Kamil is available for hire
Hire KamilKamil Marut
Verified Expert in Engineering
Software Developer
Wrocław, Poland
Toptal member since May 6, 2022
Bio
Kamil is a full-stack software engineer specializing in developing high-performance and maintainable digital products. He has expertise in pragmatic system design and working with both cutting-edge and established technologies. Most of Kamil's expertise lies in the financial, real estate, and booking and rent industries.
Portfolio
Modash
Python, PySpark, TypeScript, Pulumi, Amazon Web Services (AWS), Milvus...
Majikode
Python, Django, Django REST Framework, HTML, CSS, Go, JavaScript, React, Redis...
NearForm
Python, Shell, Bash, Data Build Tool (dbt), Terraform, Google Cloud...
Experience
- Python - 6 years
- SQL - 6 years
- Software Development - 5 years
- JavaScript - 4 years
- Django - 3 years
- Django REST Framework - 3 years
- Kubernetes - 2 years
- React - 1 year
Preferred Environment
Python, Django, React
The most amazing...
...project I've worked on is an online ticketing application for Poland's biggest sports association, used by tens of thousands of users simultaneously.
Work Experience
Senior Back-end Engineer
2026 - PRESENT
Modash
- Engineered multiple features for the AI search service, such as searching through influencer postings on certain hashtags or mentioning certain accounts.
- Reduced Elasticsearch and Milvus operational costs by roughly 4x thanks to indexing improvements, as well as adding and automating maintenance tasks.
- Improved API endpoints, making vector database queries throughput by 3x.
Technologies: Python, PySpark, TypeScript, Pulumi, Amazon Web Services (AWS), Milvus, Vector Databases, APIs, Elasticsearch
Freelance Lead Engineer & Software Architect
2023 - PRESENT
Majikode
- Led the end-to-end product development for multiple international projects, utilizing Django for robust web application delivery.
- Deployed apps on the AWS platform, ensuring scalable and reliable architectures.
- Integrated diverse APIs (Natif.ai, OpenAI, Zapier), enhancing functionality and service interoperability.
- Headed a team of five to transform a legacy Django monolith into a modular application with supporting services written in Go.
- Created multiple web scraping pipelines using Node.js and Python to obtain and enrich data from government websites, stock exchanges, and marketplaces.
Technologies: Python, Django, Django REST Framework, HTML, CSS, Go, JavaScript, React, Redis, PostgreSQL, Elasticsearch, Web Scraping, Data Scraping, GitHub, Containers, Redis Cache, REST APIs, API Integration, FastAPI, Docker, Selenium, Back-end, Node.js, Data Visualization, SaaS, Full-stack, System Architecture, WebSockets, Cloud Infrastructure, Next.js, Web Development, APIs, Docker Compose, Artificial Intelligence (AI), Large Language Models (LLMs), Automation, Solution Architecture, Technical Leadership, CI/CD Pipelines, Web Security, Startups, Data Science
Senior Data Engineer
2025 - 2026
NearForm
- Rebuilt a legacy Python/Bash ETL into a DBT-based pipeline, cutting processing time from around 24 hours to a few hours, and reducing compute costs by nearly 10 times.
- Provisioned and managed GCP resources using Terraform, including shared datasets, storage, and IAM setups for cross-team stakeholders.
- Automated operational workflows with Python and shell scripts (e.g., deployment helpers, data-quality checks, scheduled maintenance jobs).
Technologies: Python, Shell, Bash, Data Build Tool (dbt), Terraform, Google Cloud, Google BigQuery, Data Engineering
Team Lead
2023 - 2025
Finmatics
- Led sprint planning sessions and daily stand-ups, ensuring tasks were appropriately assigned and that team members remained unblocked and focused on sprint objectives.
- Involved in OKR planning, collaborating with stakeholders to ensure alignment of goals and execution strategies.
- Provided continuous assessment and refined the internal project management processes, identifying areas for improvement and implementing best practices to enhance team productivity and effectiveness.
- Monitored progress and ensured the timely delivery of features, proactively addressing any potential delays or challenges to maintain project timelines.
Technologies: Python, Django, Django REST Framework, Web Project Management, Celery, Redis, Elasticsearch, Software Architecture, SQL, GitHub, Containers, REST APIs, API Integration, FastAPI, Docker, Back-end, Node.js, Data Visualization, SaaS, System Architecture, WebSockets, Cloud Infrastructure, Web Development, APIs, Docker Compose, Artificial Intelligence (AI), Large Language Models (LLMs), Automation, Solution Architecture, Technical Leadership, CI/CD Pipelines, Web Security, Startups, Data Science
Performance and Infrastructure Software Engineer
2022 - 2023
Finmatics
- Worked on AI-powered automation accounting software used by some of Europe's biggest companies.
- Made substantial performance improvements in long-running background jobs and heavy database queries.
- Created and maintained automatic quality control of AI's predictions using historical data and dynamic rule sets.
