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4476 Principal Java Developer jobs in Chicago,IL

New, Posted 14 hours ago

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Principal Software Engineer

Mastercard

Chicago, IL 60290

RemoteEducation AssistanceHealth InsurancePaid Time OffRetirement Benefit

Extensive experience in designing and delivering large-scale, distributed systems and platforms.
Proven ability to influence technical strategy and drive architectural decisions across multiple teams.
Strong expertise in modern software engineering practices, cloud-native architectures, and AI/data platforms.
Exceptional communication and leadership skills with a track record of mentoring and thought leadership.
Bachelor's degree in Computer Science, Software Engineering, or a related technical discipline.
Data Architecture & Strategy
Focus on designing modern, scalable, governed data ecosystems.
Data strategy and product-aligned data architectures
Modern database technologies and migration away from legacy Oracle
Data lakehouse architectures supporting analytics and ML workloads
Feature catalog / feature engineering platforms
High-Throughput, Low-Latency, and Real-Time Systems
Critical for Mastercard's real-time decisioning and event-driven platforms.
Event streaming and high-throughput data pipelines
Low-latency data technologies (distributed caches, grid replacement)
Real-time transaction processing and sub-second decisioning
Rules engine design and modernization
Cloud Infrastructure, Platform Engineering & DevOps
Driving cloud-native engineering practices and operational excellence.
AWS infrastructure engineering and cloud-native platform patterns
DevOps and platform engineering (automation, CI/CD, observability, GitOps)
ML lifecycle engineering (model training, deployment, refresh, inference)
Deep, progressive experience in software engineering.
Proven technical leadership roles influencing architecture and design across multiple teams.
Proven track record of delivering large-scale, distributed systems and enterprise-grade platforms.

SmartExplore AI is experimental.

New, Posted 15 hours ago

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Principal Software Engineer

Mastercard

Chicago, IL 60290

New, Posted just now

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Product Designer (Design Systems)

TEKsystems

Chicago, IL 60629

$50-$90/hr

RemoteFlexible ScheduleHealth InsurancePaid Time OffRetirement Benefit

4+ years of relevant design experience, with a strong emphasis on production, systems, or design support work
High level of expertise in Figma and maintaining component libraries
Proficiency with Google Workspace tools including Drive, Slides, Docs, and Sheets
Working knowledge of Adobe Creative Cloud tools such as Photoshop, Illustrator, and InDesign
Familiarity with designing for iOS, Android, and web platforms, including platform‑specific considerations
Production design experience with a strong focus on systems and scalability
Advanced proficiency in Figma, including component libraries and file organization
Experience working with design systems and reusable components
Strong prototyping skills using Figma or similar tools
Presentation and deck design experience
Experience designing for web, Android, and mobile platforms
Comfort working with AI‑related or AI‑enabled product surfaces

SmartExplore AI is experimental.

New, Posted 1 day ago

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Principal, Data Engineering (AI)

Launch Consulting Group

Chicago, IL 60290

New, Posted 23 hours ago

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Java Engineer

Outlier

Chicago, IL

$50/hr

2+ years of experience in backend engineering, AI automation, or complex systems integration
Proven ability to build and maintain production-grade software with modular separation (e.g., distinct services for data parsing, logic processing, and reporting)
Strong command of at least two major languages (e.g., Python, JavaScript, Go, or Java)
Experience working with SQL databases
Practical experience building for live, non-mocked environments and handling multi-turn system interactions
Outstanding attention to detail and the ability to provide clear, high-density technical feedback on complex system behaviors
This is a 1099 contract opportunity on the Outlier.ai platform
Because this is a freelance opportunity, we do not offer internships, sponsorship, or employment
You must be authorized to work in your country of residence
If you are an international student, you may be able to sign up for Outlier if you are on a visa

SmartExplore AI is experimental.

New, Posted 1 day ago

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Solution Architect

Aramco

Chicago, IL 60290

Onsite

Bachelor's or Master's degree in Computer Science, Computer Engineering, Information Systems, or a related field.
Minimum of 15 years in IT, with at least 4 years in a Solution Architect or Lead Data Engineer role.
Proven track record of delivering at least two large-scale enterprise data platform migrations or greenfield builds.
Cloud Infrastructure: Expert-level experience with at least one major cloud provider (AWS, Azure, or GCP) and their native data services.
Containerization: Experience with Docker and Kubernetes for deploying data services.
Data Processing: Strong proficiency in batch and stream processing.
Programming: Advanced coding skills in Python, or Java, along with expert-level SQL.
Database Systems: Extensive experience managing and querying various systems: Relational: PostgreSQL, MySQL, SQL Server, NoSQL/NewSQL: MongoDB, Cassandra, Warehousing/Lakehouses: Snowflake, Databricks, BigQuery.
Enterprise Architecture: Knowledge of enterprise architecture principles, including business architecture, information architecture, and technology architecture.

SmartExplore AI is experimental.

New, Posted 1 day ago

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