611 Jr Software Engineer jobs in Florissant,MO

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Manager, Software Engineering

Mastercard

O Fallon, MO 63368

~ 35 min OnsiteUrgently HiringEducation AssistanceHealth InsurancePaid Time OffRetirement Benefit

Bachelor's degree in Computer Science, Engineering, or a related field (or equivalent experience).
15+ years of experience in software engineering and architecture, including leadership roles on complex, mission-critical platforms.
Proven track record of delivering distributed/scalable systems and high-volume transaction applications.
Experience with fintech, digital payments, authentication, or identity systems.
Strong grounding in security, secure SDLC, PCI considerations, and compliance-driven architecture.
Familiarity with reliability engineering, observability platforms, and operational excellence practices.
Prior leadership in an organization undergoing significant platform evolution or transformation.
Deep understanding of modern software architecture, cloud infrastructure, and service-oriented systems.
Strong grasp of software operations, including monitoring, incident management, and performance tuning.
Experience managing budgets, forecasting, and resource planning.
Exceptional communication, executive presence, and ability to simplify complex technical topics for senior stakeholders.
Exceptional leadership skills with the ability to inspire and influence across all levels of the organization.
Skilled at translating complex technical concepts into clear, actionable plans.

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Entry - Level Software Engineer

Boeing

Saint Louis, MO 63134

~ 25 min OnsiteHealth InsuranceRetirement Benefit

Bachelor's Degree
Ability to obtain a U.S. Secret Security Clearance for which the U.S. Government requires U.S. Citizenship. Ability to obtain Secret U.S. Security clearance post-start.
1+ years of experience with C, C++, C#, Python, Java, or Ada
1+ years of experience with object-oriented programming language
1+ years of experience developing, documenting, and maintaining architectures, algorithms, interfaces, and designs for software systems

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Sr. Project Engineer

MasTec Industrial

Saint Louis, MO 63190

$130,000-$160,000/yr

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Controls/Manufacturing Engineer

Illinois Tool Works

Saint Louis, MO 63129

~ 25 min Onsite

2-5+ years of experience in industrial automation or controls engineering within a manufacturing environment
Strong experience with Allen Bradley PLC platforms (SLC 5/05, ControlLogix, CompactLogix, MicroLogix)
Experience with robotic programming and automation systems
Experience with AC drives, motor control systems, and industrial automation hardware
Proficiency in HMI development (PanelView, Ignition or similar)
Knowledge of industrial communication protocols (EtherNet/IP, Modbus TCP/IP, Remote I/O)
Demonstrated ability to troubleshoot electrical and mechanical systems in a manufacturing environment
Strong understanding of lean manufacturing, root cause analysis, and continuous improvement methodologies
Ability to travel 15-20%

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Vice President, Software Engineering - DMP

Mastercard

O Fallon, MO 63368

Hybrid~ 35 minUrgently HiringEducation AssistanceHealth InsurancePaid Time OffRetirement Benefit

Proven experience as a Director or Vice President of Software Engineering, Architecture, or a comparable senior leadership role.
Demonstrated success leading distributed, global engineering organizations.
Deep expertise in modern application architectures, including APIs, microservices, event-driven systems, batch processing, and data platforms.
Strong hands-on knowledge of technologies such as Java, REST APIs, Kafka, messaging systems (MQ), Spring, CI/CD pipelines (e.g., Jenkins), and cloud platforms (e.g., Pivotal Cloud Foundry or similar).
Proven track record of delivering high-scale, low-latency, highly available platforms in regulated or mission-critical environments.
Experience leading large, complex programs with predictable, on-time, and on-budget delivery.
Strong understanding of SDLC methodologies (Scrum, Kanban, SAFe) and when to apply them effectively.
Expertise in building and operating resilient systems with a focus on security, reliability, testing, observability, and service-oriented design.
Excellent communication and storytelling skills, with the ability to influence executive, business, and technical stakeholders.
Strong analytical thinking and decision-making capabilities in ambiguous and complex environments.
Bachelor's degree in Engineering, Computer Science, Mathematics, or a related quantitative field, or equivalent practical experience.

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Mechanical Engineer II - Product Engineering

Leonardo DRS

High Ridge, MO 63049

~ 42 min OnsiteFlexible ScheduleHealth InsurancePaid Time OffRetirement Benefit

Bachelor's Degree in Mechanical Engineering or related technical field and a minimum of two years experience
U.S. Citizenship required
Engineering or design experience with mechanical equipment, assemblies and components including machined components, welded structures and sheet metal parts
Comfortable and competent writing and creating technical documentation
Competent using MS Office (Word, Excel, Visio, Project, and PowerPoint)

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Region Landfill Engineer

Waste Connections

Saint Ann, MO 63074

~ 20 min OnsiteHealth InsurancePaid Time OffRetirement Benefit

Bring at least 5 years of experience in waste services, civil construction, or mining
Hold a degree in civil or environmental engineering
Possess experience leading large‑scale projects
Being primarily accountable for project outcomes

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