Citigroup, Inc

Python Developer - NLP, ML, Gen AI - Assistant Vice President

Citigroup, Inc • $94K — $141K *
Mississauga, ON L4T 0A1In-Person
Enterprise Technology
Less than 5 years of experience
Today
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Job Overview by Ladders

Qualifications

  • 3-5 years of Python programming experience
  • Strong Python, OOP, and design pattern fundamentals
  • Experience with NLP libraries like Flair and BERT
  • Solid skills in PySpark, Pandas, and PyArrow
  • Proficient with Parquet files and associated libraries
  • Familiar with fast JSON parsing libraries
  • Experience in building APIs with Flask or FastAPI

Responsibilities

  • Develop and optimize ETL and data processing jobs
  • Work with Parquet files for efficient data handling
  • Implement data parsing and high-performance JSON serialization
  • Build and maintain NLP pipelines using advanced model frameworks
  • Create scalable data ingestion and transformation pipelines
  • Develop Flask-based APIs for model inference
  • Monitor application health and system performance

Benefits

  • Flexible work arrangements
  • Professional development opportunities
  • Access to cutting-edge technology
  • Collaborative team environment
  • Exposure to innovative AI projects
Full Job Description
Role Summary
We are looking for a mid-level Python Developer - NLP, ML, Gen AI with combined experience in Data Engineering andAI/NLP engineering. The candidate will build NLP pipelines using libraries such as Flair, BERT, and LLM frameworks, and will also work on large-scale data processing using PySpark, Pandas, and related data tools. The role includes developing APIs, integrating with platform services, and supporting CI/CD deployments using GitHub and LightSpeed Enterprise.

Key Responsibilities
  • Develop and optimize ETL/data processing jobs using PySpark, Pandas, PyArrow, and related libraries.
  • Work with Parquet files using FastParquet or pyarrow.parquet for efficient data processing.
  • Implement data parsing and serialization using json, ujson, or orjson for high-performance JSON handling.
  • Build and maintain NLP pipelines using Flair, BERT, and LLM-based models.
  • Develop scalable ingestion and data transformation pipelines for AI and analytics use cases.
  • Build and maintain Flask-based APIs for model inference and service integrations.
  • Use regular expressions for text cleaning, parsing, and NLP preprocessing.
  • Integrate caching and fast lookups using Redis.
  • Manage and deploy ML models using MLflow for tracking and versioning.
  • Support CI/CD workflows using GitHub, LightSpeed Enterprise, and deployment pipelines.
  • Create and maintain Autosys JILs for job scheduling and automation.
  • Use basic Linux commands for troubleshooting, operations, and deployment tasks.
  • Monitor application and system health using ITRS Geneos.
  • Write unit tests and improve automation test coverage (PyTest/unittest).
  • Work with REST APIs, microservices, and basic shell scripting.
  • Work with cloud services (ECS), including boto3.


Required Skills
  • 3-5 years of hands-on Python programming experience.
  • Strong fundamentals in Python, OOP, and design patterns.
  • Experience with NLP libraries such as Flair, BERT, HuggingFace Transformers, or similar.
  • Solid experience with PySpark, Pandas, PyArrow, and distributed data pipelines.
  • Proficient in working with Parquet using FastParquet or pyarrow.parquet.
  • Familiarity with fast JSON parsing libraries (json, ujson, orjson).
  • Experience building APIs using Flask (FastAPI is a plus).
  • Experience with MLflow for model tracking and deployment.
  • Good understanding of CI/CD practices and Git workflows.
  • Experience working with Redis or similar in-memory stores.
  • Experience with Autosys JILs for job scheduling.
  • Comfortable with Linux command line and shell scripting.
  • Strong debugging, problem-solving, and teamwork skills.
  • Exposure to cloud services; AWS boto3 experience is an asset.


Nice-to-Have
  • Experience with Polars or Dask for high-performance data processing.
  • Experience with PyTorch or TensorFlow for model training.
  • Experience with Docker, Kubernetes, or containerized deployments.
  • Experience with monitoring tools such as ITRS Geneos.
  • Experience with FastAPI, Airflow, or Prefect.


