Intergiro, Warsaw, Poland
Key technologies: Node.js, React, Javascript/Typescript, Express, NestJS, MySQL, PostgreSQL, SQLite, Docker, Kubernetes, Terraform, Teamcity, Google Cloud Platform, Cloudflare Workers
During my 3-year tenure at Intergiro, I progressed from a individual contributor to a team leader, working across the entire product development lifecycle. I collaborated closely with cross-functional teams to design, develop, test, and deploy critical features; consistently drove technical improvements, fostered team growth through mentoring, and maintained a strong focus on delivering business value.
Lead Software Engineer, PSP and Merchant Acquirer Team
April 2023 - June 2024
- I was deployed to resolve urgent issues in the Acquiring Team's revenue-critical product.
- Led a team of 5 to stabilize a newly acquired product, enabling the company to scale its transactional throughput by 10x; the product became the primary revenue generator, contributing 80% of total revenue
- Eliminated data loss and significantly boosted query performance by migrating (without any downtime) both historical and ongoing data from Cloudflare Workers KV storage and Durable Objects to PostgreSQL
- Migrated critical project components - including settlement and reconciliation of transactions, payouts, and balance calculation - to the company’s technological stack, enhancing system performance, reliability, and observability while enabling faster development of new features
- Shared best practices with my team, fostering a culture of continuous improvement. Onboarded a new team member, guiding them in both technical and domain-specific aspects of the project.
Senior Software Engineer, Onboarding and Internal Tools Team
September 2021 - March 2023
- Designed and documented a PSD2-compliant solution for SCA and dynamic linking, and coordinated its implementation across 4 teams to ensure seamless integration spanning multiple microservices and frontends
- Developed the core of automated corporate and individual KYC flows, leading to a 44% reduction in customer onboarding costs and enabling the straightforward expansion of these flows in the future
- Led a team of 4 in developing a new B2B onboarding portal (web application facing both customers and onboarding staff), meeting a critical deadline and increasing the conversion rate by 30%
- Wrote integrations with 10+ different 3rd party services, including Twilio, Onfido, Hubspot, and others
- Developed multiple packages and developer tools improving developer experience and minimizing manual activities
- Optimized the asynchronous communication layer between services, enhancing reliability and scalability across the organization.
- Collaborated with QA to improve end-to-end test implementations, ensuring smoother and more reliable releases.
- Interviewed, onboarded, and mentored developers, fostering their independence and supporting their growth within the team through pair programming and knowledge-sharing sessions
Software Engineer, Onboarding Team
April 2021 - August 2021
- Standardized API error responses across all endpoints and developed a testing utility to simplify writing integration tests for API endpoints using the Chai plugin
- Refactored a React application, enabling it to be efficiently split into smaller bundles