Top Senior Software Engineer Jobs

As a Software Engineer, you will build backend infrastructure for Mashgin’s self-checkout kiosks, focusing on scalable cloud solutions and code optimization.

Design, develop, test, and maintain scalable software applications, APIs, services, and platform capabilities. Lead technical architecture and implementation, improve system performance and reliability, support automated delivery and testing, and establish engineering standards. Partner with cross-functional teams, communicate technical decisions, mentor engineers, and evaluate emerging technologies, including AI-enabled development tools. The role is fully remote with occasional travel of up to 15%.

Develop and maintain Java and Spring Boot backend services for an omnichannel payment platform and POS system. Integrate POS terminals with payment platforms, API gateways, and downstream services; troubleshoot payment and production issues; perform onsite testing with POS hardware; and build secure, scalable, highly available services. The role includes automated testing, code reviews, architecture discussions, cross-functional collaboration, and support for event-driven systems in PCI-scoped environments.

Designs, develops, tests, supports, and modernizes IBM iSeries business applications using RPG, SQL, and CL. Maintains DB2 databases, ERP, WMS, finance, distribution, and supply chain systems; develops APIs, web services, EDI, and automated integrations; troubleshoots production and performance issues; collaborates with business stakeholders; supports Agile and Waterfall initiatives; participates in code reviews, monitoring, documentation, and mentoring.

Develop and support enterprise applications using C#, .NET, and Azure. Build scalable APIs, microservices, event-driven solutions, cloud architectures, and data pipelines. Apply AI-assisted development and agentic workflows, conduct code reviews, manage source code, analyze requirements, and collaborate with technical and business stakeholders while following SDLC, risk, regulatory, and control standards.

Build and deploy scalable, maintainable full-stack applications, with a primary focus on backend development in Ruby and Ruby on Rails. Design APIs, data models, and performance optimizations while applying security best practices. Contribute to React and TypeScript frontend work, infrastructure, vulnerability fixes, and CI/CD improvements as needed. Collaborate cross-functionally to deliver reliable, high-quality product experiences.

Develop and maintain Python microservices using Kafka and Elasticsearch, deploy and monitor services in Kubernetes, and build CI/CD pipelines. Responsibilities include testing, troubleshooting production systems, participating in architecture and code reviews, applying security and observability practices, documenting solutions, and collaborating with cross-functional teams supporting a DIA technology platform.

Design, architect, develop, test, and support scalable full-stack applications for a high-volume, multi-tenant data platform. Own features from design through delivery, contribute to technical strategy and roadmap development, ensure operational excellence, collaborate across distributed teams, and mentor engineers. Apply cloud-native technologies and AI-assisted development practices while supporting near-real-time analytics and reliable production operations.

Design, develop, and support scalable regulatory technology systems using Python, Java, cloud services, APIs, microservices, and automated delivery practices. Provide architecture guidance, production support, incident resolution, system optimization, and technical leadership. Collaborate with business, operations, compliance, and IT stakeholders; mentor developers; support infrastructure and disaster recovery initiatives; and evaluate AI-assisted engineering tools in a highly regulated environment.

Build and operate full-stack software, infrastructure, and internal engineering tools supporting reactor design, fuel manufacturing, licensing, and plant operations. Integrate PLM, ERP, MES, and records systems; develop web interfaces; maintain traceability and data quality; and own deployment, observability, CI/CD, and on-call operations. Diagnose issues across the technology stack, use AI coding tools responsibly, lead technical direction and reviews, and mentor engineers. The role requires collaboration across engineering, manufacturing, supply chain, quality, and operations.

Architect and build highly available control-plane network services for TeraWave’s satellite communications network. Design microservices for subscriber provisioning and session management, develop stateful distributed systems across terrestrial data centers and orbital nodes, and optimize SQL, NoSQL, and time-series databases handling billions of telemetry points. The role also involves cloud-native Kubernetes deployments, service mesh, resiliency patterns, event-driven architecture, and large-scale observability.

