Top Software Engineer Jobs in St. Louis, MO

Lead AWS architecture across multiple projects, owning cloud solution design, infrastructure, security boundaries, data platforms, and AI integrations. Establish Infrastructure as Code and engineering standards, conduct code reviews, mentor developers, estimate work, and guide agile teams. Translate technical trade-offs into business value, document designs, assess deliverables before deployment, and support production-grade delivery using serverless, data, and machine learning technologies.

Leads Tea’s engineering organization and strategy, overseeing technical direction, architecture, delivery, hiring, mentoring, and team growth. The role partners with executive and cross-functional leaders to build scalable, reliable, secure systems and customer-facing products. Responsibilities include engineering planning, resource allocation, development standards, system design, code reviews, and occasional hands-on development. The leader will balance rapid product delivery with long-term scalability and operational excellence in a high-growth startup environment.

Develop and improve gameplay systems in C++, including character controls, abilities, enemy behaviors, interactive objects, platform features, trophies, and visual effects. Investigate and fix bugs while collaborating with experienced gameplay programmers. The internship provides mentorship and hands-on experience with game development workflows and technical problem-solving.

Leads and develops backend software engineering managers and technical teams, establishes development metrics and delivery processes, and drives high-quality product releases. Partners with design and business teams on customer-centered experiences, facilitates cross-functional planning, mentors employees, improves engineering practices, and supports long-term organizational and product goals.

Build and operate end-to-end, consumer-scale features across backend services, APIs, iOS, and Android for Life360’s Aging in Place vertical. Use AI-native and agentic workflows with LLMs, contribute to architecture and code reviews, participate in on-call response, mentor teammates, and establish AI engineering practices adopted across the organization. Collaborate with product and design while ensuring performance, reliability, accessibility, and member-focused outcomes.

Develop and maintain Ruby on Rails backend systems supporting solar development, value evaluation, and loan servicing. Responsibilities include writing and reviewing code, maintaining CI/CD pipelines, solving complex domain problems, collaborating with Product and company experts, shaping architecture and technical direction, and improving engineering processes as the company scales.

Own and modernize multiple web properties across Next.js, Astro, React, and WordPress. Lead legacy migrations, site consolidation, SEO-safe redirects, and content migration. Design and operate AI-driven agentic workflows for development, publishing, QA, and maintenance, with human review gates. Build CRO programs, A/B and multivariate tests, and maintain GTM, Marketo, and Salesforce integrations while partnering with Marketing, SEO, and Product Marketing.

Build and maintain native Android and iOS systems, ensuring cross-platform consistency. Contribute across web services, databases, testing, deployment, and production support. Collaborate with development teams, follow and improve engineering patterns, and use AI-assisted development tools. The role requires mobile development experience, REST API knowledge, Kotlin, Java, Swift, Android Studio, Xcode, Git, agile practices, and 3–5 years of professional experience.

Build and maintain full-stack donor-facing giving forms, campaign tools, administrative features, and payment flows across Stripe, ACH, and digital wallets. Own features from technical design through deployment, testing, and production support. Collaborate with product, design, and engineering partners in an Agile environment, contribute to code quality and team initiatives, and participate in rotational support and on-call coverage.

Develop and maintain high-scale JavaScript and TypeScript monetization solutions for publisher websites. Own Freestar’s Prebid.js and Prebid Server header-bidding wrapper, including architecture, adapters, modules, releases, and performance. Integrate with Google Ad Manager, GPT, IMA SDK, and programmatic advertising systems. Monitor Core Web Vitals, reliability, and network performance while reviewing code, resolving critical issues, and guiding technical decisions.