝗼𝗿 𝘀𝗹𝗼𝘄 𝗱𝗼𝘄𝗻 𝘂𝗻𝗱𝗲𝗿 𝗿𝗲𝗮𝗹 𝘂𝘀𝗲𝗿𝘀 → 𝗣𝗼𝗼𝗿 𝗚𝗣𝗦 𝗮𝗰𝗰𝘂𝗿𝗮𝗰𝘆, 𝗯𝗮𝗰𝗸𝗴𝗿𝗼𝘂𝗻𝗱 𝘁𝗿𝗮𝗰𝗸𝗶𝗻𝗴 𝗶𝘀𝘀𝘂𝗲𝘀, 𝗼𝗿 𝘂𝗻𝗿𝗲𝗹𝗶𝗮𝗯𝗹𝗲 𝗻𝗮𝘃𝗶𝗴𝗮𝘁𝗶𝗼𝗻 → 𝗠𝗲𝘀𝘀𝘆 𝗮𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 𝘁𝗵𝗮𝘁’𝘀 𝗵𝗮𝗿𝗱 𝘁𝗼 𝘀𝗰𝗮𝗹𝗲 → 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿𝘀 𝘄𝗵𝗼 𝘀𝗵𝗶𝗽 𝗳𝗲𝗮𝘁𝘂𝗿𝗲𝘀 𝗯𝘂𝘁 𝗱𝗶𝘀𝗮𝗽𝗽𝗲𝗮𝗿 𝗮𝗳𝘁𝗲𝗿 𝗹𝗮𝘂𝗻𝗰𝗵 I build stable, scalable, and real-world Android applications that perform reliably in production. With 9+ years of hands-on Android experience, I code myself, focus on clean architecture, and deliver apps businesses can confidently scale. From MVP to Play Store — I make sure your app is fast, accurate, battery-efficient, and crash-free. ➤ 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 → Native Android App Development → Kotlin & Java → Jetpack Compose UI → Clean Architecture (MVVM, MVI) → Performance, stability & memory optimization → GPS, Maps & real-time tracking systems ➤ 𝗦𝗸𝗶𝗹𝗹𝘀 → Android SDK → Kotlin, Java → Jetpack Compose → Firebase (Auth, Firestore, FCM) → REST API integration → Room & SQLite → Google Maps, location services & background tracking ➤ 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀 → Android app development (MVP → Production) → New app builds & existing app improvements → App performance optimization & crash fixing → Firebase & real-time features → GPS navigation, tracking & location-based features → Play Store release & long-term maintenance ➤ 𝗪𝗼𝗿𝗸𝗶𝗻𝗴 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 → 9+ years Android development → 20+ commercial Android apps delivered → Apps with 1M+ active users → Startup & enterprise-level products → Long-term product ownership mindset ➤ 𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝘆 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 → eCommerce & grocery delivery apps → FinTech & payment systems → Delivery & on-demand platforms → Streaming & media apps → Enterprise mobile solutions → GPS navigation, speed alerts & road-hazard systems → Maps-based apps, real-time tracking & driver utilities ➤ 𝗗𝗼𝗺𝗮𝗶𝗻 𝗞𝗻𝗼𝘄𝗹𝗲𝗱𝗴𝗲 → Scalable mobile architectures → High-traffic handling → Secure transactions & payment flows → Offline-first mobile apps → Battery-optimized background services → Navigation accuracy, GPS performance & map reliability ➤ 𝗧𝗼𝗼𝗹𝘀 → Android Studio → Git, GitHub, Bitbucket → Firebase Console → Jira, Trello → Jenkins, Fastlane → Google Maps API, Location Services → Figma (design implementation support) 👉 Need an Android app that works reliably in real-world conditions? 👉 Building a GPS, maps, tracking, or delivery app? 👉 Click Invite to Job and get a free app review. 𝗖𝗹𝗲𝗮𝗿 𝗰𝗼𝗺𝗺𝘂𝗻𝗶𝗰𝗮𝘁𝗶𝗼𝗻. 𝗖𝗹𝗲𝗮𝗻 𝗰𝗼𝗱𝗲. 𝗥𝗲𝗹𝗶𝗮𝗯𝗹𝗲 𝗱𝗲𝗹𝗶𝘃𝗲𝗿𝘆. 𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀 Android Developer, Senior Android Developer, Kotlin Developer, Jetpack Compose, Android App Development, Native Android, Clean Architecture, MVVM, Firebase Android, GPS Tracking App, Navigation App, Google Maps Android, Location Based Apps, Background Tracking, Delivery Apps, Traffic Alert App, Performance Optimization, Crash Fixing, Play Store Deployment

Building for iOS and Android shouldn’t mean two separate teams, two codebases, and twice the headache. I design and build modern, high-performance mobile apps using Swift for iOS, Kotlin for Android, and Flutter when a single cross-platform codebase makes more sense for speed and budget. I have 10+ years of commercial experience and have delivered 50+ mobile apps. I’ve successfully delivered products in FinTech, HealthTech, EdTech, Food Delivery, E-commerce, Social, Travel, Hospitality, and SaaS, leading cross-functional teams of 3–10 engineers through the entire development cycle – from concept to App Store and Google Play launch. I don’t just ship features – I help you shape the product, optimize performance, and keep it easy to maintain. 