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Software Engineer Jobs in Festus, MO (NOW HIRING)

Merck Group

Staff Software Engineer

Saint Louis, MO · On-site

$110K - $165K/yr

  • Medical

  • Retirement

  • PTO

This role is software engineering first, with a strong emphasis on designing reliable systems that ingest, process, and serve data to power modern applications and AI-driven solutions. You will work ...

MiTek USA Inc

Software Engineer

Chesterfield, MO · On-site +1

  • Medical

  • Dental

  • Vision

  • Retirement

  • PTO

Job Responsibilities & Requirements We are seeking a Software Engineer to help design, build, and evolve software solutions for customers in the building industry. You will work within a cross ...

London Stock Exchange Group

Software Engineer

Saint Louis, MO · On-site

$95K - $159K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

... software development experience • Experience developing in C++ and/or other Object Oriented programming languages, in a multi-threaded environment and real-time streaming type applications. • ...

Maritz Loyalty Marketing

Software Engineer II

Fenton, MO

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

The Software Engineer II supports the development of software that serves Maritz technology, working closely with and under the guidance of fellow engineers on the team. In this role, you will help ...

The Timberline Group

Senior Software Engineer

Saint Louis, MO · On-site +1

$119K - $157K/yr

We are looking for a Senior Software Engineer to produce and implement functional software solutions. You will work with upper management to define software requirements and take the lead on ...

Work Life Limbo

Principal Software Engineer

Chesterfield, MO · On-site

$133K - $179K/yr

Seeking a Principal Software Engineer to build and modernize digital commerce and enterprise platforms. This role is ideal for someone who thrives in a small, fast-moving team, where you'll be ...

Maritz

Software Engineer I

Fenton, MO · On-site

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

The Software Engineer I supports the development of software that serves Maritz technology, working closely with and under the guidance of fellow engineers on the team. In this role, you will help ...

Nidec Corporation

Software Engineer I

Saint Louis, MO · On-site

Louis, MO . The Software Engineer I supports Desktop application development, database interaction, Microprocessor Embedded code, and internal equipment development. Work within a team, from ...

AVALA Marketing Group

Senior Software Engineer

Saint Louis, MO · On-site

$119K - $157K/yr

  • Retirement

  • PTO

We hire software engineers and technology enthusiasts who enjoy being challenged by problems of scale and complexity, with a strong desire to make services better for users. With long term and a ...

AVALA Marketing Group

Senior Software Engineer

Saint Louis, MO · On-site

$119K - $157K/yr

  • Retirement

  • PTO

We hire software engineers and technology enthusiasts who enjoy being challenged by problems of scale and complexity, with a strong desire to make services better for users. With long term and a ...

The Timberline Group

SOFTWARE ENGINEER

Saint Louis, MO · On-site +1

Work with software lead to understand requirements and translate into technical specification for ... Proactively engage with more senior developers for help. Specific Skills may include * Custom ...

MarketVolt

Software Developer

Saint Louis, MO · On-site

  • Medical

  • Retirement

  • PTO

... Engineer / Web Application Developer MarketVolt, LLC, a digital marketing software and services firm based in St. Louis, seeks a creative software developer who can thrive in a fast-paced, customer ...

Marketvolt

Software Developer

Saint Louis, MO · On-site

  • Medical

  • Retirement

  • PTO

... Engineer / Web Application Developer MarketVolt, LLC, a digital marketing software and services firm based in St. Louis, seeks a creative software developer who can thrive in a fast-paced, customer ...

Armaninollp

Senior Software Engineer

Saint Louis, MO

$119K - $157K/yr

  • Medical

  • Dental

  • Vision

  • Retirement

  • PTO

We are seeking a highly skilled Full-Stack Senior Software Engineer to join our team. In this role, you will design, develop, and maintain modern web applications across the stack. The ideal ...

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Showing results 21-40

All JobsSoftware Engineer JobsSoftware Engineer Jobs in Festus, MO

Software Engineer information

See Festus, MO salary details

$53.9K

$125.2K

$174.4K

How much do software engineer jobs pay per year?

As of Aug 14, 2026, the average yearly pay for software engineer in Festus, MO is $125,208.00, according to ZipRecruiter salary data. Most workers in this role earn between $101,800.00 and $146,800.00 per year, depending on experience, location, and employer.

