• Managing two cross-functional teams.
• Product architecture and development in a high-load microservices paradigm.
• Process optimization, implementation of development and testing standards, onboarding, and mentoring.
• Roadmap coordination with stakeholders (the bank's core system).

Achievements:

• 100% of processes optimized, TTM reduced from 9 to 3 weeks.
• 0% of rolled-back releases in production.
• 0% of service failures due to code errors.
• 72% of banking systems already integrated.

• A project for the timely collection and transfer of data to a subsidiary bank was successfully completed within 4 weeks.
• A migration from Oracle to Postgres was completed within 2 months (the SQL code was heavily adapted to Oracle's specific requirements).

• Savings of USD 35,000/quarter thanks to my implementation of a dynamic tax system in a US store.
• Fixed ~17 critical errors in checkout processes.
• Implemented and launched a classic regional tax system in an EU and Japanese store.
• Implemented a highly reliable fulfillment processor.

• Localized and resolved a serious PCI DSS violation. Without access to production. For different team.
• Implemented two-factor authentication in the monolith (1.1 million lines of code, 1.3 million lines of tests).
• Improved the development process at the departmental level, saving USD 160,000 per year.

• First payment transactions after four months of development.
• 200,000 payments in the first year, over 1,300,000 by the end of the second.
• Two serious DDoS attacks repelled.
• Payment technology certification in the MasterCard/VISA network.
• Payment Institute license approved by the Luxembourg Ministry of Finance.