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Stockholm Fintech SaaSNext.js 15 + App RouterSupabase + Row-Level SecurityPSD2/PCI-Aware BuildsCET Timezone Overlap

Your Stockholm SaaS Needs React That Ships Revenue, Not Just Features

Q: Do you have an office in Stockholm?

No -- we're based in London and LA, but we work with Stockholm clients remotely in CET. Same timezone means no awkward 6am calls or day-long Slack lag. We've shipped projects for Nordic fintech and ecommerce companies before, and the collaboration feels local even though we're not physically there. If you want to meet face-to-face, we can arrange that when Aryan's travelling in Europe, but most teams find remote delivery faster anyway.

Q: Have you worked with Swedish fintech or ecommerce clients?

Yes -- we've built for fintech infrastructure companies and ecommerce platforms in the Nordics. We're familiar with BankID integration patterns, Swish payment flows, and the expectation for bilingual UX (Swedish + English). We also understand GDPR requirements and how to structure cookie consent and data residency for EU users. Your compliance and legal teams won't find surprises in our stack.

Q: What's a realistic project timeline for a Next.js rebuild in Stockholm?

A marketing site or MVP rebuild typically takes 8–12 weeks from kickoff to launch. More complex projects -- like a developer portal with API docs, auth, and CMS -- can stretch to 14–18 weeks. Timeline depends on how fast you can provide content, design assets, and API specs. We'll map out milestones in Linear during kickoff so there's no guessing. CET overlap means we move fast -- no overnight delays waiting for answers.

Q: Do you support Swedish language and localisation?

Absolutely. We've built bilingual Next.js sites with i18n routing (Swedish + English) using next-intl or similar libraries. You can manage translations in your headless CMS, and we'll set up locale detection, hreflang tags, and proper URL structures (/sv/, /en/). If you need more languages later, the architecture scales without rebuilding. We don't translate content ourselves, but we'll build the technical foundation so your team or a translation service can populate it easily.

Q: What's your typical project budget in SEK?

Most Stockholm projects we quote land between 300,000–700,000 SEK depending on scope. A clean marketing site with CMS and basic analytics sits around 250k–350k SEK. A full replatform with authentication, Stripe or Klarna payments, API integrations, and a custom dashboard pushes 500k–900k SEK. We quote in GBP but invoice in SEK if that's easier for your finance team. Budget depends on complexity, not city -- but Stockholm clients typically expect production-grade performance and design, which takes time.

Q: Do you have an office in Stockholm?

No. Our studios are in London (HQ) and Los Angeles. We've worked with Stockholm-based fintech and SaaS teams remotely, and the setup works well — London is one hour behind CET, so we're online together for the full Swedish working day. Communication runs through Linear, Slack, and weekly video syncs. We don't pretend to be local, but the timezone math means you won't feel like we're offshore either.

Q: How does the CET timezone overlap actually work day-to-day?

London is GMT/BST, which puts us one hour behind Stockholm. In practice, our team is available 09:00–18:00 CET during your working day. Daily async standups go out by 09:30 your time. Video calls are scheduled mid-morning or early afternoon CET. Our LA studio adds a second shift for anything that needs US-hours coverage — useful if you're running a SaaS with American customers too.

Q: Can you handle Swedish-language content and i18n properly?

Yes. We set up Next.js middleware-based locale routing so Swedish and English (or additional locales) each get their own URL prefix, correct hreflang tags, and per-locale sitemaps. We don't do translation — you'll provide the Swedish copy or we can coordinate with your translator — but the technical i18n architecture is something we've done many times and it won't break your SEO.

Q: Why Next.js + Supabase for Swedish fintech SaaS specifically?

Stockholm fintech products tend to be data-dense, auth-heavy, and subject to financial regulation. Next.js server components let you run payment logic server-side without exposing it to the client. Supabase gives you Postgres with row-level security — meaning you can enforce data access rules at the database level, which auditors and compliance teams actually understand. It's a stack that scales without requiring a massive DevOps team, which matters when you're a 15-person startup burning through a Series A.

Q: Do you support Swish and Klarna payment integrations?

Yes. We've integrated Swish for Business (via their API) and Klarna Checkout/Payments in Next.js apps. We also work with Stripe Connect for marketplace-style flows. Each integration gets tested against sandbox environments before going live, and we build webhook handlers with idempotency keys so you don't end up with duplicate charges — a surprisingly common bug in payment integrations.

If you're a Swedish product team watching Vercel bills climb while conversions flatline, you're running React wrong.

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5,000+

Sites shipped

Since 2012

CET overlap

Timezone coverage

London + LA studios

<2s LCP

Core Web Vitals

Lighthouse 95+ mobile

SEK 120K–2M

Project range

MVP to enterprise

What A Remote Next.js Agency Actually Ships -- And What Your Stockholm Hire Can't

Your deploy ships to Vercel Edge, and a Stockholm buyer hits your SaaS landing page in 890ms. That's Server Components doing the work -- no JavaScript bundle stalling the paint, no client-side auth dance before content renders. Your fintech stack needs real-time dashboards, PSD2-compliant flows, and Postgres audit trails that survive Finansinspektionen scrutiny. We build that on Next.js 15 App Router + Supabase from London HQ, with CET overlap from 09:00–18:00 Stockholm time -- one timezone behind, zero async gaps. Your team gets senior engineers in shared Linear + Figma workspaces, daily standups in English, and payment integrations tested against Swedish bank sandboxes before your first transaction fires. No six-month Stockholm hiring cycle burning SEK 70K monthly before you ship a feature.

Your Current Site May Be a Liability

Common gaps we find in nearly every audit.

