I live to code, and pay absolute attention to writing correct and robust programs. As a graduate of Computer Science, I learnt much from helping others, exploring open source, reading professional books and working in my code lab. Having won the best male programmer in my class 1, 2 and class 3, I'm currently being called 'Code' by my colleagues, not to make me feel big, but because they know that i love to code and i know what i do very well. I have worked a lot as a freelancer, but lately, I spend more time working with teams. Experienced in NoSQL databases such as MongoDB and Firebase, the Front-end is one place I always want to be a part of because it is what clients see and requires much attention to details both in the user interface (UI) and the user experience (UX). I build APIs using REST and apply modern web standards in writing software. Worked with startup company, Alta Labs, Meristem, and the LiftHub. Designed various web solutions with the team, some of which are in use by Shuttlers, Kudy Team, CRSG, and the University of Calabar. I work with React, Next.js, Vue, Angular JavaScript, TypeScript, and I can fit into most web based projects, either as a full stack or front-end developer.

I help startups and founders turn ideas into MVPs, SaaS platforms, and AI-powered products built for real users, traction, and scalable growth. As a Full Stack Product Engineer, I specialize in building end-to-end digital products — from idea validation to production deployment. My focus is fast execution, clean architecture, and product-driven engineering decisions. I build systems designed to scale into real, production-ready products with strong performance, reliability, and maintainability. I specialize in fast MVP development with production-ready architecture. ⚙️ What I build • SaaS platforms (multi-tenant, scalable systems) • AI-powered applications (OpenAI / LLM integrations) • MVPs for startups • Mobile apps (iOS & Android) • Backend systems & APIs • Full-stack web applications 🧠 How I work • Understand your idea and business goals • Design scalable system architecture • Build fast MVP iterations • Deploy production-ready products • Optimize for performance and scale 🚀 Why founders work with me • Focus on real product outcomes, not just code • Experience in SaaS, AI, and mobile product systems • Strong product + engineering mindset • Fast execution from idea → MVP • Reliable long-term technical partner 🧰 Tech Stack React • Next.js • Node.js • TypeScript • React Native • Flutter • Firebase • PostgreSQL • MongoDB • Docker • REST APIs • OpenAI / LLM APIs

