Senior Full Stack Engineer

Job Description

Location: Helsinki, Finland - hybrid flexibilityCompensation: 90,000 - 120,000 + 0,5% equityStage: Funded early stage Founding engineering teamThe OpportunityAI agents are about to write most enterprise software. But who decides what they're allowed to build?Were building the solution - a system where AI builds the software itself - but within enterprise constraints: security, compliance, architecture, and auditability. Rethinking how software gets built in the AI era changes how enterprises develop software globally.Taiga is a policy-aware platform for autonomous software development. We take a conversation and turn it into a structured, compliant specification. Then AI agent swarms execute it into real software.This is when the magic happens:Policies become executableSpecs become machine-readableCode becomes traceable and auditableWe're a Finnish company with a working product and a CTO who built the first version solo. Now we're hiring the founding engineering team.You would be one of the first engineers defining how this actually works.This is your opportunity to create the magic.What You'll BuildYou'll work across the entire product surface - frontend, backend, database, and everything in between. On a small founding team, you go where the highest-impact work is.More importantly, you are helping to define how:AI agents interact with real codebasesEnterprise constraints become executable logicTeams collaborate with AI to build softwareIn your first months, youll work across the core system - from product experience to architecture - including things like:Designing how users interact with AI to define, refine, and govern software specificationsBuilding the policy engine that enforces enterprise rules on generated codeCreating collaboration workflows for reviewing, approving, and iterating with AIShaping the data architecture to support multi-tenant, auditable systemsDeveloping APIs and interfaces that AI agents use to read, write, and report backWorking directly with the CTO to shape architecture and make decisions that will define the systemSetting frontend and backend patterns for the codebaseEnsuring performance, accessibility (WCAG 2.1 AA), and enterprise-grade UXTech StackFrontend: React 19 TypeScript Vite shadcn/ui Tailwind CSSBackend: Node.js Fastify TypeScriptDatabase: PostgreSQL Drizzle ORM Row-Level SecurityInfra: AWS (ECS Fargate, RDS, S3, CloudFront) TerraformAI: Amazon Bedrock Claude Python agents (you'll integrate with these)Tooling: Monorepo (Turborepo + pnpm) GitHub Actions DockerWhat were looking forMust-havesYouve spent 5+ years building production web applications (TypeScript)Youre genuinely full-stack - you're comfortable owning a React component, a Fastify route, and a database migration in the same dayYou understand PostgreSQL beyond basics - schema design, performance, and data integrity matter to youYou take ownership end-to-end - from user interaction to deploymentYou have opinions about architecture and code quality - and can explain whyStrong advantagesExperience building multi-tenant SaaS with data isolationExperience with real-time interfaces (SSE, WebSocket, streaming)An eye for design you can make a data-rich interface feel clean and trustworthyExperience building editor-like or structured-form interfacesAWS experience (ECS, RDS, IAM)Interest in AI/LLM systems you'll work closely with AI agents even if you don't build them directlyYou've worked at an early-stage startup before and thrived in itMore than anything, we care about how you operate. You dont wait for perfect specs - you move forward, figure things out, and take initiative without needing to be told what to do. Youre comfortable working in ambiguity, adapting as things change, and you care about building the right thing.Reality checkThis is a founding team role with real impact - and trade-offs.Youll shape the architecture, culture, and technical direction of the company from the ground up, working closely with a CTO who built the system end-to-end. The product is genuinely novel - not another CRUD app or dashboard - and the codebase already exists (~70K LOC TypeScript), so youre not starting from zero.At the same time, this is a early-stage company. Things are ambiguous, priorities will evolve, and youll often operate across the stack and outside your comfort zone. Were building for enterprise customers, so the quality bar is high from day one - and there are no support layers yet.The team is based in Helsinki (Maria 01) and works mostly from the office, so ideally youd be open to spending most of your time onsite as well.Want to be part of defining how software gets built in the AI era?Wed love to hear from you!Applications to this role will be reviewed continuously, and the position will be filled as soon as the right candidate is found. To apply, please send your CV or LinkedIn profile (no cover letter needed!) latest 03.05.2026.You can get to know us better here: https://tai.ga/en/joinand read more about our recent work - including how we built a production-ready drone alert system in a weekend here.For more information about the position, please contact Maria Vuorinen (Senior Tech Talent Advisor at Finders Seekers) by email: maria@findersseekers.io or by phone at +358 50 407 6410 (available Mondays and Wednesdays between 15-16).