Top Software Engineer Jobs in Peoria, IL

Design, build, and operate low-latency authentication and authorization services (OAuth, sessions, tokens, 2FA, account recovery). Lead technical designs, ensure strong security and observability, collaborate cross-functionally, simplify integrations, and mentor engineers while running production services with measurable SLOs.

Lead design and delivery of large-scale distributed systems for Catering & Events. Own architecture, drive technical strategy, mentor engineers, collaborate with Product and Design, ensure scalability, reliability, observability, and champion AI adoption to improve developer productivity and product capabilities.

Lead design and implementation of Headway's insurance systems (eligibility, pricing, matching, claims). Build data-intensive, ML-powered platforms and automation, mentor engineers, write high-impact code, and improve accuracy and reliability across state and payer complexity to scale insurance-covered therapy.

As a Senior Principal Engineer, you'll define and drive the technical strategy for customer experience platforms, lead architectural decisions, and mentor engineering teams to enhance customer and agent experiences.

Build and maintain on-chain smart contracts and backend services for branded USDC-backed stablecoins. Own issuance, reserves, mint/burn, and rewards systems; drive architecture, security, and operational excellence; ship features with product and design partners and ensure well-tested, auditable production deployments.

Lead design, build, deployment, and operation of highly resilient, high-throughput configuration and publishing systems. Define long-term architecture and strategy, mentor senior engineers, diagnose and fix performance bottlenecks, and leverage AI tools to improve engineering productivity and platform capabilities.

Lead technical strategy and architecture for Affirm Bank's cloud, data, vendor integrations, and operational tooling. Design, build, and operate high-stakes systems end-to-end, own incident response, vendor selection, and the Bank↔Affirm Inc integration boundary. Ensure examiner-ready documentation, compliance, reliability, and observability while mentoring engineers and pushing AI-assisted engineering practices to increase velocity and product safety.

Design, build, and operate scalable, secure data platform infrastructure for ingesting, processing, cataloging, and accessing petabytes of data. Improve Spark/Databricks reliability and developer experience, build ingestion/replication systems, develop internal libraries and tooling (Go/Python), and collaborate with cross-functional teams to support analytics, ML, and customer-facing data products.

As a Senior Software Engineer, you'll design, develop, and maintain full-stack applications, utilizing TypeScript and modern frameworks while collaborating cross-functionally to enhance user experience and performance.

Design and build scalable frontend features and reusable UI components using React and TypeScript. Collaborate with PMs, designers, and backend engineers on architecture, state management, API integration, performance, accessibility, and testing. Drive best practices for CI/CD, code quality, documentation, planning, and user experience.

Lead design and delivery of a reliability platform for production systems. Own quarterly goals, guide engineers through ambiguity, collaborate with PM/design/analytics, monitor and operate services (on-call), set quality and code standards, and mentor teammates. Integrate AI/LLM tooling to improve automation, debugging, and service health.

Lead delivery for the Batch Infrastructure team: design, build, and operate reliable, scalable compute platforms for scheduled and on-demand batch workloads. Collaborate with product/design/analytics, define technical plans, ensure availability (monitoring/on-call), set code and design standards, and mentor engineers to improve delivery and quality.

Lead frontend development using React and TypeScript to design scalable frontend architecture, components, and developer workflows. Own feature delivery from concept to launch, improve CI/CD and testing, collaborate with backend on APIs, evaluate new technologies, and mentor other engineers while ensuring performance, accessibility, and reliability across web surfaces.

Design, build, and optimize Java-based data pipelines and integrations from SQL/NoSQL and cloud sources. Create BI dashboards and automated reports, design storage for structured/unstructured data, document processes, and follow production deployment best practices to deliver actionable analytics.

Design and build cloud-native ETL/ELT pipelines and microservices, modernize on-prem systems to distributed services, implement authentication/authorization and data governance, ensure data quality and observability, drive architecture and CI/CD best practices, mentor engineers, and collaborate with stakeholders across a US Navy-focused defense program.

Design, develop, and operate monitoring and observability solutions for flagship supercomputers. Build data pipelines to process large telemetry and logs, respond to incidents, implement mitigations, write postmortems, and improve reliability, performance, and operational runbooks at scale.

Design, implement, and operate large-scale, low-latency cloud data processing systems on OCI. Contribute across the software lifecycle, optimize data pipelines, ensure high availability and disaster recovery, and collaborate on design, deployment, monitoring, and production support.

Build and maintain WordPress-based customer websites for bookings and reservations. Implement custom themes, plugins, and integrations with Newbook via REST APIs. Use AI-assisted development tools to accelerate coding, testing, debugging, and documentation. Collaborate on architecture, CI/CD interactions, performance, accessibility, SEO, and security. Write tests, reduce technical debt, and work cross-functionally to deliver reliable production software.

Develop, test, and maintain software components; participate in requirements analysis, design, architecture, integration, and project activities; diagnose and fix bugs; collaborate with architects, designers, and product managers; build scalable REST APIs and work with databases, search technologies, and modern front-end frameworks.

Design, build, and maintain compliance program workflows, carrier integrations, frontend UIs and backend APIs for high-volume, highly available messaging systems. Develop scalable solutions, operate cloud services, collaborate cross-functionally, and drive architecture and quality improvements.

Lead backend engineering for cloud-native, event-driven data pipelines and customer integrations (especially EHRs). Evolve core data models and APIs, improve scalability and reliability, mentor engineers, define best practices, and drive end-to-end testing and AWS-based solutions.

Design, build, and maintain Azure-based full-stack skilling platforms and CI/CD pipelines. Implement scalable microservices, REST APIs, automation, and AI/LLM features, improve site reliability, automate testing, and collaborate across teams to ensure secure, high-quality production deployments.

Build, operate, and scale tier-0 backend services that ingest and process billions of emails daily. Design and deliver backend features, improve system stability, performance, and scalability, collaborate across R&D, participate in on-call rotations, and drive operational excellence and knowledge sharing.

Build and ship full-stack features across a TypeScript/React frontend and TypeScript/Python backend. Own integrations and backend services (LoanPro, HubSpot), add tests and monitoring, resolve production issues, participate in code review and planning, and use AI tooling to automate and increase development velocity.

Develop, test, and support web quoting features for Digital Sales using C#/.NET and TypeScript. Implement scalable, secure code, automated tests, telemetry, and participate in on‑call rotation. Mentor junior engineers, monitor product metrics, and contribute to CI/CD, deployment, and operational readiness.