Accepting Q3 projects
[email protected]
Capabilities — print-ready overview. In the print dialog: set Margins → Default, uncheck Headers and footers, check Background graphics.
Capabilities Overview

Software,
built like
it has to last.

A senior-led software engineering studio. Custom development, cloud platforms, and consulting for teams who measure success in years, not sprints.

Issued 26 May 2026
Web spainlink.es
01

Who we are

Spainlink is a software engineering studio. We design, build, and operate custom software for teams that need to ship something serious — and need it to keep working long after the launch announcement.

The model is deliberately small. A handful of senior engineers, no offshore handoffs, no growth-at-all-costs pressure to take on work we shouldn't. Every project is run by the people who'll write the code, including the discovery conversations and the late-night incident calls.

We work with teams worldwide, mostly with those that have outgrown a side-of-desk arrangement and want a partner who treats their codebase the way a senior in-house engineer would. That framing — partner, not vendor — is the part that matters.

What we believe

Principle What it means in practice
Build for the next engineer We write code with the assumption that someone else — maybe us in two years, maybe your in-house team — will read it next. That changes a lot about how we make trade-offs.
Boring technology wins Postgres before the new graph database. Spring Boot before the framework that trended last quarter. We use boring tech because boring tech is what survives.
Honest before clever We'd rather tell you the unflattering version of the trade-off than the clever-sounding one. Long term, that's what clients actually want from their engineers.
Small bets, well executed We take a small number of engagements at a time. It means saying no to interesting work — but the alternative is doing all of it less well.
Show your work Architecture decisions, trade-offs, what we tried and rejected — all written down. So your team can read the reasoning later and make their own calls when context changes.
Stay around Software has a long tail. We maintain what we build and we're still around two years later when something breaks. The studio model only works if you mean it.
02

How we work

Predictable cycles, working software, no theatrics. You see progress weekly — not a big reveal six months in.

# Stage What happens
01 Listen first Before any code, we make sure we understand the business problem, the constraints, and the people who'll live with what we build.
02 Design with intent Architecture, data, and interface decisions made deliberately — not because a framework's docs suggested them. The right boring technology for the job.
03 Build and ship Short cycles, working software, predictable invoices. Continuous deployment from day one.
04 Stay around Software has a long tail. We maintain what we build, and we're still here when something breaks two years later.
03

Custom software development

From the messy 0→1 prototype to the platform that quietly runs your business for a decade.

Tags
  • Web apps
  • APIs
  • Mobile
  • Internal tools

What we build

The work we like is the work that has to keep working. New products that need to ship and then survive their second year. Internal tools that replace a brittle spreadsheet a department has quietly built its month-end process around. Backends that need to handle the load of a feature your competitors are about to launch.

We’re the team you bring in when the answer to “should we build this ourselves?” is “yes, and we want it built properly.”

How we typically engage

  • 0→1 builds. Greenfield products where we own design, architecture, and shipping. You bring the business problem; we bring the engineering.
  • Rescue projects. A codebase from a previous team or agency that needs to be stabilized, documented, and made shippable again. We start with a short audit, propose a remediation plan, then execute.
  • Long-tail platforms. Software that quietly runs a business — order processing, claims pipelines, internal admin. Not glamorous, but a problem if it goes down at 3am.

Tech we reach for

We use boring, well-understood technology. The frameworks are picked for fit, not because they trended on Hacker News last quarter.

  • Frontend. React, Vue, Angular. TypeScript everywhere.
  • Backend. Java with Spring Boot, Node, occasionally Python.
  • Mobile. React Native or native when the use case demands it.
  • Database. Postgres for ~everything, with the occasional Redis or message queue when load justifies them.

What we don’t do

We don’t take on work that requires us to pretend to be experts at things we’re not. If you need a marketing site, an ad campaign, or a brand identity, we’ll happily refer you to someone better.

04

Cloud & infrastructure

Architectures that scale without becoming someone else's problem at 3am.

Tags
  • AWS
  • Docker
  • Kubernetes
  • Terraform

What we do

Cloud infrastructure that pays for itself in nights of uninterrupted sleep. We design, build, and operate systems on AWS, GCP, and (where it makes sense) on-prem or hybrid. We pick the architecture that fits the workload — not the one that maximizes cloud spend.

How we typically engage

  • Greenfield platforms. New infrastructure designed from scratch, with the trade-offs documented so the next engineer can read them.
  • Migrations. Lift-and-shift, replatforming, or full re-architecture. We’ve moved enough monoliths to know which paths are worth taking and which to avoid.
  • Stabilization. A system that mostly works but pages someone too often. We diagnose, instrument, and fix the actual root causes — not just the symptoms.
  • Ongoing operations. Long-term partnership where we keep the lights on, manage incidents, and handle the unglamorous patching that nobody else wants to own.

