Languages & tools
TypeScript, Next.js, React Native, NestJS, Node.js, Git.
Kilamba Kiaxi, Luanda, Angola
Joel Sebastião Mbengui
jsmbengui
Software Engineer
I'm a Software Engineer with 6 + years of experience building backend and full- stack systems for financial institutions and technology platforms in Angola.
Professional profile
I'm a Software Engineer with 6 + years of experience building backend and full- stack systems for financial institutions and technology platforms in Angola.
My stack centres on TypeScript, NestJS, and AWS — with deep experience in event-sourcing, DDD, and distributed systems. I'm also a three - time ACM - ICPC competitor(2017–2019), which shaped the way I think about complex problems. I write about backend engineering, financial systems, and software architecture.Fluent in Portuguese and English.
Skills & technologies
Databases
PostgreSQL, MySQL, Microsoft SQL Server.
Cloud & infrastructure
AWS (EKS, RDS, IAM, Route53), Kubernetes, Docker.
Messaging & search
ElasticSearch, RabbitMQ, Kafka.
Methodologies & patterns
TDD, DDD, SOLID, Hexagonal Architecture, Microservices, Event-Sourcing, continuous integration.
Work experience
Banco de Poupança e Crédito (BPC), Luanda
Software Engineer
- Developing backend solutions to modernise and optimise core banking operations.
- Integrating financial systems with focus on security, resilience, and scalability.
- Working across multidisciplinary teams to deliver solutions aligned with the bank's strategic roadmap.
Bulir Technology, Luanda
Software Engineer
- Built the backend for bulir.com, a freelancer recruitment platform, using a microservices architecture.
- Applied TDD and DDD practices throughout, delivering maintainable, production-grade code.
Sirius, Luanda
IT Manager
- Led IT project delivery, coordinating technical teams and managing stakeholder relationships.
- Introduced processes that improved on-time, on-budget delivery across projects.
- Drove adoption of modern technologies to streamline internal operations.
Freelancer
Software Engineer
- Built custom backend systems and APIs for clients across various industries.
- Handled end-to-end delivery: requirements, architecture, implementation, and maintenance.
MochiLab, Luanda
Software Developer
- Contributed to internal and client-facing systems, including projects for Medicare Angola.
- Built an advanced admin dashboard with interactive data visualisations, focused on performance and usability.
Relevant projects
Projects with context, role, and technologies.
Vota ANCAF →
Online voting system for the National Football Association of Angola. Built the backend with a focus on data integrity, security, and scalability. Implemented responsive interfaces following WCAG accessibility standards.
Contribution: Backend, security, scalability, and responsive interfaces (Tailwind CSS, WCAG).
NestJSPostgreSQLTailwind CSSStyled Components
FeiraJovem →
SaaS platform built by young Angolans delivering digital solutions to businesses. Contributed backend APIs and relational database integrations.
Contribution: APIs and relational database integration.
TypeScriptNestJSPostgreSQL
Medicare — Admin Dashboard
Advanced monitoring and analytics dashboard for Medicare Angola, developed at MochiLab. Delivered interactive visualisations and system integrations with a focus on performance.
Contribution: Dashboard development focused on performance and usability.
ReactNode.jsPostgreSQL