𝗪𝗵𝗮𝘁 𝗜 𝗰𝗮𝗻 𝗯𝘂𝗶𝗹𝗱 𝗳𝗼𝗿 𝘆𝗼𝘂: 1 Cross-platform apps with Flutter One codebase → iOS & Android apps with a native feel: *Real-time chat, messaging, audio/video calls, live feeds *Maps & geolocation (Google Maps, MapBox), routing, tracking *Push notifications, in-app messaging, smooth, fluid animations *In-app purchases & subscriptions, multi-currency support *REST / GraphQL APIs, Firebase, and third-party SDK integrations 2 Native iOS apps (Swift / SwiftUI / UIKit) *iPhone & iPad apps built with Swift or SwiftUI *Architectures: MVC, MVVM, VIPER, Clean Architecture, SOLID *Deep integrations: Core Data, CloudKit, HealthKit, CoreLocation, UserNotifications *App Store–ready UX that follows Apple HIG and feels fast, responsive, and polished 3 Native Android apps (Kotlin / Java) *Modern Android apps with Kotlin and Jetpack components *MVVM & Clean Architecture, Coroutines, LiveData, DataBinding *Room, Retrofit, SQL/MySQL, Firebase (Auth, Firestore/RTDB, FCM) *Clean, eye-catching UI optimized for different screen sizes and OS versions ✔Mobile tech stack iOS, Android & Flutter ✔Languages & Frameworks Swift, SwiftUI, UIKit, Kotlin, Java, Dart, Flutter ✔Architectures & Patterns MVC, MVVM, VIPER, Clean Architecture, SOLID, state management with BLoC, Riverpod, Provider, GetX ✔ Data, APIs & Cloud REST & GraphQL APIs, Firebase (Auth, Firestore/RTDB, Cloud Messaging), Room, Retrofit, SQL/MySQL, CloudKit ✔Platform Services & Features *Real-time chat & messaging, audio/video calls, live feeds *Maps & geolocation (Google Maps, MapBox), routing, tracking *Push notifications, in-app messaging, smooth animations ✔System Integrations (iOS & Android) *Core Data, HealthKit, CoreLocation, UserNotifications on iOS *Jetpack components (LiveData, ViewModel, DataBinding), Coroutines, Dagger/Hilt on Android ✔Monetization & Payments *In-app purchases & subscriptions, multi-currency support *Stripe, PayPal, Adyen, Razorpay, Apple Pay, Google Pay ✔Security, Performance & Scale *Secure authentication: OAuth, Firebase Auth, social logins, biometrics *Experience with GDPR and HIPAA-style data protection requirements *Performance tuning: startup time, FPS, scrolling smoothness, memory usage *Crash reduction & monitoring (Crashlytics, logs, analytics) *Async & concurrent execution: async/await, GCD, Coroutines *Targeted unit & UI tests, strong debugging and profiling skills ⭐️⭐️⭐️⭐️⭐️𝗖𝗼𝗻𝗰𝗿𝗲𝘁𝗲 𝗿𝗲𝘀𝘂𝗹𝘁𝘀 - Reduced crash rates by up to 30% with monitoring and refactoring - Shortened release cycles by 10–20% using CI/CD and better branching - Increased engagement and retention by 15–50% through UX and performance improvements 🚀𝗛𝗼𝘄 𝗜 𝘄𝗼𝗿𝗸 *Product-oriented: I connect technical decisions to your business model, roadmap, and KPIs. *Lead experience: I’ve led iOS/Flutter teams (3–10 people), run code reviews, and set architecture. *Clean architecture: Structured, testable, and maintainable code that future devs can understand. *Transparent process: Regular updates, clear estimates, and honest feedback. *Flexible collaboration: Comfortable joining an existing team or owning the full mobile stream (iOS, Android, Flutter). 🔥𝗬𝗲𝘀, 𝗜 𝗰𝗮𝗻 *Fix bugs and stabilize an existing app *Build a new app from idea → App Store & Google Play *Modernize legacy codebases and migrate to newer architectures *Integrate APIs, databases, and cloud services *Add real-time features, analytics, and push notifications 🤝𝗟𝗲𝘁’𝘀 𝘁𝗮𝗹𝗸 If you need a mobile engineer focused on iOS, Android, and Flutter only - someone who writes clean, scalable code and thinks about users and business impact, not just tickets - feel free to reach out. Send me a short description of your app (or a link to your current one), and I’ll share how I’d approach building or improving your iOS/Android/Flutter product.

