Full Stack Software Engineer | Python | C++ | APIs | Defence | ContractData Processing | Kubernetes | Sonar Systems | Hybrid (Southampton)SR2 is partnered with an industry leading consultancy on the Defence programme, supporting critical Defence innovation, and we''re looking for an experienced Full Stack Software Engineer to join the team.This role will focus on developing robust, production-grade APIs, building data pipelines, and delivering software applications into secure containerised environments. You''ll work closely with scientists, engineers, and domain experts to ensure sonar data is processed, shared, and operationally ready.Key Responsibilities:Design and develop APIs for data streaming across multiple protocols (HTTP RPC, WebSockets, TCP, UDP) using JSON/ProtobufSupport engineers and scientists in adopting and using APIs effectivelyBuild and maintain data processing pipelines in collaboration with domain expertsReview and contribute to codebases across Python and C++Create and maintain unit and integration tests for reliability and qualityDeliver applications into container orchestration systems like KubernetesDocument design decisions and ensure knowledge sharing across teamsSolve complex technical challenges across multi-technology environmentsSkills andamp; Experience Required:Strong background in software engineering and data management principlesProven expertise with Python and a strongly-typed language (C/C++)Extensive experience designing and deploying pr