Top 24 Data developers Jobs in O'fallon, Mo

Mid-Level SQL Engineer
Leidos —St. Louis, MO
- $87,100 - $157,450 a year
- Full-time
- Computer Science
- Mid-level
- Master's degree
Data Engineer
Strategic Staffing Solutions —St. Louis, MO
- Contract
- Hybrid work
- 7 years
- Azure
- SQL
- Health insurance
Quick Apply
22h
Database Conversion (ETL) Associate
National Information Solutions Cooperative (NISC) —Lake Saint Louis, MO
- Hybrid work
- Data analysis skills
- Research
- Mid-level
Data Engineer
Tata Consultancy Services —O'Fallon, MO
- $100,000 - $140,000 a year
- Java
- Senior level
Data Engineer
nimble —Chesterfield, MO
- Full-time
- Remote
- HIPAA
- Mid-level
- SQL
Quick Apply
Data Engineer - III
Noise Consulting Group, Inc —St. Louis, MO
- $60 - $65 an hour
- Contract
- Hybrid work
- 7 years
- Azure
- Office
Quick Apply
1d
Data Engineer Team Lead
Robotics Technologies —Saint Paul, MO
- SQL
- Continuous improvement
- US work authorization
Senior Software Engineer (Big Data)
Mastercard —O'Fallon, MO
- $115,000 - $184,000 a year
- Online Application
- Computer science
- Computer Science
- Bachelor of Science
- Paid jury duty
- Health savings account
Data & AI Solution Engineer
Flexential Corp —Wildwood, MO
- Remote
- System design
- Mid-level
- 3 years
- Wellness program
- Health savings account
Quick Apply
Big Data Dev/Spark Scala Engineer
Tata Consultancy Services —O'Fallon, MO
- $80,000 - $110,000 a year
- Computer Science
- SQL
- Experience equivalent to degree accepted
- Commuter assistance
- Health insurance
Senior Data Engineer (Apache Spark, NiFi, SQL)
Mastercard —O'Fallon, MO
- $140,000 - $231,000 a year
- Online Application
- 6 years
- Java
- SQL
- Paid jury duty
- Health savings account
Computer Systems Analyst, Fulltime , 40 hours per week
I3GlobalTech —St. Louis, MO
- $137,322 a year
- Full-time
- Computer Science
- Mid-level
- Office
Data Engineer
Absolute Business Solutions Corp —St. Louis, MO
- $120,000 - $150,000 a year
- 8 hour shift
- Hybrid work
- 5 years
- Military encouraged
- Experience equivalent to degree accepted
- Paid time off
- 401(k) matching
Commercial Data Integration Platform - Lead Developer
Mastercard —O'Fallon, MO
- $140,000 - $231,000 a year
- Online Application
- Mentoring
- Senior level
- Communication skills
- Paid jury duty
- Health savings account
Senior Data Analyst - Archimedes
Navitus Health Solutions, LLC —Earth City, MO
- Full-time
- Remote
- Office
- SQL
- Bachelor's degree
6d
BI Developer
Sunset Transportation, LLC —St. Louis, MO
- Computer science
- Computer Science
- Mid-level
Quick Apply
Data Engineer - Archimedes
Navitus Health Solutions, LLC —Earth City, MO
- Full-time
- Computer Science
- 5 years
- HIPAA
6d
Data Engineer, Data Solutions
NISA Investment Advisors, LLC —St. Louis, MO
- Full-time
- Computer Science
- Customer service
- Office
- Wellness program
- Tuition reimbursement
Python Engineer Manager
Kemper Insurance —St. Louis, MO
- $99,000 - $164,800 a year
- Azure
- Management
- Computer Science
- Health insurance
- Dental insurance
Quick Apply

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Mid-Level SQL Engineer

Leidos -
St. Louis, MO

Apply Now

Job Details

Full-time
$87,100 - $157,450 a year

Qualifications

Data integrity assurance
SQL
Data quality management
Query management

Full Job Description

Description

If you’ve been building your skills in SQL, data engineering fundamentals, and mission‑driven development, and you’re ready for work that actually moves the needle, this is the kind of opportunity cleared engineers pursue when they want to grow while making real impact. If you take pride in your craft, enjoy solving meaningful data problems, and want your work to support a mission with visibility at senior levels, you’ll thrive here.

We’re hiring a SQL Engineer to support a high‑visibility, data‑driven application that powers analytics and reporting across the organization. In this role, you’ll write complex queries, shape data for dashboards, ensure data accuracy, and deliver reliable datasets that stakeholders depend on every day. You’ll work closely with dashboard developers and application teams to provide clean, consistent, and easy‑to‑consume data for mission users. Our primary development team operates out of Gaithersburg, MD, but innovation doesn’t stop there. We’re able to support onsite engineers in Alexandria, VA; Aurora, CO; St. Louis, MO; and Tucson, AZ, giving top talent multiple paths to join the mission.

And while the requisition requirements may seem standard fare, the position is not; as it will join a high performing team that is changing the way digital engineering and mission operations intelligence is enabled for our customer.

Why This Role Stands Out

High Impact: Your work directly supports a widely used application that drives real-time decision-making
High Visibility: Partner with engineering teams and key stakeholders across programs
Career Growth: Expand your expertise in large-scale data systems, performance optimization, and advanced SQL engineering
Challenging Work: Tackle complex data problems, not routine queries

Essential Responsibilities

SQL Development: Write complex SQL queries involving joins, aggregations, filtering, subqueries, and window functions to support dashboards
Data Shaping for Visualization: Structure query outputs in a way that is optimized for dashboard consumption (clear naming, grouping, formatting)
Dashboard Support: Partner with dashboard developers to define and deliver the data required for visualizations and reporting
Data Validation: Ensure accuracy, consistency, and completeness of datasets used in dashboards
Query Performance: Identify inefficient queries and make basic improvements to support responsive dashboards
Requirements Translation: Translate dashboard and reporting requirements into effective SQL queries

Basic Qualifications

Bachelor’s degree in computer science, Software Engineering, or related field with 4–8 years of experience; or Master’s with 2–6 years
US Citizenship
Active TS/SCI with ability to successfully pass a Polygraph
Strong SQL skills, including the ability to write advanced queries (joins, aggregations, subqueries, window functions)
Experience working with enterprise relational databases (PostgreSQL, MySQL, Oracle, etc.)
Background supporting analytics, dashboards, or reporting pipelines
Comfortable working in Linux‑based environments
Proven ability to work independently on data‑centric tasks and ensure data quality

Preferred Qualifications:

Experience with Grafana, Tableau, or similar visualization tools
Exposure to CI/CD pipelines
Experience working in Agile environments

#MARU

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting:

April 16, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:

Pay Range $87,100.00 - $157,450.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

About Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.

Securing Your Data

Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system – never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at [email protected].

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

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Refine Your Search

data developers jobs in o'fallon, mo

Mid-Level SQL Engineer

Data Engineer

Database Conversion (ETL) Associate

Data Engineer

Data Engineer

Data Engineer - III

Data Engineer Team Lead

Senior Software Engineer (Big Data)

Data & AI Solution Engineer

Big Data Dev/Spark Scala Engineer

Senior Data Engineer (Apache Spark, NiFi, SQL)

Computer Systems Analyst, Fulltime , 40 hours per week

Data Engineer

Commercial Data Integration Platform - Lead Developer

Senior Data Analyst - Archimedes

BI Developer

Data Engineer - Archimedes

Data Engineer, Data Solutions

Python Engineer Manager

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