I am a Full-Stack Developer with 9 years of experience building and maintaining web applications. I focus on writing clean, documented code and building systems that don't break under load. 👉 What I bring to your project: • Backend: Designing scalable APIs and managing complex database schemas. • Frontend: Building functional, responsive interfaces without over-engineering. • DevOps: Deploying and managing cloud infrastructure (AWS/Azure/GCP). During my career I worked on different types of projects: dashboards, medical imaging, payments (with Stripe and other payment providers integration), drawing/design, SaaS. I am also proficient with a lot of related tools/areas: databases, task trackers, version control systems, unit tests etc I prefer working on projects with clear requirements where technical debt is taken seriously. If you need someone who can jump into a codebase and start contributing on day one, let’s connect. 👉 Key Expertise: • Vue.js 2.x/3.x/Nuxt; • React/Next.js; • Node.js/NestJS; • Laravel; • JavaScript/Typescript; • PHP; • PostgreSQL/MySQL/Mongo/Redis; • UI design/HTML5/CSS3; Contact me and we can discuss your project details!

Startups don't fail because of bad products. They fail because they didn't understand their market deeply enough — who the real competitors are, where the gaps are, and what the data actually says. That's exactly what InsightForge AI Research fixes. I'm Parth, a market research analyst with a Master's degree and deep specialization in AI technology and Fintech market intelligence. I combine live AI research tools with human analytical judgment to produce structured, cited, professionally designed reports that look like they came from a boutique consulting firm — at freelancer prices. WHAT I DELIVER: → Competitor Analysis Reports Deep dives into 3–7 competitors: pricing, positioning, feature gaps, and strategic vulnerabilities. Delivered as a professional PDF your team or investors can act on. → Market Sizing & Opportunity Reports TAM/SAM/SOM breakdowns, growth rate analysis, and trend mapping for AI, SaaS, and Fintech markets — with cited sources built for investor scrutiny. → Industry Trend Briefs Current-state analysis of where your sector is moving in 2026, with specific opportunities for new entrants and growing businesses. → Investment & Due Diligence Research Structured research summaries for angel investors, VCs, and founders preparing for fundraising conversations. → MBA & Academic Research Reports Properly cited, framework-driven market analysis — Porter's Five Forces, SWOT, PESTLE — applied to real 2026 market data. MY RESEARCH PROCESS: Step 1 — BRIEF: I ask precise questions about your exact decision, not just your industry. Step 2 — RESEARCH: Live AI research tools for current data. Every stat verified against primary sources. Nothing recycled from 2022. Step 3 — SYNTHESIS: Structured analysis with strategic interpretation layered on top. Step 4 — DESIGN: Delivered as a professionally designed PDF. Executive summary. Competitor tables. Ready to share with investors or your board. WHO I WORK WITH: ✔ Startup founders preparing for launch or fundraising rounds ✔ Marketing agencies needing competitive intelligence for client strategy ✔ MBA students and academic researchers needing structured, cited market analysis ✔ Investors running quick due diligence on a sector SPECIALIZATIONS: ⚡ AI & SaaS markets ⚡ Fintech — payments, crypto, lending, wealthtech ⚡ B2B technology ⚡ E-commerce and retail tech Master's-level analytical training. AI-powered research speed. Consulting-grade presentation. Message me before ordering. I respond within 2 hours. Sample report available immediately — judge the quality before you commit.

