Senior Software Engineer, Fullstack

Role Summary

We are hiring a Senior Software Engineer to help build the future of technical interviewing and assessment across CoderPad .

This is a fullstack role for someone who can move across backend services, frontend product surfaces, and AI-powered system design. You will work on user-facing features, production infrastructure, and internal engineering workflows where coding agents and AI-assisted development are part of normal day-to-day execution.

This role is remote from Latin America.

What You Will Work On

- Build and ship fullstack product features across candidate and recruiter experiences, from API and data model design to frontend implementation.

- Improve real-time AI-powered experiences used in interviews and assessments, including model orchestration, streaming UX, tool/function-calling patterns, and reliability.

- Contribute to systems that integrate multiple LLM providers and require pragmatic handling of latency, cost, observability, and non-deterministic behavior.

- Develop and improve deterministic internal tooling that helps engineers and agents execute work safely, repeatably, and with strong audibility.

- Partner across product, design, and platform teams to take ambiguous problems from definition to production rollout.

- Lead and mentor through code review, using reviews as both a quality gate and a coaching channel for less-experienced engineers.

- Plan and deliver technical debt, architecture, and observability initiatives that improve long-term system maintainability.

- Participate in on-call operations and drive runbook, reliability, and incident follow-up improvements.

Requirements

- Senior-level experience shipping production software end-to-end in a fullstack capacity.

- Strong backend engineering skills in at least one modern language and ecosystem, plus practical frontend experience with a component-based framework.

- Proven ability to pick up unfamiliar stacks quickly and deliver in mixed-technology environments.

- Hands-on experience with agentic development workflows (for example: Cursor, Claude Code, Codex, or equivalent), including good judgment on delegation, context scoping, and review of AI-generated code.

- Experience building production systems that use AI, such as LLM API integrations, prompt and context design, streaming responses, tool/function calling, and token or cost-aware engineering.

- Significant contribution to code review, with evidence of raising code quality and mentoring peers through the review process.

- Experience identifying and reducing technical debt, and contributing to architecture planning and documentation.

- Proven ownership of production system health through monitoring/alerting improvements, incident response, and operational follow-through.

- Experience partnering with product and technical leads on backlog preparation, scoping, sizing, and delivery planning.

- Strong engineering fundamentals in testing, observability, debugging, and safe incremental delivery.

- Clear written communication and collaborative ownership mindset in remote teams.

Desired Stack

You are not expected to know all of these technologies. Relevant equivalent experience is absolutely welcome.

- Backend surfaces include Ruby on Rails, Java services, and Node/TypeScript services.

- Frontend surfaces include React + TypeScript applications and shared web platform tooling.

- AI systems include integrations across Anthropic, OpenAI, Gemini, Llama, and Mistral families, with streaming and tool-calling capabilities.

- Platform and infrastructure include PostgreSQL, GraphQL, Redis/Sidekiq, Firebase Realtime Database, Datadog, LaunchDarkly, GitLab CI, cloud services (AWS and GCP), and containerized execution environments.

- Internal engineering workflows include Python-based deterministic CLI tooling and AI-agent skills that support repeatable development operations.

How We Work

- Remote-first collaboration across time zones with a strong written culture