Available for senior engineering roles

Sidney Manuel

Senior Software Engineer · Full Stack & Systems Integration Specialist

5+ years designing, building and integrating mission-critical platforms for governments, municipalities, fintech and live streaming ecosystems.

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Years of experience

10+

Production platforms

Industry domains

About

Engineering systems people actually rely on

Software Engineer with more than 5 years of experience designing, developing, integrating, maintaining and evolving digital solutions across government institutions, municipalities, fintech initiatives, GIS ecosystems, USSD platforms, live streaming infrastructures and enterprise applications.

Active participant in the delivery of mission-critical systems that support real-world operations, financial transactions, municipal processes, citizen services, geospatial management and digital transformation initiatives.

Expertise spans the complete software development lifecycle — from requirements and architecture to backend, frontend, mobile, API integrations, deployment, monitoring and continuous improvement.

Platforms used by municipalities at national level
Financial workflows, payments and revenue systems
Interoperability across independent government systems
Live streaming ecosystems for web and mobile audiences

Selected work

Real systems, measurable impact

Each project below solved a concrete business problem. Tap in to see the architecture decisions, technologies and outcomes.

eSTM Ecosystem

Government · Municipal

JavaSpring BootPostgreSQLREST APIsMicroservices

Business problem

Municipal services were fragmented across legacy tools, slowing down operations and citizen support.

Solution designed

Continuous evolution of the integrated eSTM platform — new features, service integrations, workflow optimization and long-term maintenance.

Role

Senior Engineer · Maintenance & Evolution

Technical challenges

Modernizing a live platform without disrupting active municipal operations, while integrating new services and improving performance.

Impact achieved

Direct contribution to the digital transformation of municipal processes used by public institutions.

Municipal Registration Platform

Mobile · GIS · Field Ops

FlutterJavaSpring BootPostgreSQLGoogle MapsGIS

Business problem

Municipalities needed field agents to register citizens, draw plots and collect fees with reliable offline-tolerant tooling.

Solution designed

Cross-platform mobile app with geolocation, polygon drawing on maps, GIS integrations and fee/emolument processing.

Role

Full Stack Engineer · Mobile + Backend

Technical challenges

Reliable map polygon capture in the field, data synchronization, and integration with municipal financial workflows.

Impact achieved

Faster field operations, better data quality and digital coverage of municipal procedures.

USSD Platform (*744#)

Fintech · Digital Inclusion

GoJavaPostgreSQLPayment GatewaysUSSD

Business problem

Citizens without smartphones were excluded from digital municipal services and payments.

Solution designed

USSD platform enabling municipal fee and emolument payments, service consultations and financial transactions from any basic phone.

Role

Backend & Integrations Engineer

Technical challenges

Designing low-latency, session-based flows over USSD while keeping financial transactions consistent and auditable.

Impact achieved

Extended digital municipal services to citizens beyond smartphone users.

Municipal Georeferencing Interoperability

GIS · Systems Integration

JavaSpring BootPostgreSQLGISREST APIs

Business problem

Municipal management systems and georeferencing systems at the Municipality of Beira operated in isolation.

Solution designed

Interoperability layer with API integrations and reliable data exchange mechanisms between both ecosystems.

Role

Integrations Engineer · Local & International Teams

Technical challenges

Aligning data models across independent teams and ensuring consistent geospatial data exchange.

Impact achieved

Unified municipal and geospatial information used by multiple stakeholders.

Kllipz Live Streaming Platform

Streaming · Real-Time · Multi-Channel

Dolby.ioWebRTCReactReact NativeNode.jsOBS

Business problem

Creators needed a unified multi-camera live streaming workflow across Android, iOS and Web with professional mixing.

Solution designed

Multi-channel live streaming ecosystem with Dolby.io, OBS integration, video source switching and integrated mixing workflows.

Role

Engineer · Streaming Integrations

Technical challenges

Real-time video distribution, source switching and reliable broadcasting across mobile, web and external software.

Impact achieved

End-to-end content capture, transmission and audience consumption across platforms.

eGarantias Platform

Fintech · Insurance

Spring BootPostgreSQLReactREST APIs

Business problem

Guarantee issuance involving applicants, brokers and insurance companies relied on slow manual processes.

Solution designed

Digital platform with multi-party workflows, document management and approval flows.

Role

Full Stack Engineer

Technical challenges

Modeling multi-party approval workflows and passing formal validation processes.

Impact achieved

Successfully validated and contributing to digital transformation in the insurance sector.

Savings & Community Finance Platform

Fintech · USSD · Community

JavaGoPostgreSQLUSSDPayment Integrations

Business problem

Communities needed accessible tools to organize savings groups and lend internally.

Solution designed

Savings platform with group savings, internal lending, credit requests and interest distribution — delivered through USSD.

Role

Backend Engineer

Technical challenges

Fair interest distribution logic and certification-grade reliability over USSD.

Impact achieved

Successfully completed validation and certification; empowering community finance.

Orthodontic Benefits Management

Enterprise · Benefits

LaravelPHPMySQLReact

Business problem

Employers, employees and clinics lacked a single system to coordinate orthodontic benefits.

Solution designed

Platform for benefits administration, monthly payments, eligibility and clinic access workflows.

Role

Full Stack Engineer

Technical challenges

Eligibility, waiting periods and corporate administration across multiple stakeholders.

Impact achieved

Simplified operations between employers, employees and clinics.

Architecture & Systems Design

Designing ecosystems, not just apps

Senior-level experience designing, integrating, scaling and evolving complex digital ecosystems used by organizations and institutions.

Enterprise Systems

Long-lived business platforms with strong domain modeling and operational reliability.

Systems Integration

Connecting independent government, financial and operational systems through robust APIs.

GIS Platforms

Geospatial systems, polygon mapping and georeferencing interoperability.

Microservices

Email, SMS, notifications, payments, authentication and integration services.

Live Streaming Infrastructure

Multi-camera capture, real-time distribution and broadcasting workflows.

Financial Systems

Payments, municipal revenue, savings, lending and certified financial workflows.

USSD Platforms

Session-based services reaching citizens on any mobile phone.

API Ecosystems

Well-designed contracts powering mobile, web and partner integrations.

Real-Time Communication

WebRTC, streaming and event-driven workflows for live experiences.

Technical depth

Skills & toolchain

Languages

JavaGoPHPPythonDartJavaScriptTypeScriptSQL

Frontend

FlutterReactReact NativeHTMLCSSBootstrapTailwind CSS

Backend

Spring BootDjangoLaravelNode.jsREST APIsMicroservices

Databases

PostgreSQLMySQLSQLite

GIS

Google MapsGeospatial SystemsPolygon MappingGIS Integrations

Streaming

Dolby.ioWebRTCOBSLive Streaming Architectures

Infrastructure

DockerLinuxNginxCI/CDVPS ManagementSystem Integrations

Certifications

Certified in Text Recognition (OCR) with Python — OCR, Computer Vision fundamentals, text extraction and document automation.

Contact

Let’s build something durable

Senior Software Engineer | Full Stack & Systems Integration Specialist — open to senior engineering roles, technical leadership and complex integration projects.

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