Nikolaos

From Greece (UTC+3)

Back-end Web DeveloperMiddle-to-senior

9 years of commercial experience

E-commerce

Food and beverages

Music and audio

Social media

AI software

Customer support software

Enterprise software

Mobile apps

Platforms

SaaS

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Nikolaos is looking for the first project with us, but we have verified and summarised the previous experience for you

Skills and seniority verified on May 30, 2022

Nikolaos – Python, Django, Ruby

Nikolaos boasts over 8 years of experience designing and developing scalable systems, specializing in Python-based backend solutions. Skilled in creating robust data pipelines, integrating AI-powered features, and managing complex distributed systems, he has a proven ability to lead teams in developing microservices and optimizing performance for high-traffic environments. Experienced in working with cloud infrastructure (AWS) and machine learning integrations, with a passion for solving technical challenges in fast-paced, collaborative environments.

Main technologies

Python

6 years

Django

6 years

Additional skills

Ruby

Ruby on Rails

Data Science

Flask

REST API

AWS

JavaScript

Lambda

PostgreSQL

MariaDB

MySQL

Redis

MongoDB

jQuery

HTML

CSS

Ready to start

ASAP

Direct hire

Potentially possible

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Experience Highlights

Senior Software Engineer

Mar 2023 - Aug 20241 year 5 months

Project Overview

Building new integrations for CRM systems, Enabling AI Analysis on CRM data

Skeleton

Responsibilities:

Enabled 3 new chat integrations with CRM systems
Enabled integrations with 4 telephony systems
Integrating with External voice transcription and PII redaction systems
Maintained company's monolith, fixing bugs and implementing new features
Improved the existing data ingestion pipeline to make it more scalable and fault-tolerant

Project Tech stack:

Python

Django

Django REST

Flask

Celery

Docker

Docker Compose

Kubernetes

ElasticSearch

AWS

Amazon S3

GPT

GPT-3

GitHub

GitLab CI

GitHub Actions

LLM

API

Senior Python Engineer

Nov 2021 - Mar 20231 year 4 months

Project Overview

Building Integrations with delivery partners that provide delivery as a service to restaurants. Development of an algorithm that selects the best delivery partner to execute each order, taking into consideration the company's profit and customer's satisfaction.

Skeleton

Responsibilities:

Redesigned back-end architecture
Integrated new providers
Developed a system to pick the best providers for each order
Maintained the microservices and the big monolith

Project Tech stack:

Python

Django

Celery

Django REST

AWS

Python

Django

Django REST

Celery

AWS

Amazon S3

AWS SES

Amazon EC2

API

AWS Lambda

Redis

Kafka

Amazon RDS

PostgreSQL

Pyramid

Back-end Engineer

May 2021 - May 20221 year

Project Overview

RESTful API for an innovative Social Media mobile application.

Skeleton

Responsibilities:

Created back-end architecture
Lead a team of 3 BE Engineers
Worked with Mobile Engineers to standardize API
Implemented API with performance in mind
Deployed service to AWS
Wrote unit, integration and e2e tests

Project Tech stack:

Python

Django

REST API

AWS

JavaScript

jQuery

HTML

CSS

Django

Django REST

API

AWS

Amazon S3

Docker

Software Engineer

Apr 2021 - Dec 20218 months

Project Overview

Match records related to music copyrights from label companies and sources like Youtube and Spotify using Deep Learning.

Skeleton

Responsibilities:

Created back-end architecture
Implemented new features
Scaled service to run for more customers

Project Tech stack:

Python

Flask

AWS

JavaScript

HTML

CSS

jQuery

Software Engineer

Apr 2019 - Apr 20212 years

Project Overview

Biggest marketplace and price-comparison engine in Greece.

Skeleton

Responsibilities:

Worked on various internal projects as part of the Kernel Team (Core Product Department). Tasks mainly related to Backend Development using Ruby on Rails, MariaDB, Kafka and ElasticSearch
Was in charge of scaling, performance, and reliability
Made an identification of bottlenecks in the main application
Detected and fixed problematic slow queries or parts of code
Moved parts of code that hit external services or APIs to asynchronous task queues using Kafka.
Applied security fixes
Increased and monitored test suite coverage during the upgrade phase
Integrated new features of the framework
Was in charge of User Account Protection
Refactored and improved existing authentication and authorization system
Implemented features regarding users’ security and GDPR

Project Tech stack:

Ruby on Rails

MySQL

ElasticSearch

JavaScript

jQuery

HTML

CSS

Keep in mind, the experience summary might exclude non-relevant projects

Education

2015

Electrical and Computer Engineer

MSc

2022

Data Science

MSc

Languages

French

Pre-intermediate

Greek

Advanced

English

Advanced

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