Kamil Maruta - Senior Software Engineer

Q: Where is Kamil based?

Kamil is based in Czasław, Poland .

Q: What languages does Kamil speak?

Kamil speaks the following languages: Polish (Native), English (Advanced) .

Q: How many years of experience does Kamil have?

Kamil has at least 10 years of experience. During this time, Kamil has worked in at least 4 different roles and for 4 different companies . The average length of individual experience is 3 years and 7 months . Note that Kamil may not have shared all experience and actually has more experience.

Q: What is Kamil's latest experience?

Kamil's most recent position is Senior Software Engineer at Ricoh Europe .

Q: What companies has Kamil worked for in recent years?

In recent years, Kamil has worked for Ricoh Europe and Thoughtworks .

Q: Which industries is Kamil most experienced in?

Kamil is most experienced in industries like Information Technology (IT) and Healthcare .

Q: Which business areas is Kamil most experienced in?

Kamil is most experienced in business areas like Information Technology (IT) , Product Development , and Quality Assurance (QA) .

Q: Which industries has Kamil worked in recently?

Kamil has recently worked in industries like Information Technology (IT) and Healthcare .

Q: Which business areas has Kamil worked in recently?

Kamil has recently worked in business areas like Information Technology (IT) , Product Development , and Quality Assurance (QA) .

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Czasław, Poland

Experience

Oct 2024 - Present

1 year 5 months

Senior Software Engineer

Ricoh Europe

Developed core microservices with Ruby (Rails) and Python (Django), implementing REST and GraphQL APIs for seamless, real-time data synchronization and project workflow orchestration.
Engineered semantic ingestion, enrichment, and advanced retrieval using LangChain, LlamaIndex, and OpenAI API integrations, allowing teams to unlock actionable knowledge from vast data sets.
Designed and optimized vector search capabilities with FAISS and Chroma, achieving a 34% reduction in average response time for complex queries.
Built interactive, modular front-end experiences in React and TypeScript, powering dashboards, analytics, and user-driven project management features.
Modeled and tuned PostgreSQL schemas for partitioning, indexing, and robust transactional integrity to support high-volume, multi-tenant analytic workloads.
Automated secure deployments using Docker and AWS ECS across all microservices, enabling blue/green releases and rapid scaling with zero downtime.
Established end-to-end CI/CD pipelines in GitHub Actions, integrating automated test suites (RSpec, Pytest, Jest, Cypress) and static code analysis for every release.
Managed AWS provisioning, IAM, and network security with Terraform, improving cost efficiency and streamlining compliance audits.
Implemented authentication/authorization flows using JWT, OAuth2, and AWS Secrets Manager for robust, secure data access.
Enhanced observability with CloudWatch, Prometheus, and distributed tracing, resulting in a 27% reduction in mean time to recovery.
Mentored engineering teams in Rails, Django, and AWS native best practices, boosting development velocity and code reliability.
Authored and maintained comprehensive Swagger/OpenAPI specifications, accelerating partner and internal integrations.
Drove cloud cost optimizations, reducing monthly AWS spend by 26% through auto-scaling, resource lifecycle policies, and rightsizing.

Jun 2020 - Sep 2024

4 years 4 months

Full Stack Engineer

Thoughtworks

Built and maintained microservices and APIs in Ruby (Rails) and Python (Django), supporting analytics, ETL, and workflow automation.
Developed rich, reactive UIs using React, Redux, and TypeScript to enhance clinical efficiency and data transparency.
Designed secure, high-performance PostgreSQL schemas and complex queries for HIPAA-compliant patient data management.
Automated deployments via Docker and AWS ECS, achieving high deployment velocity and minimal production risk.
Integrated OAuth2 and RBAC, encrypted storage, and AWS IAM to meet and exceed healthcare data compliance requirements.
Automated unit and end-to-end test workflows in RSpec, Pytest, and Cypress, maintaining high code quality and rapid feedback cycles.
Optimized ETL, background job, and real-time reporting pipelines using Celery and Sidekiq for cross-framework operability.
Led code reviews, technical workshops, and DevOps adoption, increasing team efficiency and deployment rates.
Implemented infrastructure monitoring, alerting, and logging using AWS CloudWatch and custom dashboards.