What we run on

  • AWS — most of our work. EKS, ECS, RDS, Lambda, the usual suspects.
  • GCP — when there’s a reason (BigQuery, Vertex, regulatory).
  • Kubernetes — when the operational overhead is justified. Not by default.
  • Terraform — infrastructure as code, version-controlled, peer-reviewed.
  • Docker — everywhere.
  • Observability — Prometheus, Grafana, OpenTelemetry, occasionally Datadog.

What we don’t do

We don’t sell you on architecture that’s more complex than your problem requires. If a single EC2 instance and a managed Postgres are the right answer, that’s what we’ll propose. The job is to solve your problem, not to maximize our retainer.

05

Technical consulting

Honest advice on the choices that are hard to undo later.

Tags
  • Architecture
  • Audits
  • Strategy

When this is useful

Some technical decisions are easy to change later. Others quietly lock you in for years. We’re the team you bring in when you need an honest second opinion on the second kind — and you’d rather pay for it now than discover the cost in eighteen months.

How we typically engage

  • Architecture reviews. We read your design docs, talk to your engineers, and produce a written assessment with prioritized recommendations. Usually 2–4 weeks.
  • Technical due diligence. Acquisitions, partnerships, large vendor commitments. We assess the engineering, not just the codebase — team, process, debt, key-person risk.
  • Second opinions. A specific decision (build vs buy, framework choice, migration approach) where you want an outside perspective from people who don’t have an axe to grind.
  • Fractional CTO. For founders who need senior engineering judgment but don’t yet need a full-time hire.

What we won’t do

  • We won’t tell you what you want to hear. If your architecture is fine, we’ll say so and refund the difference. If it isn’t, we’ll explain why in language your CFO can read.
  • We won’t recommend ourselves for the implementation work that follows from the review unless you explicitly ask. The advice and the build are separate engagements for a reason.

Output

Every engagement ends with a written deliverable — usually 10–30 pages — that your team can act on after we’ve left. Slide decks on request, but we’d rather you have the document.

06

QA & testing

The unglamorous work that keeps your weekends free.

Tags
  • Automation
  • Load testing
  • CI/CD

What we do

Testing infrastructure that catches regressions before they reach production. Release pipelines that turn deployments into a non-event. Monitoring that pages someone before your users notice.

Most teams underinvest in this work because it never feels like the most urgent thing — until something breaks at the worst possible moment. We help you do the boring work that prevents the exciting incidents.

How we typically engage

  • Test automation buildouts. A real test suite — unit, integration, end-to-end — wired into CI and trusted by your team. Not a thousand flaky tests that everyone learns to ignore.
  • CI/CD pipelines. Deployments that are fast, reproducible, and rollback-safe. We’ve seen enough of the alternative.
  • Load and performance testing. Realistic load profiles, identified bottlenecks, documented headroom. Especially valuable before launches or seasonal peaks.
  • Quality engineering as a practice. Embedded with your team for a quarter or two, leaving behind both the infrastructure and the habits.

Tools we use

  • Test runners. Jest, Vitest, Playwright, Cypress, JUnit. Whatever your stack speaks.
  • CI. GitHub Actions, GitLab CI, occasionally Jenkins (when we have to).
  • Load. k6, Locust, JMeter.
  • Monitoring. Prometheus + Grafana, Datadog, Sentry.

A note on testing philosophy

We don’t believe in 100% coverage as a goal. We believe in covering what matters — critical paths, edge cases that have bitten you before, integrations that are likely to drift. A small, fast, trustworthy test suite is worth more than a giant one nobody runs.

07

Stack

Well-understood technology, picked for fit rather than fashion. The list below is grouped by what it does — we reach into a category based on the problem, not the other way around.

Category What it's for What we reach for
Frontend For web interfaces that have to feel fast and stay maintainable. React, Vue, Angular, Type Script, Next.js
Backend Well-understood languages for systems that have to run for years. Java, Spring Boot, Node, PHP
Cloud Picked for fit, not fashion. We deploy where the workload makes sense. AWS, Azure, Google Cloud
DevOps & infrastructure Containers, orchestration, and infrastructure-as-code by default. Docker, K8s, Terraform, GitHub Actions
Data Relational and document stores. Picked for the data model, not for novelty. Postgre SQL, SQL Server, MongoDB
Platforms Third-party platforms our clients run their business on. We customize, extend, and integrate them. Oracle NetSuite, Oracle OTM, Shopify, WordPress
08

Engaging Spainlink

Starting a conversation

Most engagements start with a short email. A few lines about the problem and the rough shape of what you're after is enough to know whether we can be useful. We reply within one business day — usually faster.

If the fit looks right, we set up a short call. If it doesn't, we say so and (where we can) point you at a team better placed to help.

Reach us

General [email protected]
Support [email protected]
Hiring [email protected]
Privacy [email protected]
Europe +34 665 445 284
North America +1 727 370 2467
Web https://spainlink.es
LinkedIn https://www.linkedin.com/company/spainlink