Freelance Software Engineer

Who we are Bitrock is a high-end consulting and system integration company, strongly committed to offering cutting-edge and innovative solutions. Our tailored consulting services enable our clients to preserve the value of legacy investments while migrating to more efficient systems and infrastructure. We take a holistic approach to technology: we consider each system in its totality, as a set of interconnected elements that work together to meet business needs. We thrive on overcoming challenges to help our clients reach their goals, by supporting them in the following areas: Data, AI & ML Engineering; Back-end Engineering, Platform Engineering, Front-end Engineering, Product Design & UX Engineering, Mobile App Development, Quality Assurance, FinOps, GovernanceThe effectiveness our solutions also stems from partnerships with key technology vendors, like HashiCorp, Confluent, Lightbend, Databricks, and Meterian. Who we are looking for We're looking for a Software Engineer Freelance to take full ownership of backend services within a startup-style, high-autonomy team. You will be responsible for analyzing, taking over, and progressively rewriting components of an existing AWS platform today managed by an overseas vendor. The team will make intensive use of Claude Code (license covered by the client) and dedicated AI agents (PM, Analyst, Dev, Tester, DevOps) to amplify impact and speed up development. What You'll Do Analysis and takeover of existing backend services on AWS without complete access to source codeProgressive rewriting and development of missing or legacy backend componentsDesign and implementation of RESTful APIs, microservices architecture, and database integrationsReverse engineering and reconstructing system behavior starting from logs, configurations, and real service interactionsTechnical liaison with the current overseas vendor during the handoff phaseActive usage of AI-assisted tools (Claude Code, AI agents) to streamline coding, debugging, and testing workflows Requirements Mid-to-senior seniority: you'll act as a primary technical reference point toward the overseas vendorSolid, hands-on experience with Java and Spring / Spring Boot ecosystemStrong foundation in service-oriented architectures, REST APIs, and database managementProven ability to work on poorly documented systems or legacy codebases (reverse engineering experience is a strong plus)Autonomy, pragmatism, ownership: a startup mindset, no need for close supervisionExperience with, or strong interest in, AI-assisted development (Claude Code, AI agents)English B1/B2 Duration: 1 year (possible extension) Start: ASAP Recruitment process Our recruitment process has 3 stages: First discovery short interview with our HR teamTechnical interview with our Team LeadersFinal interview with our Client How to apply: You can apply via LinkedIn or send your cv to hr@fortitudegroup.it