Syed Ali Haider Rizvi

Syed Ali Haider Rizvi

FullStack Developer: Next.js & Go | AI Support Systems for 4M+ Merchants @ SumUp

About

𝐇𝐢! 𝐈’𝐦 𝐒𝐲𝐞𝐝 – 𝐚 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭 𝐰𝐡𝐨 𝐛𝐮𝐢𝐥𝐝𝐬 𝐚𝐩𝐩𝐬 𝐭𝐡𝐚𝐭 𝐬𝐜𝐚𝐥𝐞, 𝐬𝐞𝐥𝐥, 𝐚𝐧𝐝 𝐬𝐨𝐥𝐯𝐞 𝐫𝐞𝐚𝐥-𝐰𝐨𝐫𝐥𝐝 𝐩𝐫𝐨𝐛𝐥𝐞𝐦𝐬. Need high-performance web apps that drive revenue (without endless refactoring or tech debt)? I’ve built systems scaling to 20k+ users, slashed latency by 30%, and helped startups secure $1.5M+ in funding. How? With Scalable Code & Strategic Architecture. By the way, here’s what I deliver: ✓ 1,500+ commits in 2024/25 – shipped 15+ production-ready apps across FinTech, EdTech, and AI. ✓ Scaled Backends: Built REST/GraphQL APIs with NestJS/Node.js, optimized for 10k+ users via PostgreSQL indexing and Redis caching. ✓ Frontend Excellence: Boosted Core Web Vitals by 40% using React/Next.js, TypeScript, and Tailwind CSS while integrating Stripe and OpenAI. ✓ Leadership: Mentored 20+ developers at Zenkoders, driving 95% test coverage and Agile workflows. ✓ Cloud & DevOps: Deployed serverless microservices on AWS, automated CI/CD with GitHub Actions, and reduced infra costs by 30%. My Approach to Building Scalable Apps: Architect: Design event-driven systems with RabbitMQ and microservices for resilience. Code: Ship clean, maintainable UIs (React/Next.js) and high-performance APIs (NestJS/GraphQL). Optimize: Slash latency with Redis, database tuning, and bundle splitting. Scale: Deploy globally via AWS/GCP and monitor with Grafana. Why Berlin? ✅ Relocated & Ready: Chancenkarte Visa | Tax ID | Anmeldung | German Number ✅ Immediate Availability: Eager to contribute to Berlin’s tech ecosystem while advancing my Deutsch to B2. Let’s connect if you need: ✅ A Full Stack Architect who ships secure, scalable apps (AI, FinTech, or beyond). ✅ A leader who bridges tech and business goals. ✅ Or just chat over Kaffee ☕ about code, scaling, or Berlin’s startup scene! P.S. Check my projects below – they solve real problems, not just write code.

Country

Germany

City

Berlin

Industry

Computer Software

Skill

Kubernetes, Go (Programming Language), Grafana, Computer Science, Responsive Web Design, Artificial Intelligence (AI), Webpack, LangChain, Docker, Amplitude Analytics, Customer.io, Google Cloud Platform (GCP), React, AWS Elastic Beanstalk, Nest.js, Docker Swarm, Server Side Programming, Code Refactoring, Server Side, Debugging