Struggling to launch or scale your Apple-native app without technical debt? My name is Seraphim, a Senior iOS Developer with 𝟏𝟎+ 𝐲𝐞𝐚𝐫𝐬 experience, having shipped 𝟐𝟎+ 𝐡𝐢𝐠𝐡-𝐪𝐮𝐚𝐥𝐢𝐭𝐲 𝐚𝐩𝐩𝐬 across iOS, macOS, and watchOS that are fast, polished, and seamlessly integrated into the Apple ecosystem. 📱 𝐇𝐎𝐖 𝐈 𝐂𝐀𝐍 𝐇𝐄𝐋𝐏 𝐘𝐎𝐔 𝐄𝐧𝐝-𝐭𝐨-𝐄𝐧𝐝 𝐢𝐎𝐒 𝐀𝐩𝐩 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 • Building high-quality native apps for iPhone, iPad, Apple Watch, and Mac with clean, scalable code. 𝐀𝐩𝐩 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞 & 𝐂𝐨𝐝𝐞𝐛𝐚𝐬𝐞 𝐑𝐞𝐯𝐢𝐞𝐰𝐬 • Expert guidance on architecture, code quality, and technical debt reduction for existing projects. 𝐒𝐰𝐢𝐟𝐭𝐔𝐈 & 𝐔𝐈𝐊𝐢𝐭 𝐔𝐬𝐞𝐫 𝐈𝐧𝐭𝐞𝐫𝐟𝐚𝐜𝐞𝐬 • Designing Apple-native, polished UX strictly following Human Interface Guidelines. 𝐀𝐩𝐩 𝐒𝐭𝐨𝐫𝐞 𝐒𝐮𝐛𝐦𝐢𝐬𝐬𝐢𝐨𝐧 & 𝐂𝐨𝐦𝐩𝐥𝐢𝐚𝐧𝐜𝐞 • Handling app deployment, store compliance, localization, and accessibility support. 𝐀𝐝𝐯𝐚𝐧𝐜𝐞𝐝 𝐅𝐞𝐚𝐭𝐮𝐫𝐞𝐬 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 • Implementing Apple Pay, in-app purchases, Firebase, and companion app support for watchOS and macOS. ============================ 🌟 𝗪𝗛𝗔𝗧 𝗖𝗟𝗜𝗘𝗡𝗧𝗦 𝗦𝗔𝗬 🌟 ❝Working with Seraphim has been an absolute pleasure. His iOS development skills are top-tier—precise, efficient, and consistently reliable. He delivered high-quality work, communicated clearly, and always approached challenges with a problem-solving mindset. We feel incredibly lucky to have had the opportunity to work with him and would gladly do so again. Highly recommended for any iOS project.❞ – Client ❝Seraphim is an absolute stud. He single-handedly built our app, and took it from concept to production in a matter of months, serving tens of thousands of users. Beautiful attention to detail, and a huge joy to have on the team. He cares deeply about his work and teammates, is a true professional, and stays up-to-date with the latest in iOS. You'd be stupid not to hire Seraphim.❞ – Client ❝Seraphim was phenomenal to work with. He took over for a prior developer and immediately picked up where the project left off, without a hitch. His expertise in Swift and iOS development is second-to-none, and I am in constant awe of the solutions he's produced to solve the unique challenges I've sent his way. He met all deadlines I set while being very communicative of progress. Seraphim was always quick to hop on a conference call to discuss any problems I ran into, and was patient with me through to the end. It was a pleasure working with him, and I am eager to work with him again in the future.❞ – Client ============================ ============================ 🤝 𝗟𝗘𝗧'𝗦 𝗕𝗨𝗜𝗟𝗗 𝗬𝗢𝗨𝗥 𝗔𝗣𝗣 Have an iOS project or need expert advice? 𝗠𝗲𝘀𝘀𝗮𝗴𝗲 𝗺𝗲 𝗼𝗻 𝗨𝗽𝘄𝗼𝗿𝗸 𝘁𝗼𝗱𝗮𝘆 for a free consultation and clear path to a polished Apple-native app. I typically respond within 6 hours and prioritize timely, professional communication. ============================ 🛠️ 𝐓𝐎𝐎𝐋𝐒 & 𝐓𝐄𝐂𝐇𝐍𝐎𝐋𝐎𝐆𝐘 𝐋𝐚𝐧𝐠𝐮𝐚𝐠𝐞𝐬 & 𝐅𝐫𝐚𝐦𝐞𝐰𝐨𝐫𝐤𝐬 • Swift • SwiftUI • UIKit • Combine • SwiftData • ARKit • Vision 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬 • iOS • iPadOS • macOS • watchOS 𝐓𝐨𝐨𝐥𝐢𝐧𝐠 & 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐲 • Xcode • Git • Fastlane • TestFlight • Firebase • Jenkins (CI/CD) 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞 & 𝐐𝐮𝐚𝐥𝐢𝐭𝐲 • MVVM • TCA • VIPER • Coordinators • Protocol-Oriented Programming • XCTest • Swift Package Manager (SPM) 𝐀𝐩𝐩 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 & 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬 • StoreKit • Apple Pay • In-App Purchases • RESTful API • Localization & Accessibility 𝐏𝐫𝐨𝐣𝐞𝐜𝐭 & 𝐑𝐞𝐥𝐞𝐚𝐬𝐞 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭 • App Store submission • CI/CD pipelines • Code review • Technical debt management iOS Development, Swift, SwiftUI, UIKit, WatchOS, Core Data, StoreKit, Firebase, Apple Xcode, Mobile App Development, AI and Agentic coding, Claude Code