- Improved internal and public API security and performance.
- Contributed to the architecture and infrastructure of a distributed web application.
Technologies: Python, Django, Django REST Framework, Software Architecture, Elasticsearch, SQL, Redis, GitHub, Containers, Redis Cache, REST APIs, API Integration, FastAPI, Docker, Back-end, Data Visualization, SaaS, WebSockets, Cloud Infrastructure, Web Development, APIs, Docker Compose, Artificial Intelligence (AI), Large Language Models (LLMs), Automation, CI/CD Pipelines, Web Security, Startups
Python Developer
2021 - 2022
B3 Consulting Group
- Designed, developed, and deployed multiple high-availability systems for Poland's most prominent finance and sports companies.
- Built CI/CD solutions and cloud native infrastructure.
- Created reliable and performant integrations with REST and SOAP APIs.
- Developed the architecture and functionality for a secure and performant eCommerce selling process.
Technologies: Python, JavaScript, SQL, Django, Django REST Framework, Redis, Kubernetes, Software Architecture, GitHub, Containers, Redis Cache, REST APIs, API Integration, Docker, Back-end, Node.js, Data Visualization, Full-stack, WebSockets, Cloud Infrastructure, Web Development, APIs, Docker Compose, Automation, CI/CD Pipelines, Web Security
Experience
Computer Image Likeness Assessing Automation (CILISSA)
https://github.com/exler/CILISSACILISSA enables the use of various metrics to perform full-reference image comparisons.
It features the most popular full-reference image quality metrics, image transformations and translations. CILISSA is also very extensible and new operations can be easily added.
CILISSA has an optional Qt-based graphical interface that lets you experiment with various operations and their orders and properties.
It features the most popular full-reference image quality metrics, image transformations and translations. CILISSA is also very extensible and new operations can be easily added.
CILISSA has an optional Qt-based graphical interface that lets you experiment with various operations and their orders and properties.
Finmatics DocuProof
https://github.com/Finmatics/docuproofDocuProof is a unique way to make documents and invoices immutable by using proven blockchain technology. It is an API written in Python communicating with IPFS and Ethereum blockchain to validate that the document has not been tampered with.
WorkWave
WorkWave is a SaaS application aimed at business customers looking to provide "workation" as a benefit to their employees. It provides the management with tools to grant their employees days to spend at the apartment of their choice in different locations and the employees with a nice interface to choose and book the apartments.
TTS FastAPI Back-end for a Mobile Game
Created and deployed a FastAPI service on AWS Elastic Beanstalk to provide text-to-speech functionality based on the Kokoro-82M model for a mobile game. The TTS model was integrated in the back end via the Deepinfra API. Back-end specification was driven by the Unity game's needs.
Financial Billing Application With Real-time Data Warehouse Sync and Dashboards
I was a full-stack developer who created an application that connected to a Salesforce-backed data warehouse, incrementally parsed the data, and served an API to further manipulate and manage it. Then I built the Next.js front end, which enabled users to interact and view dashboards.
Education
2022 - 2023
Master's Degree in Systems Engineering
Wrocław University of Science and Technology - Wrocław, Poland
2018 - 2022
Bachelor's Degree in Control, Electronic, and Information Engineering
Silesian University of Technology - Gliwice, Poland
Certifications
APRIL 2022 - APRIL 2024
Google Cloud Platform (GCP) Engineer Certification
Google Cloud
JULY 2021 - JULY 2024
AWS Certified Solutions Architect – Associate
Amazon Web Services
Skills
Libraries/APIs
React, REST APIs, Node.js, Django ORM, PySpark
Tools
Celery, GitHub, Docker Compose, RabbitMQ, Figma, Shell, Terraform
Languages
Python, SQL, JavaScript, HTML, CSS, TypeScript, Go, Solidity, Bash, SAML
Frameworks
Django, Django REST Framework, Tailwind CSS, Qt, Selenium, Next.js, Flask
Paradigms
Automation
Platforms
Software Design Patterns, Docker, Kubernetes, Amazon Web Services (AWS), Google Cloud Platform (GCP), Ethereum
Storage
Databases, Redis, PostgreSQL, Redis Cache, Elasticsearch, Google Cloud
Other
Software Development, Web Project Management, Distributed Systems, Web Scraping, Data Scraping, Containers, API Integration, FastAPI, Back-end, Data Visualization, SaaS, Full-stack, System Architecture, WebSockets, Cloud Infrastructure, Web Development, APIs, Solution Architecture, Technical Leadership, CI/CD Pipelines, Web Security, Startups, Data Science, Software Architecture, OpenAI, Artificial Intelligence (AI), Large Language Models (LLMs), Security, AWS Cloud Architecture, Image Processing, Design Systems, Data Build Tool (dbt), Google BigQuery, Data Engineering, SAML-auth, OAuth, Pulumi, Milvus, Vector Databases
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