Senior Backend Engineer at parser – Barcelona | Jobyssey

Senior Backend Engineer

Who is Parser?

Build the next generation of conversational AI experiences powered by real-time data, event-driven pipelines, and production LLM orchestration.

Technology alone does not create impact—the right teams do. Founded in 2018, Parser is a boutique technology services and consulting firm helping global organisations solve complex business challenges through digital transformation, product development and AI enablement.

We are a fast-growing team of 340+ engineers and consultants across Europe (UK, Spain, Portugal), the Americas (US, Argentina, Uruguay, Colombia), and the Middle East. We combine global reach with a mindset focused on agility, senior expertise, and close collaboration.

We work as an extension of our clients’ teams, helping them define the right problems, shape solutions, and deliver technology-driven outcomes that create measurable business value. Our expertise spans software engineering, AI & data, product development, and customer experience, delivered by teams that combine strong technical depth with a consulting mindset.

Why Join Us? If you are looking for a place where you can think beyond execution, take true ownership of outcomes, influence decisions, and continuously learn alongside top-tier specialists in a truly global environment, we’d love to meet you.

How will you impact?

Build the next generation of conversational AI experiences powered by real-time data, event-driven systems, and production LLM orchestration. As a Senior Backend Engineer, you will own backend services powering a new conversational AI product. You’ll design high-throughput microservices, build real-time event-driven pipelines, and integrate LLM-driven tool-calling capabilities to create responsive, scalable user experiences.

Your key responsibilities:

Your responsibilities include, but are not limited to:

Design, build, and maintain high-performance microservices and REST/gRPC APIs primarily using TypeScript (Node.js) and Go.
Architect event-driven and asynchronous streaming workflows utilizing Kafka, SQS/SNS, or similar distributed systems.
Model, optimize, and tune relational and search data stores, including PostgreSQL/MySQL, OpenSearch, and Redis.
Deploy, operate, and scale containerized applications on AWS using Kubernetes (EKS/ECS).
Instrument services with comprehensive observability tools (metrics, logging, distributed tracing) to diagnose non-deterministic behavior in LLM workflows.
Establish clean service boundaries, system documentation, and sound unit/integration testing standards.
Collaborate with cross-functional teams, make product-shaping technical judgment calls, and participate in incident response.

What you’ll bring to the role:

Essential Requirements:

Strong expertise in backend development with Node.js / TypeScript, along with proficiency or quick adaptability in Go.
Proven track record designing microservices architecture, REST/gRPC APIs, and event-driven systems (Kafka, SQS/SNS).
Deep experience with relational databases (MySQL/PostgreSQL), OpenSearch/Elasticsearch, and Redis caching.
Production hands-on experience with AWS services and containerized deployments on Kubernetes.
Solid background in production observability (metrics, tracing, logs), SLO management, and incident response.
Proactive self-starter with strong communication skills and product instinct to operate effectively without rigid specifications.

Desirable Requirements:

Hands-on experience with production LLM applications, including tool/function calling, context management, and caching.
Practical experience debugging non-deterministic systems or AI-driven backend pipelines.

Location & Work Model:

Spain – Remote to Hybrid: Remote for the first 6 months, transitioning to hybrid with 2–3 days per week in our Madrid or Barcelona office.

You will receive:

The chance to join an organization with triple-digit growth that is changing the paradigm on how software products are built.
The opportunity to be part of an amazing, multicultural community of tech experts.
A highly competitive compensation package.
A flexible and hybrid working environment.
Medical insurance.

Parser is committed to fostering an inclusive workplace and providing equal employment opportunities to all applicants regardless of race, religion, gender, sexual orientation, age, disability, or any other protected characteristic under applicable law.

If you require reasonable accommodations during the recruitment process, please let us know and we will work with you to support your participation.

By applying to this role, you acknowledge that your personal data will be processed in accordance with Parser’s Privacy Notice for recruitment purposes.

Parser may use AI-assisted tools during certain stages of the recruitment process to support operational efficiency. Our recruiting teams use AI to streamline note-taking and scheduling.
All hiring decisions are made by people, with human review and oversight.

Come and join our #ParserCommunity.

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