Valerian Amutaeme

Mobile Engineer @ StoneCircle by Limestone

About

I build backend systems and full-stack products that handle real money, real users, and real scale.Over 6 years, I've shipped fintech platforms, distributed microservices, real estate apps, marketplaces, and e-commerce products, working across the full stack from React Native frontends to event-driven NestJS/Django backends on AWS.What I've delivered:→ Systems processing 100,000+ concurrent transactions with 98% uptime→ A fintech admin dashboard managing $1M+ in payroll and loan operations for 20,000+ employees→ API latency reduced by up to 50% across multiple production systems→ A React Native real estate platform serving thousands of residents daily (rent, maintenance, bookings, community)→ 10+ client websites built from scratch at Corewaves Media; full-stack, production-ready→ $10K+ in software delivered across a portfolio of 15+ projectsDomains I've worked in:Fintech (wallets, salary advances, loans, KYC/AML, virtual accounts, ledger systems)Proptech (IoT access control, resident management, microservices)Marketplaces & HR techFood tech, travel booking, e-commerce, learning platformsMy stack:Backend — Node.js · NestJS · Python · Django · TypeScript · REST APIs · RabbitMQ · NATS · RedisFrontend — React.js · React Native · Next.js · TypeScript · Tailwind CSSCloud & DevOps — AWS (EC2, S3, Lambda) · Docker · GitHub Actions · PostgreSQLPatterns — Microservices · Event-driven architecture · Domain-driven design · CI/CDI'm the engineer you bring in when the system needs to work under pressure, scale without breaking, and be built properly the first time.I studied Medical Parasitology at Nnamdi Azikiwe University, and taught myself to code during university. That scientific training sharpens how I debug, architect, and think through systems at a root-cause level.Open to:✔ Senior full-stack or backend engineering roles (remote)✔ Freelance and contract projects✔ Fintech, proptech, marketplace, and SaaS teamsDM me "HIRE" and let's talk.

Country

City

United States

Industry

Computer Software

Skill

KYC Verification, User Experience Design (UED), User Interface Design, Back-End Web Development, Interactive Web, Visual Interdev, Software Infrastructure, Internet Software, Visual Web Developer, Leadership, Mobile Applications, React Native, E-Commerce, Web Infrastructure, Automation, Google Kubernetes Engine (GKE), Prometheus.io, REST APIs, Jenkins, Gitlab

Experience

Mobile Engineer

StoneCircle by Limestone

2025-12 - Present · 10 mos

Nigeria

Built and shipped a full-featured React Native application for a real estate company managing thousands of estate residents. The platform consolidates rent payments, maintenance request tracking, amenity bookings, and community communication into a single mobile experience — replacing fragmented manual processes. Key contributions: → Architected and developed the entire mobile application from scratch using React Native → Integrated multiple operational modules: payments, maintenance workflows, booking systems, in-app messaging → Delivered a production-ready app actively serving thousands of residents daily → Built on top of Limestone's distributed microservices backend (identity, payments, notifications) → Led the project end-to-end from scoping through deployment and ongoing support Stack: React Native · JavaScript · TypeScript · REST APIs · Git

Contract Full-Stack Developer

Corewaves Media

2025-4 - Present · 1 yr 6 mos

April 2025 – Present · Remote Delivering full-stack web development across a portfolio of client projects, building production-ready websites and web applications from scratch. Key contributions: → Built 10+ client websites end-to-end — from architecture and backend to frontend and deployment → Worked across diverse industries including media, services, and e-commerce → Handled full project lifecycle: requirements gathering, design implementation, backend APIs, deployment → Maintained clean, well-documented codebases built for handoff and long-term maintainability Stack: React.js · Next.js · Node.js · Python · Tailwind CSS · PostgreSQL · AWS · Git

Frontend Engineer (NYSC Placement)

RopeAfrica

2025-1 - 2025-12 · 1 yr

Lagos

Worked across frontend and backend engineering during my NYSC year, contributing to three live fintech and HR products: AISA Enterprise, PentaHR, and FlexR. Key contributions: → Led UI development for AISA Enterprise, PentaHR, and FlexR — building real-time dashboards and secure authentication flows → Reduced API latency by up to 50% through optimised API consumption and backend query improvements → Contributed to scalable fintech backend systems supporting salary advances, loans, and virtual accounts → Supported microservice architectures with automated credit workflows and KYC/AML compliance pipelines → Helped maintain systems handling 100,000+ concurrent transactions with high availability Highlight — FlexR Admin Dashboard: Built a real-time operations dashboard for payroll and loan management that manages $1M+ in financial transactions, supports 20,000+ employees, and reduced API calls by over 90%. Stack: React.js · TypeScript · Node.js · NestJS · RabbitMQ · PostgreSQL · AWS · Docker · GitHub Actions

Full Stack Engineer

Xelaware

2020-6 - 2024-3 · 3 yrs 10 mos

Awka

Spent nearly 5 years as a core engineer, designing and shipping web and mobile products for clients across e-commerce, food tech, lifestyle, and professional services. Key contributions: → Delivered 10+ client projects end-to-end including JaraEats, CuteKids, Favrals, AlexisKatty, and the Xelaware platform → Designed scalable REST APIs handling 10,000+ monthly transactions → Improved API response time by 25% and reduced system downtime by 40% through cloud database engineering → Reduced system bugs by 30% using CI/CD pipelines → Improved overall user performance by 40%+ through architecture and front-end optimisation → Led backend modernisation: modular system design, queue systems, logging, and fault-tolerant patterns → Built and maintained billing, payment, and integration services across multiple products → Conducted code reviews and maintained engineering standards across the team Stack: Python · Django · React.js · JavaScript · Node.js · HTML · CSS · AWS · PostgreSQL · Git