Pawel Rusicki - Senior Software Engineer

Recommended expert

Poznań, Poland

Experience

Apr 2023 - Present

2 years 10 months

Lisbon, Portugal

Senior Software Engineer

Syndicode

Designed and implemented multi-tenant API integration framework using Node.js, GraphQL, and AWS API Gateway, improving scalability and service reliability by 40%.
Built event-driven microservices leveraging AWS Lambda, SQS, and DynamoDB, enabling seamless third-party integrations and faster client onboarding.
Developed automated CI/CD pipelines with GitHub Actions, Terraform, and Docker, reducing deployment time by 55% and ensuring consistent infrastructure provisioning.
Collaborated with architects to define API-first strategy, optimizing data contracts and REST/GraphQL endpoints for frontend and partner developers.
Led implementation of OAuth2 and JWT-based authentication, enhancing API security and compliance with enterprise standards.
Integrated payment, analytics, and CRM services using asynchronous messaging and retry mechanisms to guarantee reliability in distributed systems.
Improved system observability using Datadog and OpenTelemetry, reducing mean time to resolution by 30% across cloud-based applications.
Mentored junior engineers in Node.js, API design, and integration testing, promoting engineering quality and shared knowledge within the team.
Partnered with DevOps to migrate monolithic backend into containerized microservices on EKS, improving fault tolerance and system uptime.
Championed adoption of IaC and API documentation automation using Terraform and Swagger, standardizing deployments and API governance practices.

Oct 2021 - Mar 2023

1 year 6 months

Philadelphia, United States

Senior Software Developer

lnoxoft

Architected and developed RESTful and GraphQL APIs integrating internal systems and SaaS platforms using Node.js, NestJS, and PostgreSQL.
Engineered scalable data processing pipelines using Kafka and Python, reducing latency for cross-service communications and improving reliability of analytics.
Implemented AWS Lambda and Step Functions to automate workflow orchestration and event-driven serverless tasks for business-critical applications.
Integrated third-party APIs such as Salesforce, Stripe, and Twilio to extend product capabilities and improve enterprise client adoption.
Built reusable API SDKs and shared npm packages, accelerating integration timelines for partner developers and frontend applications.
Optimized backend performance with Redis caching, pagination, and query tuning, improving API response times by 45%.
Created React-based admin dashboards communicating with secure REST endpoints, enhancing user visibility into integration workflows.
Automated infrastructure provisioning via Terraform and improved CI/CD release management through GitHub Actions and AWS CodePipeline.
Introduced API versioning and rate-limiting policies for high-traffic endpoints to ensure stability under heavy load.
Partnered closely with stakeholders to design integration roadmaps, aligning technical strategy with product growth objectives.

Aug 2018 - Sep 2021

3 years 2 months

Bucharest, Romania

Full Stack Developer

SoftXPro

Developed and maintained API-driven enterprise solutions using Python, Flask, and Django REST Framework, improving integration reliability across multiple environments.
Built and optimized microservices architecture with Docker and Kubernetes, enhancing scalability and deployment flexibility for cloud-native workloads.
Integrated external payment gateways, CRM, and analytics APIs, streamlining business operations and automating customer onboarding.
Designed data synchronization jobs using Celery and RabbitMQ, improving throughput and minimizing message latency for asynchronous workflows.
Collaborated with frontend teams using React and TypeScript, providing clean, secure, and versioned API contracts.
Introduced automated API monitoring and alerting with Prometheus and Grafana, ensuring proactive response to service degradation.
Supported migration to AWS cloud infrastructure, implementing EC2, S3, RDS, and CloudWatch resources via IaC principles.
Strengthened code quality through unit testing, integration tests, and code reviews, increasing overall product stability and developer productivity.

May 2015 - Jul 2018

3 years 3 months

Lublin, Poland

Full Stack Developer

Sollers Consulting Sp. z o.o

Contributed to design and implementation of REST APIs and backend modules using Java Spring Boot and Hibernate for enterprise insurance systems.
Supported integration between legacy SOAP services and modern RESTful endpoints to enhance data flow between customer and partner applications.
Participated in building frontend interfaces with AngularJS, HTML5, and CSS3, connecting seamlessly with backend microservices.
Built reusable API clients and testing scripts using Postman and JMeter, validating endpoints under heavy load.
Deployed containerized applications via Docker Compose for simplified local development and integration testing.
Collaborated with QA and DevOps teams to optimize CI/CD pipelines and automate regression testing for microservices.
Resolved system bugs, optimized SQL queries, and ensured data integrity across distributed systems, improving reliability by 20%.

Summary

Results-driven Senior Software Engineer with 10+ years of experience designing, integrating, and optimizing scalable backend and API-driven platforms across diverse industries. Proficient in Node.js, Python, AWS, REST, GraphQL, and microservices, with a strong focus on performance, security, and automation. A collaborative engineer who delivers reliable, maintainable systems that streamline data exchange, improve scalability, and support business growth.

Skills

Core Languages & Frameworks

Node.js
Typescript
Python
Java
Go
C#
Flask
Django
Spring Boot
Nestjs

Api & Integration

Rest
Graphql
Grpc
Kafka
Rabbitmq
Websockets
Api Gateway
Swagger
Postman
Fivetran

Cloud & Devops

Aws (Lambda, Ecs, Api Gateway, Cloudformation, S3, Dynamodb, Rds)
Terraform
Docker
Kubernetes
Jenkins
Github Actions
Argocd

Database Systems

Postgresql
Mysql
Mongodb
Redis
Dynamodb

Security & Authentication

Oauth2
Jwt
Sso
Okta
Aws Cognito
Iam
Ssl/tls

Monitoring & Logging

Datadog
Grafana
Prometheus
Cloudwatch
Elk Stack

Ci/cd & Automation

Terraform
Gitops
Jenkins
Github Actions
Circleci
Bitbucket Pipelines

Soft Skills

Cross-functional Collaboration
Mentoring
Agile Delivery
Technical Leadership
Problem Solving
Scalability Design

Languages

Polish

Native

English

Elementary

Education

Oct 2011 - Apr 2015

Lublin University of Technology

Bachelor’s degree, Computer Science · Computer Science · Lublin, Poland

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Summary

Skills

Languages

Education

Lublin University of Technology

Bachelor’s degree, Computer Science · Computer Science · Lublin, Poland

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