Senior Backend Cloud Engineer

Systemsbuilt forserious volume.

I am Alejandro Carvajal, a senior backend cloud engineer building event-driven platforms, secure REST APIs, and distributed workflows across tax, fintech, energy, and commerce sectors.

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Animated high-volume event-driven checkout flow from client through gateway and orders, through an outbox and event bus, to billing, fulfillment, and an idempotent ledger.

35%cloud cost reduction
90%+automated test coverage
7years shipping backend systems
5domains across fintech, tax, energy, commerce

What I build

Distributed backend architecture with clean contracts and measurable outcomes.

Event-driven systems

Kafka, RabbitMQ, SQS, Temporal, Saga, Outbox, idempotency, and resilient message flows.

Cloud architecture

AWS ECS Fargate, S3, Aurora, RDS, deployment integration, and cost-aware elasticity.

Secure APIs

JWT, RBAC, OAuth, OIDC, SSO, contract-heavy request mapping, and service boundaries.

Backend delivery

Java, C#, TypeScript, Spring Boot, .NET, Node.js, NestJS, Express, and modular design.

Experience

From transaction-heavy platforms to workflow automation that holds up in production.

2026

Senior Software Engineer

Munch / startup

Working on the real-time and workflow foundations of an early-stage gastrotech startup, shaping AI-ready service boundaries and dependable product experiences as the idea moves quickly.

Temporal / Kubernetes / WebSockets / TypeScript
2025

Senior Software Engineer

Electronic Tax Systems

Built secure tax-exemption APIs, contract mapping flows, and hexagonal XML-to-JSON integrations for Vertex O Series.

C# / .NET / EF Core / JWT / RBAC
2023-2024

Software Engineer

Fiserv

Delivered chargeback automation with event correlation, safer rollouts, smoke checks, and TDD around dispute workflows.

Java 21 / Spring Boot / Kafka / Temporal / AWS
2022-2023

Software Engineer

Frontera Ingenieria

Hardened API gateway patterns, OAuth-aligned security, pub/sub workflows, retries, Outbox, and Saga orchestration.

Java 17 / Spring Cloud / RabbitMQ / Kafka
2021-2022

Software Engineer

Yuxi Global

Built multi-region services and backend foundations for distributed client platforms.

ASP.NET / Spring Boot / SQL Server / Node.js
2020-2021

Software Engineer

Valid

Optimized SQL Server procedures and introduced correlation IDs to make service behavior easier to trace and support.

ASP.NET / SQL Server / REST APIs
2018-2019

Software Engineer

Digimarketing

Shipped REST reporting APIs and backend integrations that turned operational data into usable reporting workflows.

Spring Boot / Node.js / REST APIs

Beyond the stack

Munch is an early bet on the next interface between intelligence, culture, and the table.

Munch / concept in progress

Gastrotech has a frontier because it barely has a name.

Munch is my long-view exploration of what happens when food, software, and human context are designed together. The goal is not to automate the soul out of the experience, but to make discovery, personalization, and participation feel more alive.

AI is moving from a tool we consult to a layer inside how we make, choose, and experience things. I want to be part of the pioneering work that connects that intelligence with taste, hospitality, and culture.

foodcontextculture
dataAI
MUNCH
01

Define the field

Gastrotech is not a fixed category yet. That ambiguity leaves room to shape the term through real products and useful rituals.

02

Build the bridge

Recommendation, logistics, kitchens, commerce, and sensors are already moving. Munch brings those threads into one experience.

03

Explore what remains

The open questions are the interesting part: trust, shared context, creativity, and technology that still feels human.

GitHub / open work

A visible trail for the systems behind the Gastrotech Pioneer.

I keep selected work open so the thinking can be followed as it grows. Some projects touch food and culture directly; others explore the useful primitives underneath: Python, WebSockets, Kafka, Redis, and independent services.

View all open workView GitHub profile
event-driven commerce

L8TESTPR0JECTS/EventDrivenStore

EventDrivenStore

A general commerce base for an event-driven system, split across independent bounded contexts and service-owned databases.

Java.NETNode.jsKafkaMySQL
Explore project
gastrotech workbench

L8TESTPR0JECTS/GastroFlow

GastroFlow

A focused build space for exploring how food, context, and software can become one product experience.

GastrotechIn progressMunchOpen source
Explore project
realtime systems

L8TESTPR0JECTS/HitCounter

HitCounter

A small but serious WebSocket playground: daily state, Redis-backed coordination, and a React surface that stays live.

PythonFastAPIWebSocketRedisReact
Explore project

Stack

Practical tools for secure APIs, event streams, cloud operations, and data-heavy services.

JavaC#TypeScriptSpring Boot.NETNode.jsNestJSExpressJavaC#TypeScriptSpring Boot.NETNode.jsNestJSExpress
KafkaRabbitMQTemporalSQSSagaOutboxCQRSIdempotencyKafkaRabbitMQTemporalSQSSagaOutboxCQRSIdempotency
PostgreSQLMySQLMongoDBRedisDynamoDBAuroraRDSSQL ServerPostgreSQLMySQLMongoDBRedisDynamoDBAuroraRDSSQL Server
OAuthOIDCJWTRBACAuth0KeycloakgRPCREST APIsOAuthOIDCJWTRBACAuth0KeycloakgRPCREST APIs

programmeralek.com

Need a backend engineer who can turn unclear systems into durable ones?

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