Lead architecture and delivery across Rails backends and React frontends, build Node.js and NestJS platform integrations, establish testing and code-quality standards, mentor engineers, review code, and improve reliability, performance, and developer experience. The role requires technical ownership across multiple backend technologies and leadership in AI-assisted development practices.

Build and scale Opencall’s realtime voice platform, customer dashboard, agent runtime, and analytics pipeline. Design high-performance systems capable of supporting over 100 times current traffic, develop impactful product features, and contribute to architecture decisions. The role begins as an individual contributor and may grow into organizational leadership involving hiring, delegation, and mentorship. Strong product judgment, communication, and software engineering fundamentals are essential.

Build and scale the company's data infrastructure: design ingestion paths, event models, schema-flexible data models, change capture, query performance, freshness guarantees, and analytics serving for customer-facing dashboards and evaluation pipelines.

Founding technical lead for Aptos Payments: define and ship the Payment API, run partner integrations with banks/PSPs/stablecoin issuers, build trust infrastructure (reconciliation, KYC/KYB, testnet sandbox), integrate payments with trading RFQ systems, and hire and lead the initial engineering team while making build-vs-buy decisions tied to business gates.

Design, build, and maintain full-stack features and high-performance backend infrastructure. Architect scalable APIs and data flows, integrate frontend and backend systems, collaborate with product, design, and research to ship user-facing products, and ensure reliability, observability, and iterative experimentation across the platform.

Develop, maintain, and enhance enterprise software systems and SPLUNK integrations. Analyze data sources, design and implement back-end and front-end components, build RESTful services, deploy to Tomcat, lead small teams, execute testing, and collaborate with systems and hardware engineers to meet performance and security requirements.

Build and own Cogent's full‑stack AI security product experience: design, implement, and maintain backend microservices, APIs and databases; develop frontend interfaces (customer portal, knowledge engine, labeling tool, dashboards); integrate systems; ship features in a multi‑tenant/cloud environment; mentor hires and contribute to engineering, operational excellence, and hiring processes.

Lead frontend architecture and platform work, build reusable component libraries and tooling, deliver AI-driven user features for security workflows, mentor engineers, and ensure scalable, high-quality frontend infrastructure and UX.

Leads the design, development, testing, deployment, and operation of scalable sportsbook software. Owns complex technical execution, architectural decisions, incident resolution, code quality, observability, and process improvements. Collaborates with product, design, and engineering stakeholders, mentors developers, and helps shape team strategy and technical direction for distributed sportsbook systems.

Develop, maintain, and scale company websites and web applications. Design system infrastructure, manage servers, ensure security and performance, integrate back-end data sources, implement responsive HTML5/CSS3/JavaScript interfaces, write testable efficient code, document systems, and collaborate with designers and vendors to deploy enhancements and recovery policies.

Own storage, protection, and operations for relational, streaming, and analytical stores. Standardize backup, restore, retention, and encryption across Aurora/RDS, ClickHouse, and MSK. Build observability dashboards for capacity, performance, replication, lag, and cost. Create a Storage Operations Agent for incident triage, slow-query investigation, and remediation workflows. Hands-on engineering role focused on data infrastructure, automation, and agent-forward operations.

Work across Pinto's web stack to design, build, and maintain features and tools for a product data and analytics platform. Implement interfaces, data integrations, and pipeline automation using React, Node.js, GraphQL, and MongoDB. Collaborate with research and data teams and iterate on systems processing large, complex food product datasets.

Design, build, and improve Pinto's backend data platform using Node.js/TypeScript. Collaborate with research and data teams to implement data pipelines, integrations, and features that process large, complex product and nutrition datasets. Lead initiatives end-to-end, ensure system performance and reliability, and iterate on production services.

Own product features end-to-end: build integrations to customer systems (PACS/RIS/EHR) using DICOM/HL7 and site-to-site VPNs, onboard clients, develop internal apps for case assignment, peer review, and analytics, identify process and automation opportunities, and independently manage medium-to-large projects.