Software Engineer jobs in Missouri

Cigna

Full-time · 9 locations

This role advises on software engineering quality and technical standards across data and analytics platforms, working with architects and development teams to guide implementation and resolve complex technical issues. It suits experienced Java developers who want a more strategic position focusing on code quality, deployment planning, and cross-team collaboration.

Listed on Cigna’s careers site · Apply there ↗

Mastercard

Full-time · 4 locations · $170,000 – $281,000

This Principal Software Engineer role leads the architectural vision for Mastercard's SME partnerships platform, designing cloud-native systems that handle global transaction volumes at scale. The position suits experienced backend engineers with deep financial services expertise who want to mentor teams and shape platform strategy across a worldwide organization.

Listed on Mastercard’s careers site · Apply there ↗

Boeing

Full-time · 4 locations · $105,000 – $128,140

This role involves building weapon planning software for the Department of Defense's next-generation mission system, working within a scrum team to develop microservices-based applications using JavaScript, React, and C#. It suits mid-to-senior engineers with defense or aerospace experience who are comfortable with classified work and can obtain a security clearance.

Listed on Boeing’s careers site · Apply there ↗

Cigna

Full-time · 7 locations · $130,200 – $217,000

This role leads a platform team building REST-based microservices and data pipelines in a healthcare technology environment, using Java, Spring Boot, and AWS cloud infrastructure. It suits experienced backend engineers who want to mentor others and shape architectural decisions for a large healthcare organization.

Listed on Cigna’s careers site · Apply there ↗

LSEG

2 locations

This role builds market data infrastructure and financial systems at a major exchange, working with C++ to develop high-performance trading and market logic code. It suits engineers with 2+ years of C++ experience who want to work on low-latency financial systems alongside collaborative teams.

Listed on LSEG’s careers site · Apply there ↗

Boeing

Full-time · 7 locations · $82,000 – $89,000

This role develops software for F-15 Mission Planning systems at Tapestry Solutions (a Boeing company), working with C#, JavaScript, and SQL in an Agile environment. It suits junior developers with some experience in object-oriented programming and version control who want to contribute to defense technology.

Listed on Boeing’s careers site · Apply there ↗

Mastercard

Full-time · 21 locations · $115,000 – $184,000

A senior-level individual contributor role focused on designing and building scalable distributed systems while mentoring junior engineers. This position suits experienced Java backend developers who want to take on architectural responsibilities and grow as technical leaders without moving into pure management.

Listed on Mastercard’s careers site · Apply there ↗