Python Developer

Salary Competitive

Hey Dev! 👋

We're building something extraordinary, and we need someone who shares our obsession with elegant code and meaningful impact. We've just secured significant funding to accelerate our development and scale big – which means this is the perfect time to join a rocket ship that's ready for takeoff.

If you're the type who loses track of time solving complex problems and gets genuinely excited about AI's potential to transform how people work – keep reading.


What We're Building

Zefram isn't just another AI tool – it's a sales assistant that actually learns, adapts, and takes real responsibility off salespeople's shoulders. Think of it as giving superpowers to sales teams through a sophisticated blend of:

  • Advanced data processing and analysis

  • Natural language generation that feels genuinely human

  • Cross-platform interfaces (web & mobile)

  • Intelligent decision-making that gets smarter over time


The technical challenge? Creating a system that can acquire data, process it intelligently, and communicate insights in natural language – all while continuously learning and improving.


Who You Are

You're someone who's spent years experimenting with code – trying new technologies, building side projects, and exploring "what if" scenarios just because you're curious. You've built projects that matter to you – whether for work or pure fascination – and you've felt both the agony of debugging at 2 AM and the pure joy of finally cracking that impossible problem.

You must have:

  • Strong Python skills

    You've built real systems, not just small scripts. You're comfortable with frameworks, libraries, and scaling Python applications.

  • Hands-on LLM experience

    You don't just "try" AI tools, you rely on them. Tools like Cursor, Copilot, and ChatGPT are integral to how you develop efficiently. You understand that modern development means harnessing AI to amplify your capabilities.

  • Fluent spoken Finnish or English.

You probably also relate to this:

  • You've moved beyond getting stuck on basic bugs – your challenges are more architectural now

  • You genuinely believe "anything is possible – time is the only constraint"

  • You're curious about how systems really work under the hood

  • You see AI as a superpower for developers, not a threat


What You'll Do

As our Python Developer, you'll be at the heart of everything:

Core Responsibilities:

  • Build and enhance our Python backend systems that handle complex data processing

  • Design and implement data pipelines that feed Zefram's intelligence

  • Integrate with multiple LLM APIs and optimize their performance

  • Collaborate on data architecture and app design decisions

  • Write clean, tested code and participate in peer reviews

  • Help scale our system to new markets and user segments

Technical Stack:

  • Backend: Python, REST APIs, PostgreSQL

  • AI/LLM: OpenAI, Anthropic, and other cutting-edge APIs

  • Infrastructure: Google Cloud Platform / AWS

  • Principles: Clean Code, comprehensive testing, collaborative code review


Our Culture & What You'll Get

Trust by default. You'll probably have more autonomy than you've experienced before. We're a small, tight-knit team that believes in leaning on each other while expecting everyone to bring solutions, not just problems.

Our values in action:

  • Honest – We tell the truth about challenges and celebrate real wins

  • Respectful – Every idea gets heard, every person matters

  • Curious – We're constantly asking "what if?" and "how might we?"

What's in it for you:

  • The tools you need to do your best work

  • Competitive salary that reflects your value

  • Full-time in-person work at our Vallila office – we're looking for someone who wants to be part of a real, physical team rather than a collection of profile pictures in Slack channels

  • The chance to shape a product that's genuinely changing how people work


Ready to Apply?

We keep things agile – including our hiring process. We'll fill the position as soon as we find the right person.


To help us get a real sense of how you work, we warmly encourage you to include the following in your application:

  • Your specific contributions

    After reading what we're building, tell us what you believe you could bring to the team. The more concrete your thoughts, the easier it is for us to see the fit.

  • A glimpse of your code

    We keep our process efficient, so seeing some code early on is a big help. A GitHub link, a public profile, or even a short description of a project you'd be happy to demo when we meet is perfectly fine.


Including these two pieces greatly increases the chance that we'll move forward together.


Important notes:

  • Applications can be sent in Finnish or English

  • Believe it or not, the best way to differentiate nowadays is to write your application yourself (you know what we mean)


Ready to build something that matters? Let's talk.

For more information or questions please contact us at antti@zefram.com

Perks and benefits

This job comes with several perks and benefits

Free coffee / tea
Free coffee / tea

New tech gear
New tech gear

Work life balance
Work life balance

Flexible working hours
Flexible working hours

Free office snacks
Free office snacks

Gym access
Gym access

See all 8 benefits

Working at
Zefram

Zefram turns data into action. It isn't just another AI tool - it's a sales assistant that actually learns, adapts, and takes real responsibility off salespeople's shoulders. The problem we solve is simple but painful: finding new customers still takes a ridiculous amount of time and manual work. Traditional company databases give you raw leads, spreadsheets, and bloated filters — but then leave you alone to do the hardest parts: research, personalization, outreach, follow-ups, and staying consistent day after day. At the core of Zefram is a massive company database enriched with both structured data (public company records, financial statements, decision-maker info) and AI-optimized data points like business descriptions and up-to-date financial narratives. We analyze, normalize, and connect this information so it’s not just searchable — it’s usable. Some of the insights we provide, including line-level financial data, are nearly impossible to find elsewhere in ready-to-use form. But we go far beyond traditional data platforms. Zefram doesn’t just show you companies — it works for you like a real assistant. Once you define your ideal customer profile and messaging goals, Zefram independently: - Finds relevant prospect companies - Identifies the right decision-makers - Locates verified contact details - Analyzes each company’s background to answer your key sales questions - Writes highly targeted, personalized outreach emails based on real business arguments - Sends messages and manages follow-ups - Tracks responses and escalates human tasks (like calls) when needed Instead of chasing vanity metrics or blasting high-volume campaigns, Zefram focuses on quality and relevance. Engaging in roughly ~10 carefully selected new companies per workday — enough to drive results without turning outreach into spam. We believe modern sales should be precise, respectful, and effective. Looking ahead, Zefram will extend its assistant capabilities even further — answering unknown incoming calls on the user’s behalf, identifying callers, and handling early-stage qualification automatically. We’re here to build the future of B2B sales operations: not louder, not busier — just smarter. For doers who care about outcomes more than buzzwords. It’s company data. Made for people who get things done.

Read more about Zefram

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