Principal Software Engineer
Interact Software
full-time
Posted on:
Location Type: Remote
Location: Poland
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About the role
- Design, build, and ship high-quality, production-grade software using C#, ASP.NET, ReactJS, Node.js, SQL Server, and AWS services.
- Serve as a hands-on architect—leading design discussions, writing foundational code, and validating technical approaches through prototypes and spikes.
- Maintain deep familiarity with our codebase and actively contribute to critical, high-impact features and refactoring initiatives.
- Define and uphold engineering standards across squads, including SOLID, design patterns, secure coding, and observability principles.
- Evaluate technical trade-offs, performance implications, and long-term maintainability to steer architectural direction.
- Lead and implement AI-powered features across Interact’s ecosystem, including intelligent search, summarisation, classification, recommendation systems, and generative capabilities.
- Develop secure and scalable AI integration layers using modern patterns (embeddings, RAG, vector databases, prompt orchestration, evaluation frameworks).
- Build and maintain AI-related services, APIs, and backend components—including telemetry, evaluation pipelines, and guardrails.
- Establish best practices for responsible AI, including privacy, compliance, red-teaming, fallback logic, and model governance.
- Partner with Product to prioritise AI initiatives and define measurable success metrics for user experience and business impact.
- Create reusable AI components, SDKs, documentation, and guidelines for wider engineering use.
- Lead cross-team initiatives, unblock complex technical challenges, and ensure architectural alignment across the organisation.
- Work closely with Product & Delivery Managers to refine requirements, shape roadmaps, and ensure predictable delivery.
- Break down complex problems and guide teams through execution—participating directly in coding when needed.
- Champion testing excellence: author and maintain unit tests, integration tests, and Playwright E2E tests.
- Work closely with DevOps to optimise CI/CD pipelines (TeamCity, Octopus Deploy) and improve deployment reliability.
- Conduct in-depth code reviews, provide hands-on pairing, and ensure code quality across multiple squads.
- Optimise performance across APIs, databases, caching, distributed systems, and front-end rendering.
- Maintain hands-on involvement in resolving complex production issues, running post-mortems, and designing long-term solutions.
- Develop secure-by-default features and collaborate with Security to ensure AI and platform components meet compliance requirements.
- Contribute to scalable AWS infrastructure design and cost-efficient resource usage.
- Mentor engineers of all levels—especially Senior and Staff engineers—to elevate technical thinking and delivery quality.
- Facilitate design clinics, architecture reviews, and knowledge-sharing sessions, including AI education and literacy.
- Contribute to hiring pipelines through technical interviews and role calibrations.
- Stay ahead of industry trends in AI, cloud, web engineering, and developer tooling.
- Initiate and lead innovation spikes, proofs-of-concept, technical evaluations, and platform enhancements.
- Promote continuous improvement and foster a culture of curiosity and craftsmanship.
Requirements
- 10+ years of professional engineering experience, including designing and delivering large-scale, distributed systems.
- Proven track record of hands-on development across back-end (C#, ASP.NET) and front-end (ReactJS) environments.
- Extensive experience integrating AI/LLM technologies into production environments.
- Strong competence with SQL Server, T-SQL, performance tuning, caching (Redis), ElasticSearch/OpenSearch, and distributed systems patterns.
- Experience operating in Agile/Scrum and collaborating closely with Product, Delivery, QA, and DevOps.
- Strong Git and CI/CD experience (Bitbucket, TeamCity, Octopus Deploy).
- Real-world experience designing secure, scalable, resilient systems on AWS.
- Expert understanding of OOP, SOLID principles, design patterns, data structures, and algorithms.
- Deep knowledge of asynchronous processing, concurrency, distributed architectures, and high-volume transactional systems.
- Working knowledge of Docker, containerised workloads, and cloud-native best practices.
- Understanding of modern AI integration patterns: embeddings, vectors, RAG, prompt engineering, evaluation techniques, model safety.
- Strong familiarity with Atlassian tools (Jira, Confluence).
- Hands-on technical leader with a bias for action and ownership.
- Excellent communicator who can simplify complex systems for technical and non-technical audiences.
- Pragmatic, user-centric problem solver with strong attention to detail.
- Curious, innovative, and proactive in driving the organisation forward.
- Collaborative, empathetic team player who uplifts others.
- Strategic thinker who can balance immediate delivery with long-term architecture needs.
Benefits
- 25 days annual leave
Applicant Tracking System Keywords
Tip: use these terms in your resume and cover letter to boost ATS matches.
Hard skills
C#ASP.NETReactJSNode.jsSQL ServerT-SQLAI integrationperformance tuningOOPdesign patterns
Soft skills
excellent communicatorpragmatic problem solvercollaborative team playerstrategic thinkercuriousinnovativeproactivementoringleadershipattention to detail