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Alexander Adam Mukhaer

@alexanderadammukhaer

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I build production backend microservices, authentication systems, and shared infrastructure in Go and TypeScript.

Indonesia

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What I'm looking for

I'm looking for remote backend or infrastructure roles where I can build production microservices, authentication systems, shared libraries, and performance-focused platform capabilities.

At Ultra Voucher, I build backend services for loyalty, authentication, merchant, and SSO platforms using Go and TypeScript. I improved the slowest loyalty dashboard endpoints by about 80% and moved exports and recurring bulk jobs to asynchronous processing.

I designed a multi-tenant Go authentication service with REST, gRPC, Vault-backed JWT signing, refresh-token revocation, and per-client 2FA/OTP, replacing Keycloak. I also built shared inter-service libraries, including an auth client that replaced roughly 1,200 lines of proxy code per service.

I've delivered merchant features, user management, RBAC, token management, and support tooling across payment providers. My work includes closing an API abuse vector, migrating five microservices to ES256 JWT verification, and establishing automated tests across 14 external integrations.

Outside production work, I'm building SonarProbe, an eBPF-based distributed tracing system in Rust, and jwt-vault-go, an open-source Vault-backed JWT library. I also mentor backend learners and have led knowledge-sharing on system design, security, and performance.

Experience

Work history, roles, and key accomplishments

Backend Engineer

Ultra Voucher

Dec 2023 - Mar 2026 (2 years 3 months)

Eliminated slow dashboard queries on a 6-service loyalty platform and moved bulk jobs to asynchronous processing. Built shared inter-service libraries and a multi-tenant authentication service in Go, replacing Keycloak.

NestJS Go PostgreSQL MongoDB Redis Kafka RabbitMQ gRPC Vault

Head of Backend Development

OmahTI UGM

Nov 2023 - Nov 2024 (1 year)

Wrote the backend division's open-recruitment assignment and ran weekly knowledge-sharing sessions. Mentored members on system design, security, and performance.

System Design Security Performance Mentorship

Back-End Learning Path Facilitator

Dicoding Indonesia

Nov 2023 - Mar 2024 (4 months)

Mentored scholarship recipients through IDCamp's Back-End learning path, providing code reviews and consultations. Ran hands-on debugging workshops on real backend bugs.

Backend Development Mentorship Code Review Debugging

Junior Backend Engineer

Ultra Voucher

Dec 2022 - Dec 2023 (1 year)

Migrated 5 microservices to asymmetric JWT verification and built support-operations tooling. Delivered user-facing APIs and RBAC for the admin dashboard.

TypeScript Express NestJS MySQL PostgreSQL

Education

Degrees, certifications, and relevant coursework

Universitas Gadjah Mada

Bachelor of Computer Science, Computer Science

2022 -

Grade: 3.81/4.00

Activities and societies: Teaching Assistant, Computer System & Network Lab

Pursuing a Bachelor of Computer Science with a GPA of 3.81/4.00, including coursework in operating systems, computer networks, cloud computing, and cryptography. Served as a teaching assistant for the Computer System & Network Lab, teaching weekly lab sessions and co-authoring bilingual course materials.