I help founders and growing companies design, build, stabilize, and scale SaaS products, AI-enabled applications, and business-critical software platforms. My work combines fractional CTO leadership with hands-on architecture and engineering. I can help shape the technical strategy, design the system, build critical components, guide the development team, and remain accountable for the quality of the final product. Clients typically bring me in when they need to: • Turn an idea, prototype, or internal tool into a production-ready product • Add AI capabilities to an existing SaaS platform or business workflow • Architect a new SaaS product with a secure and scalable foundation • Stabilize, modernize, or take ownership of an existing application • Audit a codebase, cloud environment, or third-party development effort • Design APIs, integrations, automation, and event-driven workflows • Improve software security, reliability, maintainability, and performance • Gain experienced technical leadership without hiring a full-time CTO AI-ENABLED PRODUCT DEVELOPMENT I help companies apply AI where it creates practical product or operational value. This may include: • LLM integrations using platforms such as OpenAI, Claude, and Gemini • AI agents and agentic workflows • Retrieval-Augmented Generation and private knowledge systems • AI-powered SaaS features • Document processing and information extraction • Internal AI tools and workflow automation • API and tool integrations for AI systems • Architecture for secure, observable, and maintainable AI applications An AI demonstration can be assembled quickly. The harder part is turning it into dependable software that handles real users, business rules, permissions, sensitive information, integrations, failures, and ongoing product changes. That production foundation is where my broader architecture and engineering experience adds the most value. SAAS, CLOUD, AND SYSTEM ARCHITECTURE I specialize in systems that need to remain reliable as their users, features, data, integrations, and operational complexity increase. My work commonly involves: • Multi-tenant SaaS architecture • AWS cloud infrastructure • TypeScript, Node.js, React, and Next.js • Serverless and containerized applications • REST APIs, WebSockets, and event-driven systems • SQL, NoSQL, DynamoDB, and relational databases • Infrastructure as Code with Terraform and CloudFormation • Authentication, authorization, and identity integrations • Third-party APIs and business-system integrations • CI/CD, deployment automation, testing, and observability • Security-sensitive and compliance-aware applications SELECTED EXPERIENCE • Architected and implemented a HIPAA-aware, multi-tenant SaaS platform involving AWS infrastructure, connected devices, event-driven services, identity, authorization, APIs, and sensitive healthcare data. • Led development work for a business-critical enterprise platform used by a Fortune 50 organization. • Helped build a fintech product from the ground up, contributing across architecture, implementation, integrations, infrastructure, and product development. • Delivered a turnkey e-commerce platform integrated with a retailer’s point-of-sale and operational systems. • Designed AWS-native applications using Lambda, ECS Fargate, API Gateway, EventBridge, SQS, DynamoDB, Cognito, Terraform, CloudFormation, and other cloud services. • Supported long-running engagements requiring technical leadership, hands-on engineering, product ownership, and clear communication with both technical and nontechnical stakeholders. HOW I WORK I approach software as a complete product and operating system, rather than a collection of isolated tickets. That means thinking carefully about: • Product and business requirements • System boundaries and data flows • Security and access-control risks • Failure modes and operational visibility • Maintainability and future development • Infrastructure and deployment practices • The tradeoffs between speed, cost, and long-term quality I communicate directly, surface risks early, and explain technical decisions in practical language. My goal is to give clients a clear understanding of what is being built, why it is being built that way, and what decisions will matter as the product evolves. WHO DOES THE WORK? I personally lead architecture, technical strategy, client communication, and critical implementation. For projects that benefit from additional capacity, I can bring in trusted engineers from my team while remaining directly responsible for system design, technical quality, and delivery. You will always know who is working on the project and how responsibilities are divided. UPWORK TRACK RECORD • 100% Job Success • 5.0 client rating • 5,700+ hours completed on Upwork • Successful short-term projects and multi-year client relationships If you need someone who can

I build AI agents and autonomous agentic systems that complete multi-step tasks without hand-holding. RAG systems that let your users query private documents, databases, or knowledge bases accurately. LLM apps built on OpenAI, Anthropic Claude, Gemini, or open-source models, fine-tuned and prompt-engineered for your use case. Voice agents and voice AI products. Full-stack web applications with Python, Golang or Node.js backends and React/Next.js frontends. Machine learning models for NLP, classification, and prediction. API integration that connects your AI layer to CRMs, databases, and third-party services. AI chatbots for support, sales, and internal workflows. A few use cases: ⏵ AI Agents -- multi-agent pipelines, autonomous task systems, tool calling, MCP, orchestration ⏵ RAG Systems -- document retrieval, knowledge base search, structured outputs, cited answers ⏵ LLM Apps -- prompt engineering, LangChain, LlamaIndex, LangGraph, CrewAI, fine-tuning workflows ⏵ Voice Agents -- call handling, lead qualification, live transfer, conversation summarization ⏵ Document Intelligence -- PDF, invoice, contract, legal/medical and form extraction into structured data ⏵ Full-Stack AI Development --- Python, Node.js, React, Next.js, REST APIs, cloud deployment ⏵ AI Integration -- API integration, webhooks, Sheets, Airtable, Make, Zapier, Slack, CRMs, ERPs, payment flows ⏵ Languages and frameworks: Python, JavaScript, React, Next.js, Node.js, Bunjs, LangChain, LangGraph, PyTorch, TensorFlow. Infrastructure: AWS, Supabase, Pinecone, Weaviate, Redis. I use n8n or Make when a workflow tool is genuinely the right choice and never as a substitute for real engineering. ⋞▬ HOW I WORK ▬▬⮞ No mystery work. No polite silence while something burns. No pretending a demo is production. Async communication that respects your timezone. Client work comes first. Risks surface early. I explain decisions in plain English. Systems are built to stay maintainable after handoff. If the miss is on me, I fix it, reduce the invoice, or refund - I would rather lose money than pretend something landed when it clearly did not. Even your rough idea for mvp AI agent and RAG projects regularly move from spec to production in under 48 hours. Speed matters. But only if the system still works when real people start clicking buttons and ignoring instructions. Most of my clients are looking for a long-term engineering partner, not a one-off contractor - I'm built for that relationships so If you are building something with LLMs, AI agents, or RAG and need an AI engineer who delivers and stays accountable, drop a message!

