Sr Software Engineer (Costa Rica - Remote)

Braintrust; United States; À distance; USD 62 000 - 76 000; Plein temps

Résumé du poste

Braintrust is seeking a Sr Software Engineer (remote from Costa Rica) to own domain APIs and SDK contracts. You will migrate legacy services into NestJS, maintain data integrity, and drive RFCs and migration plans, while collaborating across teams on authentication, authorization, and data governance.

You’ll work with TypeScript/Node.js at production depth, leverage AWS serverless tooling, and design robust REST/GraphQL services with PostgreSQL backing.

Qualifications

• Must have TypeScript and Node.js at production depth.
• PostgreSQL in depth: schema design, migrations, indexing, EXPLAIN ANALYZE.
• AWS serverless and event-driven design: Lambda, SQS with FIFO queues and dead-letter queues, SNS, Parameter Store.
• API design: REST/OpenAPI with generated typed SDKs, plus GraphQL for older services.
• Authentication/authorization: RBAC, Okta, central IAM, token-based partner access (DPoP).
• Testing discipline: Jest with Testcontainers-backed integration tests.

Responsabilités

• Owning the user, role and organization domains; building and evolving APIs and SDK contracts.
• Migrating off legacy services; moving logic from serverless/GraphQL to NestJS domain services.
• Protecting data integrity; lifecycle automation driven by SAP data; backfills and large account migrations.
• Code review across 35–65% of PRs; ensuring quality and consistency.
• Cross-team design work; RFCs and migration plans; lead on auth and data integrity questions.

Connaissances

TypeScript

Node.js

NestJS

API design

OAuth/Okta authentication

Data modeling

Testing (Jest)

Event-driven AWS (Lambda, SQS, SNS)

SQL/PostgreSQL

GraphQL

RFCs/migration planning

Code review

Outils

PostgreSQL (TypeORM)

AWS Serverless

SQS (FIFO, DLQ)

OpenAPI/REST SDKs

GraphQL

Description du poste

• Rate: $45 – $55/hr
• Hours: 40 hours / week
• Experience: 5 - 10 years
• Location: United States | Canada + 9 more

Job title: Sr Software Engineer

Team: Customer Domain Engineering

Pay Rate: $45-55 USD/hr

Location: Costa Rica (remote)

What the team does and why it matters

The team owns the source of truth for provider organizations, locations, users and permissions. This is the business-to-business side of Allē, the loyalty platform used by tens of thousands of aesthetics practices. It isn't payments or loyalty itself, but those depend on it: checkout and payments, pricing and loyalty programs, feature enablement and partner integrations all rely on this platform to know who a practice is, what it can access, and who can act for it. Bad data or downtime here spreads straight into revenue-facing flows. That's why the team also carries the high-stakes work, such as moving accounts onto AbbVie's SAP after the acquisition.

Technical Skills Required:

Must have

• TypeScript and Node.js at production depth. NestJS for the domain services.
• PostgreSQL in depth: schema design, migrations, indexing, and reading query plans (EXPLAIN ANALYZE). The ORM is TypeORM.
• AWS serverless and event-driven design: Lambda, SQS (including FIFO queues and dead-letter queues), SNS, Parameter Store.
• API design: REST/OpenAPI with generated typed SDKs for consumers, plus GraphQL for the older services.
• Authentication and authorization: role-based access, Okta, service-to-service auth through central IAM, and token-based partner access (DPoP).
• Testing discipline: Jest with Testcontainers-backed integration tests.

Strong plus

• Temporal, or another durable-workflow engine.
• Terraform. Enough Kubernetes to deploy and debug: Kustomize overlays, IAM roles for service accounts (IRSA).
• Datadog for observability. GitHub Actions and ArgoCD for CI/CD.

What the role involves day to day

• Owning the user, role and organization domains. Building and evolving the APIs and SDK contracts that other teams consume.
• Moving off the legacy services. Moving logic from the older serverless/GraphQL services into the NestJS domain services without breaking anyone who depends on them.
• Protecting data integrity. Lifecycle automation driven by SAP data (archival, transfers), backfills, reconciliations and large account migrations.
• Reviewing code. This role has been reviewing roughly 35–65% of the team's PRs, so reviewing is a core part of the job.
• Cross-team design work. The go-to person for consumer SDKs, user APIs, data integrity and auth questions. Writes RFCs and migration plans.
• Keeping the platform healthy. Runtime upgrades, CI hardening, test infrastructure, performance tuning.

Soft skills and experience to screen for

• Care with data. Treats a migration or backfill as a production change: a written plan, dry runs, reconciliation, a rollback path.
• Clear writing. Can produce an RFC or migration plan that other teams act on.
• Experience moving off legacy systems. Has replaced a legacy system step by step, using feature flags, fallbacks or parallel runs, and can explain the trade-offs.
• Consumer empathy. Thinks about API stability, versioning and how changes affect downstream teams.
• Mentoring and reviewing. Can raise the level of the team through reviews, not only through their own output.
• Follow-through. Gets work merged, or deliberately closes it, rather than leaving it unfinished.

Company: Sr Software Engineer (Costa Rica - Remote)
Rate: $45 – 55/hr
Location: Engineering
New
Costa Rica