Senior Backend Engineer

Samaipata; Barcelona; On-site; EUR 90,000 - 125,000; Full time

Benefits offered by this job

Pension Plan (Arca)

Short Fridays

Gym discount

Fresh fruit every day

Aticco office

Learning & conferences

Career growth

Team events

Collaborative culture

Job summary

Enginy, a Barcelona-based AI-native GTM platform startup, is hiring a Backend Engineer to own high-throughput workflows, data pipelines, and integrations with CRMs and tools used by sales teams.

You will design, build and operate core services, APIs and async workflows, ensuring performance, reliability and observability as the product scales in a fast-moving environment.

Qualifications

• 5+ years of professional software engineering with a backend focus.
• Strong experience with TypeScript and Node.js.
• Solid understanding of modern API design and async workflows.
• Experience with relational databases (PostgreSQL or similar).
• Ability to work autonomously, debug complex issues and ship high-quality code.
• Strong communication skills and an advanced level of English.
• Bias for action and ownership in a fast-moving startup.

Responsibilities

• Core services: build and maintain scalable, reliable services that power our engine.
• Async workflows: design data pipelines and orchestrations with Temporal.
• APIs & integrations: production-grade APIs and external platform integrations.
• Performance & reliability: optimize, debug, and observability.
• End-to-end delivery: collaborate with Product, Design, and Frontend to ship features.

Skills

Backend development

TypeScript

Node.js

API design

PostgreSQL

Autonomy

English fluency

Tools

Temporal

Redis

Elasticsearch

Kafka

GitHub Actions

Job description

Join one of Southern Europe's fastest-growing startups

Enginy is a Barcelona-based startup and one of Southern Europe's fastest-growing companies ranked #3 in the Sifted 100: Southern Europe 2026, and we're just getting started.

We're building the AI-native GTM platform for modern B2B teams, combining prospecting, enrichment, intent signals, AI research and outreach into one product so sales teams can focus on what truly matters: selling. No wasted time, just results.

After raising a €5M seed round, we're scaling internationally and growing the team behind the product. That means more users, more data, more integrations and harder engineering problems exactly the stage where strong engineers have an outsized impact.

As a Backend Engineer, you'll have real ownership from day one over the engine behind our platform: high-throughput workflows, data pipelines and integrations with the tools our customers live in. You'll make real technical trade-offs and help define how we build as the company scales.

If you enjoy designing systems that hold up under load, debugging the hard stuff and seeing your work directly impact customers, you'll have plenty of room to make a difference here.

About the role

Every lead found, every signal detected and every message sent on Enginy runs through our backend. As usage grows, so do the volume, the integrations and the reliability bar and that's the problem space you'll own.

We're looking for an engineer who does more than execute tickets: someone who owns problems end to end, from design to production to observability.

Design → build → ship → observe → scale

What you'll own

• Core services: build and maintain scalable, reliable services that power our core engine
• Async workflows: work with async architectures, data pipelines and workflow orchestration with Temporal
• APIs & integrations: design and implement production-grade APIs and integrations with external platforms (CRMs, LinkedIn and more)
• Performance & reliability: optimize performance, debug complex issues and ensure strong observability across the system
• End-to-end delivery: collaborate closely with Product, Design and Frontend to ship complete features with a focus on quality, reliability and speed
• Engineering standards: help shape engineering practices, code quality and architecture as we scale

About you

• 5+ years of professional software engineering experience with a strong backend focus
• Strong experience with TypeScript and Node.js
• Solid understanding of modern API design and async workflows
• Experience with relational databases (PostgreSQL or similar)
• Ability to work autonomously, debug complex issues and ship high-quality code
• Strong communication skills and an advanced level of English
• Bias for action and ownership you thrive in a fast-moving startup

Nice to have

• Experience with workflow engines (e.g. Temporal), distributed systems or microservices
• Experience with Redis, Elasticsearch, Kafka or third-party API integrations
• CI/CD practice with GitHub Actions
• Experience in early-stage or fast-scaling startups
• Interest in B2B SaaS, sales tech or automation tools

Hiring process

We've designed our hiring process to be close to real engineering work. No trivia-heavy interviews and no artificial take-home exercises we focus on how you think through product problems, technical trade-offs, ambiguity, quality, and the use of AI as part of modern engineering.

One of our tech leads wrote about the philosophy behind it here: https://oriolcastro.me/posts/hiring-for-modern-engineering/

What to expect:

1. Intro conversation: your background, your goals, and the environment where you do your best work.
2. Short practical task: based on a small version of our product. We care about prioritization, scope, reasoning and delivery within constraints. Use AI tools, just like you would on the job.
3. Technical/product conversation: realistic engineering problems, not stack trivia.
4. Final conversation: team fit, expectations and next steps.

What we offer

• Competitive salary tailored to your experience.
• Enticing performance bonuses that you won't see anywhere else.
• Flexible remuneration through Cobee.
• Pension Plan through Arca.
• Short Fridays all year round and extra days of vacation for your birthday and Geneversary.
• A discount on a premium gym (with spa access) just a step away.
• Free fresh fruit every day to help you care for your health.
• Aticco office so you can work with stunning views an inspiring and energizing workspace.
• Continuous learning, including but not limited to mentoring, coaching, workshops, and opportunities to attend SaaS conferences.
• Career growth opportunities, as we won't let your dedication and results go unnoticed.
• Team gatherings and celebrations, because we love to build connections and celebrate achievements together.
• A collaborative culture because we foster hard work, teamwork, transparency, and respect, encouraging open communication and a positive environment where your voice matters.
• If you're not sure you meet 100% of the requirements we still want to hear from you.

Research shows that candidates from underrepresented groups often self-select out even when they're a strong match. If this role excites you and you believe you can make an impact at Enginy AI, we encourage you to apply.