Senior Software Backend Engineer Jobs

Join Twenty in New York as a Senior Backend Software Engineer. Build scalable Go services and high-performance APIs for mission-critical national security cyber operations. 5+ years backend experience required.

Join Twenty in Arlington as a Senior Backend Software Engineer building scalable Go services and high-performance APIs for offensive cyber operations. 5+ years backend experience required. Competitive benefits included.

Senior Software Engineer, Web3 Backend in Menlo Park. Build scalable distributed systems bridging traditional finance with on-chain infrastructure. Requires 5+ years, Go/Python/Java, and deep system design expertise.

Join Anduril as a Senior Software Engineer, Backend in Santa Ana. Build full-stack web apps and UE5-based 3D visualization for maritime digital production. Requires 6+ years experience, JavaScript/TypeScript, React, Node.js, and real-time 3D engines.

Senior Backend Engineer role in Bengaluru (hybrid) building payment orchestration platform in Java/Spring Boot. Own core payment flows, routing logic and acquirer connectors on AWS. Requires distributed systems expertise, PostgreSQL and production ownership.

Join Anduril as a Senior Software Engineer, Backend in Santa Ana. Build full-stack web apps and UE5-based 3D visualization for maritime digital production. Requires 6+ years experience, JavaScript/TypeScript, React, Node.js, and real-time 3D engines.

Senior Backend Engineer role in NYC to build scalable distributed systems and LLM agent infrastructure. Requires 4-6+ years experience, Python/Go/Rust, AWS, and ML inference expertise. Above-market salary, equity, and flexible PTO.

Join Justworks as a Senior Software Engineer, Backend in Toronto. Lead large-scale projects, mentor engineers, and build scalable systems with Golang, SQL, and AWS. Enjoy great benefits and a supportive culture.

LangChain seeks a Senior Backend Engineer in NYC to build APIs and services powering LangSmith's AI observability platform. Requires 5+ years backend experience, Python or Go, and expertise in high-throughput systems.

DeepIntent seeks a Senior Staff Backend Engineer in Pune to lead Java/Spring architecture for high-throughput distributed systems. Requires 8+ years backend experience, deep Java 17+ expertise, and Kafka/Redis skills.

Join CHAOS Industries as a Senior Backend Software Engineer in San Francisco. Build secure Azure cloud infrastructure and real-time data services for defense technology. Requires U.S. Person status and security clearance eligibility.

Join RaceBets as a Senior Backend Engineer (PHP/Java) and build a global horse racing betting platform used by millions. Own features end-to-end with PHP 8+, REST APIs, and SQL in a high-traffic, real-money system.

Join Grafana Labs as a Senior Backend Software Engineer on the Loki team, working fully remote. Build and operate critical distributed systems with Python, C, C++, or Rust while shaping observability at scale.

Join Grafana Labs as a Senior Backend Software Engineer on the Loki team, working remotely from Canada. Design and operate critical Go-based distributed systems on Kubernetes while contributing to open-source projects and mentoring teammates.

Join Sardine as a Senior Software Engineer, Backend - KYC, and build robust backend services in Golang to fight financial crime. Remote-first role in Canada with equity, flexible PTO, and top benefits.

Snorkel AI seeks Senior/Staff Product Engineers with 7+ years of backend experience to build APIs, services, and data workflows for frontier AI products. Hybrid roles in San Francisco or NYC offer growth, leadership, and impact.

Deploy seeks a Senior Backend Engineer in Seattle to build scalable APIs, microservices, and distributed systems using Node.js and Postgres. Requires 5+ years experience, strong testing practices, and a passion for code quality.

Senior Backend Engineer role in Istanbul building scalable Node.js/TypeScript systems for AI-powered mobile apps used by millions. Requires 6+ years experience with PostgreSQL, MySQL, Redis, and distributed systems design.

Senior Software Engineer I in Bengaluru for backend and AI-enabled development. Requires 5+ years with Java, Spring Boot, Terraform, Salt, AWS, Kubernetes, and AI coding tools. Build scalable cloud-native systems.