Are software engineers still in demand?

Software engineers are currently in high demand due to ongoing digital transformation across industries, with strong growth projected in areas like cloud computing, cybersecurity, and AI. Skills in programming languages such as Python, Java, and experience with agile development increase employability in this field.

What is a software engineer?

Software Engineers are professionals who design, develop, test, and maintain computer software and systems. They use programming languages, engineering principles, and problem-solving skills to build applications, websites, or software solutions that meet specific needs. Software Engineers may work in a variety of industries, such as technology, finance, healthcare, or entertainment, collaborating with other team members to deliver functional and reliable software. Their role often involves analyzing user requirements, writing code, debugging errors, and continually improving software performance.

What are some common challenges software engineers face when collaborating on large development teams?

Software engineers working on large teams often encounter challenges with communication, code integration, and maintaining consistent coding standards. Coordinating across multiple developers can lead to merge conflicts and misunderstandings about project requirements or priorities. Adopting tools like version control systems, regular code reviews, and clear documentation helps mitigate these issues. Building strong collaboration skills and proactively seeking clarification are key to ensuring smooth teamwork and project success.

Are software engineers still in high demand?

Software engineers remain in high demand due to ongoing digital transformation across industries, with skills in programming languages, cloud computing, and cybersecurity highly sought after. The job market is expected to grow faster than average, with opportunities in various sectors including technology, finance, and healthcare.

Is 25 too late to become a software engineer?

Age is not a barrier to becoming a software engineer; many professionals start in their mid-20s or later. Success depends on acquiring relevant skills, such as programming languages and problem-solving, often through coding bootcamps, degrees, or self-study, and gaining practical experience. Employers value skills and experience over age, making it possible to enter the field at 25 or older.

What are the key skills and qualifications needed to thrive as a software engineer, and why are they important?

To thrive as a Software Engineer, you need strong programming skills, problem-solving abilities, and a degree in computer science or a related field. Familiarity with coding languages (such as Python, Java, or C++), version control systems like Git, and knowledge of software development methodologies are typically required. Excellent teamwork, communication, and adaptability distinguish top performers in this role. These skills ensure efficient, high-quality software development that meets user needs and adapts to technological changes.

What is the difference between Software Engineer vs Software Developer?

AspectSoftware EngineerSoftware Developer
CredentialsBachelor's degree in CS or related field, certificationsBachelor's degree often preferred, certifications optional
Work EnvironmentDesigning, developing, testing, and maintaining software systemsWriting, coding, and implementing software applications
Industry UsageUsed across tech, finance, healthcare, and more for system-level rolesCommonly used in app and web development projects
Search IntentUnderstanding roles, responsibilities, and qualificationsLearning about coding, programming, and project work

While both roles involve software creation, Software Engineers typically focus on designing and architecting complex systems, whereas Software Developers mainly concentrate on coding and building specific applications. The roles often overlap, but the Engineer role may require broader system knowledge and design skills.

What do software engineers do for a job?

Software engineers design, develop, test, and maintain software applications and systems. They use programming languages, tools, and frameworks to create solutions that meet user needs and technical requirements, often collaborating with teams and following project deadlines.
More about Software Engineer jobs

What are the most commonly searched types of Software Engineer jobs in Festus, MO?

The most popular types of Software Engineer jobs in Festus, MO are:

What cities near Festus, MO are hiring for Software Engineer jobs?

Cities near Festus, MO with the most Software Engineer job openings:

Software Engineer jobs near you
Infographic showing various Software Engineer job openings in Festus, MO as of August 2026, with employment types broken down into 100% Full Time. Highlights an 100% In-person job distribution, with an average salary of $125,208 per year, or $60.2 per hour.