Top Rated Unity 3D Developer with 10+ years of expertise. I engineer, optimize, and publish highly performant games for mobile, PC, and console.

I specialize in turning complex backend systems into stable, scalable production infrastructure. I’m a Backend & Cloud architect (12+ years) with hands-on experience in DevOps, applied AI/LLM, high-load APIs and Databases in live production web environments. Hand-on: Architecture → Implementation → Deployment → Stability → Scale Comfortable starting from scratch or diving into existing codebases across the stack. Projects I delivered: ▸Building backend & cloud for high-impact web platforms ▸Applying AI/LLM in real-world backend platforms (RAG pipelines, workflows, logic) ▸Deep DevOps work — CI/CD, observability, scalability, and cloud cost ▸Productionize PoC / Scaling MVP ▸Stabilizing critical systems ▸Consulting on system architecture, structure, and ownership ▸Developing and deploying systems in live environments ▸Reinforcing teams under delivery or tight timelines ▸Validating ideas and tech-stack Contact me to discuss your project and how I can contribute. TECH Stack: ▪ Backend — Python · FastAPI · Pydantic · Node.js · PHP · Microservices · Event-Driven Architectures · Proxies · Scrapers · Batch Scripts ▪ Cloud — AWS · Lambda · Lambda@Edge · API Gateway · SQS/SNS · ECS · EC2 · Auto Scaling · VPC · NAT · CloudFront · Elastic Beanstalk · DigitalOcean · Docker · CUDA Docker Containers ▪ DevOps — Custom CI/CD Pipelines · team-aligned · culture-driven · AWS CDK · IaC · Deployment Automation · Canary Deployments · proxy-based · Lambda@Edge · routing & load balancer policies · Release Workflows ▪ Observability — CloudWatch · X-Ray · Grafana · Elastic Stack · OpenSearch / Kibana ▪ Data — PostgreSQL · MySQL · DynamoDB · Redis · Neo4j · Milvus ▪ Analytics & BI — Athena · Superset · QuickSight · Elastic Stack ▪ Performance — NGINX · Apache · Linux HTTP Server Configuration · Reverse Proxies · Advanced Caching Layers · source-level · server-level · CDN-integrated · CloudFront · Cloudflare ▪ Applied AI/LLM — Integrations · Agents · RAG Pipelines · Deterministic AI · Workflows · Logic ▪ Frontend — React · Vue · Streamlit

🔹 100% Job Success 🎖️ Glide Certified 🎖️ NoLoCo Certified 🚀 Expertise: Client Portals, Internal Apps, Marketplaces 🚀 Specialized in: Airtable, CRM design, Business process optimization 🚀 Tailored NoCode Solutions Tools Used: ⚡ Airtable ⚡ Stacker ⚡ Glideapps ⚡ Zapier ⚡ Integromat / Make How I work: 🎯 Identifying Goals: Collaborating to identify project goals, constraints, and requirements. ⚒️ Tool Recommendations: Assessing project requirements and suggesting optimal tools for functionality. 🚧 Task Prioritization and Implementation: Working closely to prioritize tasks and create a roadmap for timely completion. 📋 Comprehensive Documentation: Documenting workflows, configurations, and customizations. I have successfully implemented and customized NoCode/LowCode solutions for diverse business needs, ranging from eCommerce, CRM, Internal Apps, business process optimization. My background and experience center around leveraging technology to streamline business processes and drive operational excellence. With a master's degree in Computer Science, I have cultivated a deep understanding of various aspects, including database design, workflow automation, scripting, AI, API integration and reporting. I prioritize clear communication, timely task completion and comprehensive documentation. 🏆 Let's work together to achieve your project's success!

