Senior Full Stack Engineer

Senior Full Stack Engineer | AI SaaS | TypeScript, Node.js, React, GraphQL, AWS

Remote - Netherlands | Up to €120,000

A well-funded AI SaaS company is hiring a Senior Full Stack Engineer to help build a platform used by governance, risk and compliance teams to automate complex operational workflows.

The product sits across evidence collection, compliance workflows, customer integrations, permissions, audit trails, reporting, data validation and AI-assisted automation. It needs engineers who can think beyond feature tickets and understand how product decisions, backend design and production reliability connect.

The strongest fit is a backend-leaning full stack engineer who can own a feature from product problem through to technical design, implementation, failure handling and release.

You should be comfortable building in React, but the heavier technical bar is around TypeScript, Node.js, GraphQL, AWS, async workflows, third-party integrations and reliable SaaS architecture.

What you’ll be working on

You’ll be building product features where the complexity sits underneath the UI: data moving between systems, background jobs running reliably, customer workflows staying accurate, external APIs failing safely, and users needing clear visibility into what is happening.

The work will include:

Building full stack product features using TypeScript, Node.js, React, GraphQL and AWS

Designing backend services that support workflow automation, evidence collection and compliance operations

Working with queues, background jobs, retries, idempotency, dead-letter handling and async processing

Building integrations with customer systems and third-party APIs where reliability, error handling and observability matter

Designing for multi-tenant SaaS environments, including tenant boundaries, permissions, data integrity and workflow fairness

Creating React product experiences that reflect real backend state, including pending, failed, retrying and completed workflow states

Improving system visibility through structured logging, metrics, tracing, alerts and production diagnostics

Helping shape technical decisions around architecture, delivery speed, maintainability and operational risk

Using AI thoughtfully across product capability and engineering workflow

What the role needs

Strong candidates will have evidence of owning difficult engineering problems in production, not just contributing to isolated tickets.

You should bring:

Strong TypeScript and Node.js experience in commercial product environments

Solid React experience, ideally building real workflow-heavy product interfaces

GraphQL experience, including API design and data modelling considerations

AWS experience across services such as Lambda, SQS, SNS, DynamoDB, EventBridge, Step Functions, ECS or similar

Experience designing async workflows, queues, workers, retries, backoff strategies, idempotency and DLQs

Experience integrating with external APIs, customer platforms, SaaS tools or third-party data sources

Strong understanding of production failure modes: slow APIs, duplicate events, bad payloads, rate limits, partial failures and data inconsistency

Ability to explain system design decisions clearly, including trade-offs, constraints and why one approach was chosen over another

Product ownership mindset, with the ability to connect technical choices back to user impact and business workflow

Comfort working in a small, senior engineering team where ownership is high and ambiguity is normal

The level

This is a senior engineering role for someone who can explain work in terms of:

Problem, design, trade-offs, failure handling and outcome.

Examples of relevant experience could include:

Designing a queue or worker system where one customer cannot block everyone else

Building a payment, checkout, compliance, reporting or workflow system where accuracy matters

Integrating unreliable third-party APIs and protecting the product from their failure modes

Owning a GraphQL/API layer that simplifies complex underlying systems

Building React interfaces that accurately show async workflow state

Improving reliability, observability or data integrity in a production SaaS platform

Taking ownership of a feature area rather than only completing assigned tickets

Background in GRC, RegTech, security, compliance, fintech, payments, workflow automation or enterprise B2B SaaS would be useful. The core requirement is proven product engineering depth across full stack delivery and backend reliability.

Package

Up to €120,000

Remote in Holland, once per quarter meetups in Berlin

Senior engineering role in a well-funded AI SaaS business

Modern TypeScript, Node.js, React, GraphQL and AWS stack

High ownership across product, architecture and implementation

Complex workflow, integration and reliability problems

Small engineering team with strong technical influence

This suits someone who wants meaningful ownership of difficult product engineering problems and can operate as a hands-on senior engineer across frontend, backend, architecture and production reliability.

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