Staff Software Engineer

Merck Group

Saint Louis, MO • On-site

$110K - $165K/yr

Full-time

Medical, Retirement, PTO

Posted 23 days ago

Job description

Work Your Magic with us! Start your next chapter and join MilliporeSigma.
Ready to explore, break barriers, and discover more? We know you've got big plans - so do we! Our colleagues across the globe love innovating with science and technology to enrich people's lives with our solutions in Healthcare, Life Science, and Electronics. Together, we dream big and are passionate about caring for our rich mix of people, customers, patients, and planet. That's why we are always looking for curious minds that see themselves imagining the unimaginable with us.
This role does not offer sponsorship for work authorization. External applicants must be eligible to work in the US.
Your Role:
We are looking for a Staff Applied AI Engineer to build scalable, production-grade backend applications that leverage large and complex datasets. This role is software engineering first, with a strong emphasis on designing reliable systems that ingest, process, and serve data to power modern applications and AI-driven solutions.
You will work closely with product managers, software engineers, data scientists, and ML engineers to build robust backend services, data-intensive applications, and production AI systems. Success in this role requires strong software engineering fundamentals, practical experience working with data throughout its lifecycle, and the ability to design systems that are scalable, maintainable, and reliable in production.
Essential Job Functions:
  • Lead technical strategy for AI/LLM systems across multiple products
  • Architect retrieval, orchestration, agentic, and evaluation systems that run reliably in production
  • Set the standards for AI safety, evaluation, observability, and responsible rollout in a regulated context
  • Mentor Junior-level engineers into strong AI engineers; Employ AI Native development skills to multiply the productivity (Claude, etc.)
  • Lead the frontier: evaluate new models, techniques, and tools, and bring the right ones into the team
  • Design, develop, and maintain scalable Python applications and backend services.
  • Build systems that ingest, validate, transform, and manage structured and unstructured data in production environments.
  • Design data models and storage solutions that support scalable, high-performance applications.
  • Develop reusable components for data processing, validation, enrichment, and feature generation.

Who You Are
Minimum Qualifications:
  • Bachelor's degree in Computer Science, Engineering, Data Science, or a related quantitative field.
  • At least 3 years of hands-on experience in machine learning, data science, search relevance, or ranking systems.

Preferred Qualifications:
  • 10+ years of software engineering experience, with deep recent time leading production AI/LLM systems
  • Proven expertise in Python and ML frameworks (MLFlow, TensorFlow, PyTorch, Scikit- learn, or equivalent).
  • Strong background in statistical analysis, data exploration, and working with large-scale datasets.
  • Experience with feature engineering, data preprocessing, and data
  • Seasoned hands-on coder; still writes production Python regularly
  • Seasoned system designer for AI systems at scale - retrieval, agents, evaluation, latency, and cost, vector databases/pipelines
  • Strong experience building and maintaining production-grade backend applications.
  • Experience designing and developing RESTful APIs and distributed systems.
  • Strong SQL skills and experience working with relational databases; familiarity with NoSQL databases or modern data storage technologies is a plus.
  • Solid understanding of data engineering fundamentals, including data quality, validation, transformation, modeling, and efficient storage.
  • Experience designing systems that process large datasets reliably and efficiently.
  • Experience with cloud platforms such as Google Cloud Platform (GCP) or AWS.
  • Experience using Docker, Git, CI/CD pipelines, automated testing frameworks, and modern software engineering best practices.
  • Core engineering stack
  • Languages: Python, REST API, Pandas, NumPy
  • Cloud and infrastructure: AWS Services and/or GCP, Kubernetes, Bedrock
  • Distributed systems: event-driven architectures, including Kafka
  • Orchestration Frameworks: LangGraph, LangChain, AirFlow, etc.
  • Vector Databases like Qdrant

Nice to have Skills:
  • Experience with Kubernetes and container orchestration.
  • Familiarity with event-driven architectures and messaging platforms such as Kafka.
  • Familiarity with ML model deployment and inference pipelines

Location
This role can be based in either our St. Louis, MO or Burlington, MA office and requires a weekly onsite presence
Pay Range for this position: $110,500 - $165,900. The offer range represents the anticipated low and high end of the base pay compensation for this position. The actual compensation offered will be determined by factors such as location, level of experience, education, skills, and other job-related factors. Position may be eligible for sales or performance-based bonuses. Benefits offered by the Company include health insurance, paid time off (PTO), retirement contributions, and other perquisites. For more information click here: https://careers.emdgroup.com/us/en/benefits
What we offer: We are curious minds that come from a broad range of backgrounds, perspectives, and life experiences. We believe that this variety drives excellence and innovation, strengthening our ability to lead in science and technology. We are committed to creating access and opportunities for all to develop and grow at your own pace. Join us in building a culture of inclusion and belonging that impacts millions and empowers everyone to work their magic and champion human progress!
Apply now and become a part of a team that is dedicated to Sparking Discovery and Elevating Humanity!

Apply