Adam Cemerys
Senior Software Engineer
Experience
Senior Software Engineer
Comarch
- Led the design and implementation of enterprise-level applications using Python, Java, ReactJS, and Go, delivering scalable solutions across finance and telecom domains.
- Architected microservices with Spring Boot, FastAPI, and gRPC, integrating data pipelines for AI-driven analytics.
- Improved system reliability by containerizing services with Docker and orchestrating with Kubernetes (EKS).
- Designed RESTful and GraphQL APIs, enabling seamless integration with frontend and mobile platforms.
- Enhanced application performance through caching (Redis) and async data processing.
- Collaborated with data scientists to deploy AI/ML models into production using Python, TensorFlow, and MLflow.
- Reduced API latency by 45% through optimized query handling and async architecture.
- Increased deployment efficiency by 60% via automated GitHub Actions pipelines.
- Led a modernization initiative that migrated legacy modules to microservices, reducing maintenance cost by 30%.
- Tech stack: Python, FastAPI, Django, Java, Spring Boot, Go, C++, ReactJS, TypeScript, PostgreSQL, Redis, Kafka, Docker, Kubernetes, Jenkins, AWS (ECS, Lambda, CloudWatch), MLflow, TensorFlow, REST/GraphQL APIs, SonarQube, Prometheus, GitHub Actions, Agile/Scrum.
Full Stack Developer
STX Next
- Delivered production-ready web applications using Python, JavaScript, and ReactJS within an Agile product team.
- Designed and implemented RESTful APIs with FastAPI and Spring Boot, connected to PostgreSQL and Elasticsearch backends.
- Developed reusable React components with Redux and RxJS for high-traffic dashboards.
- Integrated caching and background task queues with Celery and Redis to enhance responsiveness.
- Contributed to containerization and deployment automation using Docker and AWS ECS.
- Improved scalability by re-architecting monolithic backends into modular microservices.
- Streamlined CI/CD with Jenkins and GitLab, cutting release times by 50%.
- Collaborated with frontend teams to reduce page load times by 40% through React optimization and lazy loading.
- Tech stack: Python, FastAPI, Django, ReactJS, TypeScript, Redux, RxJS, Node.js, PostgreSQL, Redis, Elasticsearch, AWS ECS, Docker, Jenkins, Nginx, CI/CD, REST APIs, Git, Agile/Scrum.
Full Stack Developer
SoftServe
- Built and maintained data-driven applications using Java, Angular, and Python for healthcare and enterprise clients.
- Integrated secure user authentication and OAuth2 authorization with Spring Security.
- Designed responsive interfaces with Angular 7, HTML5, and SCSS, ensuring cross-browser compatibility.
- Worked closely with QA and product teams in Agile sprints to deliver reliable, feature-rich applications.
- Refactored legacy modules into modern microservices, improving maintainability by 35%.
- Implemented SQL query optimization in PostgreSQL, reducing heavy query execution times by 70%.
- Delivered full-stack reporting modules integrated with analytics and visualization tools.
- Tech stack: Java, Spring Boot, Python, Angular, TypeScript, HTML5, SCSS, PostgreSQL, MySQL, Redis, JUnit, Mockito, Karma, Docker, Jenkins, REST APIs, Git, OAuth2, Agile/Scrum.
Backend Developer
Future Processing
- Developed backend systems using Java, C++, and Python to support secure transaction workflows and enterprise automation.
- Designed message queues and asynchronous processing pipelines with RabbitMQ and Kafka.
- Implemented business logic for financial risk assessment and policy management systems.
- Worked closely with frontend and QA teams to align API contracts and deployment schedules.
- Improved system throughput by 50% by optimizing SQL queries and thread management.
- Reduced defect rate by implementing integration tests and automated build pipelines.
- Delivered robust REST APIs that became the foundation for new enterprise projects.
- Tech stack: Java, C++, Python, Spring, Hibernate, JPA, RabbitMQ, Kafka, REST APIs, SQL, PostgreSQL, Git, Maven, Jenkins, Docker, Unit Testing, Agile/Scrum.
Industries Experience
See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.
Experienced in Information Technology (11 years), Banking and Finance (6 years), Telecommunication (3.5 years), and Healthcare (2 years).
Business Areas Experience
The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.
Experienced in Information Technology (11 years) and Product Development (7 years).
Summary
Senior Software Engineer with over 10 years of hands-on experience designing, developing, and optimizing scalable software solutions using Python, JavaScript (ReactJS), Java, Go, C++, and Rust. Proven ability to translate business requirements into efficient, high-performance architectures that deliver measurable value. Adept at building full-stack applications with modern frameworks and orchestrating microservice ecosystems using containerization and cloud technologies. Experienced in leading Agile teams, conducting code reviews, and mentoring developers in clean coding practices and CI/CD automation. Passionate about artificial intelligence, cloud-native development, and solving complex technical challenges with a balance of creativity and precision. Known for cross-team collaboration, technical adaptability, and delivering reliable, production-ready software at scale.
Skills
Python
Javascript (Reactjs, Node.js, Typescript)
Java
Go
C++
Rust
Html5
Scss
Angular
Spring Boot
Django
Fastapi
Restful Apis
Graphql
Microservices
Grpc
Jpa
Hibernate
Kafka
Rabbitmq
Celery
Postgresql
Mysql
Redis
Elasticsearch
Oracle Db
Aws (Ecs, Lambda, Cloudwatch)
Docker
Kubernetes
Jenkins
Github Actions
Ci/cd
Terraform
Pytest
Junit
Mockito
Jest
Jasmine
Karma
Sonarqube
Test Automation
Clean Architecture
Solid
Tdd
Agile/scrum
Mvc
Continuous Delivery
Git
Gitlab
Github
Intellij Idea
Vs Code
Postman
Jira
Confluence
Languages
Education
Singapore University of Technology and Design (SUTD)
Bachelor’s Degree in Computer Science · Computer Science · Singapore
Certifications & licenses
AWS Certified Developer – Associate
Oracle Certified Professional, Java SE
Spring Framework Professional Developer
Profile
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