Joao Pedro de Lira Wojcikiewicz
Senior Backend Engineer
Asuncion, Paraguay
Senior Backend and Platform Engineer with 7 years of experience building and evolving cloud-native SaaS systems in Go and Python across AWS and GCP. Experienced in distributed systems, platform architecture, Kubernetes, observability and infrastructure automation. Led initiatives including 4x faster deployments, zero-downtime infrastructure migrations, distributed privacy workflows and platforms designed for 10x scale.
M.Sc. in Theoretical Physics.
Summary
Senior Backend and Platform Engineer with 7+ years of experience designing, operating and evolving cloud-native systems in production.
Specialized in backend architecture, distributed systems, platform engineering, reliability and developer productivity.
Experienced leading ambiguous, cross-functional initiatives involving privacy workflows, platform extensibility, observability, payments and cloud infrastructure.
Based in LATAM with extensive experience working remotely with engineering teams in the US and Canada.
M.Sc. in Theoretical and Mathematical Physics.
Skills
Languages
Backend
Data
Cloud/Platform
Observability
Soft skills
Architecture
Experience
2023-02 – present
Founder / Principal Engineer
Johntek Consulting LLC
Independent engineering consultancy focused on backend architecture, developer productivity and system reliability. Maintained alongside prior engineering roles and available for selected B2B engagements.
2024-12 – 2026-05
Senior Software Engineer
Ambassador Software
Senior backend engineer and tech lead working on a high-throughput SaaS platform, responsible for system reliability, observability and architectural clarity under aggressive delivery timelines.
- Reduced deployment time from over one hour to approximately 15 minutes by integrating elastic cloud resources and infrastructure-as-code.
- Led end-to-end instrumentation of backend services, improving traceability and reducing customer support troubleshooting time by more than 3x.
- Built a modular, auditable rewards and payments system serving thousands of client end users, with approval workflows, operational safeguards and reusable components.
- Implemented a vendor-agnostic AI agent and equipped it with MCP tools to enrich customer queries with customer-specific data for detailed performance reporting.
- Introduced backward-compatible standard API error contracts across legacy clients.
- Established a style guide and architecture and testing patterns that simplified the development cycle.
- Established architectural documentation and Architecture Decision Records, improving accountability and long-term maintainability.
- Refactored core codebase and database layers with a focus on safety, clarity and robust error handling, applying domain-separation best practices.
- Acted as a technical liaison with customer support, producing clear and actionable operational documentation.
2022-05 – 2024-12
Senior Software Engineer
League
Senior engineer on a core healthcare SaaS platform, focused on cloud infrastructure, API gateway architecture, backend extensibility, developer productivity and reliability of shared platform components.
- Led the design and delivery of a distributed GDPR/right-to-erasure architecture requiring propagation across decentralized systems, monitoring, auditability and cross-team coordination.
- Championed backend extensibility initiatives that enabled external integrators to compose League capabilities while reducing tenant-specific backend logic.
- Helped design and deploy Kong API gateway infrastructure on Kubernetes and GCP, enabling safer routing and controlled rollout patterns.
- Developed and maintained core Go components and service drivers used across the platform.
- Optimized CI/CD pipelines by addressing test flakiness, conditional execution and test selection, reducing wasted developer time.
- Participated in critical platform modernization work, including encryption migration and decomposition of core systems into more modular components.
- Contributed to observability, monitoring, documentation and testing of critical backend components.
- Worked on modularization and refactoring initiatives to improve extensibility, reliability and long-term maintainability.
- Recognized three times internally for engineering quality and technical contributions.
2021-05 – 2022-05
Software Specialist, embedded at League Inc.
e-Core
Worked as part of the extended League engineering team, contributing to backend and platform engineering initiatives for healthcare SaaS products.
2019-05 – 2021-05
Fullstack Engineer
code7
Built and maintained an internal machine-learning microservices platform covering backend services, frontend integration, deployment and operational support.
- Developed Python backend services for managing and consuming machine-learning models through standardized interfaces.
- Built internal frontend workflows to simplify model consumption for business and technical users.
- Containerized services and prepared the platform for cloud-oriented deployment.
- Managed deployments and resources on Linux and RHEL infrastructure.
- Led technical design discussions for integrations with the ML platform, helping other developers maintain quality and consistency.
- Migrated and improved AWS-based data enrichment workflows for public establishment data.
- Built recurring data ingestion and parsing tools for public datasets.