Senior FullStack developer (long term, contract)

selecto; Barcelona; A distancia; EUR 75.000 - 110.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Remote work in Europe

Occasional on-site visits

Descripción de la vacante

selecto is seeking a Senior FullStack Developer ready to transition toward a Team Lead role for an ambitious, complex project in the identity and rewards space. The platform manages users, roles, permissions, KYC/KYB, and ties into CRM, accounting, and card-issuing tools.

This fully remote role is Europe-wide, with preference for Western Europe and occasional on-site visits. Expect 6–12+ months engagement and a strong emphasis on security and architecture.

Formación

• Experience designing schema-driven systems in fintech/identity domains.
• Strong knowledge of PostgreSQL and JSONB modeling.
• Experience with access control and security reviews.
• Experience integrating external APIs with graceful error handling.

Responsabilidades

• Own architectural decisions for a large evolving codebase in a sensitive domain (KYC/KYB, rewards, card issuance).
• Extend the generic-entity/schema system without regressions.
• Lead integration work with external providers (SmartSearch, Salesforce, Xero, Pannovate, SendGrid).
• Review code with a security-first eye, focusing on permissions/access-control gaps.
• Maintain memory bank and feature-level documentation practices.
• Participate in on-call/production support.
• Manage the DevOps part of the project.
• As the role matures, mentor engineers and set guardrails for non-engineering contributors via AI tools.

Conocimientos

Leadership potential

English proficiency (B2+)

Security/code reviews

API integration experience

Architectural decision making

DevOps familiarity

Remote collaboration

Herramientas

Next.js 15, TS, tRPC

PostgreSQL & JSONB modeling

pgvector, Drizzle ORM, Zod

NextAuth.js & Keycloak (OIDC/OAuth2)

Tailwind & shadcn/ui

Docker & Azure Container Apps

Terragrunt & GitHub Actions

CI/CD tooling

Descripción del empleo

We are looking for a skilled Senior FullStack Developer who is ready to take on a Team Lead position soon and join an exciting and complex project.

Description: An AI-powered platform for managing users, roles, and permissions. It handles identity verification (KYC/KYB), a rewards/points system, and connects with CRM, accounting, and card-issuing tools. It's genuinely complex - not just a simple database app.

English Proficiency: Upper-Intermediate / B2+ (client-facing communication required)

Team: Project Manager, Product Designer, 2 FullStack developers, Support Engineer.

Expected Working Hours: Full-time, 40 hours/week.

Location: Remote, Europe only. Preference for Western Europe (occasional on-site visits may be required); candidates from Eastern Europe will also be considered.

Engagement Duration: 6-12+ months (long-term).

Technology Stack:

• Next.js 15 (App Router) + TypeScript, tRPC

• PostgreSQL + pgvector via Drizzle ORM, Zod

• NextAuth.js + Keycloak (OIDC/OAuth2)

• Tailwind + shadcn/ui

• Docker, Azure Container Apps, Terragrunt + GitHub Actions

Skills:

• Schema/metadata-driven system design (this project uses per-role schema overlays across 11 distinct roles, not off-the-shelf RBAC).

• JSONB-based PostgreSQL modeling.

• Strong code review instincts around authorization/access control.

• Integrating multiple third-party APIs with graceful handling of partial failures.

• DevOps-adjacent comfort (Docker, IaC, CI/CD, Azure).

Responsibilities:

• Own architectural decisions for a large, actively evolving codebase in a compliance- and finance-sensitive domain (KYC/KYB, points/rewards economy, card issuance).

• Extend the generic-entity/schema system without regressions.

• Lead integration work with external providers (SmartSearch, Salesforce, Xero, Pannovate, SendGrid).

• Review code with a security-first eye, particularly on permission/access-control gaps.

• Maintain the project's Memory Bank and feature-level documentation practices.

• Participate in on-call/production support.

• Responsible for managing the DevOps part of the project

• As the role matures, mentor other engineers and set technical guardrails for non-engineering contributors working directly in the codebase via AI tools.