Your Mission

Cosuno is a B2B marketplace connecting general contractors and subcontractors across the construction industry. As our Senior Lifecycle & Retention Manager, you'll build the growth engine that turns new users into active, paying and retained customers — and move us toward an AI-native, signal-driven system that decides what happens next on its own. You'll be one of the first to join the marketing lead in a lean marketing team: you'll shape how it operates as it scales, not just execute inside a fixed setup.

What you’ll do

You build the CRM programmes and lifecycle journeys that drive adoption and conversion — from first tender discovery to paid conversion for subcontractors, and early product adoption to repeat tendering for construction companies.
Together with the Marketing Lead, you build an agentic, signal-driven system that turns behavioural data, call insights and enrichment signals into personalised next-best-action triggers — replacing static journeys with ones that decide what happens next on their own.
You experiment and measure with A/B tests and holdout groups, so decisions are based on incremental impact, not campaign output.
You scale what works into a repeatable system, not one-off campaigns.
You connect journeys with Sales and Customer Success, handing off to a human touch when that's more effective than automation.
You use CRM as a lever for marketplace liquidity — getting the right subcontractors onto the right tenders — and orchestrate email, in-app, transactional comms and marketplace recommendations as one journey with Product.
You support growth programmes such as referrals — from design through CRM execution.

What You Bring

You've owned CRM, lifecycle, retention or growth programmes and can show the commercial impact they created — ideally in B2B SaaS or a two-sided business model.
You've directly influenced conversion, activation or retention metrics and are confident with data and experimentation.
You're genuinely AI-native: proven experience building AI-driven automation or agentic CRM systems, not just using AI to write copy faster.
You write and run SQL queries independently.
You go from data → insight → idea → implementation → result without needing someone else to define every step, and you like solving ambiguous problems and building from scratch.
You work effectively across Product, Sales, Customer Success and Engineering, and care more about measurable business impact than campaign output.
A plus: hands-on experience with ActiveCampaign and Salesforce (or comparable CRM tools).
Fluent in written and spoken German and English.

Your Benefits

Room to shape and grow: One of the first marketing hires — real ownership of lifecycle and CRM, with plenty of space to make an impact.
AI at the core: Our product uses AI to analyze millions of price data points and help construction companies bid better — and we invest in it just as much internally. You'll build with the latest tools and move fast, not wait for approval.
Competitive compensation: Salary above market average, permanent contract in a stable, well-funded company.
Work-life balance: Fully remote or from our office in Berlin Kreuzberg, flexible hours.
Top-notch equipment: A new MacBook Pro.
A great team: Open, international, with regular off-sites and team events.
Growth & feedback: Open feedback culture with regular 1:1s and development conversations.

About us

Cosuno – Revolutionizing construction through technology.

We are Cosuno – a fast-growing tech startup that is making the construction industry more efficient and transparent with our digital platform for tenders and procurement processes. Our goal: to solve the most complex challenges in the industry with innovation and simplicity.

Join us – Build the future of construction.

Compensation: €65K – €85K

• €65K – €85K