Job Family Group:
Technology

Job Family:
Applications Development

Time Type:
Full time

Primary Location Full Time Salary Range:
$94,300.00 - $141,500.00

Most Relevant Skills
Please see the requirements listed above.

Other Relevant Skills
For complementary skills, please see above and/or contact the recruiter.

Automated Processing and AI

We use automated processing, including artificial intelligence, for our legitimate business interests (or our reasonable and appropriate business purposes) to identify and align the candidate's skills and abilities with a specific job opening. Additionally, if you so choose, or consent, we can match your skills and abilities to other suitable roles at Citi.

Importantly, all our hiring processes and decisions, including determining your suitability for a role, are conducted, checked, and decided by individuals. Our automated processing and AI do not involve relying on automatic or autonomous decision-making. Please refer to any Jurisdictional Considerations, with specific provisions for your country (where relevant) for further details.

This job opening is for an existing job vacancy.

About Citigroup, Inc

Citigroup is a financial services holding company that provides financial products and services. The company operates through two segments, Global Consumer Banking (GCB) and Institutional Clients Group (ICG). The GCB segment offers traditional banking services to retail customers through retail banking, commercial banking, Citi-branded cards, and Citi retail services. The ICG segment offers various banking, and financial products and services to corporate, institutional, public sector, and high-net-worth clients. This segment provides wholesale banking products and services, including fixed-income and equity sales and trading, foreign exchange, prime brokerage, derivative services, equity and fixed-income research, corporate lending, investment banking, and advisory services, private banking, cash management, trade finance, and securities services. Citi is committed to sustainability and social responsibility, and the company invests in initiatives that promote economic progress.

Citigroup, Inc Careers

Join the vibrant team at Citigroup, Inc, a leading global bank, and propel your career into the future. Citigroup offers a plethora of job opportunities that span across various fields and expertise, making it an ideal place for ambitious professionals to thrive.

Work You’ll Do

At Citigroup, Inc, you will engage in exciting work that matters. Join our team to help innovate and drive transformation in the banking industry. With Citigroup, you can lead initiatives that redefine how banking works and how financial services can empower people globally.

Innovate and Lead

Citigroup, Inc is at the forefront of financial innovation and leadership. By joining our team, you will work alongside top professionals to develop solutions that enhance customer experiences and operational efficiency. Our commitment to innovation is fundamental, and we encourage our team to push boundaries and think outside the box.

Grow Your Career

Citigroup, Inc is not just a company; it's a place where you can grow both professionally and personally. We offer robust career paths and professional development opportunities that help you reach your potential. With diverse career tracks and the support of leadership, your growth at Citigroup is limitless.

Diversity and Inclusion

We believe our strength comes from the diversity of our team. Citigroup, Inc is dedicated to fostering an inclusive workplace where everyone can contribute their best work. Through diversity training and a culture that embraces differences, we create a welcoming environment for all employees.

Benefits and Culture

Citigroup, Inc values the well-being of its employees. We offer competitive benefits packages that support the health, finance, and lifestyle of our team members. Our culture is built on collaboration, respect, and a commitment to excellence. We ensure that every team member feels valued and part of our global family.

Internship and Employment Opportunities

Start your professional journey with Citigroup through our internship programs or full-time job opportunities. We are constantly hiring fresh talent and seasoned experts who bring creativity and innovation to our team. Whether you're refining your skills or ready to lead, there's a position waiting for you at Citigroup.

Networking and Professional Development

At Citigroup, Inc, networking and continuous learning are part of our DNA. We provide platforms for employees to connect with industry leaders and peers, enhancing their skills and opening up new career opportunities. Our leadership programs and professional development initiatives ensure that you are always ahead of the curve.

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Explore the numerous positions available at Citigroup, Inc that match your skills and interests. We are looking for passionate, curious, and solution-driven team players who are ready to make an impact.

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Citigroup, Inc is where your ambition meets opportunity. Join us and transform your career while making a global impact.
Learn more about Citigroup, Inc
Market Cap
$1.3 billion
Industry
Finance & Insurance
Net Income
$89.6 million
Founded
1812
5 Year Trend
+4.6%
NASDAQ
C
* Ladders Estimates

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