Joao Pedro de Lira Wojcikiewicz
Senior Backend Engineer
Asuncion, Paraguay
Summary
Backend engineer focused on reliability and cloud modernization.
Strong record of improving latency, cost, and delivery speed.
Skills
Core technical
Backend
Data
Cloud
Soft skills
Experience
2024-12 – 2026-05
Senior Backend Engineer
Ambassador Software
Senior backend engineer working on a high-throughput SaaS platform, responsible for system reliability, observability, and architectural clarity under aggressive delivery timelines.
- Led end-to-end instrumentation of backend services, improving traceability and reducing customer support troubleshooting time by more than 3x.
- Introduced backward-compatible standard API error contracts across legacy clients.
- Established architectural documentation and decision records (ADR), improving accountability and long-term maintainability.
- Refactored core codebase and database layers with a focus on safety, clarity, and robust error handling.
- Reduced deployment time from over one hour to approximately 15 minutes by integrating elastic cloud resources and infrastructure-as-code.
- Acted as technical interface with customer support, producing clear and actionable operational documentation.
- Built a modular, auditable, reliable and reusable rewards/payment system, serving thousands of users of our clients, with approval processes in place.
2021-05 – 2024-12
Senior Backend Engineer
League Inc
Senior engineer on the core Platform team, responsible for backend libraries, cloud infrastructure, and system extensibility serving large-scale healthcare products.
- Recognized multiple times for code quality, architectural proposals, and cross-team collaboration.
- Led the design and delivery of an extensible user-deletion platform feature involving multiple stakeholders.
- Planned and executed zero-downtime API gateway deployment on existing production infrastructure.
- Drove platform extensibility initiatives enabling the system to scale to 10x current user volume with customer-specific customization.
- Frequently engaged to unblock other teams facing tight delivery deadlines.
2021-05 – 2022-05
Software Specialist
e-Core
Embedded senior engineer within a client squad operating as part of League Inc.’s platform team.
- Fully integrated with client engineering workflows, contributing directly to platform initiatives.
- Shared platform and infrastructure knowledge with internal engineers.
2019-05 – 2020-05
Fullstack and Machine Learning Engineer
code7
Full-stack engineer within the data science team, responsible for building a SaaS platform to deploy, manage, and consume machine learning models.
- Delivered the first production-ready version of the platform (backend and frontend) in under six months.
- Designed backend services using Django and Django REST Framework with Redis and PostgreSQL.
- Built Angular-based frontend to simplify model consumption by analysts, significantly improving productivity.
- Defined deployment and training protocols allowing new models to be deployed in seconds.