{"id":91793,"url":"https://alion.io/job/viktor-agent-harness-engineer-on-site","title":"Agent Harness Engineer","company":{"id":7156,"name":"Viktor","domain":"viktor.com","url":"https://alion.io/company/getviktor-com","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"A","score":91,"open_postings":28,"ghost_share":0.143,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":54,"computed_at":"2026-11-02T06:13:15Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":null,"employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Warsaw, Poland","Germany"],"countries":["PL","DE"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"Context Engineering","optional":false},{"name":"Model Context Protocol","optional":false},{"name":"Python","optional":false},{"name":"Slack","optional":false}],"status":"live","first_seen_at":"2026-04-29T13:46:06Z","employer_posted_date":"2026-04-29","last_verified_at":"2026-11-02T05:05:03Z","board_verified":true,"closed_at":null,"days_open":186,"trust":{"level":"ghost","repost_count":0,"flags":["stale","company_stale"],"days_open":186},"description":"The Short Version\nYou're the person who makes Viktor do more things, for more customers, more reliably. You've built agents before (runtime, tools, memory, evals) and have opinions about what makes them work. You ship the day you write the code and reach for agentic engineering by default. If you've never built an agent, this isn't the role.\nThe Hard Part\nWe're building a harness ready for AGI. Models keep getting better on their own; the harness decides how much of that intelligence turns into real work. Viktor shouldn't wait to be handed tasks. It should explore what a company is doing and automate it on its own.\nGetting there is context engineering at the frontier: how the system prompt, skills, memory, and tools interact on diverse, complex problems, and how that interplay holds up across the real work of tens of thousands of workspaces.\nWhat You'll Actually Do\nBuild the agent runtime: the loop where it plans, acts, and verifies its own work instead of declaring success it didn't earn.\n\nEngineer the context: shape how the system prompt, skills, memory, and tools combine, and how the agent holds up when problems get diverse and complex.\n\nMake the agent fluent with tools: composition across many integrations, recall, and the skill files that keep the right functions at hand.\n\nGrow what the agent can do: memory it can trust, skills it writes for itself, work it runs on its own.\n\nMake it measurably better: evals, catching regressions, and turning every failure into a fix.\n\nShip product: features that reach users through Slack and Teams within hours.\n\nWhatever needs building. Small team, large surface.\n\nWho You Are\nYou've personally built or significantly modified an AI agent harness, and can describe the trade-offs you made.\n\nYou understand how an agent's system prompt, skills, and tools interact on diverse and complex problems, and you've tuned that interplay yourself, not just read about it.\n\nYou've built custom skills, commands, CLIs, or MCP servers to make your own agentic coding faster.\n\nAgentic coding is your daily workflow, and you've stress-tested models and harnesses across the frontier.\n\nSystems thinking. You make hard technical trade-offs and design for how things break at scale.\n\nSpeed, with the bar up. You ship today, not Thursday.\n\nGenuine interest in how AI works. You've read the papers and have opinions about evals.\n\nMunich or Warsaw, or remote in Europe.\n\nWhy This Role Is Different\nNo layers. You work directly with both founders, and decisions get made in the room, not in a Linear ticket.\n\nThe agent is the product. Every reliability win shows up in retention the next week.\n\nFrontier work. You're building a harness at the edge of what's currently possible, experimenting with agents that can take on full responsibilities, not just tasks.\n\nEven Better If\nPrevious AI engineering experience: agents, harnesses, eval infrastructure.\n\nPrevious founder or early-stage builder.\n\nOpen source contributions to the AI tooling we live in.\n\nTech\nPython. No agent framework, no orchestration library. We build the harness ourselves, from the loop up.\nHow we work\nSmall team, high trust, low process. Decisions are made by owners, not committees. You will ship your first week. You will talk to users your first day.\nWe don't do alignment meetings or stakeholder syncs. We build things, see if they work, and iterate.\nWhy Viktor\nSingular focus: we're building a harness that can hold an AGI-level model and make it useful for everyone.\nWe're one of the fastest-growing companies in the world. The product works. The market is pulling.\nThis is a rare window: everyone here owns something real. Not a task. A surface of the company that customers depend on. That doesn't last forever. Right now, it's still true.\nCompensation\nTop-of-the-market salary and the kind of ownership that only exists at this stage.\nThe best work happens when you're in the room. 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