Available to hire
I’m Willy Kristianto, a Backend Engineer and Technical Lead based in Bekasi, Indonesia. I have a proven track record in building scalable systems, optimizing performance, and leading high-performing teams. I focus on streamlining processes, improving data accuracy, and boosting developer productivity while delivering reliable software solutions. I love solving complex problems and driving impactful projects that deliver real value.
Skills
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Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Language
English
Intermediate
Work Experience
Backend Engineer at Digital Transformation Office (DTO)
December 1, 2024 - December 1, 2024Achieved 95% patient integration with Dukcapil by streamlining onboarding processes and enhancing system efficiency. Improved data accuracy by 30% by integrating 50 health center locations with Kemendagri. Reduced production issue resolution time by 3x by implementing an advanced trace, log, and metric system. Enhanced API documentation accessibility for tech stakeholders using Swagger, boosting collaboration efficiency by 25%.
Lead Software Engineer at PT. Bhinneka Mentari Dimensi
August 1, 2023 - August 1, 2023Reduced onboarding time for new developers by 30% by creating comprehensive technical documentation, increasing team productivity. Improved developer performance by 20% by designing KPI components, fostering a results-driven culture. Mentored 9 team members, boosting overall team productivity. Maintained 80% code quality rating by enforcing rigorous testing protocols.
Senior Software Engineer at PT. Bhinneka Mentari Dimensi
June 1, 2020 - June 1, 2020Developed a User Service SDK adopted by 10+ applications, streamlining backend processes and interoperability. Built an order management system, reducing server costs by 30% and response time by 25%. Rewrote catalog product backend, increasing access speed by 40% and enhancing user experience.
Web Programmer at PT. Agranet Multicitra Siberkom
May 1, 2017 - May 1, 2017Optimized content delivery on detik.com, contributing to a 20% increase in monthly active users to 5 million. Improved detik.com viewership by 30% through UI/UX enhancements. Fostered 40% growth in user-generated content submissions on pasangmata.detik.com via engagement strategies.
Web Programmer at PT. Linktone Indonesia
January 1, 2014 - January 1, 2014Increased ozone.com traffic by 25% through strategic portal updates and optimizations. Managed 5 websites for the MNC group, consolidating brand identity and boosting audience reach by 15%.
Education
Bachelor of Informatics Engineering at University of Muhammadiyah Jakarta
July 1, 2011 - March 1, 2013Associate of Management Information System at Gunadarma University
July 1, 2007 - August 1, 2010Qualifications
Industry Experience
Software & Internet, Media & Entertainment, Professional Services, Healthcare
- Go
- PostgreSQL
- Redis pub/sub
- Docker
- Team Leadership
- Project Management
- Backend Engineering
- Led the system redevelopment and migration of an online news portal, reducing article indexing time on Google Search from several hours to just minutes after publishing via the CMS.
- Designed and implemented an advertisement management system, increasing monthly revenue by hundreds of millions (IDR) through optimized ad placement and performance tracking.
Stack
Soft Skill
Impact
- Laravel
- PostgreSQL
- Docker
- CI/CD Gitlab
- Full Stack Development
- Product Development
- Web Development
- Spearheaded the launch of a digital legal services platform, boosting monthly revenue by Rp 50M within 6 months.
- Orchestrated feature refinement discussions, increasing feature adoption from 50 to 100 users and elevating user satisfaction scores from 3.5 to 4.5 out of 5.
- Designed and launched a referral program, acquiring 300 new customers and increasing the user growth rate from 5% to 10% monthly
Stack
Soft Skill
Impact
- Laravel
- PostgreSQL
- Redis pub/sub
- Docker
- CI/CD Gitlab
- Full Stack Development
- Product Development
- Web Development
- Improved administrative processing speed by 25% by engineering a centralized CRM and order management web-app, eliminating manual data entry bottlenecks for the sales team.
- Reduced customer support inquiries by 30% by developing an automated real-time order notification system, which streamlined communication for over 50+ active orders.
- Increased customer repeat purchase rate by 25% through the implementation of a gamified loyalty dashboard that enabled users to track points and redeem rewards seamlessly.
Stack
Soft Skill
Impact
- Go
- PostgreSQL
- Redis
- Docker
- CI/CD Gitlab
- Team Leadership
- Project Management
- Backend Engineering
- Led migration from monolithic WordPress to a service-oriented architecture, improving system uptime
from 99.5% to 99.9%. - Reduced editorial downtime from 5 hours/month to 1 hour/month during traffic spikes by decoupling CMS and public-facing, enabling independent scaling and improving system resilience.
- Enabled horizontal scalability for high-traffic news events, handling 2x more concurrent users (from 25K to 80K) and reducing infrastructure costs from $1K/month to $600/month.
Stack
Soft Skill
Impact
- Laravel
- MySQL
- Full Stack Development
- Web Development
- Modernized legacy PHP 5 application to PHP 8, reducing average page load times from 5 seconds to 1 second and improving system uptime from 99.5% to 99.9%.
- Optimized database queries and indexing, reducing page load times on data-heavy pages from 10 seconds to 1 second.
Stack
Soft Skill
Impact
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