As a Fractional CTO, I partner with founders and executive teams to bridge the gap between commercial vision and technical execution. Software and platforms I have architected are currently utilised by organisations including the NHS, Aston Martin, Vodafone, GSK, Experian, National Grid and more. My approach is rooted in firsthand experience across the entire product lifecycle. Before building and scaling my own B2B and B2C SaaS companies as a founder, my background spanned senior development, solution architecture, and UI/UX design. Because I have operated at every level of a tech company, I know what excellent execution looks like, how long it should take, and how to align it directly with your business goals. Today, my focus is entirely on technical leadership and strategy. My engagements typically begin with a deep dive into your business: assessing requirements, analysing data, and defining a clear, actionable roadmap. Once the strategy is signed off, I organise the necessary resources and lead the project through to successful deployment. I am completely flexible in how we execute. I can step in to provide structure and leadership to your existing development team, or I can bring in my own, proven, world class, end-to-end product team. This includes senior developers (ex-Google), cloud infrastructure engineers (ex-Serverpod), Senior UI/UX designers (ex-Dept) who have collectively worked on some of the largest products on the planet (Spotify, Google Firebase, The Claridge's Website). If you are looking for an experienced technical partner with an eye for detail to assess your needs, define the plan, and lead the execution from the front, let’s connect.

SENIOR UNITY ENGINEER (C#) | 8+ Years Experience | 20+ Shipped Titles Credits: Netflix, The Walking Dead, RWBY, Synth Riders, Merge Tales I help studios and startups ship polished Unity products, not fragile prototypes. I specialize in PC, console, WebGL, VR/AR, and mobile development with a strong focus on gameplay systems, multiplayer, optimization, backend-connected Unity clients, and production architecture. Whether you need a lead engineer to structure a complex game, a specialist to stabilize performance, or a senior developer to push a build across the finish line, I bring clean execution, strong ownership, and real shipped-product experience. FEATURED WORK ▪ Commercial Games & Apps ▸ Mole Gem Mayhem (Netflix) ▸ Merge Tales ▸ Road Redemption ▸ The Walking Dead: Last Mile ▪ VR, AR & Console ▸ Synth Riders (VR, Apple AR & Console) ▸ RWBY: Arrowfell ▸ The Mage’s Tale PSVR ▸ NCIS VR Prototype ▸ Spark Magic AR Golf / AR Karts ▪ Lead Engineering & Connected Platforms ▸ TerraZero ▸ Doctor-led WebGL cognitive game platform ▸ Dime Arcade Basketball WebGL platform ▪ Simulation & Enterprise ▸ ExxonMobil VR Training Modules ▸ Military Radar Simulation ▸ Car Training Simulation ▸ Real Estate VR Visualization WHY CLIENTS HIRE ME I bring senior-level ownership, clear communication, and production discipline to every project. I understand budget pressure, delivery risk, and the cost of messy systems, so I focus on clean execution, maintainable architecture, and shipping without creating technical debt that slows the team down later. ▪ Senior Ownership: I can lead architecture, implementation, optimization, and delivery without needing hand-holding. ▪ Production Experience: 20+ shipped titles across mobile, WebGL, PC, console, VR/AR, and enterprise simulation. ▪ Clean Systems: Gameplay architecture, reusable state flows, backend integration, Addressables, tools, and scalable C#. ▪ Performance Focus: Mobile, WebGL, VR, and console optimization with real release constraints. ▪ Team Fit: Clear updates, async communication, review-ready handoffs, and strong collaboration with design, art, backend, QA, DevOps, and production. TECHNICAL EXPERTISE ▪ Engines: Unity, C#, Unreal Engine ▪ Platforms: WebGL, PC, iOS, Android, Console, VR/AR/XR ▪ Multiplayer: Photon, Mirror, Fusion, Unity Netcode ▪ Backend: PlayFab, Firebase, AWS, REST APIs, WebSocket flows ▪ Unity Systems: Addressables, ScriptableObjects, UI, input, animation, tooling, build pipelines ▪ Optimization: Profiler, Memory Profiler, asset size reduction, runtime performance, WebGL stability ▪ Workflow: GitHub Actions, Unity Automation, CI/CD, Jira, Slack, Plastic SCM, GitHub Currently open to Unity contract work, technical lead roles, and production support for teams that need someone who can move fast without making a mess.