Experience

SumUp

FullStack Developer: Next.js & Go | AI Support Systems for 4M+ Merchants

SumUp

LinkedIn
2025-7 - Present · 1 yr 3 mos

Berlin, Germany

𝐖𝐡𝐚𝐭 𝐈'𝐦 𝐝𝐨𝐢𝐧𝐠: Managing the support experience for over 4 million merchants who use SumUp across 36+ countries. Basically, when a small business owner needs help with their payment system, our code makes sure they get it fast and efficiently. 𝐓𝐡𝐞 𝐜𝐨𝐨𝐥 𝐬𝐭𝐮𝐟𝐟 𝐈'𝐦 𝐰𝐨𝐫𝐤𝐢𝐧𝐠 𝐨𝐧: AI Escalation Magic: Built smart systems that can figure out when a merchant's problem needs human help vs when our AI can handle it. No more waiting in long queues for simple issues - the system now knows the difference between "How do I refund?" and "My terminal caught fire." 𝐕𝐨𝐈𝐏 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧: This one's been fun - created voice calling features right inside the SumUp dashboard. Merchants can literally call support without leaving their payment interface. Used Go for the backend heavy lifting and WebRTC to make the calls crystal clear. 𝐈𝐧-𝐀𝐩𝐩 𝐂𝐚𝐥𝐥𝐬 & 𝐐𝐑 𝐅𝐞𝐚𝐭𝐮𝐫𝐞𝐬: Remember those QR codes for restaurant menus during COVID? Same idea, but for getting instant support. Scan, connect, problem solved. Also built the in-app calling system so merchants don't have to juggle between apps. 𝐂𝐡𝐚𝐭 𝐈𝐟𝐫𝐚𝐦𝐞 𝐌𝐚𝐠𝐢𝐜: Managing and developing this embeddable chat widget that works everywhere - in the main dashboard, on websites, basically anywhere merchants need help. Real-time messaging with WebSockets, because nobody likes waiting for responses. 𝐃𝐚𝐬𝐡𝐛𝐨𝐚𝐫𝐝 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧: The main SumUp dashboard now has all support tools built right in. Device troubleshooting, priority issues, chat support - everything in one place instead of jumping between different systems. 𝐓𝐡𝐞 𝐢𝐦𝐩𝐚𝐜𝐭: Support tickets get resolved faster, merchants don't get frustrated with slow systems, and small businesses can focus on running their business instead of fighting with payment tech.

Zenkoders

Senior Full Stack Developer: React & Node.js | AI Products for 100k+ Users | $500K+ Funded

Zenkoders

LinkedIn
2024-1 - 2025-7 · 1 yr 7 mos

USA/Pakistan

𝐄𝐧𝐝-𝐭𝐨-𝐄𝐧𝐝 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦 𝐋𝐚𝐮𝐧𝐜𝐡𝐞𝐬 𝐒𝐢𝐭𝐮𝐚𝐭𝐢𝐨𝐧: Build MVP and Manage Large scale applications. 𝐓𝐚𝐬𝐤: Lead full-stack development team of 20+ developers and ensure on-time launch. 𝐀𝐜𝐭𝐢𝐨𝐧: - Architected Nest.js backends with Stripe Connect integration for global payments. - Built real-time community features (chat, events) using WebSocket and React Server Components. - Migration from Salesforce (SOQL) to Custom Admin panel using React + Vite, Nest.Js, AWS and PostgreSQL. - Deployed on Supabase, Firebase Functions, AWS (Lambda, S3) with Terraform for IaC, reducing cloud costs by 25%. 𝐑𝐞𝐬𝐮𝐥𝐭: Launched multiple MVPs in 3-4 months, enabling creators to triple revenue through memberships and handling large scale application side-by-side 𝐓𝐞𝐚𝐦 𝐌𝐞𝐧𝐭𝐨𝐫𝐬𝐡𝐢𝐩 & 𝐏𝐫𝐨𝐜𝐞𝐬𝐬 𝐈𝐦𝐩𝐫𝐨𝐯𝐞𝐦𝐞𝐧𝐭 𝐒𝐢𝐭𝐮𝐚𝐭𝐢𝐨𝐧: Rapid team growth caused inconsistent coding practices and slower releases. 𝐓𝐚𝐬𝐤: Standardize workflows and mentor junior developers. 𝐀𝐜𝐭𝐢𝐨𝐧: - Introduced Turborepo monorepos to unify 12+ microservices and frontend apps ( micro-frontend ) - Conducted biweekly workshops on React Server Components and microservices best practices. - Automated CI/CD with GitHub Actions, reducing deployment time from 2 hours to 20 minutes. 𝐑𝐞𝐬𝐮𝐥𝐭: Improved team velocity by 40% and reduced production incidents by 60%. 𝐊𝐞𝐲 𝐌𝐞𝐭𝐫𝐢𝐜𝐬 𝐀𝐜𝐫𝐨𝐬𝐬 𝐑𝐨𝐥𝐞𝐬: - $2M+ Revenue: Delivered throughout all products (e.g., GrasprAI, Tribal Health Scheduler app, khuta). - 100k+ Users: Supported across platforms via scalable architecture. - 50% Faster Releases: Achieved via DevOps optimizations and modern tooling. Projects on which I have worked: https://tribalhealth.com https://khuta.om https://dev.amiiigo.com/en/start https://aiquery.co https://www.qwik-inc.com

