Open to opportunities

Mufid Afif

@mufidafif

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Senior software engineer delivering scalable, language-agnostic systems and measurable ROI.

Indonesia

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What I'm looking for

I seek senior engineering roles focused on scalable SaaS platforms, performance, security, and cross-functional leadership in a collaborative, growth-minded company.

I am a Senior Software Engineer with over 11 years building SaaS and e-commerce solutions across APAC, EU, and NAMER, delivering measurable business impact. I am language-agnostic and fluent in Java, Go, C#, Ruby, and PHP, and I learn new technologies quickly.

At SmartrMail I led cross-functional efforts to increase feature adoption and revenue, implemented AI-driven website analysis, optimized Postgres for peak loads, and saved $10,000 monthly via DNS fraud analysis. I drove billing idempotency and data visualization improvements using ClickHouse.

Previously I led engineering teams at Sureswift Capital, Airyrooms, Peentar, and Traveloka, contributing to A/B-driven revenue growth, SEO automation, deliverability dashboards, and architecting omnichannel SaaS and IoT platforms that supported significant user growth.

I care about engineering culture, test-driven development, open source, and community—actively joining local meetups and mentoring teams to scale from early-stage startups to 40 employees while emphasizing reliability, security, and performance.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

SmartrMail

Nov 2022 - Mar 2025 (2 years 4 months)

Implemented AI-driven website analysis and automated profile scraping to increase feature usage by 5%, migrated $40k+ Stripe subscriptions to optimize FX fees, and improved Postgres indexing to handle 500% peak traffic while boosting email-driven revenue by 20%.

Ruby on Rails PostgreSQL Clickhouse Docker Redis GraphQL AWS OpenRouter SSO

Senior Software Engineer

Sureswift Capital

Aug 2020 - Nov 2022 (2 years 3 months)

Led engineering work on Shopify apps and billing systems, delivered A/B-driven product changes that doubled revenue for a product and implemented rule engines and SEO automation that increased sales and achieved high user ratings.

Ruby on Rails PostgreSQL React GraphQL AWS Redis A B Testing Performance Optimization

Lead Software Engineer

Airyrooms

Jan 2019 - Jun 2020 (1 year 5 months)

Led the application and architecture team to build an email deliverability dashboard, reducing complaint response time to 15 minutes, and mapped 120+ microservices using Structurizr to drive service improvements.

Kubernetes Docker Redis Junit AWS Microservices Observability

Founding Engineer

Harmonix Teknologi Peentar

Dec 2015 - Jul 2018 (2 years 7 months)

Architected and launched an omnichannel SaaS and IoT platform supporting beta with 1M users, streamlined review cycles to 5 man-days enabling growth from 5 to 40 employees, and built scalable client-heavy architectures for 1,000 POS nodes.

Rails C++gRPC TCP IoT PostGIS Jenkins AWS

Lead Software Engineer

Traveloka

Sep 2014 - Nov 2015 (1 year 2 months)

Architected quick credit card and billing-user management for ~100k users and improved coupon system latency from 2000ms to 50ms while coordinating cross-functional provisioning projects.

Ansible GoCD RPC Performance Tuning Fraud Detection MongoDB

Education

Degrees, certifications, and relevant coursework

Universitas Indonesia

Bachelor of Computer Science, Computer Science

2010 - 2014

Grade: Very Satisfactory

Bachelor of Computer Science degree with a thesis on implementing an electronic ink price tag using a ZigBee-based 802.15.4 network; graduated with Very Satisfactory predicate.