Leonid Sopov

Senior Backend Engineer

MY.GAMES — Payment Solutions Department Mar 2024 – Now //2 yrs

Working on secure payment infrastructure under PCI DSS, GDPR, DORA, and internal security policy requirements.

• Maintained and refactored legacy Perl payment services for security, stability, and testability.
• Integrated new payment acquirers (Payermax, Stripe, Adyen), implementing 3DS authorization flows, IBAN/country code validation, and anti-fraud system hooks.
• Built unit, E2E, and pytest-based integration tests for payment acquirer flows.
• Maintained versioned database migrations using Alembic (Python) across multiple service databases.
• Established Docker security standards across the team: read-only containers, capability dropping, resource limits.
• Migrated services from Docker Compose to Kubernetes.
• Built and maintained the team's shared development environment: reverse proxy, uptime monitoring, mock API services, and Docker orchestration.
• Optimized stage deployment pipeline from ~9 minutes to 14 seconds: replaced git attribute filters with direct text substitution, optimized startup scripts, and added git caching.
• Implemented Git-based SSH access management with automated provisioning and account expiration.
• Fixed security vulnerabilities in payment processing code and automated secret rotation across service configuration files.

Senior Go & Python Developer

Acronis — Platform Department Jul 2020 – Jan 2024 //4 yrs

Worked on backend services and tooling with a focus on legacy migration, API development, and automation.

• Rewrote the Serial Number parsing service from Perl (with C++ XS bindings) into a standalone Go REST API, eliminating the C++ build dependency.
• Extended the Go Account Server: migrated API endpoints from the Python backend and resolved critical production issues.
• Migrated AMQP client library from streadway/amqp to amqp091-go, modernizing async messaging across services.
• Extended and maintained the Reporting Service: replaced DELETE-based retention with DROP PARTITION for performance, added support for new offering items, and resolved critical production incidents.
• Built a configuration parser converting multi-sheet XLSX files into structured YAML for license chain management, deployed across cloud and on-premise environments.
• Implemented E2E tests using Gherkin and Python across multiple services.

Lead of Perl Development Team

Acronis – Perl Applications Department Nov 2019 – Jul 2021 //2 yrs

Led the Perl backend team at Acronis (with the company since 2008), managing up to 6 developers, responsible for core internal services and infrastructure tools.

• Mentored and supported a team of two developers, ensuring professional growth and effective collaboration.
• Oversaw code quality, implemented unit testing standards, and maintained internal documentation (including POD).
• Acted as Release Manager, coordinating deployments and system updates.
• Wrote detailed design documentation and clarified undocumented system internals.
• Introduced and enforced code review practices and Perl Best Practices.
• Migrated a 122,000-line Perl codebase and containerized services using Docker.
• Served as the single point of contact for all cross-team requests and technical queries related to the Perl backend.

Senior Perl Developer

Acronis — Web Development Department Jul 2014 – Nov 2019 //5 yrs

Maintained and developed core internal backend services. Also covered web systems administration responsibilities when the department had no dedicated sysadmin.

• Maintained and extended internal backend services: access management, licensing, and reporting systems.
• Built an access management system handling ~12,000 transactions per day.
• Replaced internal authorization with Active Directory integration, serving 1,500+ employees daily.
• Improved XML parsing performance 10x by migrating from a DOM-based parser to a custom SAX-based implementation.
• Managed infrastructure of 70+ Linux servers and 3 MySQL (MariaDB) clusters (acting sysadmin role).
• Designed and maintained deployment pipelines and release processes.

Senior Architect

Acronis — Web Development Department Aug 2012 – Jul 2014 //2 yrs

Responsible for system design, reverse engineering of legacy systems, and cross-team technical migrations.

• Designed system architectures for internal backend services.
• Performed reverse engineering of undocumented legacy systems.
• Drove technical migrations and infrastructure improvements across teams.

Head of Web Development Team

Acronis — Web Development Department Dec 2010 – Aug 2012 //2 yrs

Led the Web Development team, responsible for backend services, team processes, and cross-team coordination.

• Managed a team of 6 engineers.
• Introduced Agile methodology and deployed JIRA for project tracking.
• Maintained technical documentation and participated in cross-functional planning.

Perl Developer

Acronis — Web Development Department Feb 2008 – Dec 2010 //3 yrs

Joined Acronis as a Junior Perl Developer and progressed to Senior Perl Developer within 18 months. Developed and maintained internal backend services and automation tooling.

• Developed internal web applications, reporting tools, and administrative interfaces.
• Built automation scripts and internal tooling to support operations and content teams.
• Promoted: Junior Perl Developer (Feb 2008) → Perl Developer (Aug 2008) → Senior Perl Developer (Aug 2009) → Head of Web Dev Team (Dec 2010).

Freelance Web Developer

Campus Crusade for Christ Dec 2006 – Feb 2008 //1 yr

Perl Developer

Metadesign Feb 2005 – Dec 2006 //2 yrs

Web development using Perl at a web studio.

• Developed code for most of the websites managed by the studio (~20 websites over 2 years).
• Built a search engine: indexing robot, morphology-based search, and incremental page updates.
• Designed an advertising system serving over 1.5 million banners daily.
• Organized live internet broadcasting of Drag Racing events.

Founder & Solo Engineer

Bible Online Project — only.bible · bibleonline.ru · bible.ru Oct 2003 – Now //23 yrs

Solo-built and operated for 20+ years. Full ownership: architecture, development, deployment, monitoring, and incident response.

• Platform serving 2M+ unique users and 10M+ page views per year. Multilingual Bible reading and study platform: text reading, side-by-side translation comparison, audio, video, reading plans, Q&A.
• Perl backend (Apache mod_perl2 + HTML::Mason) handling all content delivery across multiple websites.
• Full-text search in Russian, English, and German via Sphinx Search with custom dictionaries and morphology.
• Developed a Go caching reverse proxy deployed in Russia, providing access for users in restricted regions: hybrid SQLite + filesystem cache, content transformation pipeline (URL rewriting, header manipulation, banner injection), Python-generated config system for 35+ domains.
• Developed a Go microservice for parsing and normalizing Bible references (bble.ru): multi-language input (Russian, English), Unicode normalization, prefix book matching, chapter/verse range optimization, QR code API with custom SVG generation.
• Developed a public REST API for Bible texts (api.bibleonline.ru), documented and used by external developers.
• Infrastructure: 100+ Docker containers on a dedicated server with VPS, DNS, and proxy redundancy; custom Nginx compiled from source with optimized module set.
• Operates community across VK (68K+ subscribers), Facebook (7.5K+ likes), and other platforms.

Mathematics and Informatics

Siberian Federal University — Krasnoyarsk Sept 2001 – Jun 2004 //3 yrs

Technical Specialist — Automated Control Systems

College of Space Machine Building — Krasnoyarsk Sept 1997 – Jun 2001 //4 yrs