Senior Backend Engineer

Location: Barcelona / Madrid (hybrid) or London Company: Next-generation commodity trading platform — Series B ($42M, Feb 2025)

About the company

We're building the next generation of commodity trading platforms — replacing the fragmented tools traders typically rely on with a single, powerful dashboard. Our product aggregates real-time feeds from across the commodities domain and turns them into intuitive, actionable visualisations in one unified interface. Users can explore pre-built data views or define their own custom formulas to create tailored insights.

We're growing fast off the back of a $42M Series B, and this is an early-stage opportunity to build your career with a level of ownership and impact you don't get at bigger, more bureaucratic companies.

The role

Our engineers tackle real distributed systems problems daily — designing for reliability and performance at scale is essential to a seamless user experience. As we unlock the next level of scale, those problems get harder and more interesting. This role is for an engineer who wants to own meaningful parts of that system now, and grow into the technical decisions that shape it.

We're looking for people who thrive in an empowered environment — engineers comfortable being given problems to solve rather than solutions to implement. You'll enjoy working at pace, value autonomy, and prefer to ask for forgiveness rather than permission. You won't be handed tickets — you'll be handed context, and trusted to work out the right thing to build.

This is a hybrid role — a couple of days a week in the office, with flexibility built in.

What you'll be doing

- Design,



build and maintain the backend services behind our real-time and analytical data processing
- Own features end to end, from shaping the approach to running them in production
- Optimise pipelines and services for low latency, high throughput and scale
- Work with engineers, product and stakeholders to stay aligned on direction
- Contribute to design reviews with a clear view on trade-offs
- Keep your services healthy — observability, feedback loops, incident response
- Raise the bar around you through code review, pairing and knowledge sharing

About you

- 4+ years as a software engineer, with production systems you've built and supported
- High ownership tendencies
- Experience in a product-focused organisation, working cross-functionally
- Comfortable across multiple languages — we mainly use Kotlin, Java, Python and TypeScript
- Able to reason about trade-offs (throughput, latency, consistency, cost) and explain them
- At home in system design and in low-level implementation detail
- Experience building and deploying services on AWS or GCP
- Hands-on exposure to Kafka, Flink, Redis or clustered Postgres, and an appetite for more
- Comfortable with agent-based development tools (we use Claude Code; any equivalent is fine)
- A clear communicator and a pragmatic problem-solver

Nice to have

- Experience with data-intensive applications at scale
- Building and interpreting observability — metrics, logging, tracing
- Exposure to working within or alongside DevOps, SRE or infrastructure teams
- Complex distributed environments — high throughput, low latency, large datasets
- Any exposure to commodities, energy or financial markets (useful, but not required — we'll teach you the domain)

📌 Backend Developer | Senior (Cataluña)
🏢 Talent-R
📍 Cataluña