Senior Golang Developer
Join Miquido as a Senior Golang Developer
About the project
You'll join the development of a Go-based Data Loss Prevention (DLP) engine - an embeddable SDK that scans text and files for sensitive information such as personal data, financial details, government-issued IDs, health records, and credentials. It's built to run efficiently on the endpoint/agent side, rather than as a heavy backend service, and ships as a lean public SDK and API on top of a much larger internal detection pipeline covering multiple countries and regions, dozens of information types, and a wide range of file formats (PDF, Office documents, email, archives, CSV, images via OCR).
This is genuine, hands-on collaboration with the client's own engineering team - not a hand-off model. You'll work in a real, established, production-grade Go codebase, getting to understand the reasoning behind existing design decisions before proposing changes, and contributing your own perspective on trade-offs rather than simply executing tickets. The role balances independent ownership - driving a feature, detector, or performance improvement end-to-end on your own - with close collaboration through design discussions, code review, and adapting to shifting priorities as the product evolves.
Tasks
Implement new sensitive-data detectors (regional ID formats, financial identifiers, custom info types) following the project's established Detector interface contract
Extend file-format parsing (PDF/Office/archive/OCR) and improve the two-pass detection and n-gram matching pipeline
Profile and optimize detector and parser performance, since the engine is designed to run on constrained endpoint/agent environments
Write and maintain tests using the project's custom testify-based DSL, including regression guards (NegativeTypes) for false positives
Participate in code review and standards discussions, and propose your own architectural suggestions
Collaborate closely and asynchronously with the client's in-house developers on design, scope, and priorities
Keep up with CI requirements (Linux/Windows compatibility, golangci-lint/gosec, real-world detection-accuracy thresholds)
Must have
3+ years of professional Go experience, including idiomatic error handling, interfaces, and pointer-receiver patterns
Strong understanding of regular expressions, string/text processing, and pattern-matching algorithms
Experience writing thorough unit tests (table-driven or DSL-based) and comfort with TDD-style workflows
Ability to work both independently (owning a feature end-to-end) and collaboratively with a remote client team
Openness to changing direction based on client feedback, and confidence to propose your own technical opinions rather than just implementing instructions
Solid Git workflow experience and familiarity with CI/CD pipelines (GitLab CI or similar)
Fluent English, written and spoken
Nice to have
Experience with document/file parsing (PDF, Office formats, archives) or OCR pipelines
Familiarity with data validation domains - checksums, national ID formats, IBAN/credit-card validation, data normalization
Experience with NLP/tokenization basics (NER, n-gram matching)
Background in security-sensitive or compliance-driven software (GDPR, PII handling, DLP/security tooling)
Experience with golangci-lint, gosec, or other static analysis/security scanning in Go
Prior experience contributing to a long-lived SDK/library codebase with a strict public-API boundary
What do we offer?
Flexible B2B cooperation
Real impact on architecture and technical decisions
Possibility to extend cooperation after the initial contract
Work environment where AI is an integral part of development
Work your way - we follow a flexible approach and don't have a strict office or hybrid work policy
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The controller of your personal data is Miquido Spółka z ograniczoną odpowiedzialnością sp. k. with its seat in Krakow, Zabłocie 43a, 30-701 Kraków, Poland ("Miquido", "We", "Our" or "Us"). See more