Backend Developer Jobs in Missouri, United States

Photon Group Backend Team builds mission‑critical microservices for high‑volume data streams. The role designs and implements scalable Java/Spring Boot services, architecting event‑driven systems with Apache Kafka and deploying containers on AWS EKS. Based in the United States, the position requires on‑site presence with a flexible 9‑5 schedule.

Backend Developer at Baanx will design, build, and maintain high‑performance services for digital asset platforms. The role focuses on Node.js microservices, PostgreSQL data stores, and integration with crypto custodians, exchanges, and other third‑party APIs.

Versatile Backend Developer to design, build, maintain scalable server-side logic for enterprise services and microservices using Java (Spring Boot) and Python (Django/FastAPI). Collaborate with frontend and DevOps, implement REST/GraphQL APIs, optimize SQL/NoSQL databases, ensure security with OAuth2/JWT, write unit/integration tests, optimize performance, participate in Agile ceremonies.

Photon Group is seeking a Java Backend Developer to design, develop, and maintain scalable enterprise backend applications. The role involves building microservices-based architectures, developing RESTful and SOAP web services, implementing security best practices, optimizing performance, and collaborating with cross-functional teams including architects and product owners.

Backend Engineering at Bjak builds the core systems behind the AI Neobank app, delivering reliable APIs and financial product infrastructure at scale. The role designs, implements, and maintains backend services for onboarding, payments, KYC, and risk flows while collaborating with product, frontend, mobile, and AI teams.

Photon Group’s Backend Engineering team builds high‑availability, cloud‑native services that power enterprise applications. The Senior Backend Developer designs and implements Java and Python microservices, optimizes AWS infrastructure, and ensures secure, scalable APIs.

Photon Group Backend Team builds scalable, high‑availability microservices for cloud‑native applications. The BackEnd Developer designs and implements Java/Spring Boot modules, integrates Vue.js front‑end components, writes unit tests, and manages AWS EKS and Lambda deployments.

Senior Backend Developer to design, develop, and deploy enterprise-scale services, architect secure DevSecOps pipelines, migrate and modernize AWS applications, integrate geospatial solutions, set technical standards, lead teams, mentor developers, evaluate performance, and support proposal writing for intelligence analysis products.

Jobs for Humanity seeks a seasoned Java Backend Developer to design, develop, and maintain high‑performance backend applications using Java 8 and Spring. The role focuses on building real‑time, event‑driven systems with Kafka, crafting RESTful microservices, and ensuring code quality through reviews and best practices.

Development team at Teal Media builds purposeful web experiences for mission-driven organizations. The Senior WordPress Backend Developer leads architecture and development of custom WordPress solutions, mentors the team, and partners with designers and strategists to deliver scalable backend systems.

Backend Developer on Turnblock.io's Blockchain Distribution Network team, building critical-path infrastructure for decentralized finance. Designs, implements, tests, and deploys new features in rapid cycles within an agile environment.

Bitovi Platform Engineering builds durable, distributed systems for enterprise clients using Java, Temporal, Kafka, and Kubernetes on AWS. The Backend Platform Developer Consultant designs and implements Java services, Temporal workflows, and event pipelines, while also owning Kubernetes-native infrastructure and CI/CD pipelines. This fully remote role (US‑based) includes occasional travel (3–5 days per quarter) and offers flexible hours.

ActioNet seeks a Mid-Level Java backend developer to design, build, and maintain high‑performance RESTful APIs for large public data discovery and analytics. The role involves full‑cycle development, cloud‑native ETL, database architecture, CI/CD, and Agile SAFe practices.

GitLab is the intelligent orchestration platform for DevSecOps, enabling organizations to ship better, more secure software faster. As a Staff Backend Engineer in the Developer Experience group, you will work cross-functionally across six globally distributed teams to identify and remove friction affecting internal engineering, split your time between hands-on coding in Ruby and Go, design scalable solutions, and shape engineering culture.

We are seeking a versatile Backend Developer to join our engineering team. The role involves designing, building, and maintaining server‑side logic and infrastructure that powers our applications.

ActioNet’s IgniteAction team seeks a Senior Developer to design and maintain advanced RESTful APIs for large-scale public data discovery and analytics applications. The role involves full lifecycle development, database optimization, and cloud-native ETL support using Java and AWS. This is a remote position based in the United States.

Blockchain Distribution Network (BDN) team at Turnblock.io builds a decentralized infrastructure enabling DeFi traders to execute better trades. The Backend Developer GoLang designs, implements, tests, and deploys new features in short cycles for critical-path services.

Senior Backend Developer to design, build, maintain backend services, APIs, platform capabilities. Lead architecture, design, CI/CD, production deployment, monitoring.

Legacy IHP Solutions is seeking a full-time Backend Software Developer to join a small, high-impact development team building a healthcare SaaS platform. The role focuses heavily on data integration and ETL work, building and maintaining pipelines that move data reliably between the system and external partners, with expected growth into broader backend feature development.

Bright Vision Technologies is a technology consulting and software development company delivering cloud, AI, data, and enterprise solutions across the United States. This is a fantastic opportunity to join an established and well-respected organization offering tremendous career growth potential.