Software Engineer Senior

MARKEL KALUHIN · SENIOR SOFTWARE ENGINEER

******.*******@*****.*** 248-***-****

Rochester Hills, MI, USA, 48309 linkedin.com/in/markel-kaluhin/ Click to schedule the meeting github.com/Markel-Kaluhin WORK EXPERIENCE

FreightVerify 11/2023 — 05/2024

Senior Software Engineer 7 months

• Initiated the development of a new service for public access system information, and used the best cybersecurity practices

• Reworked the bulk operations service, significantly boosting its throughput by 1500 times

• Introduced strict typing and structured all API calls, reducing the number of bugs related to data inconsistency by 76%

• Spearheaded the development of an atomic design system, increasing the uniformity of appearance of UI elements

• Led the transition from JavaScript to TypeScript for the UI, resulting in a 60% reduction in errors attributed to typeless Technical stack: Python · TypeScript · JavaScript · React · Terraform · PostgreSQL · GitLab · Jenkins · AWS Upside 09/2022 — 09/2023

Senior Software Engineer 1 year

• Reworked graphic recognition, resulting in a 30% faster pipeline for process data and reducing recognition errors by over 60%

• Enhanced AWS Lambda function performance, reducing errors by 20% and response time by 15%

• Reworked AWS infrastructure using Terraform, cutting deployment time by 25% and boosting scalability

• Served as a first-level duty officer for PagerDuty, ensuring a minimum system downtime of less than 1% and providing efficient solutions to common problems, reducing resolution time by 40% Technical stack: Python · TypeScript · FastAPI · Angular · Terraform · Snowflake · DynamoDB · GHA · Jenkins · AWS AutoDS 08/2020 — 05/2022

Tech Lead 1 year 8 months

• Reimagined QA processes to reduce average bugs in the tracker from 60 to 15 per month, improving bugfix efficiency by 75%

• Initiated backlog management, and planning processes, reducing feature delivery time by 30%

• Built CI/CD pipelines from scratch, increasing delivery speed by 5x and reducing time-to-market by 20%

• Managed and mentored 5 developers, hired 15 candidates, conducted 80+ technical interviews Technical stack: Python · FastAPI · Terraform · Docker · MongoDB · MySQL · Celery · AWS · Jenkins · Pandas · Beanie CybeReady 10/2019 — 04/2020

Tech Lead 5 months

• Restructured key product features, reducing database calls by 76% and improving performance by 3x (from 48 to 16 hours), enabling faster order processing and service strategy revisions

• Reached cost savings of over 40% in cloud computing power maintenance

• Mentored a team of 4 developers, managed backlog, and collaborated with stakeholders to drive development decisions Technical stack: Python · TypeScript · Serverless · Angular · Django · Celery · MySQL · AWS · Docker · Jenkins Onseo 04/2017 — 09/2019

Tech Lead 2 years 6 months

• Designed a scalable infrastructure, attaining a throughput of 1500 messages/sec on a single instance using WebSocket

• Supervised a team of 12, including 7 developers, interviewed 5 of them

• Administered the launching of a new product to manage logistics for a fleet of 150 vehicles and over 350 repair crews

• Orchestrated collaboration with customer departments, streamlining requirements gathering, speeding up product development cycles, and initiating user testing and feedback processes Technical stack: Python · TypeScript · Tornado · Angular · React · AWS · Docker · Kubernetes · PostgreSQL Tech Lead

• Optimized and maintained the legacy backend; increased server response rate from 150 to 550 responses per second on a single instance

• Implemented a Microservices add-on for the call center, supporting high-load service for 3500 call center operators Technical stack: Python · TypeScript · Tornado · Angular · Docker · Oracle DBMS · Docker Swarm · Traccar · OSM · OSRM SoftServe 08/2015 — 02/2017

Tech Lead 1 year 6 months

• Drove the discovery phase, establishing requirements, devising an architecture for 4 domains each of which included 15-20 high-scaled services to align with project objectives, and designing a robust data model and infrastructure

• Produced a scalable data storage system for 80PB (Peta Bytes) of data, achieving a throughput of 15TB per hour Technical stack: Python · TypeScript · Tornado · Angular · Docker · Elasticsearch · PostgreSQL · Jenkins Software Engineer

• Created a critical feature, enabling custom infrastructure import into a clustered VM environment, contributing to 40% of the product's value

• Implemented an approach to collaboration with clients and architects led to a 20% reduction in implementation time and facilitated the launch of new product features

• Launched a product generating an annual gross profit of approximately $5M, as per public tax records Technical stack: Python · Flask · Docker · Kubernetes · Jenkins · GitLab Software Engineer

• Headed end-to-end development using agile methodologies, resulting in a 30% increase in dev cycle capacity and a 15% increase in planning accuracy

• Delivered crucial project features speeded virtual machine creation that reduced deployment time by 35% and improved user interface responsiveness by 20%

• Initiated and completed a project single-handedly, improving the maintainability of the code base and reducing the number of post-release defects by 40% within the regulated project stabilization time Technical stack: Python · JavaScript · Pyramid · AngularJS · VMWare · QEMU · Vagrant · pyCLI Worldwide Manufacturing, E.D. 12/2013 — 07/2015

Software Engineer 1 year 7 months

• Engineered and coded a BI system using OLAP cubes for precise volume planning of raw material purchases, production, and sales, achieving a monthly planning accuracy of 99.7%

• Integrated the existing WMS with shipping companies, resulting in a 34% reduction in storekeepers' time spent on picking supplies and a 15.4% decrease in supply losses during delivery Technical stack: Python · SAIKU · Pehtaho · Microsoft SQL Server · PostgreSQL Metinvest Holding 09/2011 — 08/2013

Software Engineer 1 year 11 months

• Automated the data collection and report compilation process, reducing the time required by hundreds of times

• Obtained 100% accuracy in financial and technical reports by eliminating the human factor Technical stack: Python · SAP · Pandas · NumPy · LXML · Excel · SQLite TECHNOLOGIES

• Software Development: Back-End, Front-End, Full-Stack, Single Page Applications, DevOps, CI/CD, AWS.

• Languages: Python, TypeScript, JavaScript, PL/pgSQL, PL/Python, PL/SQL, T-SQL.

• Backend: FastAPI, Tornado, Flask, Django, CherryPy, Pyramid, Serverless, SAM.

• Frontend: Angular, React, HTML, CSS, Stylus, SCSS, TailwindCSS.

• Version control systems: GitLab, GitHub, BitBucket, CVS.

• Databases: PostgreSQL, MySQL, Oracle, SQLite, Microsoft SQL Server, MongoDB, Elasticsearch, AWS DynamoDB.

• Messages/Streams: RabbitMQ, Redis, Kafka, NATS.

• Infrastructure: Docker, Kubernetes, Docker Swarm, Nginx, Apache HTTP Server.

• Architecture designs: Microservice, Layered, Monolityc, Event-based, Domain-Driven, Serverless.

• Paradigms: OOP, Functional, Reactive, Declarative, Parallel and Distributed.

• Managerial: Agile, Scrum, Kanban, Waterfall, Delivery management, Leading, Mentoring, Hiring, Scope control. EDUCATION

Donetsk National University Graduated in 07/2012

Master’s degree

Mariupol State Humanitarian University Graduated in 07/2008 Bachelor's degree

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