Zenkoders

Full Stack Developer ( Node.js & React.js )

Zenkoders

LinkedIn
2023-8 - 2024-1 · 6 mos

USA/Pakistan

𝐀𝐈-𝐏𝐨𝐰𝐞𝐫𝐞𝐝 𝐅𝐞𝐚𝐭𝐮𝐫𝐞 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐒𝐢𝐭𝐮𝐚𝐭𝐢𝐨𝐧: A client needed AI-driven features to compete in the EdTech market. 𝐓𝐚𝐬𝐤: Integrate OpenAI and LangChain into a learning platform. 𝐀𝐜𝐭𝐢𝐨𝐧: - Built a GPT-4-powered Q&A module using React Query and WebSocket for real-time responses. - Designed a PDF/voice-processing pipeline with LangChain for automated quiz generation. - Optimized API latency by 50% using Redis caching for frequent AI model calls. 𝐑𝐞𝐬𝐮𝐥𝐭: Drove a 65% increase in user engagement and secured $50k in pre-launch funding. 𝐃𝐞𝐬𝐢𝐠𝐧 𝐒𝐲𝐬𝐭𝐞𝐦 𝐋𝐞𝐚𝐝𝐞𝐫𝐬𝐡𝐢𝐩 𝐒𝐢𝐭𝐮𝐚𝐭𝐢𝐨𝐧: Inconsistent UI across 8+ apps increased development time and bugs. 𝐓𝐚𝐬𝐤: Create a unified design system for cross-team adoption. 𝐀𝐜𝐭𝐢𝐨𝐧: - Developed a Storybook-based component library with Tailwind and Radix primitives. - Enforced strict TypeScript prop definitions and accessibility (a11y) standards. - Trained 15+ developers on component-driven development, ZenTech Batch. 𝐑𝐞𝐬𝐮𝐥𝐭: Reduced UI-related bugs by 70% and accelerated feature delivery by 35%. Projects on which I have worked/working: https://graspr.ai https://militarycoach.zenkoders.com https://khuta.om https://www.ybudget.com https://voterconnect.info

Zenkoders

Frontend Engineer

Zenkoders

LinkedIn
2021-10 - 2023-8 · 1 yr 11 mos

(USA/Pakistan)

𝐌𝐢𝐜𝐫𝐨-𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝 𝐀𝐝𝐨𝐩𝐭𝐢𝐨𝐧 𝐟𝐨𝐫 𝐒𝐜𝐚𝐥𝐚𝐛𝐢𝐥𝐢𝐭𝐲 𝐒𝐢𝐭𝐮𝐚𝐭𝐢𝐨𝐧: A monolithic EdTech app struggled with feature updates and team collaboration. 𝐓𝐚𝐬𝐤: Transition to micro-frontends to enable parallel development and deployment. 𝐀𝐜𝐭𝐢𝐨𝐧: - Architected a micro-frontend system using Module Federation (Webpack 5) for 3 sub-teams. - Standardized shared components (e.g., auth, payment modules) across applications. - Reduced build times by 40% through incremental static regeneration (Next.js). 𝐑𝐞𝐬𝐮𝐥𝐭: Accelerated feature releases by 50% and onboarded 10k+ users for the EdTech platform. 𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞-𝐂𝐫𝐢𝐭𝐢𝐜𝐚𝐥 𝐎𝐩𝐭𝐢𝐦𝐢𝐳𝐚𝐭𝐢𝐨𝐧 𝐒𝐢𝐭𝐮𝐚𝐭𝐢𝐨𝐧: A social networking app’s Core Web Vitals scored below 50/100, hurting SEO. 𝐓𝐚𝐬𝐤: Achieve Lighthouse scores above 90/100 for key pages. 𝐀𝐜𝐭𝐢𝐨𝐧: - Implemented memoization, virtualized lists, and image lazy-loading. - Reduced JS bundle size by 45% using Vite and tree-shaking. - Configured SSR caching with Redis to improve TTFB by 30%. 𝐑𝐞𝐬𝐮𝐥𝐭: Boosted Lighthouse scores to 88/100, improving organic traffic by 60%.