Are you a Startup founder preparing to pitch VCs or accelerators? Do you need a Pitch Deck that helps an Investor understand your story and traction? I help founders turn rough drafts, outdated slides, and Business Plan materials into a clear Pitch Deck built for real Investor conversations. With 9+ years of experience, I specialize in Pitch Deck development, Investor storytelling, PowerPoint execution, and Presentation Design for fundraising. I have completed 490+ Pitch Deck projects and supported founders whose companies raised $560M+ in tracked capital. My work is not only about making a Pitch Deck look polished. I shape the content, sharpen the message, improve the flow, and make every PowerPoint slide easier to understand. 🚀 My approach to content and design A strong Pitch Deck needs more than good PowerPoint visuals. It must answer Investor questions fast, explain why now, show traction clearly, and make the business case credible. I review your content through an Investor lens, identify gaps, simplify complex ideas, and reorganize the story before the Presentation Design stage begins. I help decide what belongs in the Pitch Deck, what should be removed, what needs stronger proof, and how each slide should support the next one. Once the story is clear, I translate it into clean PowerPoint slides with Presentation Design that supports clarity, trust, and momentum. 💼 What I help with • Full Pitch Deck creation from scratch • Pitch Deck redesign for an existing Investor deck • Pitch Deck content strategy and fundraising narrative • PowerPoint cleanup and PowerPoint formatting • Presentation Design for fundraising, board, and sales materials • Business Plan summary slides and Business Plan visuals • Startup story refinement and Investor messaging • Consumer Packaged Goods (CPG) and CPG Pitch Deck support for product, retail, ecommerce, and brand-led companies ✅ Why founders work with me • I build each Pitch Deck around real Investor logic • I turn complex ideas into simple PowerPoint slides • I use Presentation Design to improve clarity, not just aesthetics • I align your Pitch Deck with your Business Plan and Investor narrative • I deliver editable PowerPoint files that stay easy to update • I help each Startup communicate with more confidence 🧠 My process 1. Review your current Pitch Deck, notes, data, or Business Plan 2. Clarify your story, priorities, and core Investor questions 3. Improve the content flow, hierarchy, and fundraising logic 4. Rebuild the structure in PowerPoint with strong Presentation Design 5. Polish each Pitch Deck slide for readability and momentum 📊 Industries and stages I work with SaaS, AI, fintech, health tech, climate, marketplaces, Consumer Packaged Goods (CPG), and CPG Startup teams. Whether you need a new Pitch Deck, a sharper Pitch Deck, or a cleaner Pitch Deck, I focus on making each Investor interaction more effective through better content, PowerPoint storytelling, and Presentation Design. For Consumer Packaged Goods (CPG), I can explain product positioning, brand traction, retail strategy, ecommerce growth, unit economics, distribution, margins, and market opportunity in a way that feels clear to an Investor. A CPG Pitch Deck needs the right balance of story, numbers, visuals, product proof, and Business Plan logic, so Presentation Design must make the brand credible. 🎯 Services include • Fundraising Pitch Deck strategy • Fundraising Pitch Deck redesign • Pitch Deck content review and story improvement • PowerPoint template setup • PowerPoint master slides • Presentation Design systems • Presentation Design consistency checks • Presentation Design refinement • Business Plan to Pitch Deck transformation • Startup messaging support • Investor presentation updates • Financial slide cleanup in PowerPoint • Consumer Packaged Goods (CPG), CPG, and retail-focused Investor materials 💬 Client feedback often sounds like this “Sergio brought clarity, structure, and real Investor logic to our Pitch Deck.” “Excellent PowerPoint work, strong Presentation Design, and fast communication.” “He improved our content, refined the story, and made the Pitch Deck easier to present.” 📌 Final goal If your current Pitch Deck feels crowded, confusing, or outdated, I can turn it into a Pitch Deck that is clear, credible, and ready for the next Investor meeting. My goal is simple, build a Pitch Deck in PowerPoint with Presentation Design that supports your raise, reflects your traction, and helps every Investor understand the opportunity quickly. Need help with a Pitch Deck, PowerPoint, Presentation Design, Business Plan summary, Consumer Packaged Goods (CPG) fundraising material, CPG Investor deck, or Startup Investor presentation before your next Investor conversation? Send me a message and let’s build a stronger PowerPoint deck with Presentation Design.