Jul 2016 - May 2020

3 years 11 months

Software Engineer

Soltech

Developed modular models and business logic with Ruby (Rails) and Python (Django) supporting user management, analytics, and content delivery.
Built and enhanced React-based dashboards for seamless end-user interaction and administrative oversight.
Designed advanced, compliant relational schemas in PostgreSQL to support high transaction volumes.
Automated deployments and CI pipelines using Docker, AWS ECS, and Jenkins for robust, repeatable releases.
Applied JWT-based authentication, rigorous testing (RSpec, Minitest, Jest), and comprehensive code reviews.
Established documentation, code review best practices, and process guides to facilitate team expansion.
Enhanced reporting and notifications via email, Slack, and custom messaging integrations.

Nov 2015 - Jun 2016

8 months

Junior Software Developer

Current Health

Contributed to backend API development using Ruby (Rails) and Python, implementing business logic for payments and user insights.
Developed front-end React components for admin and analytics reporting.
Supported PostgreSQL schema design, performance tasks, and backup automation.
Automated containerization and AWS cloud deployments using Docker and CloudFormation.
Built unit, integration, and e2e test suites with RSpec and Pytest to ensure product quality.
Enhanced process documentation and delivered onboarding sessions for new team members.

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 (10.5 years) and Healthcare (5 years).

Information Technology

Healthcare

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 (10.5 years), Product Development (10.5 years), and Quality Assurance (5 years).

Information Technology

Product Development

Quality Assurance

Summary

Senior Software Engineer with over 11 years of experience architecting, developing, and optimizing cloud-native solutions using Ruby, Python, React, and AWS. Expert in designing scalable microservices, secure APIs, and responsive front-end applications, driving enterprise-grade projects from conception to reliable production.

Skills

Backend: Ruby (Rails), Python (Django), Restful Apis, Microservices, Asynchronous Processing, Graphql
Frontend: React, Typescript, Redux, Javascript (Es6+), Html5, Scss
Databases: Postgresql, Mongodb, Redis
Cloud & Devops: Aws (Ec2, S3, Lambda, Rds, Ecs, Iam), Docker, Kubernetes, Terraform, Ci/cd (Github Actions, Gitlab Ci)
Testing: Rspec, Minitest, Pytest, Django Test, Jest, Cypress, Selenium, Postman
Ai & Data: Llamaindex, Langchain, Openai Api, Faiss, Chroma
Tools: Git, Jira, Confluence, Visual Studio Code, Intellij Idea, Swagger/openapi, Sonarqube, Figma

Languages

Polish

Native

English

Advanced

Education

Oct 2011 - Jun 2015

University of Oxford

Bachelor of Science, Computer Science · Computer Science · Oxford, United Kingdom

Profile

Created

January 2026

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Kamil based?

Kamil is based in Czasław, Poland.

What languages does Kamil speak?

Kamil speaks the following languages: Polish (Native), English (Advanced).

How many years of experience does Kamil have?

Kamil has at least 10 years of experience. During this time, Kamil has worked in at least 4 different roles and for 4 different companies. The average length of individual experience is 3 years and 7 months. Note that Kamil may not have shared all experience and actually has more experience.

What roles would Kamil be best suited for?

Based on recent experience, Kamil would be well-suited for roles such as: Senior Software Engineer, Full Stack Engineer, Software Engineer.

What is Kamil's latest experience?

Kamil's most recent position is Senior Software Engineer at Ricoh Europe.

What companies has Kamil worked for in recent years?

In recent years, Kamil has worked for Ricoh Europe and Thoughtworks.

Which industries is Kamil most experienced in?

Kamil is most experienced in industries like Information Technology (IT) and Healthcare.

Which business areas is Kamil most experienced in?

Kamil is most experienced in business areas like Information Technology (IT), Product Development, and Quality Assurance (QA).

Which industries has Kamil worked in recently?

Kamil has recently worked in industries like Information Technology (IT) and Healthcare.

Which business areas has Kamil worked in recently?

Kamil has recently worked in business areas like Information Technology (IT), Product Development, and Quality Assurance (QA).

What is Kamil's education?

Kamil holds a Bachelor in Computer Science from University of Oxford.

What is the availability of Kamil?

Kamil is immediately available for suitable projects.

What is the rate of Kamil?

Kamil's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.