Working as a Full-Stack Developer at Sparkhouse – a typical assignment

You work full-time in a client assignment where we build and further develop a secure web platform for collaboration and data sharing. You own features from idea to production – UI, API and data layer – and you work closely with the client’s product owner. We take the technical responsibility so the client doesn’t have to.

Working as a consultant at Sparkhouse

A large Swedish organization needed a platform where projects could share data securely. The solution is a multi-project portal with roles and permissions, searchability across large data sets, traceability and automation that reduces manual work for users.
The platform is alive and growing – new teams join, regulations change and requirements become stricter. This is long-term product development, not a “build and hand over” case.

Full-stack developer for real

User flows in the portal: lists, filters, uploading, sharing, error feedback.
APIs and services: validation, logging and orchestration of background jobs.
Permissions and traceability: clear roles, who is allowed to see what, and who did what.
Search and discoverability: users quickly find the right files with relevant filters.
Automation: heavy tasks (such as file moves and indexing) run in the background.
Quality and operations: testable code, metrics, alerts and safe releases.

The goal: less manual work for the client, stable delivery and clear value for end users.

Long-term work – how the assignment evolves over 12–18 months

Quarter 1–2: Stabilize the foundation, build the most important flows, onboard the first projects.
Quarter 3–4: Scale up permissions and data structures, improve performance and search, address technical debt.
Quarter 5–6: Major upgrades in frameworks and languages, new roles and policies, more automation and better developer experience.

Every quarter ends with measurable effects: shorter lead times, fewer manual steps, happier users.

A day at work

08:45 – Standup with the client’s product owner: what are we releasing today, what is blocking?
09:15 – Troubleshooting a slow user flow. Find the bottleneck, fix it, measure the impact.
10:30 – Pair programming: new permission level and updated UI logic.
11:45 – Code review and tests; pace is maintained without sacrificing quality.
13:00 – Planning the next sprint slice: a small, complete piece from API to UI.
14:00 – Implementing asynchronous file transfer – the user no longer has to wait in the web interface.
15:45 – Demo for the client team: show what’s new, collect feedback, prioritize.
16:30 – Controlled release. Alerts and dashboards are green. Done.

Examples of problems you solve

New role/permission: data owners can see everything in their project, but not in others.
Faster search: improved indexing and filtering deliver results in seconds.
Heavy background jobs: uploads and large file transfers run asynchronously with clear status.
Traceability: the user sees who moved what and when, directly in the interface.

How we work

Full-time in the assignment – you become an extension of the client’s product team.
Light ceremonies, clear results – short standups, demo every sprint, measurable goals.
Small, safe changes – work is broken into safe, shippable pieces.
Code review as standard – two pairs of eyes on all important code.
Observability – we see performance and errors before the users do.

Technology – at a level that matters

You work in an environment where web, API, databases, permissions and queue jobs all fit together. Typically you use Python with modern web frameworks on the backend and a React-based UI on the frontend. Under the hood there are message queues, databases for relational, graph and search use cases, and policy-driven access. You don’t need to know everything on day one – you learn in the assignment.

Who thrives in this role?

You like owning the entire flow – from a button in the UI to a log entry in the backend.
You can explain technical decisions simply to non-technical people.
You choose pragmatic solutions and write code that is operationally sound.
You prefer stable teams and long-term goals over quick fixes.

What you can expect from us

Clear mandate to improve, not just build.
Time for quality: tests, review and reasonable technical debt.
Support from senior colleagues in architecture, security and data.
A predictable workday with room to learn new things.

Want to work on assignments that make a real difference – without the client having to worry about the technology?

Contact us with your LinkedIn profile or a message about what you want to develop next.

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Full-time assignment as a full-stack developer where you own features from UI to API. Secure data-sharing portal, measurable impact and long-term product development.