Senior Software Engineer - Full stack Backend specialization

Responsibilities

You will join a development team to build and deliver innovative features for a private equity SaaS platform, focusing on both frontend and backend development. Responsibilities include maintaining high code quality, working on complex graph problems, and implementing bulk processes using Temporal workflows.

Requirements

Candidates must have 4+ years of commercial experience as a full-stack developer with a backend specialization and strong proficiency in Node.js, React.js, and TypeScript. You should be based in Sofia, Bulgaria, and possess a collaborative mindset with experience in high-growth software environments.

Skills

• Node.js
• React.js
• TypeScript
• PostgreSQL
• NestJS
• PrismaORM
• Jest
• Playwright
• TanStack Query
• OpenAPI
• Temporal
• OpenFGA
• Docker
• Kubernetes
• AWS
• Terraform

About this role

The Opportunity
Dealstack is on a mission to power private equity. Today, there is no purpose-built tech in place to power the world of private equity. Dealmaking is manual, chaotic and backward. Dealstack is a SaaS platform that puts an end to these outdated practices, setting a new collaboration standard in the industry. Dealstack is built by PE, for PE. Founded by experienced professionals from within the industry, our products sit at the intersection of SaaS, fintech and legaltech.
Dealstack has an ambitious, multi-product roadmap. The first product went live in 2023. It allows private equity professionals to easily onboard and maintain investment programs. Following strong commercial traction from leading industry players, we are looking for ambitious individuals, with proven software engineering skills and experience working for a high growth software company to support our Tech Team. The role presents an exciting opportunity to build and deliver innovation to a fast-moving industry.
Who you are
4+ years of commercial experience as a Full stack developer with Backend specialization
Based in Sofia, Bulgaria, working remotely with 6 hours of overlap with UK time zone business hours
Interested in working with fresh tech stack and being part of an independent team
Interested in solving real engineering problems, with a process that exists to help us ship safely rather than for its own sake
Interested in fintech and SaaS, ideally private equity
Works cleanly with a value of writing collaborative code first
Opinionated and passionate. We like people who have strong opinions about their work
Uses AI coding assistants (such as Claude Code) as part of everyday work, and reviews their output as critically as a colleague's
What job involves
You will be joining the development team with experienced people helping to choose the best business-tech solution providing unique experience to ship new features both on FE and BE
You will be shipping new features while maintaining high standards in code quality
You will work in a small team where we focus on quality over quantity and excellence over speed
You will have a voice to work with other senior developers on technical choices. We run a meritocracy where all can be heard and the best ideas win out
You will work on graph problems and visualization (ownership structures and cap charts), instrument and vesting calculations, and document workflows from generation to e-signing
Building component-based UIs in React (Mantine, TanStack Query, react-hook-form) and backend services in Node.js and NestJS
Working across a typed API boundary: REST endpoints described with OpenAPI, with generated TypeScript clients on the frontend
Building long-running and bulk processes, such as bulk signing and document generation, on Temporal workflows
Working on fine-grained authorization (OpenFGA) and multi-tenant data scoping, where correctness and security matter as much as features
Working with team where there is a healthy balance between speed & perfect quality. Stability is our primary goal but also in terms of maintainability
Desirable skills
Skills we are looking for
Solid knowledge and experience using Node.js & React.js – these are our main and only FE & BE frameworks
Strong TypeScript – we use it at a sophisticated level, with a strict type system and no unsafe casts
Strong PostgreSQL: data modelling, query design and indexing, and comfort with SQL beyond what an ORM generates (functions, views, triggers)
Understanding of ORM and repository pattern (i.e. PrismaORM)
Experience writing tests with Jest and Playwright
Understanding of server state and client state in React.js (TanStack Query, Redux)
Experience or at least understanding of work at the product-based company
Having engineer mindset, ability to understand problems without going too deep in terms of low level
Comfortable with working in a team environment, e.g. pair programming
Very strong communication, influencing and presentation skills, with a deep sense of personal excellence and accountability
Positive, mature approach to problem solving
Team player with a desire and ability to function in a fun, flexible, changing environment
Speak very good English (on daily basis)

Nice to have
A working knowledge of statistics, particularly experimental design and inference (for example from a quantitative degree or hands-on ML work), applied to measuring and improving the accuracy of AI-driven features in the product
DevOps experience valued - Docker, Kubernetes (Helm on AWS EKS), AWS services such as RDS, and CI pipelines in GitHub Actions
Experience with Temporal or another durable workflow engine
Experience with authorization systems such as OpenFGA or other Zanzibar-style models
Experience in fintech or a regulated environment (ISO 27001, SOC 2)
Hands-on infrastructure-as-code experience with Terraform on AWS (RDS, EKS, S3, SQS, IAM), including keeping state in line with what is actually running and keeping cloud spend in check

Why us?
How we work
A weekly release train, moving towards continuous delivery from main
Every pull request gets its own review environment, where QA and product accept the change before it merges
Developers own quality: clear testing notes, impacted areas, edge cases and seed data, backed by unit, integration and Playwright end-to-end tests
AI-assisted development is part of the workflow: the codebase is set up for AI coding assistants, and we expect engineers to use them well
"Agile" but not SCRUM. We believe that tools are to help us rather than blindly follow them
Time to plan and think before implementation. We believe delivering proper software is not only coding but also thinking about how to do it
About us
Dealstack is on a mission to power private equity
Dealstack was founded by experienced private equity practitioners with the goal of ending the outdated deal administration practices that have plagued the industry since its inception. Manual and repetitive, these pract...

About Dealstack

Software Development · 11-50 employees · headquartered in London, England · founded 2022