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Full Stack Lead Architect

Samarik Tech LLCIndia, India

5 days ago

Job description

Role Description

The Full Stack Lead Architect will lead the end-to-end technical architecture, design, and development of a large-scale, cloud-native digital payment platform hosted on AWS . The role requires deep expertise in Next.js, React Native, NestJS, PostgreSQL, Redis, and AWS infrastructure.

You will define the technical roadmap, lead design reviews, oversee code quality, ensure data security and compliance with data sovereignty laws, and mentor a multi-disciplinary engineering team across frontend, backend, and mobile domains.

Key Responsibilities Architecture & Design

Define and document the system architecture for K-Bills, including microservices, APIs, and integrations with M-Pesa, banks, and vendors.
Design scalable backend services using NestJS and AWS ECS / Fargate , ensuring modularity and maintainability.
Oversee frontend architecture for both Next.js (web) and React Native (mobile) apps.
Design and optimize the database schema (PostgreSQL) and caching layer (Redis).
Establish best practices for API design, authentication, and orchestration.

Technical Leadership

Lead a team of full-stack developers, mobile engineers, and DevOps resources.

Conduct architecture reviews, design walkthroughs, and code reviews.

Collaborate closely with the Product Manager, UI / UX team, and QA engineers.

Translate business requirements into scalable technical solutions.

DevOps & Cloud Infrastructure

Oversee setup and configuration of AWS environments (VPC, ECS, RDS, ElastiCache, CloudFront, Route 53, IAM, WAF).

Implement infrastructure as code (Terraform / CDK) and CI / CD pipelines (GitHub Actions).

Establish monitoring, logging, and alerting through CloudWatch and X-Ray.

Ensure 99.5% uptime SLA and seamless auto-scaling for high traffic.

Security & Compliance

Ensure platform compliance with Kenya Data Protection Act and ISO 27001 principles.

Manage IAM roles, KMS encryption, and secure API integrations.

Implement multi-factor authentication, secure session management, and audit logging.

Integration & Payments

Architect integration workflows with M-Pesa (Daraja API) , banks, and vendor systems.

Build robust reconciliation and reporting systems for transaction validation.

Ensure real-time event processing with SQS / SNS and WebSockets for notifications.

Mentorship & Documentation

Mentor junior engineers and provide technical training.

Maintain detailed technical design documents, API specs, and architecture diagrams.

Contribute to technology roadmap and sprint planning.

Technical Skills Required Core Stack

Frontend : Next.js, TypeScript, Tailwind, React Query

Mobile : React Native (Expo), Firebase / FCM

Backend : NestJS (Node.js), TypeScript, ExpressJS, RESTful APIs

Database : PostgreSQL, TypeORM / Prisma ORM

Cache & Queues : Redis, BullMQ, SQS / SNS

CI / CD : GitHub Actions, AWS CodeBuild, Docker, ECR

Infra : Terraform / AWS CDK, ECS Fargate, CloudFormation

Monitoring : CloudWatch, Grafana, X-Ray

Bonus Skills

Microservices & API gateway design

Event-driven architecture with EventBridge

Familiarity with fintech integrations (M-Pesa, card payments)

Multi-language apps (English / Swahili)

Knowledge of Flutterwave or banking APIs

Qualifications

Bachelor’s or Master’s in Computer Science, Software Engineering, or related field.

8+ years of professional full-stack experience.

3+ years in a technical leadership / architect role.

Proven record designing scalable, cloud-native SaaS or fintech platforms.

Deep understanding of security, performance tuning, and DevOps best practices.

Strong communication and stakeholder management skills.

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Lead Architect • India, India

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