I'm a Java / Spring Boot Engineer with 5+ years building and running production backend systems for a multi-tenant SaaS platform used daily by 600+ companies. I own features from design to production APIs, integrations, payment flows, database migrations, and the cloud infrastructure they run on. 💼 5+ years shipping production Java / Spring Boot systems 🏢 Core engineer on a multi-tenant SaaS serving 640+ business tenants 🔌 15+ third-party integrations built & maintained (QuickBooks, NetSuite, Adyen, Twilio, Zapier…) 💳 Payment platform experience — checkout, refunds, settlements, audit-grade transaction ledgers ☁️ Azure + AWS in production, with Terraform, CI/CD, and event-driven messaging ⚙️ 𝐖𝐡𝐚𝐭 𝐈 𝐁𝐮𝐢𝐥𝐝 Backend & Microservices: Java 8–21, Spring Boot 3, Spring Security (JWT/OAuth2), Hibernate/JPA, REST APIs, OpenAPI/Swagger, Spring Cloud Gateway, Eureka API & Third-Party Integrations: QuickBooks Online & Desktop, QuickBooks Time (TSheets), NetSuite, Adyen payments, Twilio, SendGrid, Google Workspace, Outlook, Zapier — OAuth flows, webhooks, rate limits, idempotent retries Multi-Tenant SaaS Architecture: schema-per-tenant design, row-level security, Flyway migrations orchestrated across 640+ tenant databases Data & Messaging: SQL Server / Azure SQL, MySQL, PostgreSQL, Redis, RabbitMQ (dead-letter queues, idempotent consumers), WebSockets Cloud & DevOps: Azure Functions, Azure Blob Storage, AWS (Lambda, S3, DynamoDB), Terraform, GitHub Actions CI/CD, Sentry monitoring Testing & Quality: JUnit, Mockito, integration testing, legacy-safe refactoring (I maintain Java 8 / Boot 1.5 services alongside Java 21 / Boot 3 — I won't break your existing system) AI-Accelerated Development: Cursor, GitHub Copilot — faster delivery without cutting corners ⭐ 𝐏𝐫𝐨𝐣𝐞𝐜𝐭𝐬 𝐓𝐡𝐚𝐭 𝐒𝐩𝐞𝐚𝐤 𝐟𝐨𝐫 𝐓𝐡𝐞𝐦𝐬𝐞𝐥𝐯𝐞𝐬 𝗠𝘂𝗹𝘁𝗶-𝗧𝗲𝗻𝗮𝗻𝘁 𝗥𝗲𝘀𝘁𝗼𝗿𝗮𝘁𝗶𝗼𝗻 𝗦𝗮𝗮𝗦 𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺 — Core backend engineer on an enterprise platform (jobs, CRM, scheduling, invoicing) serving 640+ contractor businesses. Own complex domain services, JWT-secured APIs, and versioned schema migrations rolled out safely across every tenant database. 𝗜𝗻𝘃𝗼𝗶𝗰𝗲 & 𝗣𝗮𝘆𝗺𝗲𝗻𝘁 𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺 — Built payment infrastructure with Adyen: payment links, hosted checkout, refunds, and settlements backed by a provider-agnostic transaction ledger designed for auditability and future PSP support (Stripe-ready schema). 𝗣𝗮𝘆𝗿𝗼𝗹𝗹 & 𝗧𝗶𝗺𝗲-𝗧𝗿𝗮𝗰𝗸𝗶𝗻𝗴 𝗦𝘆𝗻𝗰 — Designed an Azure Functions scheduler syncing QuickBooks Time (TSheets) timesheets, overtime, and payroll details into the platform across timezones — handling API pagination, rate limits, and per-tenant configuration. 𝗔𝗰𝗰𝗼𝘂𝗻𝘁𝗶𝗻𝗴 & 𝗘𝗥𝗣 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀 — Built and maintain integrations with QuickBooks Online, QuickBooks Desktop (via RabbitMQ message listeners), and NetSuite (OAuth/TBA, webhooks) keeping financial data in sync reliably between systems that were never designed to talk to each other. 💡 𝐖𝐡𝐲 𝐓𝐞𝐚𝐦𝐬 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞 I think in systems, not tickets. Before I write code I look at the failure modes: what happens when the webhook arrives twice, when the API rate-limits you mid-sync, when a migration has to run across 640 databases without downtime. I work independently or inside existing teams, communicate proactively, and hand off production-ready code with the documentation to match. 📩 𝐋𝐞𝐭'𝐬 𝐓𝐚𝐥𝐤 Need an integration built, a payment flow that can't lose money, or a Spring Boot backend that scales? Message me — I'll give you a straight technical assessment and a clear path forward. 🔑 𝐊𝐞𝐲𝐰𝐨𝐫𝐝𝐬 Java Developer · Spring Boot Developer · REST API Development · API Integration · QuickBooks API · QuickBooks Online Integration · NetSuite Integration · Payment Gateway Integration · Adyen · Stripe · SaaS Development · Multi-Tenant Architecture · Microservices · Spring Security · OAuth2 · Webhooks · RabbitMQ · Redis · Azure Functions · AWS Lambda · Terraform · SQL Server · PostgreSQL · Flyway · Hibernate · Backend Engineer · Enterprise Java · Event-Driven Architecture