Top Software Engineer Jobs in Peoria, IL

Develop and maintain backend services and RESTful APIs using .NET Core/.NET 5+, collaborate with React frontend teams, write unit and integration tests, query SQL Server/PostgreSQL databases, participate in code reviews and agile processes, and use AI-assisted development tools to improve productivity.

Develop, maintain, and operate Mission Control web app and supporting microservices for satellite operations. Design and implement HTTP APIs, deploy critical infrastructure, and improve automation. Collaborate with cross-functional teams to ensure satellite scheduling, telemetry processing, and operational tooling meet mission needs. Support CI/CD, testing, and database-backed services.

Build, maintain, and operate cloud-based services and automation for satellite operations. Manage infrastructure, design/deploy critical systems, support microservices and CI/CD workflows, ensure reliability and SLAs, collaborate with cross-functional teams to minimize operational burden and automate satellite operations.

Build and scale backend systems and APIs for Segment CDP, collaborate with product and design, identify performance bottlenecks, improve reliability, participate in on-call rotation, and drive architectural decisions balancing velocity and stability.

Develop database applications and interfaces by creating tables and understanding technical documentation in a small team environment.

Lead technical strategy and architecture for Coinbase's Blockchain Platform, overseeing nodes, indexers, wallets, and asset lifecycle. Drive cross-team platform rearchitectures, enforce security and reliability standards, champion AI-driven automation, use observability to improve reliability, and represent the platform to executives to secure alignment and resources for large-scale blockchain infrastructure initiatives.

As a Senior Software Engineer in ZT1, you will lead backend system development, manage projects, and influence product direction in a fast-paced, AI-centric environment.

Responsible for leading a team to improve developer productivity, managing projects, and ensuring high-quality code delivery while collaborating across teams.

Design and build scalable, reliable backend systems and third-party integrations for provider-patient workflows and telehealth. Drive development lifecycle, solve complex technical challenges, and collaborate cross-functionally to ensure performance, security, and availability.

Design, build, and operate multi-tenant elastic storage control-plane services. Ensure high availability and performance, run observability and on-call practices, lead complex projects, collaborate cross-functionally, mentor junior engineers, and contribute to scaling services handling petabytes of data.

Lead long-term technical strategy and execution across multiple teams, architecting and evolving foundational frontend/backend systems and platforms at massive scale. Drive AI/ML adoption, solve ambiguous, high-impact problems, remain hands-on in critical system design and implementation, and align senior leaders on roadmaps and engineering standards.

Build and scale customer-facing and backend systems for Upstart's Auto Secured Personal Loan product. Design eligibility, decisioning, funnel and workflow automation, collaborate with product, risk, and operations, deliver reliable production software in a regulated environment, and drive technical direction and observability for long-term platform expansion.

Develop and maintain Java applications for DoD systems, focusing on backend services, REST APIs, and microservices, while ensuring security and performance.

The Software Engineer will design, build, and maintain software solutions for healthcare reporting and compliance, ensuring high quality and performance while collaborating with various teams. Strong SQL and .NET skills are required.

The Software Engineer will develop customer-facing integrations, build APIs, enhance security, and improve system reliability while collaborating with multiple teams.

Contribute to the design and implementation of SMTP relay infrastructure, ensuring performance and reliability for email services and collaborating with teams to meet customer needs.

The Software Engineer II will develop and maintain software products, design systems, ensure quality and security, and guide teams in software solutions.

Design, develop, and optimize platform-level embedded software and reusable frameworks for telecom products (including 5G). Collaborate across systems teams, perform architecture and code reviews, support integrations with customers/partners, and mentor engineers while ensuring performance, scalability, and reliability on heterogeneous processors.

Design, build, and operate highly available, high-throughput backend services for Twilio SendGrid. Modernize Go-based microservices, manage dual-cloud AWS/Azure infrastructure with Terraform, improve observability and reliability, mentor engineers, and balance feature delivery with platform refactoring.

Design and evolve data pipelines, ensure accuracy of business datasets, improve data reliability, and partner across teams to provide insights and solutions.

As a Software Engineer III, you'll develop custom software for government clients, teaching Agile practices, delivering software solutions, and ensuring client satisfaction through collaboration and feedback.

Develop and maintain a next-generation platform SDK and API suite. Own development tasks end-to-end, define work items, contribute to quality frameworks, and participate in code reviews to deliver well-tested, performant software.

The Software Engineer will design and maintain networking software services for secure connectivity, improve system reliability, partner cross-functionally, and debug production issues.

As a Software Engineer II, you will design, build, and maintain applications for a healthcare quality data platform, collaborating with teams to develop features and ensure high standards of performance and security.

As a Principal .NET Software Engineer at Versapay, you will modernize payments infrastructure, improve scalability, design distributed services, and take ownership of payment workflows while collaborating with various teams to enhance customer experience.