Backend Engineer

Validio; Stockholms kommun; On-site; SEK 900,000 - 1,400,000; Full time

Job summary

Validio is the agentic data management platform that automates data quality, lineage, and cataloging for enterprises relying on analytics, AI, and reporting. As a Backend Engineer on our Validation Engine team, you’ll build the engine customers pay us for.

We read from multiple source systems, run validators at real volume, and raise incidents when something goes wrong. You’ll own pieces end to end, including the protobuf contract, the Rust service, the SQL it generates, and the worker loop that

Qualifications

• Production experience with Rust or Go services.
• Strong grasp of async runtimes, backpressure and memory layout.
• Deep SQL knowledge including window functions and dialect differences.
• Ability to reason about invariants and what changes preserve or break.
• Experience directing AI tools responsibly to keep codebases coherent.

Responsibilities

• Own parts of the engine end to end from proto contracts to production metrics.
• Build source connectors for warehouses, including schema introspection and auth.
• Generate correct, performant SQL across dialects.
• Extend lineage parser to cover more dialects.
• Debug hard systems issues and improve regression tests.
• Collaborate with Customer Success, Solutions Engineering, and Support on customer problems.

Skills

Rust

Go

SQL

Systems design

AI tooling judgment

Tools

PostgreSQL

Redis

Kubernetes

Protobuf

gRPC

Job description

Validio is the agentic data management platform that automates data quality, lineage, and cataloging — so enterprises can finally trust the data behind their analytics, AI, and reporting. As a Backend Engineer on our Validation Engine team, you build the part that does the actual work — the engine customers pay us for.

We read from twenty-something source systems, run validators against the data at real volume, and raise incidents the moment something is wrong. You'll own pieces of it end to end: the protobuf contract, the Rust service behind it, the SQL it generates, the worker loop that runs it, and the metrics that say it's healthy.

What you'll do

• Own parts of the engine end to end, from proto contract to production metrics

• Build source connectors for the warehouses customers ask for — schema introspection, query generation, auth, the full path

• Generate correct, performant SQL across every dialect our customers run on

• Extend our lineage parser into the dialect corners it doesn't cover yet

• Debug hard systems problems — dropped watermarks under load, lock contention, query plans that don't scale — and leave the regression test behind

• Work directly with Customer Success, Solutions Engineering, and Support, and be on the call when the customer describes the problem

What you'll bring

• Rust or Go shipped and maintained in production — a service that paged you at 3am, and that you then made stop paging you

• Real comfort at the systems level: async runtimes, backpressure, memory layout, lock contention, what a query planner is actually doing

• SQL well beyond SELECT — window functions, query plans, dialect differences, and debugging by reading EXPLAIN rather than guessing

• An instinct for invariants: you can say what a change preserves, what it breaks, and how it fails before it ships

• The judgment to direct AI tools well — when to lean on them, what they get subtly wrong, how to keep a codebase coherent when half the diffs aren't yours

Bonus points for

• Experience with data quality, observability, lineage, or catalog systems

• Air-gapped or on-prem deployment, and Kubernetes and Helm at production scale

Our stack, and why

Rust for most of the engine — we want a long-running service that holds a lot of state and doesn't surprise us on a Tuesday. Go for ingress, where the job is mostly IO and protocol translation. Protobuf and gRPC between services, with the proto schema as the contract. Python for the SDK and IaC tooling. Postgres and Redis for state, Kubernetes and Helm to deploy, GitHub Actions for the rest. Claude, Gemini, and Codex in daily use — we ship weekly, and we don't pretend AI didn't write what it wrote. You don't need to have used every warehouse on the list; you do need to be the kind of person who reads the dialect's docs when a ticket lands on it.

Why Validio

Founded in Sweden in 2019, we're trusted by data-driven enterprises like Nordea, Canva, Truecaller, Traveloka, and Deutsche Glasfaser. We raised a $30M Series A this year and grew ARR 800% in twelve months as enterprises got serious about making their data AI-ready. At around 25 people, you'll own initiatives end to end and make the call when you're closest to the problem. We're strict about testing and documentation, and fast about decisions.

Come as you are. We hire for what you'll build with us, and we welcome applicants of every background.