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Chang Shan W.

@changshanlife

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5.0
6
4.0
4.0
75%

Sr. Software Engineer - Python | Node.js

$30 USD / Hour
Flag of
China (10:31 PM)
Joined on January 26, 2021
$30 USD / Hour
Experienced Software Developer adept in bringing forth expertise in the design, installation, testing and maintenance of software systems. Proficient in various platforms, languages. Experienced with the latest cutting-edge development tools and procedures. Able to effectively self-manage during independent projects, as well as collaborate as part of a productive team. Skillset & Experience: - Web development: * Back-end: NEST/NodeJS, Django/Flask, Express.js, Celery, RabbitMQ * Database: Reddis, MySQL, PostgreSQL, MongoDB, Firestore * Cloud services: AWS (EC2, S3, Lambda, API Gateway, RDS, DynamoDB, SES, SQS, SNS, Cloudfront), GCP (Compute Engine, App Engine, Cloud Storage, Cloud SQL, Pub/Sub, Cloud Functions), Firebase * Front-end: React.js/Vue.js - Data Engineering * Apache Airflow with Celery, Redis * Elasticsearch, Logstash, Kibana * AWS Data Engineering Services - S3, Redshift, RDS, DynamoDB, Lambda, Kinesis, Athena, QuickSight, AWS Data Pipeline, Amazon Managed Workflows for Apache Airflow * GCP Data Engineering Services - BigQuery, Cloud Dataflow, Cloud Pub/Sub, Cloud Storage, Cloud SQL, Cloud Functions, Cloud Composer, Cloud Run * Kubernetes on Digital Ocean, AWS and GCP - NLP & Computer Vision with ML/DL * Natural Language Processing: Embedding feature extraction, Semantic meaning analyzing and classification, Similarity analyzing * Computer Vision: Image filtering, Geometric or radiometric calibration, Lens distortion, Stabilization, Stitching, Similarity analyzing, Object detection, Recognition, Tracking, Identification, Segmentation * Chatbot: RASA, Google Dialogflow * Libraries and frameworks: Spacy, NLTK, Gensim, Tensorflow, Keras, PyTorch, Sklearn If you want to turn your ideas into working software and make your business thrive, please feel free to contact me. Cheers!
Verifications
On time
61%
On budget
100%
Accept rate
100%
Repeat hire rate
25%

Portfolio

Portfolio

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5.0 · 6 Reviews
Reviews
M
He is a good guy but needs training.
Closed User
@Munzer1
Flag of
,
2 months ago
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K
good at scraping , but not in the format i was looking for.
Keith T.
@keitht5
Flag of
Cowdenbeath, United Kingdom
2 months ago
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M
Chang did the job very well. We will hire again.
Maria G.
@mdimi
Flag of
Sandanski, Greece
1 year ago
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The best freelancer i've worked with. Only person I go to for nearly any task/
Ahmed A.
@mzhao224
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Chicago, United States
4 years ago
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Excellent work, needed the project done asap and he delivered with great quality on time within a day. Will definitely be coming to him again. There aren't many people on freelancer that are as well qualified in production quality ETL development as Chang
Ahmed A.
@mzhao224
Flag of
Chicago, United States
4 years ago
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