Zenkoders

Junior Frontend Engineer

Zenkoders

LinkedIn
2021-1 - 2021-10 · 10 mos

Remote (USA/Pakistan)

𝐌𝐢𝐠𝐫𝐚𝐭𝐢𝐨𝐧 𝐭𝐨 𝐌𝐨𝐝𝐞𝐫𝐧 𝐑𝐞𝐚𝐜𝐭 𝐏𝐚𝐭𝐭𝐞𝐫𝐧𝐬 𝐒𝐢𝐭𝐮𝐚𝐭𝐢𝐨𝐧: Legacy React apps suffered from slow performance and unmaintainable code. 𝐓𝐚𝐬𝐤: Refactor frontend architecture to improve scalability and user experience. 𝐀𝐜𝐭𝐢𝐨𝐧: - Upgraded 5+ legacy React apps to use functional components, hooks, and Context API for state management. - Introduced code-splitting with React.lazy and Webpack to reduce initial load time by 25%. - Implemented unit testing (Jest) with 80% coverage to ensure stability. - 𝐑𝐞𝐬𝐮𝐥𝐭: Improved app performance metrics by 30% and reduced bug reports by 40%. 𝐔𝐈/𝐔𝐗 𝐎𝐯𝐞𝐫𝐡𝐚𝐮𝐥 𝐟𝐨𝐫 𝐅𝐢𝐧𝐓𝐞𝐜𝐡 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦 𝐒𝐢𝐭𝐮𝐚𝐭𝐢𝐨𝐧: A FinTech client’s dashboard had poor usability and high bounce rates. 𝐓𝐚𝐬𝐤: Redesign the UI to enhance user engagement and retention. 𝐀𝐜𝐭𝐢𝐨𝐧: - Rebuilt the dashboard using Material-UI and Tailwind CSS, adopting atomic design principles. - Integrated real-time data visualization with Chart.js and WebSocket for live updates. - Collaborated with backend teams to optimize API response times. - 𝐑𝐞𝐬𝐮𝐥𝐭: Reduced bounce rate by 35% and increased user session duration by 20%. Projects on which I have worked/working: https://haelf.com https://infinityweb.app/

Simplicore

Junior React Js Developer

Simplicore

LinkedIn
2021-10 - 2021-12 · 3 mos

Karāchi, Sindh, Pakistan

Worked with the frontend team to build a responsive user interface for SimpliCore, also collaborated with other members of the team, a UX designer, back-end developers, content developers, and a project manager. ☆ Daily communication with other team members ☆ Building user interfaces with HTML, EJS, React.js, CSS, Material-UI, SASS/LESS ☆Worked with project management tools like Trello and Jira ☆Attended virtual meetings on project reports

Carvan

React Trainee

Carvan

LinkedIn
2021-5 - 2021-7 · 3 mos

Karāchi, Sindh, Pakistan

Design of User Interface with the use of HTML, CSS, and JavaScript library React.js. Also making research to seek solutions to any new problem design of User Interface with the use of HTML, CSS, and React.js. Also making research to seek solutions to any new problem.

Education

Mohammad Ali Jinnah University (MAJU)

Mohammad Ali Jinnah University (MAJU)

LinkedIn

Computer Science

2017 - 2021 · 4 yrs

Syed Ali Haider Rizvi's Contact Information

Email

******@***.com

Phone

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