Development partner

Development Partner for Marketing Agencies

Marketing agencies own the strategy, the creatives, and the client relationship. What I deliver is the technical capability that makes campaigns executable — from complex landing pages to measurable integrations and AI features. Based in Kalmar with a focus on Sweden; Nordic and international engagements are equally welcome — several projects are run in English.

External developer for marketing agencies across Sweden

Marketing agencies own the strategy, the creatives and the client relationship. As a senior external web developer Pihlfelt contributes the technical capability that makes campaigns executable — from advanced landing pages to measurable integrations with CRM, marketing automation and analytics.

Concrete assignments

Custom campaign landing pages with dynamic content and A/B testing.
Integrations between WordPress, HubSpot, Mailchimp, ActiveCampaign and CRM systems.
AI-driven personalisation of content based on visitor behaviour.
Rapid prototypes for pitches or client validation.
Takeover of technical projects that previous developers left unfinished.
Performance optimisation of existing sites ahead of ad campaigns.

White-label or openly

Pihlfelt works both white-label (under your brand) and as an openly disclosed external partner. Your choice per engagement.

Geographic presence

Based in Kalmar, Småland, with agency partnerships across Sweden. All work can be carried out digitally with clear communication and frequent check-ins.

When

When the agency needs me

When a campaign requires a custom technical solution.

When the client wants measurable integrations with CRM, marketing automation, or analytics.

When you have won a project that requires more development than in-house resources allow.

When an existing website needs to be rebuilt quickly without losing SEO.

When you need a reliable technical voice in the client dialogue.

How

How the collaboration works

You own the client relationship — I deliver the technology under your name or openly, as you prefer.

Direct contact between the agency project lead and me. No unnecessary intermediaries.

Clear estimates before we start. No surprises in the invoice.

Quick answers to questions that come up during the project.

Long-term partnership or project-based — both work.

Examples

Example assignments

→ Campaign landing pages with dynamic content and A/B tests.
→ Integrations between WordPress, HubSpot, Mailchimp, and CRM.
→ AI-driven personalization of content based on visitor behavior.
→ Rapid prototypes for pitches or client validation.
→ Takeover of a technical project that a previous developer left behind.

Questions & answers

Frequently Asked Questions

Common situations where the agency reaches out: • A client project requires more technical capability than in-house resources allow. • You have won an engagement but have no developer to take technical responsibility. • A campaign needs a custom technical solution on short notice. • An existing project is stuck or needs to be taken over from a previous developer. • You want to be able to sell tech-heavy engagements without hiring. Both project-based and ongoing collaborations work.

Most often, the agency project lead and I talk directly — without multiple intermediaries. The process: 1. You briefly describe what the client needs. 2. I come back with a time and cost estimate. 3. Once you approve, work starts with continuous check-ins. 4. Delivery to you, either for onward delivery to the client or directly to the client under your name. I work both white-label and openly — your choice.

An external developer is often the right choice when: • The need is too small or irregular for a full-time hire. • You already have a technical team but need extra capacity for a period. • A specific skill is missing in-house — e.g. WooCommerce, Laravel, AI integrations or complex APIs. • You want to be able to take on engagements you would otherwise have to decline. • You want to test a technical collaboration before potentially hiring. For many agencies, an ongoing relationship with an external developer is more cost-effective than a hire — you only pay for what you actually need.

You do. Always. I am a technical supplier to you, not to the end client. That means I don't contact your client without your knowledge, and you control how I am presented — as an external partner, as part of the agency team, or completely anonymously.

Two common models: • Fixed price per assignment, based on an estimate before we start. Good for well-defined projects. • Ongoing hourly billing, with a monthly cap. Good for continuing partnerships where scope varies. Agency pricing is negotiated separately from individual consulting engagements — we find a level that works for both parties over time.

Yes. I deliver the technology, you deliver to the client. Email conversations, documentation and deliveries can be branded as yours. If you prefer that I am openly part of the team in the client dialogue, that also works — it's your choice per project.

View all questions

Other agency types

Partnerships with other agency types

Development Partner for Design Agencies

Senior developer who turns design systems and prototypes into well-built production code.

Development Partner for Communications Agencies

Technical partner for communications agencies that build digital channels and platforms for their clients.

Discuss a partnership?

Get in touch. Based in Kalmar, working with agencies across Sweden.