Senior Full Stack Typescript Engineer (AI)

Kindgeek is looking for a full-stack engineer who takes an ambiguous business problem and carries it all the way to production without waiting for a complete specification. Your mission will be to build features for an AI-native fintech product where deterministic logic owns every number and AI and ML components suggest extract and flag but never decide. Youll work on one product deeply as part of a small senior team with real ownership from day one.

As a Senior Full Stack Typescript Engineer (AI) you will be responsible for:

• Owning features end to end from an ambiguous business problem through data model API workflow and UI;
• Building typed backend services in and TypeScript with relational data modeled in PostgreSQL;
• Designing asynchronous event-driven workflows that handle retries partial failure and unreliable third-party services;
• Building or consuming AI-powered features such as structured extraction tool use or drafting always with validation and clear boundaries against deterministic logic;
• Integrating machine learning predictions into product surfaces handling confidence timeouts and degraded responses without fabricating a value;
• Building interfaces people work in all day such as review queues forms and multi-step flows in React and ;
• Writing meaningful tests and working with observability tools so behavior in production is something the team can verify not assume.

Were looking for a Senior Full Stack Typescript Engineer (AI) who has:

• 5 years of production experience with and TypeScript across the stack;
• Solid experience with PostgreSQL or another relational database including schema design and migrations;
• Experience with typed API contracts such as tRPC GraphQL or an equivalent with runtime validation at the boundary;
• Experience with asynchronous or event-driven backend work such as job queues or workflow engines;
• Production experience with React including a modern framework such as ;
• Practical experience with at least one shipped LLM-powered feature and a concrete failure mode you contained;
• Comfort consuming ML predictions in application code with a real understanding of confidence and uncertainty;
• Experience writing meaningful tests and debugging issues in production;
• Comfort taking an ambiguous problem and making a decision under incomplete information;
• Strong spoken English and direct low-ego communication with a US-based client team.

Will be a plus:

• Experience with agentic frameworks RAG systems or LLM evaluation and tracing tools;
• Experience with document processing such as OCR PDF parsing or structured extraction;
• Experience with AWS infrastructure CI/CD SSO or SAML or prior work in a regulated or high-trust domain.

We want you to thrive and feel supported

• Professional growth: at Kindgeek we want our employees to grow and achieve ambitious professional goals. We support professional development with training and certification refunds and provide regular feedback and technical reviews.
• Benefits package: Kindgeek offers all team members competitive compensation and a benefits package that includes 18 working days of fully paid vacation 10 compensated by 50% sick leaves without a note from the doctor and an opportunity to take study leaves. Depending on how long you stay in the company you can receive different health insurance packages from our partners.
• Personal growth: as a part of our team you will have access to corporate English courses with a 50% reimbursement take advantage of our offline library and access a large selection of corporate training and classes. Also every employee can request any internal or external training or certification if it applies to his or her work responsibilities.
• Geek community: at Kindgeek we value community even in the full-scale invasion times we take every opportunity to stick together. Our geeks organise various online and offline clubs from stretching and skiing to English. We volunteer together and support each other.
• Flexibility: Kindgeek offers a hybrid working model. Team members can work remotely or from the office or Kindgeek London Hub an innovative cafe-style co-working in Lviv (its pet-friendly!).

At Kindgeek we encourage everyone to apply regardless of nationality race gender marital status disability sexual identity or religion. We are growing into an inclusive equal-opportunity company where only professionalism competence and ideas matter. We are committed to supporting mobilised employees and veterans joining Kindgeek and facilitating their career development. We aim to bring equal opportunities to all team members and candidates especially those underrepresented in technological companies.