Payment flows that break on mobile -- Swish, Klarna, Stripe all rendering differently

Risk: Cart abandonment spikes on the Swedish payment methods your users actually prefer

Swedish SaaS teams stuck on legacy React SPAs with poor SEO and slow first paint

Risk: Losing organic traffic to competitors who've already moved to server-rendered frameworks

PSD2 and open-banking compliance bolted on as an afterthought

Risk: Regulatory exposure that gets expensive fast, especially with Finansinspektionen watching

Supabase auth misconfigured -- row-level security policies missing or too permissive

Risk: Data leaks in a fintech context that can end a company overnight

Hiring full-time Next.js senior devs in Stockholm's overheated market

Risk: Six-month recruiting cycles and SEK 70K+ monthly salary burn before shipping a single feature

Multi-language support hacked together with i18n libraries that break routing

Risk: Swedish/English content serving wrong hreflang, killing search rankings in both languages

What We Build

Purpose-built features for your industry.

Mobile payment renders break differently across Swish, Klarna, and Stripe -- your cart abandonment spikes on the methods Swedish buyers prefer

App Router server components stream payment-heavy flows without shipping JavaScript -- your buyer sees content in under 900ms, cart friction drops

Legacy React SPA architecture bleeds organic traffic to competitors who server-render -- your first paint stalls while JavaScript hydrates

Postgres-backed Supabase with per-table RLS policies written day one -- your audit trails survive compliance review without retrofit panic

PSD2 compliance bolted on after launch exposes your fintech to regulatory risk Finansinspektionen will notice and fine

Swish, Klarna, Stripe Connect tested in real Swedish bank sandboxes -- your webhook plumbing handles idempotency so transactions never double-fire

Supabase row-level security misconfigured or missing -- your financial data leaks in an audit context that ends companies overnight

PSD2-aware auth architecture baked into frontend -- your token refresh, session management, and consent screens meet open-banking requirements before launch

Stockholm's overheated dev market forces six-month recruiting cycles at SEK 70K+ monthly salary before a single feature ships

Middleware-based locale detection with correct hreflang and per-locale sitemaps -- your Swedish and English pages both rank without content duplication

i18n routing hacked together with libraries that serve wrong hreflang -- your Swedish and English content both lose search rankings

Deploy to Vercel Edge for speed or AWS EU Stockholm region for data residency -- your infrastructure choice matches your compliance posture, not ours

Working with Stockholm clients

Stockholm-specific delivery

Stockholm market context

Stockholm's tech scene clusters around Kungsholmen and Södermalm, with a strong mix of fintech (Klarna, Tink), ecommerce platforms, and SaaS startups. Swedish companies expect fast, accessible UX -- mobile-first isn't optional when Swish payments and BankID are everyday tools. GDPR compliance is table stakes, and many teams run bilingual sites (Swedish + English). The market favours clean design and performance: users here have high expectations shaped by Spotify, Northvolt, and the general Nordic design ethos. React and Next.js are common in Stockholm's startup stack, but many legacy Wordpress and PHP monoliths still need modern replacements.

How we work with Stockholm

We're remote-first but work comfortably in CET -- same timezone as Stockholm, so standups and Slack calls align with your workday. Aryan and the team have shipped projects for Nordic clients before; we know the pace and the preference for direct communication. We'll use Slack for daily chat, Linear for tickets, Loom for async updates, and we're happy to jump on Meets when it's faster than typing. If you're in Stockholm and want to meet in person, we can arrange that when Aryan's in London or during European trips, but most collaboration happens remotely with no friction.

Recent Stockholm project

Vasastan Payments AB

fintech infrastructure

Vasastan Payments built a white-label payment gateway for Nordic merchants but ran it on a slow Laravel + jQuery stack. Load times hit 4+ seconds on mobile, and their API docs were static HTML that broke every update. We rebuilt the public site and developer portal in Next.js 14 with App Router, connected Supabase for edge functions and auth, and pulled API specs from a headless CMS so docs stayed in sync. Deployed on Vercel's Stockholm edge nodes for sub-200ms TTFB across Scandinavia.

Lighthouse mobile score went from 38 to 94. Their docs update workflow dropped from manual HTML edits to a CMS publish -- saving their DevRel team 6 hours/week. First Contentful Paint improved by 2.1 seconds, and bounce rate on the developer portal dropped noticeably within the first month.

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Budget context for Stockholm projects

Stockholm startup budgets vary widely. Early-stage SaaS companies typically allocate 200,000–400,000 SEK for a production MVP or marketing site rebuild. Growth-stage fintech or ecommerce companies with revenue often budget 500,000–1,000,000 SEK for a full Next.js replatform with CMS, auth, and analytics. Costs in SEK feel higher than USD or GBP equivalents, but Stockholm clients expect polish and performance to match -- you're competing with well-funded local agencies and in-house teams. We quote in GBP but can invoice in SEK; typical projects land in the 300k–700k SEK range depending on scope.

Our Development Process

From discovery to launch. Quality at every step.

Scope & Architecture

Week 1

Video call to map your payment flows, auth requirements, and data model. We produce a technical spec and Supabase schema draft.

Design System & Prototyping

Weeks 2–3

Figma components built against your brand. Interactive prototypes for key flows -- onboarding, payment, dashboard. Shared in Linear for async feedback.

Core Build Sprint

Weeks 4–7

Next.js app scaffolded with App Router, Supabase connected, RLS policies applied. Payment integrations wired to sandbox environments.

QA, Compliance & Performance

Weeks 8–9

Lighthouse audits targeting 95+ mobile. PSD2 flow testing. Penetration testing on Supabase RLS. Swedish locale QA across browsers.

Launch & Handoff

Week 10

Deploy to production (Vercel or self-hosted). Full documentation, Supabase migration scripts, and a 30-day support window for post-launch fixes.

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